Variable ramp assemblies and system therefor

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an upper support surface which is inclined for substantially its full engageable riding length and is supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, said inclined ramp module and said straight ramp module being of substantially the same length,

• said inclined ramp module being of a generally hollow structure with said triangularly shaped side walls and end wall being of a relatively thin wall thickness, the lower extremities of said triangularly shaped side walls and end wall defining the bottom side of said inclined ramp module, said upper support surface being substantially uniformly flat over its length, said inclined ramp module having a plurality of generally flat internal ribs extending longitudinally and transversely across the bottom of said flat upper support surface at spaced intervals with substantially no distortion of said flat upper support surface, at least some of said internal ribs having end sections with a bottom portion extending inwardly from said flat upper surface and downwardly to substantially the same location as the extremities of said triangularly shaped side walls and said end wall to provide further support for said flat upper support surface and said side walls and end wall of said inclined ramp module at said bottom side.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an upper support surface which is inclined for substantially its full engageable riding length and is supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, said inclined ramp module and said straight ramp module being of substantially the same length,

• said straight ramp module being of a generally hollow structure with said rectangularly shaped side walls and said end walls at opposite ends being of a relatively thin wall thickness, the lower extremities of said rectangularly shaped side walls and said end walls defining the bottom side of said straight ramp module, said planar upper surface being substantially uniformly flat over its length, said straight ramp module having a plurality of generally flat internal ribs extending longitudinally and transversely across the bottom of said flat upper support surface at spaced intervals with substantially no distortion of said flat upper support surface, at least some of said internal ribs having end sections with a bottom portion extending inwardly and downwardly from said flat upper surface to substantially the same location as the extremities of said rectangularly shaped side walls and said end wall to provide further support for said flat upper support surface and side walls and end walls of said straight ramp module at said bottom side.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, a foot member which is a strip-like generally U-shaped resilient structure adapted to be located on edges on at least one of said bottom side of said inclined ramp module and said bottom side of said straight module for contacting the ground surface to inhibit slippage,

• said U-shaped structure having a channel portion with side sections spaced to accept said edges of varying thickness, said channel portion having an opening at its upper end with said side sections being located proximate to each other to at least partially close said opening and adapted to be resiliently moved apart when said edges are moved into said channel portion and to close to resiliently grip said edges to retain said foot member to said edges.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an upper support surface which is inclined for substantially its full engageable length and is supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove both integrally formed on said end wall of said inclined ramp module and on said end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly, matingly moved into said T-shaped channel groove on said one of said ramp modules,

• said T-shaped protrusions having an attaching structure at their ends which are constructed to be vertically in line when two of said ramp modules are in a stacked assembly, separate connecting means constructed to engage said attaching structures of stacked ramp modules when in line to connect said ramp modules together in the stacked condition.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove on said end wall of said inclined ramp module and on said end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly matingly moved into said T-shaped channel groove on said one of said ramp modules, said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end, said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,

• said large protrusion section at the lower end of said T-shaped protrusion adapted to be located in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an upper support surface which is inclined for substantially its full engageable riding length and is supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, said inclined ramp module and said straight ramp module being of substantially the, same length, first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment and second attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for side-by-side alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove both integrally formed on said end wall of said inclined ramp module and on said end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly, matingly moved into said T-shaped channel groove on said one of said ramp modules, said second attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove both integrally formed on said triangularly shaped side walls of said inclined ramp module and on said rectangularly shaped side walls of said straight ramp module, said T-shaped protrusion on one of said inclined ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said inclined ramp modules with said T-shaped protrusion on said another of said inclined ramp modules being slidingly, matingly moved into said T-shaped channel groove on said one of said inclined ramp modules, said T-shaped protrusion on one of said straight, ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said straight ramp modules with said T-shaped protrusion on said another of said straight ramp modules being slidingly, matingly moved into said T-shaped channel groove on said one of said straight ramp modules,

• said T-shaped protrusions having an attaching structure at their ends which are constructed to be vertically in line when two of said ramp modules are in a stacked assembly, separate connecting means constructed to engage said attaching structures of stacked ramp modules when in line to connect said ramp modules together in the stacked condition.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, said ramp system being formable in a stacked relationship with a first said inclined ramp module at the entrance at the ground surface connected end-to-end with one said straight ramp module at the ground surface, and including a second inclined ramp module supported on said planar support surface on said straight ramp module with said inclined surfaces of said first and second inclined ramp modules being in line, said ramp system including first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove on said end wall of said inclined ramp module and on said end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly matingly moved into said T-shaped channel groove on said one of said ramp modules, said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end,

• said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,
• said large protrusion section at the lower end of said T-shaped protrusion adapted to be in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit and with a peripheral gap at the upper ends of said T-shaped protrusion and said T-shaped channel groove,
• said T-shaped protrusion being open at its lower end, connecting means for connecting said second inclined ramp module to said straight ramp module when in a stacked assembly, said connecting means including a generally T-shaped connector having a T-shaped opening at its lower end, said T-shaped opening adapted to fit over the upper end of the T-shaped protrusion on said straight ramp module,
• the upper end of said T-shaped connector adapted to fit within the opening at the lower end of said T-shaped protrusion whereby said second inclined ramp module and said straight ramp module will be secured together in the stacked condition.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, said ramp system being formable in a stacked relationship with a first said inclined ramp module at the entrance at the ground surface connected end-to-end with one said straight ramp module at the ground surface, and including a second inclined ramp module supported on said planar support surface on said straight ramp module with said inclined surfaces of said first and second inclined ramp modules being in line, said ramp system including first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, connecting means for connecting said second inclined ramp module to said straight ramp module when in a stacked assembly, said inclined ramp modules having a generally resilient lip structure extending from the lower end of said inclined surfaces,

• said lip structure being of a preselected length to locate said lip structure of said second inclined ramp module proximate to the upper end of said inclined surface of said first inclined ramp module to provide a generally smooth transition between said inclined surfaces.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be located adjacent to one of said end walls of said straight ramp module for end-to-end assembly,

• the longitudinal length of said triangularly shaped side walls of said inclined ramp module and the longitudinal length of said straight ramp module being substantially the same and the transverse width of said inclined ramp module and said straight ramp module being substantially the same to facilitate location of said bottom side of said inclined ramp module in a stacked aligned location upon said planar support surface of said straight ramp module,
• said end wall of said inclined ramp module being substantially of the same size as said end walls of said straight ramp module to facilitate end-to-end location and alignment,
• said ramp system formed in a stacked relationship with a first said inclined ramp module at the entrance at the ground surface connected end-to-end with one said straight ramp module at the ground surface, and including a second inclined ramp module supported on said planar support surface on said straight ramp module with said inclined surfaces of said first and second inclined ramp modules being in line, said ramp system including first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove on said end wall of said inclined ramp module and on said one end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly matingly moved into said T-shaped channel groove on said one of said ramp modules, said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end,
• said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,
• said large protrusion section at the lower end of said T-shaped protrusion adapted to be in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit and with a peripheral gap at the upper ends of said T-shaped protrusion and said T-shaped channel groove,
• said T-shaped protrusion being open at its lower end,
• connecting means for connecting said second inclined ramp module to said straight ramp module when in a stacked assembly, said connecting means including a connector having an opening at its lower end, said opening adapted to fit over the upper end of the T-shaped protrusion on said straight ramp module,
• the upper end of said connector adapted to fit within the opening at the lower end of said T-shaped protrusion whereby said second inclined ramp module and said straight ramp module will be secured together in the stacked condition.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be located adjacent to one of said end walls of said straight ramp module for end-to-end assembly,

• the longitudinal length of said triangularly shaped side walls of said inclined ramp module and the longitudinal length of said straight ramp module being substantially the same and the transverse width of said inclined ramp module and said straight ramp module being substantially the same to facilitate location of said bottom side of said inclined ramp module in a stacked aligned location upon said planar support surface of said straight ramp module,
• said end wall of said inclined ramp module being substantially of the same size as said end walls of said straight ramp module to facilitate end-to-end location and alignment, said ramp system including a foot member which is a strip-like generally resilient structure adapted to be located on at least one of the edges including edges at said bottom side of said inclined ramp module and said bottom side of said straight module for contacting the ground surface to inhibit slippage,
• said edges including the edges of said lower extremities of said triangularly shaped side walls and the edges at said bottom portion of said some of said ribs of said inclined ramp module and the edges of said lower extremities of said rectangularly shaped side walls and the edges at said bottom portion of said some of said ribs of said straight ramp module,
• said foot member when applied to said at least one of the edges defining a channel portion when applied with side sections accepting said edges of varying thickness of said lower extremities of said triangularly shaped side walls of said inclined ramp module and said some of said ribs of said inclined ramp module and of said straight ramp module, said channel portion as applied having an opening at its upper end with said side sections being adapted to at least partially close said opening and adapted to be apart when said edges of said inclined ramp module and of said straight ramp module are moved into said channel portion and to close to grip said edges to retain said foot member to said at least one of said edges.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported on said planar support surface of another of said straight ramp modules in a stacked relationship, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, either one of said end walls at one end of said straight ramp module adapted to be secured to an end wall of another of said straight module for end-to-end assembly,

• first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove on said end wall of said inclined ramp module and on said end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly matingly moved into said T-shaped channel groove on said one of said ramp modules, said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end, said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,
• said large protrusion section at the lower end of said T-shaped protrusion adapted to be located in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported on said planar support surface of another of said straight ramp modules in a stacked relationship, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly, either one of said end walls at one end of said straight ramp module adapted to be secured to the opposite end wall of another of said straight module for end-to-end assembly, said ramp being formable in a stacked relationship with a first said inclined ramp module at the entrance at the ground surface connected end-to-end with one said straight ramp module at the ground surface, and including a second inclined ramp module supported on said planar support surface on said straight ramp module with said inclined surfaces of said first and second inclined ramp modules being in line, said ramp system including first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment, said first attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove on said end wall of said inclined ramp module and on said one end wall of said straight ramp module with the same spacing between each, said T-shaped protrusion on one of said ramp modules adapted to be slidingly, matingly moved into said T-shaped channel groove on another of said ramp modules with said T-shaped protrusion on said another of said ramp modules being slidingly matingly moved into said T-shaped channel groove on said one of said ramp modules, said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end,

• said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,
• said large protrusion section at the lower end of said T-shaped protrusion adapted to be located in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit and with a peripheral gap at the upper ends of said T-shaped protrusion and said T-shaped channel groove,
• said T-shaped protrusion being open at its lower end, connecting means for connecting said second inclined ramp module to said straight ramp module when in a stacked assembly, said connecting means including a generally T-shaped connector having a T-shaped opening at its lower end, said T-shaped opening adapted to fit over the upper end of the T-shaped protrusion on said straight ramp module,
• the upper end of said T-shaped connector adapted to fit within the opening at the lower end of said T-shaped protrusion whereby said second inclined ramp module and said straight ramp module will be secured together in the stacked condition.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising at least one ramp module of a configuration being an inclined ramp module being of a hollow construction with an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, said inclined ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to an end wall of another ramp module of a hollow construction for end-to-end assembly, attachment means for selectively connecting said inclined ramp module and said other ramp module for end-to-end alignment, said attachment means comprising at least one T-shaped protrusion integrally formed on said end wall of said inclined ramp module and an end wall of said other ramp module and at least one T-shaped channel groove integrally formed on said end wall of said inclined ramp module and the end wall of said other ramp module, said T-shaped protrusions adapted to be slidingly, matingly moved into said T-shaped channel grooves, said T-shaped protrusions having a generally hollow construction opening to the inside of said modules and being closed at the top.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising at least one ramp module of a configuration being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, said inclined ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to an end wall of another ramp module for end-to-end assembly, attachment means for selectively connecting said inclined ramp module and said other ramp module for end-to-end alignment, said attachment means comprising at least one T-shaped protrusion integrally formed on one of said end wall of said inclined ramp module and an end wall of said other ramp module and at least one T-shaped channel groove integrally formed on the other one of said end wall of said inclined ramp module and the end wall of said other ramp module, said T-shaped protrusion adapted to be slidingly, matingly moved into said T-shaped channel groove, said inclined ramp module being of a generally hollow structure with said triangularly shaped side walls and end wall being of a relatively thin wall thickness, the lower extremities of said triangularly shaped side walls and end wall defining the bottom side of said inclined ramp module, said upper support surface being substantially uniformly flat over its length, said inclined ramp module having a plurality of generally flat internal ribs extending longitudinally and transversely across the bottom of said flat upper support surface at spaced intervals with substantially no distortion of said flat upper support surface, at least some of said internal ribs having end sections with a bottom portion extending inwardly and downwardly to substantially the same location as the extremities of said triangularly shaped side walls and said end wall to provide further support for said flat upper surface and said walls and end wall of said inclined ramp module at said bottom side.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising at least one ramp module of a configuration being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, said inclined ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to an end wall of another ramp module for end-to-end assembly, attachment means for selectively connecting said inclined ramp module and said other ramp module for end-to-end alignment, said attachment means comprising at least one T-shaped protrusion integrally formed on one of said end wall of said inclined ramp module and an end wall of said other ramp module and at least one T-shaped channel groove integrally formed on the other one of said end wall of said inclined ramp module and the end wall of said other ramp module, said T-shaped protrusion adapted to be slidingly, matingly moved into said T-shaped channel groove, said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end, said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,

• said large protrusion section at the lower end of said T-shaped protrusion adapted to be located in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit.

A ramp system for forming ramp assemblies of selectively variable configurations for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising a plurality of ramp modules including at least one ramp module of a configuration being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length, said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface, said inclined ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to an end wall of another ramp module for end-to-end assembly, attachment means for selectively connecting said inclined ramp module and said other ramp module for end-to-end alignment, said attachment means comprising at least one first attachment structure integrally formed on one of said end wall of said inclined ramp module and on an end wall of said other ramp module and at least one second attachment structure integrally formed on the other one of said end wall of said inclined ramp module and the end wall of said other ramp module, said first and second attachment structures being of different interfitting constructions with said first attachment structure adapted to be engaged with said second attachment structure to lockingly secure said ramp modules together with said inclined ramp module being of a generally hollow structure with said triangularly shaped side walls and end wall being of a relatively thin wall thickness, the lower extremities of said triangularly shaped side walls and end wall defining the bottom side of said inclined ramp module, said upper support surface being substantially uniformly flat over its length, said inclined ramp module having a plurality of generally flat internal ribs extending longitudinally and transversely across the bottom of said flat upper support surface at spaced intervals with substantially no distortion of said flat upper support surface, at least some of said internal ribs having end sections with a bottom portion extending inwardly and downwardly to substantially the same location as the extremities of said triangularly shaped side walls and said end wall to provide further support for said flat upper support surface and said side walls and end wall of said inclined ramp module at said bottom side.

A ramp system for forming ramp assemblies for providing aerial lift to users of rideable wheeled recreational products including skates, skateboards and bicycles comprising ramp modules of at least two different configurations, one of said at least two ramp module configurations being an inclined ramp module having an inclined upper support surface supported on generally triangularly shaped side walls substantially over its length,

• said inclined ramp module having an end wall at one end of said side walls and at the upper end of said inclined surface,
• another of said at least two module configurations being a straight ramp module having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length,
• said straight ramp module having end walls at opposite ends of said side walls and said straight support surface, said inclined ramp module having a bottom side engageable with a ground surface and alternatively adapted to be supported upon said planar support surface of said straight ramp module in a stacked relationship, said straight ramp module having a bottom side engageable with a ground surface, said end wall of said inclined ramp module adapted to be secured to one of said end walls of said straight ramp module for end-to-end assembly,
• said ramp system being formable in a stacked relationship with a first said inclined ramp module at the entrance at the ground surface connected end-to-end with said straight ramp module at the ground surface, and including a second inclined ramp module supported on said planar support surface on said straight ramp module with said inclined surfaces of said first and second inclined ramp modules being in line,
• said ramp system including first attachment means for connecting selected ones of said inclined ramp modules and said straight ramp modules for end-to-end alignment,
• said ramp system including second attachment means for connecting said inclined ramp modules side-by-side and for connecting said straight ramp modules side-by-side,
• said second attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove on said side wall of said inclined ramp module and on said side wall of said straight ramp module with the same spacing between each,
• said T-shaped protrusion on said second inclined ramp module adapted to be in line with said T-shaped protrusion on said straight ramp module when supported on said upper support surface of said straight ramp module, said T-shaped protrusion on said another of said ramp modules being slidingly matingly movable into said T-shaped channel groove on said one of said ramp modules,
• said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end, said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end, said large protrusion section at the lower end of said T-shaped protrusion adapted to be located in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit and with a peripheral gap at the upper ends of said T-shaped protrusion and said T-shaped channel groove, said T-shaped protrusion being open at its lower end,
• connecting means for connecting said second inclined ramp module to said straight ramp module when in a stacked assembly, said connecting means including a connector having an opening at its lower end, said opening adapted to fit over the upper end of the T-shaped protrusion on said straight ramp module, the upper end of said connector adapted to fit within the opening at the lower end of said T-shaped protrusion on said second inclined ramp module whereby said second inclined ramp module and said straight ramp module will be secured together in the stacked condition.

A modular system for forming modular assemblies of selectively variable configurations for providing support to users comprising a plurality of straight modules each having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight modules having generally rectangularly shaped end walls at opposite ends of said side walls and said straight support surface, said straight modules each having a bottom side engageable with a ground surface, said end walls of said straight modules adapted to be secured to said end walls of another of said straight modules for end-to-end assembly, said side walls of said straight modules adapted to be secured to said side walls of another of said straight modules for side-by-side assembly, attachment means for selectively connecting said straight modules for end-to-end alignment and for side-by-side alignment, said attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove both integrally formed on said end walls and said side walls of said straight modules with the same spacing between each, said T-shaped protrusions on one of said straight modules adapted to be slidingly, matingly moved into said T-shaped channel grooves on another of said straight modules with said T-shaped protrusion on said another of said straight modules being slidingly, matingly moved into said T-shaped channel groove on said one of said straight modules, said T-shaped protrusion and said T-shaped channel groove being of a reverse tapered construction with said T-shaped protrusion partially engaging said T-shaped channel groove with a preselected close fit at their bottom surfaces when assembled.

A modular system for forming modular assemblies of selectively variable configurations for providing support to users comprising a plurality of straight modules each having a generally horizontal, planar upper support surface supported on generally rectangularly shaped side walls substantially over its length, said straight modules having generally rectangularly shaped end walls at opposite ends of said side walls and said straight support surface, said straight modules each having a bottom side engageable with a ground surface, said end walls of said straight modules adapted to be secured to said end walls of another of said straight modules for end-to-end assembly, said side walls of said straight modules adapted to be secured to side walls of another of said straight modules for side-by-side assembly, attachment means for selectively connecting said straight modules for end-to-end alignment and for side-by-side alignment, said attachment means comprising at least one T-shaped protrusion and at least one T-shaped channel groove both integrally formed on said end walls and said side walls of said straight modules with the same spacing between each, said T-shaped protrusions on one of said straight modules adapted to be slidingly, matingly moved into said T-shaped channel grooves on another of said straight modules with said T-shaped protrusion on said another of said straight modules being slidingly matingly moved into said T-shaped channel groove on said one of said straight modules,

• said T-shaped protrusions having a configuration tapering from a large protrusion section on its lower end to a small protrusion section at its upper end, said T-shaped channel groove having a configuration tapering from a small groove section at its lower end to a large groove section at its upper end,
• said large protrusion section at the lower end of said T-shaped protrusion adapted to be located in said small groove section at the lower end of said T-shaped channel groove with a relatively close tolerance fit.