Portable and collapsible dolly and track

A system for movably supporting a camera tripod, comprising:

• a. a collapsible track assembly, including a pair of elongated longitudinal and parallel rails arranged in a spaced-apart relationship;
• b. each one of said pair of rails including a hollow cylindrical end tube with a smooth exterior surface and a smooth interior surface, and a multiplicity of hollow cylindrical connection tubes each having a smooth exterior surface and a proximal end portion with a knurled interior surface and a distal end portion with a smooth interior surface;
• c. a multiplicity of connecting joints each having a proximal half portion with a smooth exterior surface and a distal half portion with a knurled exterior surface, each connecting joint attached to said proximal end portion of said each connection tube, where the hurled exterior surface of the distal half portion of the connecting joint intermeshes with said knurled interior surface of said proximal end portion of said each connection tube, and the proximal half portion is ready to be slidably inserted coaxially within said distal end portion of an adjacent one of said of hollow cylindrical tubes to thereby form said each rail;
• d. a multiplicity of mounting tabs mounted to selected ones of said hollow cylindrical tubes, each mounting tab transversely protruding inwardly and located adjacent to said proximal end portion of a respective one of the selected ones of said cylindrical tubes, where the mounting tabs on one of said pair of rails are aligned with the mounting tabs on the other one of said pair of rails;
• e. a multiplicity of transverse braces, each transverse brace having opposite ends hingeably connected to two aligned ones of said mounting tabs mounted on said two parallel rails for interconnecting the selected ones of said hollow cylindrical tubes to form said parallel rails, whereas when said tubes are disassembled, said braces can be rotated into a parallel relationship with said tubes to collapse said pair of parallel rails in a folded condition;
• f. an elongated elastic cord extending inside said each rail for retaining said hollow cylindrical tubes together;
• and
• g. a dolly assembly movably carried on said pair of parallel rails;
• h. whereby said track assembly can be assembled to movably carry said dolly assembly for supporting said tripod, or disassembled when not in use for easy storage or transportation.

A system for movably carrying a dolly assembly which supports a camera tripod, comprising:

• a. a collapsible track assembly, including a pair of elongated longitudinal and parallel rails arranged in a spaced-apart relationship;
• b. each one of said pair of rails including a multiplicity of hollow cylindrical tubes each having a smooth exterior surface;
• c. means for collapsibly interconnecting said hollow cylindrical tubes to form said parallel rails;
• d. means for collapsibly interconnecting said two parallel rails in a parallel relationship;
• and
• e. means for retaining said hollow cylindrical tubes together, wherein said means for retaining said hollow cylindrical tubes comprises an elastic cord extending inside said each rail;
• f. whereby said track assembly can be assembled to movably carry said dolly assembly for supporting said tripod, or disassembled when not in use for easy storage or transportation.

A dolly assembly for movably supporting a camera tripod, comprising:

• a. a longitudinal hollow cylindrical bar and a transverse hollow cylindrical bar;
• b. each cylindrical bar having a multiplicity of holes for selectively receiving the feet of said tripod;
• c. two wheels carded at opposite ends of said longitudinal bar;
• d. a T-shaped adapter mounted on said longitudinal bar;
• e. said transverse bar detachably connected to said T-shaped adapter at one end and carrying a wheel at an other end, forming a T-shaped dolly;
• and
• f. said transverse bar having a protruding connection located on the circumferential sidewall, whereas when said proximal end of said transverse bar is detached from said T-shaped adaptor, the protruding connection can be attached thereon to place said transverse bar in a parallel relationship with said longitudinal bar when said dolly assembly is not in use;
• g. whereby said dolly assembly can be assembled to movably ride on said rails for supporting said tripod, or disassembled when not in use for easy storage or transportation.

A dolly assembly for movably supporting a camera tripod, comprising:

• a. two longitudinal hollow cylindrical bars and one transverse hollow cylindrical bar;
• b. each cylindrical bar having a multiplicity of holes for selectively receiving the feet of said tripod;
• c. two wheels carried at opposite ends of each said longitudinal bar;
• d. a T-shaped adapter mounted at a middle portion of each said longitudinal bar;
• e. said opposite ends of said transverse bar detachably connected to said T-shaped adapters, forming an H-shaped dolly;
• and
• f. said transverse bar having two opposite protruding connections located on the circumferential sidewall, whereas when said opposite ends of said transverse bar are detached from said T-shaped adapters, the protruding connections can be attached thereon to place said transverse bar in a parallel relationship with said two longitudinal bars when said dolly assembly is not in use;
• g. whereby said dolly assembly can be assembled to movably ride on said rails for supporting said tripod, or disassembled when not in use for easy storage or transportation.

A dolly assembly for movably supporting a camera tripod, comprising:

• a. a longitudinal bar and a transverse bar, each bar having means for receiving a foot of said tripod;
• b. two wheels carried at opposite ends of said longitudinal bar;
• c. a T-shaped adapter mounted on said longitudinal bar;
• and
• d. said transverse bar detachably connected to said T-shaped adapter at one end and carrying a wheel at the other end, forming a T-shaped dolly;
• e. whereby said dolly assembly can be assembled to movably ride on said rails for supporting said tripod.