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US 8,282,111 B2Granted
Cart with movable platform
AssigneesMagline, Inc., Swift Water Logistics, Inc.
InventorsBruce L. Hailston, Andrew P. Richard
Life of this patent
Estimating the term…
Abstract
A cart may include a frame, a plurality of wheels carried by the frame, a platform movably carried by the frame, and a lift assembly. The lift assembly may be carried at least in part by the frame and operably associated with the platform to move the platform relative to the frame. The lift assembly may include at least one hydraulic actuator having a piston rod movable under hydraulic pressure to move the platform relative to the frame.
Claims27
A cart, comprising:
- a frame;
- a plurality of wheels carried by the frame;
- a pallet support platform movably carried by the frame;
- a lift actuator carried at least in part by the frame and operably associated with the platform to move the platform up and down relative to the frame;
- said platform including one or more pallet retention features adapted to be engaged by a pallet disposed on the platform to limit relative sliding movement of the pallet;
- a guide assembly including guide members carried by the frame and guided members carried by the platform for movement relative to the guide members, the guided members being rotatably movable relative to the guide members to reduce the tendency for the guided members to bind against the guide members during movement of the platform relative to the frame;
- a linkage interconnecting the frame and the platform to distribute the force provided on the platform by the lift actuator to at least two spaced apart locations on the platform;
- and
- the linkage further includes first and second link sets with each link set having upper links connected to the platform and lower links connected to the frame, the upper links and lower links being connected together at a pivot, and the linkage also includes a center link interconnecting the first and second link sets.
6 more elements
A cart, comprising:
- a frame formed of side support members and platform support members secured thereto and extending outwardly therefrom to provide frame sides which define the width of said frame from side to side, and to provide an open framework platform support;
- said platform support members deviating inwardly for a portion of the distance along the length of said frame sides;
- a pair of forward wheels, a pair of middle wheels, and a pair of rear swivel mounted wheels carried by said frame;
- said pair of middle wheels being larger in diameter than said pairs of front and rear wheels, and being located in said inward deviations in said platform sides, whereby said middle wheels are located generally within the width of said frame in order to keep said cart compact from side to side;
- said front and rear wheels being smaller in diameter than said middle wheels, whereby they are located generally below said frame, between said platform sides;
- said front and rear wheels also being positioned such that said front wheels are elevated above the ground when said middle and rear wheels engage the ground, allowing the cart to be pivoted on said middle wheels and said rear swivel wheels for convenient mobility;
- an open framework platform movably carried by the frame;
- said open framework platform being defined by side frame members joined by cross members, leaving openings in said platform;
- a lift actuator carried at least in part by the frame and operably associated with the platform to move the platform up and down relative to the frame.
6 more elements
A cart, comprising:
- a frame formed of side support members and platform support members secured thereto and extending outwardly therefrom to define the width of said frame, and to provide an open framework platform support;
- a plurality of wheels carried by said frame;
- an open framework platform movably carried by the frame;
- said open framework platform being defined by side frame members joined by cross members, leaving openings in said platform;
- a lift actuator carried at least in part by the frame and operably associated with the platform to move the platform up and down relative to the frame;
- said platform openings providing one or more pallet retention features adapted to be engaged by a pallet disposed on the platform to limit relative sliding movement of the pallet;
- a guide assembly including guide members carried by the frame and guided members carried by the platform for movement relative to the guide members, the guided members being rotatably movable relative to the guide members to reduce the tendency for the guided members to bind against the guide members during movement of the platform relative to the frame;
- a linkage interconnecting the frame and the platform to distribute the force provided on the platform by the lift actuator to at least two spaced apart locations on the platform;
- and
- the linkage includes first and second link sets with each link set having upper links connected to the platform and lower links connected to the frame, the upper links and lower links being connected together at a pivot, and the linkage also includes a center link interconnecting the first and second link sets.
7 more elements
A cart and pallet combination, said pallet having downwardly depending side legs having an inside width therebetween, said cart comprising:
- a frame;
- a plurality of wheels carried by the frame;
- an open framework platform movably carried by the frame;
- said open framework platform being defined by side frame members joined by cross members, leaving openings in said platform;
- a lift assembly carried at least in part by said frame and operably associated with said platform to move the platform relative to the frame, the lift assembly including at least one actuator movable to move the platform upwardly and downwardly relative to said frame;
- said frame and said platform having approximately the same width from side to side, said width being slightly narrower than said inside width between said pallet legs;
- a guide assembly including guide members carried by the frame and guided members carried by the platform for movement relative to the guide members, the guided members being rotatably movable relative to the guide members to reduce the tendency for the guided members to bind against the guide members during movement of the platform relative to the frame;
- a linkage interconnected to the frame and the platform to distribute the force provided on the platform by the lift actuator to at least two spaced apart locations on the platform;
- and
- the linkage includes first and second link sets with each link set having upper links connected to the platform and lower links connected to the frame, the upper links and lower links being connected together at a pivot, and linkage also includes a center link interconnecting the first and second link sets.
7 more elements
Dependencies are inferred from the claim text.