초록 ▼

A hand truck or cart has a frame with telescopic segments and wheels mounted to a lower end of the frame for maneuvering the frame on a support surface. The frame has an extended position for operational use and a collapsed position for storage purposes. When the frame is in the collapsed position,

A hand truck or cart has a frame with telescopic segments and wheels mounted to a lower end of the frame for maneuvering the frame on a support surface. The frame has an extended position for operational use and a collapsed position for storage purposes. When the frame is in the collapsed position, it has a vertical height that is only a fraction of its height when in the extended position. Each of the telescopic arms have locking elements for securing the frame in the extended position. The cart also has pivotable support and fork platform for supporting the loads. The support platform can be raised and lowered along the length of the frame with a winch assembly that is mounted to the frame. The cart is also provided with a pair of supplemental support legs for providing additional support for the frame.

대표청구항 ▼

1. A cart, comprising:a frame having a handle and a plurality of telescopic members for movement between an extended position such that the telescopic members are deployed, and a collapsed position such that the telescopic members are retracted;a plurality of wheels mounted to a lower end of the fra

1. A cart, comprising:a frame having a handle and a plurality of telescopic members for movement between an extended position such that the telescopic members are deployed, and a collapsed position such that the telescopic members are retracted;a plurality of wheels mounted to a lower end of the frame for maneuvering the frame on a support surface;a support platform mounted to the frame adjacent to the wheels and adapted to support a load placed thereon, the support platform being pivotable relative to the frame between a support position such that the frame is supported in an upright position on the support surface for operational use, and a storage position such that the support platform is folded against the frame for storage purposes; anda winch assembly centrally mounted to the handle of the frame relative to the telescopic members and having a cable assembly that is secured to the support platform for moving the support platform vertically relative to the frame; andsupport legs mounted to the frame, the support legs having wheels mounted to lower ends thereof for providing additional support and mobility for the frame on the support surface, the support legs being mounted to a rear portion of the frame and are pivotable and telescopically movable between a refracted position adjacent to the frame and an extended position.2. The cart of claim 1, wherein the plurality of telescopic members comprises four symmetrical sets of telescopic arm segments, such that each set, other than a lowermost set, is positionable within a set located inunediately below said each set when the frame is in the collapsed position.3. The cart of claim 1, further comprising a plurality of locking elements mounted to the telescopic members for securing the frame in either the extended position or in the collapsed position, wherein the locking elements comprise detents for engaging and disengaging adjacent ones of the plurality of telescopic members.4. The cart of claim 1, further comprising a support fork pivotally mounted to the frame adjacent to the support platform and adapted to support a load placed thereon during operational use, wherein the support platform is vertically movable relative to the support fork, and the support fork having a storage position such that the support fork is folded against the frame for storage purposes.5. A cart, comprising:a frame having a plurality of telescopic members for movement between an extended position such that the telescopic members are deployed for operational use, and a collapsed position such that the telescopic members are retracted for storage purposes, and, when the frame is in the collapsed position, the frame has a vertical height that is approximately one-third of a height of the frame when in the extended position;a plurality of locking elements mounted to the telescopic members for securing the frame in either the extended position or in the collapsed position;a plurality of wheels mounted to a lower end of the frame for maneuvering the frame on a support surface;a support platform mounted to the frame adjacent to the wheels and adapted to support a load placed thereon, the support platform being pivotable relative to the frame between a support position such that the frame is supported in an upright position on the support surface during operational use, and a storage position such that the support platform is folded against the frame for storage purposes;a winch assembly centrally mounted to the frame relative to the telescopic members and having a cable assembly that is secured to the support platform for moving the support platform vertically relative to the frame;a support fork mounted to the frame adjacent to the support platform and adapted to support a load placed thereon, the support fork being pivotable relative to the frame and the support platform between a support position such that the frame is supported in an upright position on the support surface for operational use, and a storage position such that the support fork is folded against the frame for storage purposes; andsupport legs movably mounted to the frame, each of the support legs having a wheel mounted thereto for providing additional support and mobility for the frame on the support surface.6. The cart of claim 5, wherein the plurality of telescopic members comprises four symmetrical sets of telescopic arm segments, such that each set is positionable within a set located immediately below said each set, other than a lowermost set, when the frame is in the collapsed position.7. The cart of claim 5, wherein the locking elements comprise detents for engaging and disengaging adjacent ones of the plurality of telescopic members.8. The cart of claim 5, wherein the support legs are mounted to a rear portion of the frame and are pivotable and telescopically movable between a refracted position adjacent to the frame and an extended position for engaging the support surface.9. The cart of claim 5, wherein the support platform is located in the support fork and is substantially co-planar with the fork, and wherein the frame has a handle and the winch assembly is mounted to the handle.