| 摘要 |
The present invention provides a multi-use move, lift and support device, which in the illustrative embodiment is a combination hand truck, dolly and step ladder device. The combination device includes a hand truck frame and a step ladder frame that are pivotally attached to one another. A support plate is pivotally mounted to the hand truck support frame at a distal end thereof, and is configured to secure the hand truck frame and the step ladder frame together when in either an upright or lowered position, and can be positioned to release the hand truck frame from the step ladder frame. A step assembly comprising a plurality of steps that are pivotally mounted to the step ladder frame, and can be rotated and secured to the hand truck frame in a horizontal position to provide steps. The top step of the step assembly is secured to a cross member of the hand truck frame so as to lock the hand truck frame and the step ladder frame into a substantially fixed relationship to one another in a step ladder configuration. In a dolly configuration, the hand truck frame becomes the handle for the dolly, and is held in place by a support bar that pivotally attaches to the hand truck frame and secures to the step ladder frame. The combination device of the present invention further includes a detachable crate for use in the hand truck configuration, a detachable seat for use in the step ladder configuration, and a tray for use in either the step ladder or dolly configurations.
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