Patent ID: 9573639
Date: 2017-02-21
CPC Classifications: B62B,B62D

Claim:
1. A retractable wheel assembly, comprising: a support structure having bottom and side portions; a wheel having an axle; a wheel retraction assembly including a fixed strut connecting one end of the wheel axle to the support structure, and a telescopic strut connecting the opposite end of the wheel axle to the support structure; wherein one end of the fixed strut is fixedly mounted to the wheel axle and the other end is pivotally mounted to a side portion of the support structure; and wherein one end of the telescopic strut is fixedly mounted to the wheel axle and the other end is pivotally mounted to the bottom portion of the support structure, with the telescopic strut movable between retracted and expanded positions, wherein the retracted position maintains the wheel in an operative position with the struts positioned essentially perpendicular to the support structure to enable the support structure to be moved upon the first wheel to transport cargo that is placed on the support structure, while in the retracted position the wheel is placed in an inoperative position with the struts essentially parallel to the first support structure.