Mobile cart with retractable wheel assembly

摘要

A mobile cart having a retractable wheel assembly. A control rod engages the gear mechanisms coupled to the deployment rods. As the control rod engages the gear mechanisms, the gear mechanisms rotate the deployment rods between a deployed state and a retracted state. The ends of the deployment rods that are located within each wheel base push against the top portion of each wheel housing, thereby pushing each wheel housing out and away from the wheel bases so that the mobile cart may be pushed on the exposed wheels.

主权项

1. A mobile cart comprising:
a frame; at least one retractable wheel base assembly coupled to a base of the frame, wherein the retractable wheel base assembly comprises:
a wheel base;a wheel housing movably coupled to the wheel base; anda plurality of wheels coupled within the wheel housing; a gear mechanism for deploying and retracting the wheel housing relative to the wheel base; at least one deployment rod coupled to the base of the frame, wherein the gear mechanism is coupled along a length of the deployment rod, wherein the deployment rod comprises:
an elongated body; andat least one rectangular end coupled to the elongated body and positioned within the wheel base;wherein the deployment rod is in a retracted position when a wide surface of the rectangular end is positioned flat against a top portion of the wheel housing;wherein the deployment rod is in a deployed position when a narrow surface of the rectangular end is positioned flat against a top portion of the wheel housing; and a control rod coupled to the frame, wherein the control rod has a plurality of teeth that engage the near mechanism to move the deployment rod between a deployed position and a retracted position.