Abstract: A frame has a wheel assembly that can move up or down. A linkage extends between a catch to the wheel assembly and a grip on the frame, so the wheel assembly can be released for vertical movement with respect to the channel. A tray affixed to the frame near the bottom of the channel can receive a panel when the wheel assembly is at an upper position. Then, the frame and panel can be briefly lifted off the ground. The linkage can be activated to release the catch so the wheel assembly drops and is secured by the catch in a lower position, resulting in the wheel's protrusion below the bottom of the frame. This causes the weight of the device and the panel to be borne on the wheel, so the panel can be wheeled around the jobsite by one person.

Abstract: A shopping cart with a vertically extended anti-theft pole. The pole is mounted to the cart using a one-way interlock, that allows the pole to be mounted to the cart on premises, but not easily removed without damaging or tampering with the interlock. In this way, the carts may be brought into premises of interest, and equipped with the anti-theft device after delivery/deployment without any tools, skilled labour, or fasteners.