Chock for castor wheels of trolley - has triangular body placed against non rotary wheels to hold them at three points

摘要

The wheel chock is for a trolley (2) with two pivoting and two non-pivoting (4) wheels. It locks the two non-pivoting wheels and due to the angled surfaces of the triangular chocks (3) immobilises the wheels at three points, due to the deformation of these surfaces under the weight of the trolley. To aid fitting of the chock to the trolley wheels, a pivoting flap is attached at the gap between the two chocks, to allow sliding into place.