Randell HD HNG0501

HINGE COUNTER BALANCE CB251

Counter balances or counter weights are commonly used the automatic door closing mechanism of commercial refrigerators and freezers, and product merchandisers. Most commonly, equipment utilizing a counterbalance will feature a sliding door. The function of the counterbalance is to enable the weight to close the door under the natural force of gravity. Similarly, counterwieghts may be used to keep a mechanism in balance as in a scale, or to assist in moving another part of the equipment as in an assisted lifting mechanism.

A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation: all other translations or rotations being prevented, and thus a hinge has one degree of freedom. Hinges may be made of flexible material or of moving components. In biology, many joints function as hinges like the elbow joint.