Self-Adjusting Caster Leg
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
A self-adjusting caster leg is disclosed which pivots down to contact the floor and support the outer end of a drawer or machine component as it is pulled out for access. The distance that the leg must pivot to contact the floor varies, depending on the mounting height of the machine legs. In order to avoid manual adjustment, the caster leg pivot shaft rotation is constricted by a coil-spring one-way clutch. Thus the caster leg is permitted to freely pivot downward until it touches the floor, in which position it supports the weight of the drawer or component as the one-way clutch prevents contra-rotation. A pawl and ratchet mechanism is deployed as a fail-safe back-up support. As the drawer is returned to its operating position the spring clutch is automatically released and the leg is cammed up into its storage position.