A jack screw locking device is provided. The jack screw locking device has a general L-shape defined by a key arm and a lock arm. The lock arm provides a lock slot and the key arm provides a key notch. The former is for operatively associating with a scissor jack's jack screw nut in a locked engagement when the key arm is slid between a fork portion of the scissor jack framing, thereby preventing rotation about torque axis of the jack screw nut. In conditions where the jack screw starts unwinding immediately upon removing the crank, the key notch can be used to engage the same jack screw nut in a holding position prior to the crank being removed, thereby temporarily holding the jack screw in order to effectuate the locked engagement via a second jack screw locking device.
DEVICE TO HOLD AND LOCK A SCISSOR JACK SCREW FROM LOOSENING AFTER TIGHTENING
2019-11-28
Patent
Electronic Resource
English
IPC: | B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last |