A safety mechanism for a lift system is provided. The safety mechanism includes a first motion retarder which operates frictionally between a load-carrying platform and a hoistway, and a second motion retarder which operates by breaking a frangible element. The two motion retarders may act together so that when the frictionally engaging element is depleted, the frangible elements are then broken. In an embodiment, the frictional element is disengaged to engage the breaking of the frangible elements when the car is a predetermined distance above a floor of the hoistway, thereby ensuring that the load-carrying platform can be stopped prior to a collision with the floor or ceiling of the hoistway.
Lift safety mechanism
2015-04-08
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |