US 2021/0371244 A1 · DEVICES FOR ACTIVATING ELEVATOR SAFETY BRAKES

Abstract

Elevator systems utilize safety mechanisms with brakes that engage guide rails when an elevator car limit speed is exceeded or when a free-fall condition is detected. A device may be employed in such elevator systems to simultaneously activate the safety mechanisms and vastly decrease the likelihood that failure of the members connecting one safety mechanism will render other safety mechanisms inoperative. The device may generally include a rotatable central member that is configured to be coupled to a governor assembly of an elevator system. The device may also generally include linkages that connect the central member in parallel to the safety mechanisms. When the governor assembly is activated and exerts an activation force at the central member, the central member rotates to simultaneously activate the safety mechanisms and engage brakes of the safety mechanisms with the guide rails.

Claims20

Dependent claims

An elevator system comprising:

guide rails;
an elevator car that travels along the guide rails;
a governor assembly comprising a governor rope;
safety mechanisms attached to the elevator car;
and
a device for activating the safety mechanisms, the device comprising:
a central member disposed beneath the elevator car, and
linkages that couple the safety mechanisms in parallel to the central member, wherein the central member, the linkages, and the safety mechanisms are configured such that rotation of the central member causes simultaneous activation of the safety mechanisms.

5 more elements

A device comprising:

a central member;
and
linkages configured to couple in parallel the central member to safety mechanisms such that rotation of the central member causes activation of the safety mechanisms, wherein the central member is configured to activate a first of the safety mechanisms independent of the integrity of a connection between the central member and a second of the safety mechanisms, wherein the central member is configured to activate the second of the safety mechanisms independent of the integrity of a connection between the central member and the first of the safety mechanisms.

Dependencies are inferred from the claim text.

Devices for activating elevator safety brakes

Life of this patent

Devices for activating elevator safety brakes

Life of this patent

Abstract

Claims20