Patent ID: 9162791
Filing Date: 2015-10-20
Classification: A63J,B65D,B66D

Abstract:
1. A safety brake device capable of being mounted on to a shaft of a theatre hoist to prevent the uncontrolled release of a suspended load, said safety brake device comprising: an overrunning clutch having an inner race, an outer race, and said inner race having a first bore along a center-axis of said overrunning clutch to receive the shaft, said first bore of said inner race being a keyed bore that is dimensioned and configured for keyed attachment to said shaft such that said inner race rotates with the shaft when said inner race is keyed to the shaft; a torque disc fixedly attached to said outer race of said overrunning clutch, said torque disc having a first surface perpendicular to said center-axis, a second surface parallel to said first surface, and a second bore aligned with said center-axis, wherein the shaft has a diameter, wherein said second bore of said torque disc has a diameter greater than the diameter of the shaft to allow the shaft to extend through said second bore of said torque disc while said torque disc can rotate relative to the shaft when said inner race is keyed to the shaft, and wherein the shaft extends through said second bore of said torque disc when said inner race is keyed to the shaft; and a caliper assembly, wherein said caliper assembly comprises a first and second friction pad, wherein said caliper presses said first friction pad against said first surface of said torque disc and said second friction pad against said second surface of said torque disc.