Manual brake release mechanism for rail vehicles

摘要

A spring-biased lever arm mechanism for operating an operating lever of a parking brake release mechanism. The lever arm mechanism includes a lever arm mounted on a pivot pin, a torsion spring disposed on the pivot pin, and first and second cable release mechanism. A manually operated parking brake release mechanism is also provided for a railway vehicle including a brake actuator, an operating lever associated with the brake actuator to manually release an applied braking force, and the spring-biased lever arm mechanism for operating the operating lever.

主权项

1. A spring-biased lever arm mechanism for operating an operating lever of a parking brake release mechanism, comprising:
a lever arm mounted on a pivot pin, said lever arm comprising a front appendage portion in engagement with the operating lever, a rear appendage portion, and a notch defined in one side of the lever arm between a pair of notch elements; a torsion spring disposed on the pivot pin; a first cable release mechanism comprising a first release cable having one terminal end with a first operator handle connected thereto and an opposing terminal end connected to the lever arm proximal of the front appendage portion; and a second cable release mechanism comprising a second release cable having one terminal end with a second operator handle connected thereto and an opposing terminal end connected to the rear appendage portion of the lever arm, wherein application of a pulling force to the first operator handle or the second operator handle causes pivotal movement of the lever arm on the pivot pin and stores energy in the torsion spring, and release of the first operator handle or the second operator handle automatically returns the lever arm to a neutral position.