Patent ID: 9333961
Filing Date: 2016-05-10
CPC Classification: B60T,B61H,F16D

Claim Text:
1. A spring brake cylinder, having a housing in which a spring-loaded piston, loaded using at least one accumulator spring, with a piston rod is axially movable, and also having an emergency release device comprising an emergency release operating device, an emergency release mechanism with a toothed wheel for interrupting a force flux between spring-loaded piston and piston rod, and also having a retaining device which is designed for holding the emergency release device in different retained positions, wherein the retaining device has a locking pawl which can be pivoted into an engaged and disengaged position in relation to the toothed wheel, and the emergency release operating device has at least one operating element which is movable in relation to the housing and loaded in its initial position using a first return spring, and also having a driver which can be operated together with the operating element for driving the locking pawl in such a way that during an operation of the operating element the operating force is transmitted to the driver and from this transmitted to the locking pawl for transferring the locking pawl from an engaged position in relation to the toothed wheel into a disengaged position, wherein, between the operating element and the driver, or between the driver and the locking pawl, provision is made for a spring arrangement connected in parallel to the first return spring and during the driving of the locking pawl are compressed by the driver, creating a spring force which tensions the locking pawl in the position in which it is disengaged from the toothed wheel.