Patent ID: 6491141
Filing Date: 2002-12-10
Classification: B60T,B61H,F16D

Abstract:
A brake actuator for delivering a brake force through a braking element to a vehicle being braked, comprising in combination: a housing, a service brake arrangement within said housing, an associated safety brake arrangement mounted within the housing operable from at least one powerful safety brake spring for actuating the safety brake arrangement, a means for compressing the safety brake spring during a service brake application, a mechanical locking means for locking the safety brake spring to the housing in a non-braking compressed state, a safety brake spring unlocking means for releasing at will the mechanical locking means from the compressed state to reside in a decompressed state thereby accomplishing a safety brake application in response to decompression of said safety brake spring, and electric motor driven means for actuating the unlocking means thereby to apply the service brake.