Patent ID: 8028811
Filing Date: 2011-10-04
Classification: B60T

Abstract:
1. A process for releasing at least one spring accumulator brake, which is operated by a pressure medium, wherein in normal operation, said at least one brake is connected through a switch organ to a control valve and subsequently to a pump of a brake-release-pressure-supply-circuit for release of the brake by a brake release pressure, and wherein in service operation when the brake release pressure fails, said at least one brake is separated from the circuit by the operation of said switch organ and is released through an auxiliary pressure medium source, characterized in that said switch organ is further connected to said pump by a branch line that bypasses said control valve of the circuit and provides a direct connection between said pump and said switch organ, the process comprising: wherein when the brake release pressure is provided by said pump after a service operation, a pressurized hydraulic fluid is delivered directly from said pump to said switch organ through said branch line to provide automatic restoration of said switch organ, independent of said control valve of said circuit, thereby resulting in automatic reconnection of said at least one brake to said circuit.