Brakes – Wheel – Axially movable brake element or housing therefor
Reexamination Certificate
2007-03-13
2007-03-13
Schwartz, Chris (Department: 3683)
Brakes
Wheel
Axially movable brake element or housing therefor
Reexamination Certificate
active
11054347
ABSTRACT:
In an automotive vehicle braking system, a hydraulic brake actuator includes a wedge for locking a hydraulic piston in a brake position for purposes of applying a park brake. To apply the park brake, hydraulic pressure is increased to advance the piston to urge the brake pads against the rotor. With the piston in the brake position, an electrical solenoid is energized to advance the wedge to engage the piston. The wedge includes an inclined surface that contacts an inclined surface connected to the piston or the housing, with sufficient frictional force to maintain the wedge in the advanced position without requiring hydraulic pressure or electrical power. Thus, the park brake remains applied even when the vehicle is turned off.
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Fulks Gary C.
Reuter David F.
Delphi Technologies Inc.
McBain Scott A.
Schwartz Chris
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