Brakes – Operators – Fluid pressure
Reexamination Certificate
2007-07-31
2007-07-31
King, Bradley (Department: 3683)
Brakes
Operators
Fluid pressure
C188S033000, C188S265000, C303S089000
Reexamination Certificate
active
10752543
ABSTRACT:
An actuator responsive to fluid signals to retract and extend a piston. The actuator includes a cylinder and a pressure piston carried inside the cylinder. Also included is a shaft, and a rod connected to the pressure piston. The actuator further includes a first port for receiving a fluid pressure to move the pressure piston to a first position. The actuator also has a locking mechanism. The locking mechanism has a first and second surface, and both surfaces are movable in response to the fluid pressure at the first port. The surfaces lock the pressure piston in a first position upon removal of the fluid pressure at the first port.
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“Evaluation of a Hydraulic Freight-Car Parking Brake”, Paul B. McMahan, Technology Digest, Aug. 1998.
Huber, Jr. Howard E.
Neulieb Robert L.
Newton Steven R.
Sauter Jeffrey F.
Barnes & Thornburg LLP
King Bradley
New York Air Brake Corporation
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