Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1996-05-06
1998-08-04
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
13759617, 303 33, B60T 836
Patent
active
057883432
ABSTRACT:
A brake valve assembly suitable for use in a railway air brake system to control flow of air between the on-board reservoir and a respective brake cylinder. The valve assembly may include a plurality of internal valves to permit three states of fluid transfer, i.e., delivery, exhaust and lap. The internal valves are controlled by respective solenoids that act directly on the valve element. Internal forces due to fluid pressure are balanced using counterbalance assemblies preferably including a flexible, rolling diaphragm disposed adjacent to a configured follower member. The counterbalance assemblies maintain substantial balance throughout the reciprocative stroke of the valve element.
REFERENCES:
patent: 2826215 (1958-03-01), Wolfslau et al.
patent: 3566920 (1971-03-01), Stewart
patent: 3944287 (1976-03-01), Hagase
patent: 5050642 (1991-09-01), Bright
patent: 5429426 (1995-07-01), Hart
patent: 5454399 (1995-10-01), Kazakis et al.
A publication by Westcode, Inc. entitled, "Westcode: Direct Acting Magnet Valve".
A publication by WABCO, Passenger Transit Division entitled, "N-7-D Magnet Valve," dated Mar. 1989.
A publication by WABCO (Westinghouse Air Brake Division), entitled "N-8-E Magnet Valve Portion," dated Dec. 1984.
A publication by WABCO (Westinghouse Air Brake Company), Passenger Transit Division, entitled "D-1 Decelostat.RTM. Unit: Part Number 673271 (with connector); 673270 (without connector)," dated Jan. 1991.
A publication by WABCO (Westinghouse Air Brake Company), Passenger Transit Division, entitled "D-1 Decelostat.RTM. Unit: Part No. 0675849," dated Mar. 1994.
Brillant Daniel
Griffin Scott N.
Kurtz Ronald C.
Oberleitner Robert J.
Schwartz Chris
Westinghouse Air Brake Company
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