Brake valve device arranged for electro-pneumatic control
AssigneeAmerican Standard Inc.
InventorsRichard F. Balukin, John R. Reiss, Frank J. Jerina
Life of this patent
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Abstract
An operators's brake valve device for a railway locomotive that is adapted to provide brake pipe recharging in a holding position of the brake valve handle in which the release of brake cylinder pressure is cut off by a release magnet valve device that, in conjunction with an appliction magnet valve device, provides electro-pneumatic control of the train brakes. These magnet valves are controlled electrically via pneumatically piloted electrical switches that receive discrete pressure signals according to the different positions of the brake valve handle.
Claims9
A brake valve device for charging a brake pipe to a certain chosen pressure and for venting said brake pipe, such charging and venting of said brake pipe effecting operation of a control valve device to admit fluid under pressure to a brake cylinder device and to release fluid under pressure from said brake cylinder device, such release of fluid under pressure from said brake cylinder device being controlled via electro-pneumatic means in series with said control valve device, said brake valve device comprising:
- (a) means for selecting different operating conditions of said brake valve device including a Release condition and a Holding condition;
- (b) a first passageway having discrete pressure states;
- (c) suppression valve means operative for effecting one discrete pressure state of said first passageway in said Release condition of said brake valve device and for effecting another discrete pressure state in said Holding condition of said brake valve device;
- and
- (d) first pressure switch means operative in response to said other pressure state of said first passageway for effecting operation of said electro-pneumatic means such as to cut off said release of fluid under pressure from said brake cylinder device.
Dependencies are inferred from the claim text.