Fluid-pressure and analogous brake systems – Automatic – Equalizing valves
Patent
1994-03-31
1995-07-04
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Automatic
Equalizing valves
303 7, 303 40, 303DIG2, B60T 1522
Patent
active
054294266
ABSTRACT:
A relay valve device for a relayed type brake system in which the compressed air of the auxiliary reservoir is connected to an equalizing reservoir instead of directly to the brake cylinder, as in a conventional system. Since the equalizing reservoir volume is fixed, as compared to the brake cylinder volume which varies with piston displacement, the equalizing reservoir volume must be greater than the final brake cylinder volume in order to obtain a full equalization pressure that matches the full service application pressure in a conventional brake system. The relay valve device employs a control piston that is subject opposingly to the equalizing reservoir pressure and the effective brake cylinder pressure delivered by the relay valve device. A differential pressure area of the control piston is selected in accordance with the volumetric ratio between the auxiliary and equalizing reservoirs so that the buildup of brake pressure substantially matches the conventional system partial application pressures, as well as full equalization pressure. A bias spring acts on the control piston to delay its actuation so as to cause the relayed pressure buildup to correspond in time to the conventional system brake pressure buildup.
REFERENCES:
patent: 3443839 (1969-05-01), Hinrichs et al.
patent: 3443841 (1969-05-01), Kobnick
patent: 3597013 (1971-08-01), Shah
patent: 4586755 (1986-05-01), Worbois
Falce Gary J.
Muratori Alfred
Oberleitner Robert J.
Westinghouse Air Brake Company
LandOfFree
Brake cylinder pressure relay valve for railroad freight car does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Brake cylinder pressure relay valve for railroad freight car, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Brake cylinder pressure relay valve for railroad freight car will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-756062