The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 17, 1985
Filed:
Aug. 20, 1984
Applicant:
Inventors:
John R Reiss, N. Versailles, PA (US);
Richard Katz, Plum Borough, PA (US);
Assignee:
American Standard Inc., Wilmerding, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
303 74 ; 303 36 ;
Abstract
In a brake control valve device for railway vehicles in which a bias spring acts on the piston stack assembly of the valve device, an additional air reservoir and a differential check valve are arranged to assure proper full service brake pressure, when the control valve device is operated in a direct release mode, thereby overcoming the effect of the bias spring in producing a force balance to cause the piston stack assembly to assume a lap condition before full service brake pressure is achieved. The arrangement has no adverse effect when the control valve device is operated in a graduated release mode.