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:
Aug. 24, 1999
Filed:
Mar. 11, 1997
Applicant:
Inventors:
James E Hart, Trafford, PA (US);
Angel P Bezos, Rockwood, MD (US);
Assignee:
Westinghouse Air Brake Company, Wilmerding, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137605 ; 137607 ; 137628 ; 251 612 ;
Abstract
A valve device for reducing the brake pipe pressure in a railroad train brake pipe at a location remote from a train locomotive including a pair of valves, a first valve to controllably vent brake pipe pressure from the brake pipe for purposes of service brake applications and a second valve to quickly vent brake pipe pressure from the brake pipe at a relatively high rate for purposes of emergency brake applications, and a pneumatic drive means to open the first valve in response to a controlled supply pressure and open the second valve in response to an emergency supply pressure.