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:
Jul. 04, 1989
Filed:
May. 26, 1988
Applicant:
Inventor:
Walter E Rojecki, Watertown, NY (US);
Assignee:
General Signal Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
303 227 ; 303 222 ;
Abstract
An empty-load valve device has a single housing competing coaxially a load sensing push rod, a load sensing piston, a ratio piston, a ratio valve and a spring for retracting the push rod to a normal position. The load sensing push rod actuates the ratio piston to open an equalizing valve to fill an equalizing volume from a control valve and to permit the ratio piston to limit brake cylinder pressure upon sensing an empty car.