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:
Feb. 28, 1978
Filed:
Aug. 18, 1976
Applicant:
Inventor:
Charles Horowitz, Niles, IL (US);
Assignee:
Sloan Valve Company, Franklin Park, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
303 50 ; 13762527 ; 303 71 ; 303 / ;
Abstract
A tractor-trailer parking control valve includes a spring-biased valve member movable within a chamber to control communication between a spring brake chamber port and an exhaust port and the spring brake chamber port and a source of fluid pressure. In a second chamber within the control valve housing is a two-way check valve which controls the supply of pressure from one of two reservoirs to the chamber of the spring-biased valve member.