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:
May. 05, 1987
Filed:
May. 30, 1985
Applicant:
Inventor:
John E Cook, Chatham, CA;
Assignee:
Canadian Fram Limited, Chatham, CA;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
25112907 ; 25112917 ; 251282 ; 123568 ; 123571 ;
Abstract
An EGR valve for an engine comprising: a housing including a plurality of passages for communicating exhaust gas and engine vacuum thereto, for supporting a movable diaphragm-piston assembly, a diaphragm-piston assembly for dividing the housing into an atmospheric chamber and a vacuum chamber, including a user cleanable, outwardly movable valve closure element for selectively sealing one of said passages and means for sensing the position of the assembly.