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:
Mar. 06, 1979
Filed:
Apr. 04, 1977
Applicant:
Inventors:
Masaaki Saito, Yokosuka, JP;
Akihiro Ohnishi, Kitamoto, JP;
Assignee:
Nissan Motor Company, Limited, Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
1231 / ; 1376275 ;
Abstract
Two thermally operated control valves which, in cooperation with each other, admit into the vacuum chamber of the diaphragm unit for the EGR control valve atmospheric air only during cold engine operation, both atmospheric air and engine suction vacuum during engine warming-up operation, and engine suction vacuum only during engine normal operation.