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:
Sep. 04, 1979
Filed:
Aug. 08, 1977
Applicant:
Inventors:
Minoru Yamanaka, Toyota, JP;
Yasuhiro Kawabata, Anjo, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Aichi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
137103 ; 1376275 ; 137D / ; 60290 ; 1231 / ;
Abstract
A vacuum cut-off valve for cutting off vacuum communication between an inlet port and an outlet port when the inlet vacuum increases above a predetermined vacuum level so that the outlet vacuum is maintained at a constant predetermined vacuum level. When the valve cutting operation between the inlet port and the outlet port is insufficient and vacuum leakage results, atmospheric pressure is admitted to the outlet port to thereby maintain the outlet vacuum at the constant predetermined level.