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:
Nov. 11, 1997
Filed:
Aug. 02, 1995
Applicant:
Inventors:
Harry C Buchanan, Jr, Spring Valley, OH (US);
Peter S Zhou, Dayton, OH (US);
Assignee:
ITT Automotive Electrical Systems, Inc., Auburn Hills, MI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417 12 ; 60410 ; 137554 ; 417 442 ;
Abstract
A check valve, for use in a vacuum accumulator. The check valve includes a movable gate, which blocks fluid flow. The gate carries a first electrical contact, which mates with a second electrical contact, when the gate closes, thereby issuing a signal which indicates closure. The invention eliminates the need for a separate pressure sensor, for sensing pressure within the accumulator.