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:
Oct. 24, 2006
Filed:
Aug. 26, 2004
Applicants:
Hironori Ohhashi, Atsugi, JP;
Hajime Hosoya, Atsugi, JP;
Inventors:
Hironori Ohhashi, Atsugi, JP;
Hajime Hosoya, Atsugi, JP;
Assignee:
Hitachi, Ltd., Tokyo-to, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 33/04 (2006.01); F02B 75/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A check valve disposed between an air pump and a section to be pressurized, is held in a closed state when the section is pressurized by said air pump, and is operated to open when the electric power is supplied to an electromagnetic solenoid. In an abnormally pressurized state, the power supply to the electromagnetic solenoid is shut off, to forcibly close the check valve.