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.

Date of Patent:
Aug. 14, 2007

Filed:

Feb. 27, 2006
Applicants:

Yoshitake Sakai, Toki, JP;

Osamu Sato, Minokamo, JP;

Inventors:

Yoshitake Sakai, Toki, JP;

Osamu Sato, Minokamo, JP;

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F15B 7/06 (2006.01); B64C 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

An operate check valve saves space and performs multiple functions by absorbing and integrating a switching valve. A switching valve for controlling the flow of a hydraulic fluid in both normal and reverse directions is coaxially contained with a check valve in a space inside a valve containing housing between a hydraulic pump and a tank for storing the hydraulic fluid. Check valves are located opposite one another on either side of the switching valve, with the switching valve integrated into the operate check valve.


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