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:
Feb. 26, 2008
Filed:
May. 27, 2004
Tomohisa Takeda, Matsuyama, JP;
Tomohisa Takeda, Matsuyama, JP;
Miura Co., Ltd., Ehime-ken, JP;
Abstract
A check valve has an elastic valve body portion and an inelastic valve body portion and a valve seat. The valve body is fixed to a valve shaft, and a valve body abutment plate for abutting the elastic valve body portion is supported to the valve shaft. The valve body abutment plate includes an elastic valve body portion pressing portion for pressing on an outer peripheral portion of the elastic valve body portion and a backflow fluid pressure exerting hole for causing fluid pressure from the fluid outlet side to be exerted on the elastic valve body portion. A spring for urging the valve body into abutment with the valve seat through the valve body abutment plate is interposed between the valve body abutment plate and a shaft support portion provided on the fluid outlet side.