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:
Dec. 01, 2015
Filed:
Mar. 24, 2011
Hideki Yamada, Minokamo, JP;
Tomoharu Murakami, Kakamigahara, JP;
Tadashi Oikawa, Nagoya, JP;
Tomohito Amino, Kasugai, JP;
Yoshinori Nomura, Kasugai, JP;
Hideki Yamada, Minokamo, JP;
Tomoharu Murakami, Kakamigahara, JP;
Tadashi Oikawa, Nagoya, JP;
Tomohito Amino, Kasugai, JP;
Yoshinori Nomura, Kasugai, JP;
KAYABA INDUSTRY CO., LTD., Tokyo, JP;
FINE SINTER CO., LTD., Aichi, JP;
Abstract
A leaf valve structure according to this invention comprises an annular valve seat, and a leaf that is seated on the valve seat under a predetermined elastic supporting force against a pressure of a working fluid on an inner side of the valve seat. A recessed depression portion having an opening portion on both an inner periphery of the valve seat and a seating surface of the leaf is formed in the valve seat, thereby creating a site where the pressure of the working fluid on the inner side of the valve seat can act more easily on a seating surface between the valve seat and the leaf valve. Accordingly, an effect of a surface adsorption force applied to the leaf valve by the valve seat on a cracking pressure can be suppressed, and as a result, the leaf valve can be lifted under a stable cracking pressure.