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:
Apr. 02, 2013
Filed:
Jul. 08, 2008
Hiroaki Yamamoto, Kakuda, JP;
Yutaka Chiba, Kakuda, JP;
Yoshio Saito, Kakuda, JP;
Yoji Nakajima, Kakuda, JP;
Hiroaki Yamamoto, Kakuda, JP;
Yutaka Chiba, Kakuda, JP;
Yoshio Saito, Kakuda, JP;
Yoji Nakajima, Kakuda, JP;
Keihin Corporation, Tokyo, JP;
Abstract
A pressure-reducing valve is provided in which a diaphragm rod connected to a valve body of a valve mechanism is connected to a central part of a diaphragm having its peripheral edge part clamped between a body and a diaphragm cover, wherein the diaphragm () is formed from a disk-shaped rubber sheet for which the sheet thickness of at least its peripheral edge part is uniform in the natural state, and in a state in which the diaphragm cover () is fixed to the body () so that the peripheral edge part of the diaphragm () is compressively held between a collar portion () of the diaphragm cover () and a clamping face () of the body (), a portion having, of the gap between the collar portion () and the clamping face (), a minimum gap is positioned further inward in the radial direction of the diaphragm () than a portion having a maximum gap. This enables the sealing properties and the pull-out resistance for the diaphragm to be guaranteed while achieving a reduction in weight and a reduction in cost.