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:
Mar. 20, 2007
Filed:
Dec. 01, 2003
Yoji Nakajima, Kakuda, JP;
Kazuki Ishikawa, Kakuda, JP;
Takashi Yoshida, Kakuda, JP;
Katsumi Sahoda, Utsunomiya, JP;
Kouji Miyano, Utsunomiya, JP;
Yoji Nakajima, Kakuda, JP;
Kazuki Ishikawa, Kakuda, JP;
Takashi Yoshida, Kakuda, JP;
Katsumi Sahoda, Utsunomiya, JP;
Kouji Miyano, Utsunomiya, JP;
Keihin Corporation, Tokyo, JP;
Abstract
A regulator for use with fuel cells, which is mounted in a pressure controller of a fuel cell system, has a first diaphragm flexible under the pressure of pilot air supplied as an oxidizing agent to a pilot chamber, a second diaphragm flexible under the pressure of a hydrogen-containing gas flowing through a fluid passage, and a rod connected to a valve head. The spring force of a first spring is set to a value greater than the spring force of a second spring. The regulator is of a normally closed type in which the valve head is seated on a valve seat when the pilot air is not supplied to the pilot chamber.