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:
May. 13, 2003
Filed:
Jun. 11, 2001
Applicant:
Inventor:
Masaharu Nakagawa, Tokyo, JP;
Assignee:
Irie Koken Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 2/502 ;
U.S. Cl.
CPC ...
F16K 2/502 ;
Abstract
A gate valve according to the present invention including a first valve plate having a valve opening and a second valve plate connected to the first valve plate via a first bellows, in which the rigidity and the like of the valve plates, a valve rod, and the like can be reduced as compared to that in a conventional art by canceling the differential pressure.