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:
Jan. 16, 2007
Filed:
Dec. 03, 2004
Akinori Igawa, Hino, JP;
Shoji Takemoto, Hono, JP;
Akinori Igawa, Hino, JP;
Shoji Takemoto, Hono, JP;
Toflo Corporation, Tokyo, JP;
Abstract
There are provided a flow control valve and a flow control device suitable for allowing flow control of a fluid with high accuracy. Diaphragmsandare mounted to upper and lower openings, respectively, of an air chamber. The upper diaphragmand the lower diaphragmare connected by a connecting shaftand have pressurized surfaces with different areas that receive pressure of the air chamber. This causes a difference between forces applied to the two diaphragmsand, and the difference causes the connecting shaftand a valve bodymounted to an outer surface of the lower diaphragmto slide and be separated from a valve seat