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:
Aug. 20, 2002
Filed:
Sep. 25, 2000
Applicant:
Inventor:
Tadashi Fukami, Inagi, JP;
Assignee:
Oken Seiko Co., LTD, Inagi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 4/306 ; F04B 4/500 ;
U.S. Cl.
CPC ...
F04B 4/306 ; F04B 4/500 ;
Abstract
A diaphragm pump comprising a first diaphragm operated with a driving mechanism such as a crank mechanism, a second diaphragm disposed so as to form an air chamber between the first diaphragm and the second diaphragm, and a pump chamber formed by the second diaphragm and a casing or the like, wherein the a pressure in the air chamber is changed by operating the first diaphragm with the driving mechanism and the second diaphragm is deformed by a change of the pressure in the air chamber to perform a pump function.