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. 17, 2011
Filed:
Sep. 26, 2005
Katsuya Okumura, Tokyo, JP;
Shigenobu Itoh, Komaki, JP;
Kazuhiro Sugata, Komaki, JP;
Kazuhiro Arakawa, Komaki, JP;
Katsuya Okumura, Tokyo, JP;
Shigenobu Itoh, Komaki, JP;
Kazuhiro Sugata, Komaki, JP;
Kazuhiro Arakawa, Komaki, JP;
Octec Inc., Tokyo, JP;
CKD Corporation, Komaki-Shi, JP;
Abstract
An openingof a supply/withdrawal passageis positioned at the center part of the internal wall surfaceof the operating chamber(concave area), and a pinthat protrudes toward the diaphragmis provided in a position that is offset from the center of the wall surface. When the diaphragmis deformed toward the operating chamberby the suction of an operation air into the operating chamberduring drawing in the chemical liquid, a part of the diaphragmopposing to the pinrides on the pinand this part becomes a slightly convex shape toward the pump chamber. When the operation air is supplied from the openinginto the operating chamberduring the discharge of the chemical liquid, the deformation begins first from the part of the diaphragmriding on the pin