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:
Apr. 10, 2012
Filed:
Nov. 01, 2006
Masanori Wakabayashi, Tokyo, JP;
Yasumasa Oki, Tokyo, JP;
Masanori Wakabayashi, Tokyo, JP;
Yasumasa Oki, Tokyo, JP;
Nitto Kohki Co., Ltd., Tokyo, JP;
Abstract
A pump using a piezoelectric diaphragm is designed to allow the diaphragm to be supported appropriately and accurately and to facilitate assembly of housing members. The peripheral edge of a sheet metal of a unimorph diaphragmon the side thereof facing a first housing memberis pressed and supported with the ridge of an annular projectionannularly provided along the peripheral edge of a vent chamber. The first to third housing membersandare stacked on one another, and the first and third housing membersandare welded together by ultrasonic welding such that the first and second housing membersandabut against each other at abutting portionsandand the second and third housing membersandabut against each other at abutting portionsand, thereby definitely determining the positional relationship between the housing members.