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:
Feb. 17, 2015
Filed:
May. 09, 2012
Chikara Sekiguchi, Yamato, JP;
Shigenori Inamoto, Sagamihara, JP;
Masahiko Aranai, Tendo, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
Provided is a dome-shaped spring for placing on a substrate having stationary contacts, and a circumferential edge of the dome-shaped spring is continuously in contact with the stationary contacts. At least a part of a neutral plane has a shape defined by an even function of at least eighth-order. Angle α of the neutral plane of the dome-shaped spring to the substrate at a second inflection point that exists at a second-positioned inflection point from the circumferential edge, angle β of the neutral plane to the substrate at a first inflection point, and angle γ of the neutral plane at the circumferential edge of the dome-shaped spring to the substrate satisfy following inequalities of α β and β γ.