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:
Sep. 16, 2003
Filed:
Oct. 22, 2001
Kentaro Toyama, Tokyo, JP;
Naoshi Uchida, Saitama, JP;
Tatsunori Takahashi, Saitama, JP;
Seiichi Suzuki, Saitama, JP;
Tsuneo Fujiwara, Saitama, JP;
Yoshinobu Hamada, Saitama, JP;
Nobuhiro Sekine, Saitama, JP;
Yoshimi Jumonji, Saitama, JP;
Toshizo Kaihoku, Saitama, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A breaking mechanism includes a latch receiver engaging a latch to allow a movable contact shoe to be closed, and a tripping device for rotationally driving the latch receiver to disengage the latch to open the movable contact shoe. An engaging surface of the latch engaging the latch receiver is formed as a projecting circular surface, whereas an engaging surface of the latch receiver engaging the projecting circular surface is formed as a recessed circular surface having a radius of curvature greater than that of the projecting circular surface. The center of the curvature of the recessed circular surface coincides with the axis of a support shaft supporting the latch receiver. The loads causing a tripping device to drive the latch receiver do not change even if the location of an engaging point is changed.