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:
Jun. 28, 2005
Filed:
Oct. 24, 2003
Hisanobu Asano, Saitama, JP;
Mitsuhiro Mitsushige, Saitama, JP;
Hideto Yamagata, Saitama, JP;
Yasuhiro Takahashi, Saitama, JP;
Hisanobu Asano, Saitama, JP;
Mitsuhiro Mitsushige, Saitama, JP;
Hideto Yamagata, Saitama, JP;
Yasuhiro Takahashi, Saitama, JP;
Fuji Electric FA Components & Systems Co., Ltd., Tokyo, JP;
Abstract
A circuit breaker includes a fixed contact; a movable contact disposed in a rotary-type contact holder; a switching device; an operation handle; and an over-current tripping device. The operation handle is operated to open and close main-circuit contact points through the switching device. The switching device includes a handle lever connected to the operation handle; a toggle linkage having an upper toggle link and a lower toggle link; a switching spring placed between the handle lever and an arm connecting point of the toggle linkage; and a side plate for holding the components. The circuit breaker further includes a device for preventing the operation handle from moving to an off position when the contact points are stuck together. The device includes first stoppers formed on a cross bar of the contact holder and the handle lever facing the cross bar, and a second stopper formed on the side plate.