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:
Aug. 02, 2005
Filed:
Aug. 21, 2003
Masao Miura, Saitama, JP;
Mitsuhiro Mitsushige, Saitama, JP;
Koji Asakawa, Saitama, JP;
Yasuhiro Takahashi, Saitama, JP;
Hideto Yamagata, Saitama, JP;
Masao Miura, Saitama, JP;
Mitsuhiro Mitsushige, Saitama, JP;
Koji Asakawa, Saitama, JP;
Yasuhiro Takahashi, Saitama, JP;
Hideto Yamagata, Saitama, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A circuit breaker includes a movable contact, a fixed contact, a switching device, a switching operation handle, and an over-current tripping device. The switching device has a switching lever connected to the handle, a toggle linkage having an upper link and a lower link for connecting to the movable contact, a tripping mechanism for activating the toggle linkage in response to over-current, and an operation spring tightly stretched between the switching lever and the toggle linkage. A locking member is provided in the switching device for interconnecting the toggle linkage and the switching lever and for restricting a movement range of the switching lever according to an operational position of the toggle linkage. When main-circuit contact points are stuck, the locking member restricts the movement of the switching lever and prevents the handle from moving to the OFF position.