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. 26, 2003
Filed:
Jan. 17, 2002
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A compact, lightweight and low-cost operating apparatus for a switchgear include a second cam ( ) turned counterclockwise by an electric motor begins to maintain contact with a closing lever ( ) at a first angular position (POS ), turns the closing lever ( ) counterclockwise to energize a circuit-making coil spring ( ), and causes a closing latch ( ) to lock the closing lever ( ). The second cam ( ) further turning counterclockwise becomes separated from the closing lever ( ) and actuates a cam switch ( ) at a second angular position (POS ) to interrupt an electric current supplied to the electric motor. The second cam ( ) further turns due to inertial turning of the electric motor and is braked by a elastic brake member ( ) at a third angular position (POS ), whereby the second cam ( ) stops within a specific angular range &Dgr;&thgr; of rotation. Despite its simple structure, the elastic brake member ( ) can halt the second cam ( ) in a reliable fashion.