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. 19, 2002
Filed:
Apr. 06, 2001
Nobuya Nakajima, Tokyo, JP;
Kyouichi Ohtsuka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A making operation preventing device has a releasing trigger for retaining, via a releasing latch , a breaking lever to which a torque in a counterclockwise direction is applied by an opening torsion bar ; a releasing electromagnet for opening an on-off contact by releasing the engagement between the releasing trigger and the releasing latch to rotate the breaking lever in a counterclockwise direction; a cam rotated as one body with a gear connected via a link to a making lever to which a torque in a counterclockwise direction is applied by a closing torsion bar ; a making trigger which retains a second pin attached to the cam via a making latch and maintains the closing torsion bar in a prestressing state; a releasing electromagnet for driving a trigger lever in a right direction to release the engagement between the making latch and the making trigger , and an interlocking electromagnet for rotating the trigger lever in a counterclockwise direction when a circuit opening instruction is generated to thereby prevent a circuit closing operation.