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:
Oct. 16, 2012
Filed:
Jun. 14, 2010
Yasuhiro Naka, Kounosu, JP;
Toshikatsu Ohgami, Kumagaya, JP;
Koji Okubo, Kumagaya, JP;
Kouetsu Takaya, Kounosu, JP;
Kenji Suzuki, Minami-Saitama-gun, JP;
Yasuhiro Naka, Kounosu, JP;
Toshikatsu Ohgami, Kumagaya, JP;
Koji Okubo, Kumagaya, JP;
Kouetsu Takaya, Kounosu, JP;
Kenji Suzuki, Minami-Saitama-gun, JP;
Fuji Electric Fa Components & Systems Co., Ltd., Tokyo, JP;
Abstract
The electromagnetic contactor enables a reliable return to a pole open position without increasing the spring force of a return spring. In an electromagnetic contactor, an electromagnetic device having an exciting coil and a contact mechanism having a return spring are disposed in parallel, and the electromagnetic device and contact mechanism are linked by a drive lever. The electromagnetic device has a polarized electromagnet having a magnetic circuit that includes a permanent magnet generating a suction force that moves the contact mechanism to a pole open position side when the exciting coil is not energized. The drive lever is fixed to either one of the electromagnetic device or contact mechanism and contacts with the other with no gap at least when the contact mechanism is moved to the pole open position side. The return force of the contact mechanism is covered by the suction force of the permanent magnet.