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:
Jul. 11, 2006
Filed:
Jun. 14, 2004
Hitoshi Ota, Tokyo, JP;
Akira Hashimoto, Tokyo, JP;
Kazuhiro Shono, Tokyo, JP;
Naoki Kajita, Tokyo, JP;
Hisanori Uozumi, Tokyo, JP;
Naoki Hashiguchi, Tokyo, JP;
Hitoshi Ota, Tokyo, JP;
Akira Hashimoto, Tokyo, JP;
Kazuhiro Shono, Tokyo, JP;
Naoki Kajita, Tokyo, JP;
Hisanori Uozumi, Tokyo, JP;
Naoki Hashiguchi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A brake structure of a traction machine includes a brake drum which is made rotatable about a shaft disposed on a rotary axis of the traction machine, and an electromagnetic brake unit built in an inner space of the brake drum. The electromagnetic brake unit includes a plurality of movable iron cores, a plurality of brake shoes located on the outside of the individual movable iron cores and joined thereto by connecting members, the brake shoes having curved outer surfaces facing a curved inner surface of the brake drum, and a one-piece formed stationary iron core block. The one-piece formed stationary iron core block has a plurality of stationary iron core portions joined to the individual movable iron cores via compression springs for forcing the individual brake shoes against the curved inner surface of the brake drum via the movable iron cores and the connecting members.