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:
Nov. 03, 2009
Filed:
Apr. 22, 2005
Toshiyuki Abe, Minamiazumi-gun, JP;
Kiyoto Kobayashi, Minamiazumi-gun, JP;
Toshiyuki Abe, Minamiazumi-gun, JP;
Kiyoto Kobayashi, Minamiazumi-gun, JP;
Harmonic Drive Systems Inc., Tokyo, JP;
Abstract
An electromagnetic brake device () is assembled to a rear end section of a small-sized motor (). The electromagnetic brake device () has a rotating disc () fixed to a motor rotation shaft (), a sliding disc () slidable in an axial direction, a coil spring () pressing the sliding disc () to the rotating disc (), and an electromagnet () capable of attracting the sliding disc () against spring force. A circular recess () is formed in the center of a rear end surface of a yoke () of the electromagnet (). In a state where the electromagnetic brake device () is assembled, a bearing () supporting a rear end shaft section () of the motor rotation shaft is received in the circular recess (). As a consequence, no large circular dead space is produced at a portion on the outer periphery side of the bearing (), which portion is between a motor end plate () and a rear end surface of the electromagnetic brake device (). As a result, the length of the shaft of the small-sized motor () is suppressed from increasing.