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:
Mar. 01, 2011
Filed:
Nov. 27, 2007
Toshiaki Sone, Inuyama, JP;
Akira Sakoguchi, Inuyama, JP;
Hiroyuki Ueki, Inuyama, JP;
Takeshi Nakamura, Kanagawa, JP;
Akira Sasaki, Kanagawa, JP;
Toshiaki Sone, Inuyama, JP;
Akira Sakoguchi, Inuyama, JP;
Hiroyuki Ueki, Inuyama, JP;
Takeshi Nakamura, Kanagawa, JP;
Akira Sasaki, Kanagawa, JP;
Kabushiki Kaisha Imasen Denki Seisakusho, Inuyama, JP;
NHK Spring Co., Ltd, Yokohama, JP;
Abstract
The present invention presents a motor drive device capable of detecting jamming accurately without falsely detecting jamming when a movable part contacts with other members. Jamming by a backrest is detected by judging whether the value of a period of one pulse Pand a period of the next pulse P(P/P) integrated for 150 times (integrated value: 150) exceeds a specified threshold () or not. Accordingly, if the backrest rubs against a backrest of an adjacent seat, and the motor speed suddenly drops for a short period, such 'warp' is not falsely detected as jamming, and only actual jamming can be detected securely.