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. 13, 1990
Filed:
Jul. 12, 1988
Applicant:
Inventor:
Osamu Yaguchi, Kashiwazaki, JP;
Assignee:
Kabushiki Kaisha Riken, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318280 ; 318282 ;
Abstract
A motor-powered opening/closing apparatus includes a circuit for detecting a constrained state of a motor as a power source of a window or a door and deenergizing the motor, and a circuit for detecting clamping of a foreign object between an edge of the window or the door and a fixed frame and stopping or reversing rotation of the motor. These circuits are independently arranged to detect clamping of the foreign object with high sensitivity while a closing force at the closed position can be kept large.