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:
Aug. 25, 1987
Filed:
Oct. 10, 1985
Masahiro Ashiba, Tokyo, JP;
Takashi Shirakuma, Kanagawa, JP;
Tokico Ltd., Kanagawa, JP;
Abstract
A rotary actuator has a casing; a rotor rotatably provided in the casing; an exciting coil mounted on the rotor; a magnetic pole member provided in the casing which surrounds the rotor; first, second and third contact elements mounted on the rotor and electrically coupled to opposite end terminals and an intermediate terminal of the coil respectively; first and second stops provided in the casing and cooperating with the rotor to restrict the rotation thereof over a predetermined angular range; fourth, fifth and sixth contact elements mounted on the casing to cooperate respectively with the first, second and third contact elements such that the sixth contact element permanently contacts the third contact element, that the fourth contact element contacts the first contact element except when the rotor engages and is adjacent to the first stop and that the fifth contact element contacts the second contact element except when the rotor engages and is adjacent to the second stop; and a switch for applying electric power to the sixth contact element and selectively to the fourth and fifth contact elements. An indicating device is connected to the switch to indicate whether the rotor is at a first position engaging the first stop or at a second position engaging the second stop.