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:
Oct. 09, 1984
Filed:
May. 20, 1983
Seiji Kosugi, Iwatsuki, JP;
Shoketsu Kinzoku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The solenoid actuator of this invention is provided with a magnetic flanged member for reinforcing the bobbin structure and reducing the magnetic resistance having a flanged portion and a cylindrical portion and inserted said cylindrical portion, whose inner surface is coated with a thin film made of feeble or non-magnetic and wear-resistant material, into the central aperture in a non-magnetic reel-shaped bobbin wound therearound with an energizing coil, and a movable core inserted into the central aperture in the bobbin is guided along the cylindrical portion of the flanged member, whereby the frictional abrasion caused by the sliding movement between the cylindrical portion of the flanged member and the movable core is suppressed and the frictional force caused by the uneven abutment between the outer surface of the movable core and the inner surface of the cylindrical portion of the flanged member is made relatively small to suppress the reduction of the attraction force between the stationary core and the movable core and thereby attaining a smooth operation of the movable core.