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:
Sep. 08, 1981
Filed:
Feb. 08, 1980
Hiroshi Ueda, Nara, JP;
Shigeru Oyokota, Sakai, JP;
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Abstract
An electromagnetically driven device has a coil and a plunger movably inserted in the coil between an inserted and ejected positions. An armature carrying a permanent magnet is provided at one end of the coil for holding the plunger in the inserted position by a magnetic attractive force developed between the armature and the plunger when the coil is deenergized. A yoke is provided between the permanent magnet and the armature for establishing a magnetic circuit therebetween with a predetermined reluctance developed between the armature and the yoke.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile