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:
May. 29, 1979
Filed:
Apr. 21, 1975
Kenneth Preece, Solihull, GB;
David F Spriggs, Sutton Coldfield, GB;
Joseph Lucas (Industries) Limited, Birmingham, GB;
Abstract
A starter motor for an internal combustion engine includes a shaft rotated by an electric motor, a pinion gear wheel carried by the shaft the gear wheel being rotated with the shaft and axially movable relative thereto between an operative position and a rest position, and an electro-magnet for moving the pinion from its rest position to its operative position. The electro-magnet includes an armature which is coupled to the pinion gear wheel, and which is guided for movement parallel to the shaft. First and second electro-magnet poles are spaced apart around the shaft and are spaced from the armature in the rest position of the armature in the direction of movement of the armature. A member magnetically interconnects the two poles, and the electro-magnet further includes a winding which when energized induces a flow of magnetic flux from the first pole to the armature within the armature laterally relative to the shaft, from the armature to the second pole, and from the second pole within the member back to the first pole.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile