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:
Apr. 08, 1997
Filed:
Dec. 28, 1995
Hitachi, Ltd., , JP;
Abstract
In a permanent magnet starter, a pinion clutch is smoothly engaged with a rotating shaft of an electric motor through a helical spline. A rotation restraint member is arranged at an outer periphery portion and this rotation restraint member is forcibly arranged by a magnetic field coil which is controlled from an outside portion. In a permanent magnet type motor having no magnetic field coil for exciting the motor, it is unnecessary to alter a motor unit. By the rotation force of an armature a pinion gear of the pinion clutch is moved, accordingly the permanent magnet starter for reducing the collision force during the meshing time of the pinion gear to a ring gear can be obtained. Further the permanent magnet starter having a superior gear meshing withstanding property and further without the lowering in the sealing property in the motor unit can be obtained.