Machine element or mechanism – Engine starters – Automatic
Patent
1988-02-23
1989-06-13
Herrmann, Allan D.
Machine element or mechanism
Engine starters
Automatic
74 7R, 74 7C, 290 38R, 310 78, 310 92, 310154, 335126, F02N 1506, H01F 702, H02K 2128
Patent
active
048381004
ABSTRACT:
A coaxial type starter used to start an engine of a vehicle is disclosed. The starter includes a d.c. motor having an armature rotary shaft which incorporates an overrunning clutch and six or more magnetic poles which are defined by permanent magnets disposed circumferentially on the inner surface of a tubular yoke for forming a magnetic path. Provision of six or more magnetic poles on the inner surface of the yoke enables a reduction in the thickness of the yoke and the diametrical thickness of the armature core since the required thicknesses of the yoke and the armature core are inversely proportional to the number of field magnetic poles. Accordingly, it is possible to incorporate the overrunning clutch inside the armature rotary shaft without any increase in the overall diameter of the starter. Thus, it is possible to achieve a reduction in the overall size of the starter.
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patent: 4687608 (1987-08-01), Eino
patent: 4695735 (1987-09-01), Tallis, Jr. et al.
Herrmann Allan D.
Mitsubishi Denki & Kabushiki Kaisha
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