Double insulated starter motor

Details Double insulated starter motor Double insulated starter motor

H - Electricity

02

K

310/37

H02K 7/118 (2006.01) F02N 11/00 (2006.01) F02N 11/14 (2006.01) F02N 15/06 (2006.01) H02K 5/08 (2006.01) H02K 5/10 (2006.01)

Patent

CA 1166677

ABSTRACT OF THE DISCLOSURE The invention pertains to electric starter motors for internal combustion engines, particularly motors used with smaller engines such as employed to power lawn mowers, snow blowers, lawn tractors and similar equipment. The motor hous- ing is formed of a dielectric material as to be doubly electri- cally insulated for protection against electrical shock, the motor casing features simplify assembly of the field coil within the casing, and the motor armature shaft portion and starter pinion shaft portion are formed as two components, rather than the usual one piece, permitting separate heat treatment and eliminating the need for shaft straightening after hardening as required when the armature and pinion shaft are homogeneously formed. Improved frictional engagement between the starter pi- nion and starter drive nut is achieved by the use of a low fric- tion slip ring, and the operating switch for the starter is en- compassed within a dielectric, weatherproof receptacle which may be readily assembled and is tamperproof to protect against shock even under high moisture conditions.

376786

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