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Moisture seal for a translatable pinion gear assembly in a starter motor

  • US 4,958,530 A
  • Filed: 08/31/1989
  • Issued: 09/25/1990
  • Est. Priority Date: 08/31/1989
  • Status: Expired due to Term
First Claim
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1. A starter motor for an engine having a driven gear comprising:

  • an electric motor;

    an output shaft mounted for rotation about its axis by said electric motor;

    a pinion gear, having a first portion containing a plurality of gear teeth for engaging said driven gear and a shank portion adjacent thereto, mounted on said output shaft for slidable movement along said output shaft between a first position in which the gear teeth are out of engagement with said driven gear and a second position in which the gear teeth are engaged with said driven gear;

    an overriding clutch mounted on said output shaft for rotation therewith and engaged with said pinion gear for slidable movement therewith to provide a frictional one way rotational engagement with said pinion gear;

    a housing for said motor containing an internal portion surround the overriding clutch and defining a space between said housing and said clutch to allow movement of said clutch with said pinion gear both along, and in rotation with, said output shaft;

    an annular shaped member retained on said internal portion of said housing having an annular lip portion extending to said space defined between said housing and said clutch; and

    cylindrical sealing member mounted on said clutch having an outwardly extending flange for contacting said annular lip portion when said pinion gear is in said first position and for breaking contact with said annular lip portion when said pinion gear is moved from its first position.

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