Starter motor pinion shaft oil seal

Details Starter motor pinion shaft oil seal Starter motor pinion shaft oil seal

1990-01-18

1991-10-08

Braun, Leslie A.

Machine element or mechanism

Engine starters

Automatic

74 7A, 74 7E, 277152, 384147, 384484, F02N 1506, F16C 3300, F02F 500

Patent

active

050543296

ABSTRACT:
A starter motor which is improved in waterproof performance. The starter motor comprises an output rotary shaft, a stationary frame, a ball bearing secured to the frame, and a clutch pinion moving member mounted in a coaxial relationship to the rotary shaft between an outer periphery of the rotary shaft and the ball bearing for sliding movement over a predetermined distance in an axial direction thereof. The clutch pinion moving member has a pinion at a front end thereof, and an oil seal is mounted at a location on the frame forwardly of the ball bearing and extending toward the clutch pinion moving member to seal a location between the frame and the clutch pinion moving member. The oil seal has a radial section of an L-shape having an axial side and a radial side extending from a front end of the axial side. It may have a plurality of axially extending drain slots or drain holes formed in a circumferentially spaced relationship on an inner periphery of the axial side thereof. Various other forms of starter motors are also disclosed.

REFERENCES:
patent: 2761710 (1956-09-01), Rudner
patent: 4808836 (1989-02-01), Isozumi et al.
patent: 4895035 (1990-01-01), Okamoto et al.

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