Seal

Details Seal Seal

1979-02-08

1980-08-12

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

305 11, B62D 5500, F16J 1534

Patent

active

042169739

ABSTRACT:
An improved bearing seal (29) for use in a vehicle (10), such as a tractor, for preventing contamination of a pivot shaft bearing (23) or the like, which may be subjected to dirt, particulate matter, etc. The bearing seal (29) includes a lip seal (30), a labyrinth seal (32), and a dirt seal (33). The elements of the bearing seal are arranged in series relationship between one end (31) of the bearing and a shoulder (34) on the pivot shaft structure (21). The pivot shaft structure may define a swingable link (16) for mounting an idler (14) in the frame (15) of the vehicle trank (11). The labyrinth seal (32) may further define an abutment surface (35) for the dirt seal (33), and in the illustrated embodiment, defines a hardened washer having an inner diameter (39) slightly larger than the outer diameter of the pivot shaft (21) so as to define a sealing labyrinth therebetween. A guide boss (44 ) may be provided on the pivot shaft link portion (17) for cooperation with a frame portion (20) of the track mounting structure to prevent undesirable axial displacement of the pivot shaft (21).

REFERENCES:
patent: 3414274 (1968-12-01), Takahashi
patent: 3899218 (1975-08-01), Blomstrom et al.
patent: 4062550 (1977-12-01), Satsumabayashi
patent: 4087099 (1978-05-01), Kurio
patent: 4132418 (1979-01-01), Roli

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