Mechanical end face seal with dirt excluder lip

Details Mechanical end face seal with dirt excluder lip Mechanical end face seal with dirt excluder lip

1979-10-22

1981-03-17

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

305 11, F16J 1534

Patent

active

042563151

ABSTRACT:
A seal and sealed mechanism adapted to prevent dirt from entering portions of the seal cavity. The seal includes at least one annular primary seal ring of generally L-shaped cross-section and having a sealing surface formed on one side of the radial flange of the primary ring. An elastomeric secondary seal ring is also provided, with such ring being generally parallelogram-shape in cross-section. The inner diameter of the secondary ring fits snuggly in use over the outer diameter of the axial flange of the primary ring. A dirt excluder lip extends outwardly from one face of the secondary seal ring and covers the end portion of the radial flange of the primary ring to prevent foreign material from entering the cavity between the outer inclined surface of the secondary ring and the end surface of the radial flange of the primary ring. The excluder lip is effective in various axial positions of the seal. The seal may comprise a pair of identical primary and secondary rings in face to face relation. The seal may be incorporated in a sealed mechanism such as a track roller, track pin, or final drive for a crawler tractor or the like.

REFERENCES:
patent: 3241844 (1966-03-01), Morley
patent: 3372940 (1968-03-01), Keller
patent: 3392984 (1968-07-01), Reimsma et al.
patent: 3940154 (1976-02-01), Olsson

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