Seal for link of track chain

Details Seal for link of track chain Seal for link of track chain

1983-06-24

1984-07-24

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 95, 277178, 277206R, 305 11, F16J 1538

Patent

active

044614888

ABSTRACT:
A chain-track link assembly has a pin extending along and defining an axis, an outer link element fixed to the pin and forming therewith an axially open annular recess having an annular end face lying substantially in a plane perpendicular to the axis and a radially inwardly directed cylindrical inner surface centered on the axis, an inner link element pivotal about the axis on the pin and having an annular end face substantially parallel to and axially confronting the end face of the outer link element, and an annular seal in the recess between the end faces, centered on the axis and substantially axially symmetrical therearound. The seal has a hard and radially outwardly U-section part formed with a pair of like legs having axially oppositely directed sides each formed by a pair of opposite inclined and axially oppositely tapered surfaces joining substantially at a line. This part bears axially against the end faces at the respective lines and also has a base axially bridging the legs and joined thereto at annular regions of a thickness smaller than the thickness of the legs radially outward therefrom. A relatively springy elastomeric seal part compressed axially between the legs of the outer part is itself formed with a pair of axially oppositely directed sides engaging the respective legs of the hard seal part and themselves formed with respective annular grooves open axially away from each other. This springy seal part has an outer surface that is substantially smooth and ungrooved in axially uncompressed condition of the spring seal part and radially outwardly grooved and forming a pair of ridges engaging the inner surface of the recess when axially compressed in the U-section part between the end faces.

REFERENCES:
patent: 2368611 (1945-01-01), Charnock
patent: 2470925 (1949-05-01), Fredrickson
patent: 2877029 (1959-03-01), Peguet et al.
patent: 2888281 (1959-05-01), Ratti
patent: 3563557 (1971-02-01), Doutt
patent: 4030730 (1977-06-01), Maguire
patent: 4179130 (1979-12-01), Fass et al.
patent: 4204716 (1980-05-01), Baylor

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