Chain guide for a chain saw

Details Chain guide for a chain saw Chain guide for a chain saw

1980-03-12

1982-03-30

Peters, Jimmy C.

Cutlery

Cutting tools

Saw

474 91, B27B 1712

Patent

active

043217508

ABSTRACT:
A chain saw guide blade includes a pair of side plates between which an axle is fixedly supported and a sprocket is rotatably supported with respect to the axle. The sprocket is rotatable about the axle with roller bearings therebetween for guiding a cutter chain for movement around the edge of the guide blade. A pair of annular seals are respectively disposed between the sprocket and one of the side plates and between the sprocket and the other side plate. Each of the seals includes an annular lip projecting obliquely into resilient contact with a surface of the sprocket or of one of the side plates. A grease-supply aperture in each side plate is normally closed off by a flap on the annular seal or resilient valve placed in a central hole of the axle. When under the pressure of forced grease through the aperture, the flap or valve is resiliently yieldable to allow the grease to be introduced for the lubrication of the roller bearings.

REFERENCES:
patent: 2823553 (1958-02-01), Harrington
patent: 3198223 (1965-08-01), Bowen

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