B - Operations – Transporting – 27 – B
Patent
B - Operations, Transporting
27
B
143/9
B27B 17/02 (2006.01) B27B 17/04 (2006.01) B27B 17/12 (2006.01)
Patent
CA 1126623
ABSTRACT OF THE DISCLOSURE: 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 means placed in a central hole of the axle. When under the pressure of forced grease through the aperture, the flap or valve means is resiliently yieldable to allow the grease to be introduced for the lubrication of the roller bearings.
347986
Robic Robic & Associes/associates
Sugihara Hideo
LandOfFree
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