Sprocket nose guide bar for chain saws

Details Sprocket nose guide bar for chain saws Sprocket nose guide bar for chain saws

1989-10-06

1990-11-20

Watts, Douglas D.

Cutlery

Cutting tools

Saw

474155, B23D 5702, F16H 706

Patent

active

049707892

ABSTRACT:
A sprocket nose guide bar for guiding an endless saw chain. A configured sprocket is rotatably mounted in the nose of the bar and functions to elevate and transport the saw chain around the nose end. The teeth of the sprocket engage the drive links of the chain to lift the chain off the nose edge as the chain traverses the nose. The tooth tips project above the side link bearing surfaces and into configured notches whereby the teeth effectively provide the lifting action without entering the saw chain chassis.

REFERENCES:
patent: 3263715 (1966-08-01), Dobbertin
patent: 3955279 (1976-05-01), Pierson
patent: 4259783 (1981-04-01), Jackson et al.
patent: 4796360 (1989-01-01), Fischer et al.

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