Saw chain for a motor-driven chain saw

Details Saw chain for a motor-driven chain saw Saw chain for a motor-driven chain saw

1987-10-29

1988-05-31

Watts, Douglas D.

Cutlery

Cutting tools

Saw

83833, B27B 1704

Patent

active

047472146

ABSTRACT:
With motor-driven chain saws, there is the danger that the chain saw will be thrown upwardly and rearwardly when it is applied to wood by the user with a forward thrust. Serious injuries can then occur. The invention is directed to a saw chain which is so configured that the cutting forces are automatically reduced in response to the occurrence of excessive reaction forces so that the reaction force is immediately reduced to a tolerable amount thereby eliminating the kickback effect. The drive links of the saw chain which engage into the nose sprocket of the guide bar are so dimensioned that they can further pivot in the tooth gaps of the nose sprocket out of their normal position and, in this way, take the cutting links with them in such a manner that the free angle .alpha. of the cutting teeth is reduced.

REFERENCES:
patent: 4387615 (1983-06-01), Lemery
patent: 4573386 (1986-03-01), Lindemann et al.
patent: 4593591 (1986-06-01), Beerens

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