Chain saw control

Details Chain saw control Chain saw control

1990-09-11

1992-09-01

Luong, Vinh T.

Machine element or mechanism

Control lever and linkage systems

Hand operated

745015R, 745026, 74471R, 30382, 30381, F16C 110, B23D 5300, B23D 5702

Patent

active

051429349

ABSTRACT:
A control device on a chain saw, for example, a gas control, consisting of a finger grip (12) and a lever (11) (snapped together) to which the cable and the sheath of a Bowden cable (10) are attached, respectively. The other end of the sheath is fastened to the base of a carburetor compartment. When the grip and the lever move upwards, the rear end (28) of the lever hits a fulcrum (20) in the handle. The grip can continue upwards due to a guide point between the lever and the grip and, thus, the wire is moved in relation to the sheath so that a gas lever (13) of the carburetor is tuned. The sheath, consisting of a spirally wound steel wire, is tightly wound, but has also a short length (31) being sparsely wound as a pressure spring and provides an overload protection preventing the cable from breaking.

REFERENCES:
patent: 4028804 (1977-06-01), Hammond
patent: 4302880 (1981-12-01), Elfving et al.
patent: 4406066 (1983-09-01), Itzrodt
patent: 4594780 (1986-06-01), Schliemann et al.
patent: 4753012 (1988-06-01), Schurr
patent: 4875384 (1989-10-01), Hirayama et al.
patent: 4896425 (1990-01-01), Henriksson
patent: 4898039 (1990-02-01), Aiyama et al.

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