초록

A chain saw includes a chain formed into a closed loop about a drive sprocket and a support bar. A first piston is operable to move the support bar radially away from the drive sprocket, and a second piston is operable to limit such movement.

대표청구항 ▼

[ What is claimed is:] [1.] A chain saw, comprising:a bar;a drive member;a continuous loop of chain fitted about the bar and the drive member; andan adjusting means for adjusting the bar relative to the drive member, wherein the means automatically prevents chain tension from exceeding a predetermin

[ What is claimed is:] [1.] A chain saw, comprising:a bar;a drive member;a continuous loop of chain fitted about the bar and the drive member; andan adjusting means for adjusting the bar relative to the drive member, wherein the means automatically prevents chain tension from exceeding a predetermined limit as chain tension increases in response to user input, and the means automatically prevents chain tension from exceeding the predetermined limit as chain tension increases in response to cooling of the chain, wherein the adjusting means includes a first piston which is movable in a first direction to adjust the bar relative to the drive member, and a second piston which transmits force in a second, perpendicular direction to resist movement of the first piston.