Cutlery – Cutting tools – Saw
Patent
1984-12-17
1987-06-09
Goldberg, Howard N.
Cutlery
Cutting tools
Saw
173162R, B27B 1700
Patent
active
046709851
ABSTRACT:
A chain saw having reduced transmission of vibration includes an internal combustion engine, a crankcase, and a crankshaft; a support assembly, the support assembly including a frame and at least one manual gripping handle; and a vibration isolation system for connecting the engine and the support assembly and inhibiting the transmission of vibration. The vibration isolation system comprises: a front vibration mount having an axis parallel to the crankshaft for connecting the crankcase to the front of the frame and a rear vibration mount having an axis parallel to the crankshaft for connecting the cylinder of the engine to the rear of the frame. The front vibration mount and the rear vibration mount are disposed so that a first imaginary line connecting their axes intersects an imaginary vertical plane containing the crankshaft at a point above the crankshaft. The front vibration mount and the rear vibration mount cooperate to permit relative twisting movement between the engine and the frame about the imaginary line. Cut control bumpers are disposed on an axis parallel to the crankshaft, the cut control bumpers being located between the engine and the frame at a position remote from the first imaginary line and such that a second imaginary line connecting the crankshaft and the cut control bumper axis intersects the first imaginary line at a point further from the cut control bumper axis than the crankshaft, the cut control bumpers inhibiting the relative twisting movement between the engine and the frame.
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Goldberg Howard N.
McCulloch Corporation
Ross Taylor J.
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