Woodworking – Special-work machine
Patent
1979-09-06
1981-11-03
Bray, W. D.
Woodworking
Special-work machine
144208E, B27L 100
Patent
active
042980429
ABSTRACT:
Disclosed herein is a rotary delimber for a timber harvester in which the branches are severed from a tree trunk as the tree trunk is fed axially through a hollow rotor carrying a plurality of cutters. Each cutter is secured to a spindle rotatably supported in a cutter arm for movement about an axis transverse to the axis of the rotor. A torsion bar in each cutter arm is connected to the spindle to yieldably bias the cutter inwardly toward the axis of the rotor. The cutter arms are rotatably supported on circumferentially arranged spindles secured to an outturned flange on the rotor for movement toward and away from the axis of the rotor. Torsion springs yieldably bias the cutter arms inwardly toward the axis of the rotor. Each cutter arm is provided with a cam plate which is engageable with a roller on a clutch arm mounted on an axially movable clutch ring. The clutch ring is splined to the rotor and movable axially of the rotor by one or more hydraulic cylinders to cause engagement of the rollers with the cam plates to move the cutters and cutter arms away from the axis of the rotor to receive tree trunks of varying diameters.
The rotor is yieldably mounted on a vehicle frame to afford displacement of the rotor about horizontal and vertical axes.
REFERENCES:
patent: 3137329 (1964-06-01), Smith
patent: 3543819 (1970-12-01), Peltola
patent: 3882910 (1975-05-01), Peltola
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