Tree shear actuator restraint system

Details Tree shear actuator restraint system Tree shear actuator restraint system

1977-03-07

1978-03-07

Schran, Donald R.

Woodworking

Special-work machine

Tree felling

83600, 92161, 144 3D, A01G 2308

Patent

active

040774473

ABSTRACT:
A tree shear head includes a frame which supports a pair of parallel crank shafts which are respectively linked to a pair of shear blades for moving the latter together into the trunk of a tree to be sheared upon rotation of the crank shafts. The crank shafts are rotated by means of an actuator including a cylinder in which a pair of piston and rod units are mounted with the rods projecting oppositely and being respectively connected to the pair of crankshafts. To prevent the cylinder of the actuator from shifting axially relative to the rods and from rotating on the rods, cables are connected between the cylinder and the frame.

REFERENCES:
patent: 2641942 (1953-06-01), Mueller
patent: 3808909 (1974-05-01), Johnson
patent: 3826295 (1974-07-01), Johnson et al.

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