Mechanism for rotating a tree-felling implement and tree-felling

Details Mechanism for rotating a tree-felling implement and tree-felling Mechanism for rotating a tree-felling implement and tree-felling

1995-12-12

1997-01-21

Bray, W. Donald

Woodworking

Special-work machine

Tree felling

74 25, 74 99R, 144 41, 144336, 414680, 414694, 4146957, 414739, A01G 2308, E02F 332

Patent

active

055952259

ABSTRACT:
The mechanism is used for rotating a tree-felling implement rotatably connected to a distal end of a boom of a logging vehicle by an implement pivot. The mechanism comprises a pinion coaxial with the implement pivot and fixed in rotation with reference to the distal end of the boom. Two longitudinally extending actuators are mounted on the frame. Both actuators are lying in the pinion plane. Each actuator is adjacent to the pinion on a respective side thereof, namely right and left, and bears a corresponding sprocket coplanar with the pinion plane and rotatably connected to their free end. To link the elements together, there is provided a chain in mesh with the sprockets and the pinion. The chain has ends rigidly attached to the frame of the implement. In use, the implement is rotated as the actuators are operated in opposite directions. The mechanism provides a simple and reliable construction for rotating a tree-felling implement that is capable of rotating the implement with reference to the boom plane in both directions and according to a wide range of angles.

REFERENCES:
patent: 2681739 (1954-06-01), Gokey
patent: 3027026 (1962-03-01), Couquet
patent: 3081891 (1963-03-01), Przybylski
patent: 3197049 (1965-07-01), Schwing
patent: 3217910 (1965-11-01), Waite
patent: 3278046 (1966-10-01), Shumaker
patent: 3294131 (1966-12-01), Larson
patent: 3495727 (1970-02-01), Long
patent: 3550794 (1970-12-01), Suverkrop
patent: 3590894 (1971-07-01), Boyd
patent: 3796331 (1974-03-01), Dutton
patent: 3840132 (1974-10-01), Howells, Jr. et al.
patent: 4134505 (1979-01-01), Watanabe
patent: 5074740 (1991-12-01), Weigel

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