Tree cutting and wood manipulating grapple

Details Tree cutting and wood manipulating grapple Tree cutting and wood manipulating grapple

1994-02-01

1995-08-15

Bray, W. Donald

Woodworking

Special-work machine

Combined

83928, 303795, 144 34R, 144 2Z, A01G 2308

Patent

active

054410908

ABSTRACT:
A gripping apparatus is provided that may be rotatably mounted on a vehicle, comprising an articulated boom with a gripping head rotatably and pivotally mounted thereto. The head is provided with opposable jaws comprising jaw members that apply an even pressure to an object being gripped. A saw may be pivotally mounted to the head. A drive coupling may be provided to provide a continuous rotary link between hydraulic lines on the boom with lines the head. The coupling comprises a coupling body rotatably housed within a sheath with a groove between the coupling body and the sheath. The groove permits fluid to be transmitted from the body to the sheath while they are rotated relative to each other. The boom may be provided with a link joining two of the segments, provided with dual articulated cylinder mounts on opposing sides and capable of permitting approximately 360 degrees of rotation between the segments.

REFERENCES:
patent: 3590760 (1971-07-01), Boyd
patent: 4881582 (1989-11-01), Ketonen
patent: 4981163 (1991-01-01), Westlund
patent: 5107912 (1992-04-01), Cote et al.

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