Aerial chain saw

Details Aerial chain saw Aerial chain saw

1998-02-03

1999-10-05

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft structure

Load accommodation

56 8, 144335, B64D 4700

Patent

active

059610700

ABSTRACT:
An aerial chain saw suspended from a helicopter by a non-rigid suspension system. A continuous chain extends around a chain saw bar, driven by a sprocket. Hydraulic lines to and from the helicopter provide hydraulic power to a hydraulic motor mounted at the upper end of the bar. In addition to the motor, a landing foot is mounted to the upper end of the bar. When the saw is landed, the helicopter slowly lowers the saw to the ground, a lower chain guard protects the lower of the saw, and the landing foot, positioned at right angles to the bar, protects the upper end of the saw. The non-rigid suspension system is made of non-twist material for keeping the cutting direction aligned with the nose of the aircraft. The suspension system is also non-conductive to electrically insulate the aircraft from the chain saw. The non-rigid nature of the suspension system aids landing and dampens vibrational forces transmitted from the chain saw.

REFERENCES:
patent: 1342213 (1920-06-01), Hanson et al.
patent: 2707008 (1955-04-01), Bannister
patent: 4341017 (1982-07-01), Janczak
patent: 4554781 (1985-11-01), Rogers
patent: 4644654 (1987-02-01), Howe et al.
patent: 4662414 (1987-05-01), Fandrich
patent: 4713929 (1987-12-01), Smith
patent: 4815263 (1989-03-01), Hartung et al.
patent: 4984757 (1991-01-01), Hartung et al.
patent: 5190250 (1993-03-01), De Long

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