Aeronautics and astronautics – Aircraft structure – Passenger or cargo loading or discharging
Patent
1989-05-30
1991-01-15
Basinger, Sherman
Aeronautics and astronautics
Aircraft structure
Passenger or cargo loading or discharging
144 2Z, 56235, 56119, B64D 112
Patent
active
049847570
ABSTRACT:
A trapeze mount for mounting an airborne tree trimming apparatus on a helicopter or the like and operating the airborne tree trimming apparatus independently of the helicopter. The trapeze mount is designed to suspend a boom from the helicopter by means of a boom mount bar, which boom supports a plurality of circular saw blades arranged in tandem, coplanar relationship. The trapeze mount includes a pair of downwardly-extending pivot bars, the upper ends of which are pivotally attached to the helicopter fuselage and the opposite, lower ends connected by a cross-bar. A sliding collar is pivotally mounted on the cross-bar by means of a trapeze pivot joint and the sliding collar slidably engages the boom mount bar, which is pivotally attached at one end to a conventional quick-release hook mounted on the fuselage of the helicopter between the pivot bars. The opposite end of the boom mount bar is attached to a lower pivot collar which carries the upper end of the boom upon which the circular saw blades are mounted. The trapeze mount facilitates rearward extension of the boom mount bar, boom and circular saw blades when the airborne tree trimming apparatus is placed on or removed from supports located on the ground, and downward disposition of the boom mount bar, boom and circular saw blades when the airborne tree trimming apparatus is suspended in functional cutting configuration as the helicopter is airborne.
REFERENCES:
patent: 2707008 (1955-04-01), Bannister
patent: 4554781 (1985-11-01), Rogers
patent: 4815263 (1989-03-01), Hartung et al.
Cox, III William C.
Hartung Joe
Basinger Sherman
Bidwell Anne E.
Harrison John M.
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