IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0623882
(1984-06-25)
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발명자
/ 주소 |
- Rogers, deceased, Randall
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
2 |
초록
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There is disclosed tree trimmer apparatus for installation on a helicopter or the like including a boom hanging vertically downward from the helicopter carrying a plurality of circular saws arranged with their blades nearly adjacent over a length of at least twenty feet on the boom, which is attache
There is disclosed tree trimmer apparatus for installation on a helicopter or the like including a boom hanging vertically downward from the helicopter carrying a plurality of circular saws arranged with their blades nearly adjacent over a length of at least twenty feet on the boom, which is attached to the helicopter in a manner to be constrained against rotation about a vertical axis and to have rotational movement about a horizontal axis at right angles to the normal direction of motion of said helicopter; the blades are preferably powered by a hydraulic motor with groups of five 24-inch blades being driven through belts by one hydraulic motor provided with hydraulic fluid under pressure from a pump in the helicopter. A foot at the bottom of the boom extends to the rear and permits the apparatus to be landed with the bottom of the boom on a landing surface by maneuvering the helicopter backward to lay the boom and saw blades on the ground in front of the helicopter. A pusher rod extends downward from an arm on the top of the boom to push tree branches off of or away from a power line as the branches are being cut; a quick release hook between the top of the boom structure and the helicopter and quick release hydraulic connections permit the apparatus to be dropped in an emergency.
대표청구항
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1. Airborne tree trimmer apparatus for installation on a helicopter or the like comprising a power source carried by said helicopter, boom mounting structure attachable to the underside of said helicopter, a boom pivotally mounted thereto about at least one horizontal pivot axis, saaid boom bei
1. Airborne tree trimmer apparatus for installation on a helicopter or the like comprising a power source carried by said helicopter, boom mounting structure attachable to the underside of said helicopter, a boom pivotally mounted thereto about at least one horizontal pivot axis, saaid boom being restrained from rotation about a vertical axis, a plurality of wood cutting means mounted on said boom, at least one motor attached to said boom and connected to drive said cutting means, and power transmission means connected between said power source and said motor. 2. Apparatus as recited in claim 1 wherein said wood cutting means comprises at least two sets of at least three circular saws and one hydraulic motor, each set of saws being belt powered by said hydraulic motor and wherein all said saws are mounted nearly edge to edge in a common plane. 3. Apparatus as recited in claim 2 further including at least one foot extending rearwardly from said boom beyond the edge of said wood cutting means and adapted to hold said wood cutting means out of contact with the ground during landing and take-off. 4. Apparatus as recited in claim 1 further including at least one foot extending rearwardly from said boom beyond the edge of said wood cutting means and adapted to hold said wood cutting means out of contact with the ground during landing and take-off. 5. Apparatus as recited in claim 1 further including an arm extending laterally from said boom and a pusher rod depending therefrom to a position below the level of the upper cutting means. 6. Apparatus as recited in claim 1 wherein said boom mounting structure includes an extension link at least 10 feet in length depending downward under the center of lift of said helicopter. 7. Apparatus as recited in claim 1 further including a quick release hook remotely controlled from the helicopter's pilot station for separating said boom mounting structure to release and drop said apparatus. 8. Apparatus as recited in claim 1 having at least two motors wherein said motors are hydraulic motors, said power source includes a hydraulic pump and said power transmission means includes hydraulic hoses connected therebetween. 9. Apparatus as recited in claim 8 further including an automatic quick disconnect fixture for separating said hoses to release said apparatus, said fixture being adjacent the point of attachment of said mounting structure to said helicopter. 10. Airborne tree trimmer apparatus for installation on a helicopter or the like comprising a power source carried by said helicopter, said power source being independent of the main helicopter engine, boom mounting structure attachable to the underside of said helicopter, a first boom pivotally mounted thereto about at least one pivot axis, said pivot axis being horizontal and traverse to the principal direction of flight of said helicopter, said first boom being restrained from rotation about a vertical axis, a plurality of saw blades mounted on said first boom for rotation about axes parallel to said pivot axis, said blades being arranged in a common plane and nearly adjacent one another, at least one motor attached to said first boom and connected to drive said saw blades, a second boom connected at the lower end of said first boom, a plurality of circular saw blades mounted on said second boom, said blades being in a common plane with the blades of said first boom, at least one motor attached to said second boom and connected to drive the saw blades thereon, and power transmission apparatus connected between said power source and each said motor. 11. Apparatus as recited in claim 10 wherein said saw blades comprise a set of at least three circular saws on each said boom, each said set being belt powered from a respective one of said motors. 12. Apparatus as recited in claim 10 further including at least one foot extending rearwardly from said boom beyond the edge of said saw blades and adapted to hold said blades out of contact with the ground during landing and take-off. 13. Apparatus as recited in claim 10 further including an arm extending laterally from said boom and a pusher rod depending therefrom to a position below the level of the upper one of said saw blades. 14. Apparatus as recited in claim 10 further including a quick release hook remotely controlled from the helicopter's pilot station for separating said boom mounting structure to release and drop said apparatus. 15. Apparatus as recited in claim 10 wherein said motors are hydraulic motors, said power source includes a hydraulic pump and said power transmission means includes hydraulic hoses connected therebetween. 16. Apparatus as recited in claim 15 further including an automatic quick disconnect fixture for separating said hoses to release said apparatus. 17. Airborne helicopter-mounted tree trimmer apparatus comprising a helicopter with a cargo lift capacity of at least 400 lbs. a power source carried by said helicopter, boom mounting structure attached to the underside of said helicopter near the center of lift thereof, a first boom pivotally mounted thereto about at least one pivot axis, said pivot axis being horizontal and transverse to the principal direction of flight of said helicopter, said first boom being restrained from rotation about a vertical axis, a plurality of circular saw blades mounted on said first boom for rotation about axes parallel to said pivot axis, said blades being arranged in a common plane and nearly adjacent one another, at least one motor attached to said first boom and connected to drive said saw blades, a second boom connected to the lower end of said first boom, a plurality of circular saw blades mounted on said second boom, said blades being in a common plane with the blades of said first boom, at least one motor attached to said second boom and connected to drive the saw blades thereon, and flexible power transmission apparatus connected between said power source and each said motor. 18. Apparatus as recited in claim 17 further including at least one foot extending rearwardly from said boom beyond the edge of said saw blades and adapted to hold said blades out of contact with the ground during landing and take-off. 19. Apparatus as recited in claim 17 further including an arm extending laterally from said boom and a pusher rod depending therefrom to a position below the level of the upper one of said saw blades. 20. Apparatus as recited in claim 17 wherein said motors are hydraulic motors, said power source includes a hydraulic pump and said power transmission means includes hydraulic hoses connected therebetween. 21. Airborne helicopter-mounted tree trimmer apparatus comprising a helicopter with a cargo lift capacity of at least 400 lbs, boom mounting structure attached to the underside of said helicopter near the center of lift thereof, a first boom pivotally mounted thereto about at least one pivot axis, said pivot axis being horizontal and transverse to the principal direction of flight of said helicopter, said first boom being restrained from rotation about a vertical axis, a plurality of circular saw blades mounted on said first boom for rotation about axes parallel to said pivot axis, said blades being arranged in a common plane and nearly adjacent one another, drive means attached to said first boom and connected to drive said saw blades, a second boom connected at the lower end of said first boom, a plurality of circular saw blades mounted on said second boom, said blades being in a common plane with the blades of said first boom drive means attached to said second boom and connected to drive the saw blades thereon, a power source carried by said helicopter, and power transmission apparatus connected between said power source and each said drive means. 22. Apparatus as recited in claim 21 further including at least one foot extending rearwardly from said boom beyond the edge of said saw blades and adapted to hold said blades out of contact with the ground during landing and take-off. 23. Apparatus as recited in claim 21 further including an arm extending laterally from said boom and a pusher rod depending therefrom to a position below the level of the upper one of said saw blades.
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