Woodworking – Special-work machine – Tree felling
Patent
1976-01-05
1978-01-10
Simpson, Othell M.
Woodworking
Special-work machine
Tree felling
37 2R, 144 2N, 173 49, 214 3, 254132, A01G 2306
Patent
active
040673693
ABSTRACT:
A whole tree extraction device is mounted on a prime mover. The extraction device is comprised of a load frame which is carried and supported by the prime mover. Slidably mounted on one side of the load frame is the power frame to which is attached at least one power cylinder for moving the power frame with respect to the load frame. Mounted on the power frame forwardly thereof is a vibrator frame to which is attached a pair of cooperating shearing blades together with a pair of cooperating gripping extractor arms. A pair of upper gripper arms are mounted on the load frame and open and close in response to a command signal independently of the shearing blades and gripping extractor arms. Means to vibrate the shearing blades and the gripping extractor arms relative to the power frame in a substantially vertical plane during the shearing and extracting modes are operable on a command signal. The vibration imparted to the shearing blades enhances shearing of the lateral roots while the vibration imparted to the gripping extractor arms both enhances lifting and aids in soil removal from the root system.
REFERENCES:
patent: 3336082 (1967-08-01), Bodine, Jr.
patent: 3738401 (1973-06-01), Wiklund
patent: 3914883 (1975-10-01), Bodine
patent: 3933188 (1976-01-01), Boivin
patent: 3936960 (1976-02-01), Clegg
patent: 3958613 (1976-05-01), Herz
Bray W. D.
Simpson Othell M.
Weyerhaeuser Company
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