Woodworking – Special-work machine – Combined
Patent
1976-06-29
1982-02-02
Bray, W. D.
Woodworking
Special-work machine
Combined
91448, 91532, 144 34E, A01G 2308
Patent
active
043134793
ABSTRACT:
A tree harvesting machine is disclosed in which a grappling arm functions to reach behind a tree and draw the machine forwardly to force a shearing blade through the tree close to the ground. The harvester frame holds the severed tree and includes spring-loaded holders which allow the tree to enter the collecting space but prevent its escape once severed. The grappling or draw arm is operated by two piston/cylinder devices connected mechanically in parallel but which are hydraulically actuated in a particular sequence and fashion which assures quick closing of the draw arm upon a tree, slow but powerful shearing action, and quick opening of the draw arm.
REFERENCES:
patent: 3350986 (1967-11-01), Berta et al.
patent: 3468352 (1969-09-01), Larson et al.
patent: 3493020 (1970-02-01), Chopt
patent: 3536113 (1970-10-01), Sutherland
patent: 3565141 (1971-02-01), Galis
patent: 3785415 (1974-01-01), Taponen
patent: 3795264 (1974-03-01), Coughran, Jr.
patent: 3910326 (1975-10-01), Tucek
patent: 3994325 (1976-11-01), Cryder et al.
patent: 4050488 (1977-09-01), Albright
Bray W. D.
Rome Industries, Inc.
LandOfFree
Draw shear does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Draw shear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Draw shear will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1817990