Woodworking – Special-work machine – Combined
Patent
1998-01-20
1999-08-31
Bray, W. Donald
Woodworking
Special-work machine
Combined
144 2413, 144336, 144343, 144 341, A01G 23083, A01G 23095
Patent
active
059440775
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a device with a motor-driven chain saw for the disbranching and felling of trees.
BACKGROUND OF THE INVENTION
When divesting trees of their branches, especially tall trees, the problem frequently arises that persons or objects have to be protected from the cut-off, dropping branches. The motor-driven chain saws, due to their weight, can only be operated and guided with both hands of the operator, from which circumstance the necessity arises of a further auxiliary person having to hold the end of the branch that is being cut off. When Larger branches or tree trunks are involved, additional auxiliary means are required, by way of example in such a way that the branch to be severed has to be secured against falling down by means of ropes or other lifting tackle.
That is why the technical problem of the present invention is to construct a device of the type stated in the beginning in such a way that the severed workpieces, when cut, are secured against falling down without any additional supplementary means. According to the technical problem, the device is intended to be compatibly and safely operable by one person.
SUMMARY OF THE INVENTION
The technical problem is resolved by means of the device according to the present invention, is characterized by a seizing means for the workpieces to be cut, such as tree branches, tree trunks and suchlike, which is swivellable relative to the blade of the chain saw. With the seizing means, the branch to be severed from the tree is held during the cutting operation, whereby the hitherto necessary auxiliary person or other lifting means can be saved. Hereby, working with the chain saw according to the invention can be carried out more economically than has been possible up to now. This applies correspondingly to the cutting off of other objects, such as e.g. roof laths.
The entire equipment combination, comprising grabbing arms, their bearing brackets and the chain saw unit, in this case, is, with the aid of a slewing means that is capable of slewing this equipment combination in a vertical plane in each case through only 180.degree. to the right or to the left, connected with the pertinent lifting means, such as a crane jib or excavator grapple. The chain saw unit itself, inclusive of the driving motor of the same, is swivellable across the cutting area with the aid of a swivel motor, to which the saw unit is attached direct. It is also possible for this operation to be executed by means of a further hydraulic cylinder when the same unit is mounted on a vertically disposed axis underneath the seizing means. Thus, according to a further construction of the invention, the seizing means is comprised of at least two, preferably though at least three, grabbing arms which are swivellable about a common axis or about mutually parallel axes. The grabbing arms, which are preferably configured so as to possess a sickle-like shape, are moved toward each other to such an extent that they come to force-lockingly embrace the workpiece portion released by the severance during the cutting operation and thereafter. By preference, the grabbing arms are in each case rotatably mounted on a shaft, they consequently constitute one-armed swivellable levers, which can be moved toward each other or aay from each other.
In a special construction of the invention, the device is, by means of a swivel motor, connected with a carrying support, with which the grabbing arms are connected direct or indirect. The carrying support which, by way of example, is fastened to other lifting means, such as ropes, chains or to a telescopic arm, with the aid of the swivel motor hinged hereon, make possible any angle of rotation adjustments of the grabbing arms and/or a swivelling of the chain saw blade about an axis of rotation which is located approximately parallel to the longitudinal axis of the workpiece to be cut. After the grabbing arms have been closed it is thus possible, by means of the swivel motor, to swivel the saw blade for the cut through the bran
REFERENCES:
patent: 3542099 (1970-11-01), Gibson
patent: 3606915 (1971-09-01), Lindblom
patent: 3763904 (1973-10-01), Eynon
patent: 3885610 (1975-05-01), Forslund et al.
patent: 3911981 (1975-10-01), Tucek
patent: 4569379 (1986-02-01), Gemmell-Murdoch
Henning Peter
Rothkegel Volker
Bray W. Donald
Kueffner Friedrich
LandOfFree
Equipment including a motor-driven chain saw for cutting branche does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Equipment including a motor-driven chain saw for cutting branche, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Equipment including a motor-driven chain saw for cutting branche will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2423578