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US 4,083,463 AGranted
Suspension device for felling unit
AssigneeUmea Mekaniska AB
InventorJan-Eje Ericsson
Life of this patent
Estimating the term…
Abstract
According to the invention, a tree-felling unit is suspended on a crane boom by a device comprising a rotor pivotally suspended on the boom and carrying the felling unit by way of a link member.
Claims10
A device for suspending a tree-felling unit on a crane boom comprising
- a rotator placed between said boom and the tree-felling unit for rotation of said unit in relation to the boom;
- means pivotally connecting said rotator to the boom;
- a link member having a first end and a second end, said link member connecting said tree-felling unit to the rotator;
- a first axle means pivotally connecting said first end of said link member to said rotator;
- a second axle means pivotally connecting said second end of said link member to the tree-felling unit;
- means for pivoting said tree-felling unit about said second axle means to an upper operative position,
- said first and second axle means being perpendicularly located relative to each other;
- and
- means for locking said link member against pivotal movement about said first axle means when the tree-felling unit is in said upper operative position.
6 more elements
Dependencies are inferred from the claim text.