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US 6,691,752 B2Granted
High rotation felling head mechanism
AssigneeTimberjack Inc.
InventorBenjamin DiSabatino
Life of this patent
Estimating the term…
Abstract
A tree felling saw head has two pairs of links and two hydraulic actuators to provide high rotation of the head relative to a mounting adapter in a lateral plane which is perpendicular to a cutting plane.
Claims7
A mechanism for rotating a tree felling head relative to a mounting adapter frame to which the felling head is rotatably connected to rotate a frame of said tree felling head about a head pivot axis, said mechanism comprising:
- two pairs of links, the links of each pair being pivotally connected at one end to each other to pivot about an intermediate pivot axis, one end of each pair being pivotally connected to a frame of the mounting adapter to pivot about an adapter pivot axis and the other end of each pair being pivotally connected to a frame of the felling head to pivot about a head pivot axis;
- a pair of hydraulic actuators, one of said actuators for each of said pairs of links, each of said actuators being pivotally connected between one of the links of the corresponding pair and one of said frames so as to pivot relative to said link and said frame about respective actuator pivot axes;
- wherein said pivot axes of said actuators and links are substantially parallel to said head pivot axis and said actuators can pivot said head through a total range of motion of 180° or more.
Dependencies are inferred from the claim text.