Tree harvesting apparatus
OwnerFletcher Argueinventor
Life of this patent
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Abstract
There is disclosed a tree harvesting apparatus which provides a helical spline for permitting movement of a harvesting head about a central vertical axis thereof. This provides enhanced manoeuverability of the head to prevent damage to saplings or other immature timber. A chain saw chain detensioning system is also disclosed. The system permits a quick removal of a saw chain from the chain saw without the use of tools therefore is more easily changed in an expedited manner.
Claims16
A chain saw comprising:
- a chassis;
- a saw bar extending from said chassis;
- a saw chain positioned about said saw bar;
- adjustable tensioning means for adjustably effecting axial movement of said bar relative to said chassis to adjust the tension of said saw chain on said saw bar;
- and
- fluid control valve means operatively connected to said tensioning means to actuate said tensioning means.
A tree harvesting system for felling and shaping trees, said apparatus attachable to the end of a support arm, comprising:
- a main processing head for felling and shaping a tree;
- a mounting member connected to said main processing head;
- and
- selectively pivotal linkage means comprising a double helical spline actuator extending between said main processing head and said mounting member, said actuator operable for selective pivotal movement of said main processing head about an axis parallel to said main processing head;
- means for connection of said apparatus to a source of fluid.
A tree harvesting system, comprising:
- a main tree processing head having a central axis and means adapted for connection of said head to a vehicle;
- said main processing head including:
- tree gripping means;
- tree de-limbing means;
- means for advancing a tree relative to said main processing head;
- selectively operable chain saw cutting means mounted to a chassis on said main tree processing head;
- said chassis having a saw bar and a saw chain therearound;
- tensioning means for moving said saw bar relative to said chassis to effect tensioning of said saw chain;
- fluid control valve means operatively connected to said tensioning means to effect movement of said saw bar;
- a mounting member connected to said main processing head;
- and
- selectively operable pivotal linkage means extending between said main processing head and said mounting member, said linkage means selectively operable to effect pivotal movement of said main processing head about an axis parallel to said central axis of said main processing head;
- and
- means for connection of said main processing head to a source of fluid.
Dependencies are inferred from the claim text.