Targeted oil delivery for chain saw bars

A chainsaw, comprising:

• a power head that comprises an oiling mechanism;
• a chain saw bar coupled to the power head at a first end such that it receives oil from the oiling mechanism;
• and
• a saw chain disposed around a perimeter groove of the chain saw bar and coupled to the power head so that it receives rotational motion from the power head,
• wherein the chain saw bar comprises:
• first and second outer walls, each disposed on a side of an inner core and extending past a perimeter edge of the inner core, the perimeter groove defined by the first and second outer walls and perimeter edge,
• a plurality of oil channels disposed within the inner core, each of the plurality of oil channels having a first end configured to receive oil from the oiling mechanism, and a second end terminating in an oil exit port located distal from the chain saw bar first end, and
• a second end that houses a sprocket that engages with the saw chain, and
• wherein at least one of the oil exit ports of one of the plurality of oil channels is located at the chain saw bar second end proximate to the sprocket and comprises a valve, wherein the valve is thermally sensitive such that the valve increasingly opens to allow for greater oil flow at a higher temperatures as compared to at a lower temperature.

A chainsaw, comprising:

• a power head that comprises an oiling mechanism;
• a chain saw bar coupled to the power head at a first end such that it receives oil from the oiling mechanism;
• and
• a saw chain disposed around a perimeter groove of the chain saw bar and coupled to the power head so that it receives rotational motion from the power head,
• wherein the chain saw bar comprises:
• first and second outer walls, each disposed on a side of an inner core and extending past a perimeter edge of the inner core, the perimeter groove defined by the first and second outer walls and perimeter edge,
• a plurality of oil channels disposed within the inner core, each of the plurality of oil channels having a first end configured to receive oil from the oiling mechanism, and a second end terminating in an oil exit port located distal from the chain saw bar first end, and
• a second end that houses a sprocket that engages with the saw chain, and
• wherein at least one of the oil exit ports of one of the plurality of oil channels is located at the chain saw bar second end proximate to the sprocket and comprises a valve,
• wherein the valve is gravity actuated such that the valve substantially prevents oil from flowing out of the at least one of the oil exit ports when the at least one of the oil exit ports is facing downwards and allows the oil to flow out of the at least one of the oil exit ports when the at least one of the oil exit ports is otherwise oriented.

A method for creating a chain saw bar, comprising:

• forming, in an inner core with a perimeter edge defined between a first side of the inner core and a second side of the inner core, a first fluid channel that extends between a first fluid hole at a first end of the inner core and a first fluid exit port at a second end of the inner core, the first end configured to receive a fluid from a fluid supply;
• forming a second fluid channel that extends along a longitudinal direction of the chain saw bar, the second fluid channel in communication with a second fluid hole at the first end of the inner core and a second fluid exit port at the second end of the inner core such that the second fluid exit port is disposed proximate to a nose of the chain saw bar;
• forming, at the second end of the inner core, the first fluid exit port;
• securing, to the first side of the inner core, a first outer wall;
• securing, to the second side of the inner core, a second outer wall, wherein the first outer wall and second outer wall extend past the perimeter edge to define a saw chain groove, and the first fluid exit port and the second fluid exit port are in communication with the saw chain groove;
• and
• providing a valve at the first fluid exit port, wherein the first fluid exit port is disposed at or near the perimeter edge and proximate to a cutting area of the bar groove,
• and wherein the valve is configured to substantially prevent oil from leaking out of the chain saw bar when the chain saw bar is not in use and allow oil to pass out of the fluid exit port when the chain saw bar is in use.