Chain saw and fluid pump
AssigneeChervon Intellectual Property Limited
InventorsToshinari Yamaoka, Fangjie Nie, Huixing Fu
Life of this patent
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Abstract
A chain saw has a fluid pump. The fluid pump has a pump rod, a pump core assembly defining a pumping channel, and a pump body. The pump core assembly has an inner pump core and an outer pump core . The pumping channel is formed at least by a first hole defined in the inner pump core and a second hole defined in the outer pump core and the first hole is in communication with the inlet and the outlet. The pump rod is arranged to do a straight reciprocating motion in the pumping channel along a first axis so as to force fluid to flow from the inlet to the outlet by passing through the first hole.
Claims20
A fluid pump, comprising:
- a pump rod;
- a pump core assembly defining a pumping channel;
- and
- a pump body defining an inlet, an outlet and a cavity having an opening at one end;
- wherein the outlet is defined at an end of the cavity opposite the opening and the inlet is defined between the opening and the outlet;
- wherein the pump core assembly comprises:
- an inner pump core disposed in the cavity, and
- an outer pump core couplied with the pump body at the openning;
- wherein the pumping channel is formed at least by a first hole defined in the inner pump core and a second hole defined in the outer pump core, and the first hole is in communication with the inlet and the outlet;
- and
- wherein the pump rod is arranged to do have a straight reciprocating motion in the pumping channel along a first axis so as to force fluid to flow from the inlet to the outlet by passing through the first hole.
A chain saw, comprising:
- a motor, a chain having a plurality of blades driven by the motor, and a pump for providing a lubricating fluid to the chain;
- wherein the pump comprises:
- a pump rod;
- a pump core assembly defining a pumping channel;
- and
- a pump body defining an inlet, an outlet, and a cavity having an opening at one end;
- wherein the outlet is defined at an end of the cavity opposite to the opening and the inlet is defined between the opening and the outlet;
- wherein the pump core assembly comprises:
- an inner pump core disposed in the cavity, and
- an outer pump core coupled with the pump body at the opening;
- wherein the pumping channel is formed at least by a first hole defined in the inner pump core and a second hole defined in the outer pump core, and the first hole is in communication with the inlet and the outlet;
- and
- wherein the pump rod is arranged to do have a straight reciprocating motion in the pumping channel along a first axis so as to force the lubricating fluid to flow from the inlet to the outlet by passing through the first hole.
Dependencies are inferred from the claim text.