Pole pruner
First Claim
Patent Images
1. A pole pruner, comprising:
- a rotary power supply;
a boom coupled at one end to the rotary power supply;
a cutting head coupled at an end of the boom opposite the rotary power supply, the boom adapted to communicate rotary power from the rotary power supply to the cutting head, the cutting head comprising;
a housing;
an input gear coupled to the housing and adapted to receive rotary power from the boom; and
an output gear coupled to the input gear and adapted to transfer the rotary power to a sprocket, the sprocket coupled to a cutting chain, the input gear and the output gear each formed having a reduced addendum relative to standard gearing.
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Accused Products
Abstract
A pole pruner that is lighter in weight than professional-grade pole pruners is provided, thereby making available a consumer-grade a pole pruner that is lightweight, low in cost, and easy to use. Additionally, a pole pruner according to one aspect of the present invention has a compact and contoured profile, thereby substantially preventing the pole pruner from becoming lodged or ensnared in tree limbs or other vegetation. Further, a pole pruner according to another aspect of the present invention includes a gear design that reduces noise and produces less vibration than prior pole pruners.
14 Citations
32 Claims
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1. A pole pruner, comprising:
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a rotary power supply;
a boom coupled at one end to the rotary power supply;
a cutting head coupled at an end of the boom opposite the rotary power supply, the boom adapted to communicate rotary power from the rotary power supply to the cutting head, the cutting head comprising;
a housing;
an input gear coupled to the housing and adapted to receive rotary power from the boom; and
an output gear coupled to the input gear and adapted to transfer the rotary power to a sprocket, the sprocket coupled to a cutting chain, the input gear and the output gear each formed having a reduced addendum relative to standard gearing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pole pruner, comprising:
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a rotary power supply;
a boom coupled at one end to the rotary power supply;
a cutting head coupled at an end of the boom opposite the rotary power supply, the boom adapted to communicate rotary power from the rotary power supply to the cutting head, the cutting head comprising;
an input gear assembly adapted to receive rotary power from the boom;
an output shaft gear assembly coupled to the input gear assembly and adapted to communicate rotary power from the input gear assembly to a sprocket;
a cutting chain coupled to the sprocket;
an oil pump adapted to engage the rotary power to draw oil from a reservoir; and
a gear housing having an integrally formed channel adapted to deliver the oil from the oil pump to the cutting chain. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A pole pruner, comprising:
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a rotary power supply;
a boom coupled at one end to the rotary power supply;
a cutting head coupled at an end of the boom opposite the rotary power supply, the boom adapted to communicate rotary power from the rotary power supply to the cutting head, the cutting head comprising;
a cutting chain;
a gear assembly adapted to communicate the rotary power to the cutting chain;
an oil reservoir disposed forwardly of the gear assembly and to one side of the cutting chain; and
an oil pump disposed outside of the oil reservoir and adapted to draw oil from the oil reservoir for delivery to the cutting chain, the oil pump disposed between the oil reservoir and the gear assembly. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A pole pruner, comprising:
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a power supply;
a boom coupled to one end to the power supply; and
a cutting head coupled to an end of the boom opposite the power supply, the boom adapted to communicate a rotational force from the power supply to the cutting head, the cutting head adapted to communicate the rotational force to a cutting chain, the cutting head configured having at least one surface converging inwardly as the profile extends toward the boom to facilitate extraction of the cutting head from vegetation. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification