Pneumatic chipping hammer and method of manufacture
First Claim
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1. A fluid operated power tool comprising:
- a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, a handle portion connected to the tool body having an inlet adapted to be connected to a source of fluid under pressure, a passageway in the handle portion and the tool body adapted to carry fluid under pressure from the inlet to the fluid motor in the tool body, at least a portion of the passageway being formed by a groove in the exterior of the handle portion, high temperature tape covering the groove, and an elastomeric material insert molded around the handle portion and covering the tape and groove.
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Abstract
A pneumatic power tool that includes fluid conveying passageways formed by casting grooves in the tool exterior and then molding an elastomeric material over the grooves to enclose the passageways.
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Citations
16 Claims
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1. A fluid operated power tool comprising:
- a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, a handle portion connected to the tool body having an inlet adapted to be connected to a source of fluid under pressure, a passageway in the handle portion and the tool body adapted to carry fluid under pressure from the inlet to the fluid motor in the tool body, at least a portion of the passageway being formed by a groove in the exterior of the handle portion, high temperature tape covering the groove, and an elastomeric material insert molded around the handle portion and covering the tape and groove.
- View Dependent Claims (4)
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2. A fluid operated power tool, comprising:
- a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, a handle portion connected to the tool body having an inlet adapted to be connected to a source of fluid under pressure, passageways in the handle portion and the tool body adapted to carry fluid under pressure from the inlet to the fluid motor in the tool body, at least a portion of the passageway being formed by a groove in the exterior of the tool body, high temperature tape covering the groove, and an elastomeric material insert molded around the tool body and covering the tape and groove.
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3. A fluid operated power tool comprising:
- a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, a handle portion connected to the tool body having an inlet adapted to be connected to a source of fluid under pressure, passageways in the handle portion and the tool body adapted to carry fluid under pressure from the inlet to the fluid motor in the tool body, at least a portion of the passageway in the handle portion being formed by a groove in the exterior thereof, at least a portion of the passageway in the tool body being formed by a groove in the exterior thereof, high temperature tape covering both of the grooves, and an elastomeric material insert molded around the handle portion and tool body and covering the tapes and grooves.
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5. A method of making a fluid operated power tool, including the steps of:
- forming a fluid motor assembly adapted to drive a tool, forming a fluid receiving portion for receiving fluid under pressure and carrying it to the motor assembly, said step of forming the fluid receiving portion including the steps of forming a fluid passage on the exterior of the fluid receiving portion opening along its length to the atmosphere, covering the fluid passage, and molding an elastomeric material around the fluid receiving portion and the covered fluid passage of sufficient thickness to withstand fluid pressure in the fluid passage.
- View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of making a fluid operated power tool, including the steps of:
- forming a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, forming a handle portion with a fluid inlet adapted to be connected to the tool body and carrying fluid under pressure from the inlet to the fluid motor in the tool body, the step of forming the handle portion including casting the handle portion with a fluid passage connected to the inlet exposed along its length to the periphery of the handle portion adapted to carry fluid under pressure to the motor, covering the fluid passage with a high temperature tape applied to the outside of the handle portion, placing the handle portion in a mold as an insert, flowing a thermosetting elastomeric material around the handle portion, and heating the mold until the elastomeric material has cured.
- View Dependent Claims (13, 14, 16)
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12. A method of making a fluid operated power tool, including the steps of:
- forming a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, forming a handle portion with a fluid inlet adapted to be connected to the tool body and carrying fluid under pressure from the inlet to the fluid motor in the tool body, the steps of forming the tool body including the step of casting the tool body with a fluid passage connected to the inlet exposed along its length to the exterior of the tool body, covering the fluid passage with a high temperature tape, placing the tool body in a mold as an insert, flowing an elastomeric thermosetting material around the tool body and over the fluid passage, and heating the mold until the elastomeric material is cured.
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15. A method of making a fluid operated power tool, including the steps of:
- forming a tool body adapted to receive a fluid motor for driving a tool carried by the tool body, forming a handle portion with a fluid inlet adapted to be connected to the tool body and carrying fluid under pressure from the inlet to the fluid motor in the tool body, the step of forming the handle portion including casting the handle portion with a fluid passage connected to the inlet exposed along its length to the periphery of the handle portion adapted to carry fluid under pressure to the motor, covering the fluid passage with a high temperature tape applied to the outside of the handle portion, placing the handle portion in a mold as an insert, flowing a thermosetting elastomeric material around the handle portion, heating the mold until the elastomeric material has cured, the step of forming the tool body including the step of casting the tool body with a fluid passage connected to the inlet exposed along its length to the exterior of the tool body, covering the fluid passage in the tool body with a high temperature tape, placing the tool body in a mold as an insert, flowing an elastomeric thermosetting material around the tool body and over the fluid passage therein and heating the mold until the elastomeric material is cured.
Specification