Power tool with impulse assembly including a valve
AssigneeMilwaukee Electric Tool Corporation
InventorsHugh A. Dales, Michael A. Verhagen, Troy C. Thorson, Jacob R. Seifert
Life of this patent
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Abstract
A power tool includes a housing, a motor positioned within the housing, an impulse assembly coupled to the motor to receive torque therefrom, the impulse assembly including a cylinder at least partially forming a chamber containing a hydraulic fluid, an anvil positioned at least partially within the chamber, and a hammer positioned at least partially within the chamber and engageable with the anvil for transferring rotational impacts to the anvil, the hammer including a through hole, and a valve configured to control flow of the hydraulic fluid through the through hole.
Claims17
A power tool comprising:
- a housing;
- a motor positioned within the housing;
- an impulse assembly coupled to the motor to receive torque therefrom, the impulse assembly including
- a cylinder at least partially forming a chamber containing a hydraulic fluid,
- an anvil positioned at least partially within the chamber, and
- a hammer positioned at least partially within the chamber and engageable with the anvil for transferring rotational impacts to the anvil, the hammer including a through hole;
- and
- a valve configured to control flow of the hydraulic fluid through the through hole;
- wherein the valve is configured to prevent the flow of the hydraulic fluid through the through hole in a first direction and to permit the flow of the hydraulic fluid through the through hole in a second direction;
- and
- wherein the hydraulic fluid flows in the first direction when the hammer moves away from the anvil, and wherein the hydraulic fluid flows in the second direction when the hammer moves toward the anvil.
A power tool comprising:
- a housing;
- a motor positioned within the housing;
- an impulse assembly coupled to the motor to receive torque therefrom, the impulse assembly including
- a chamber containing a hydraulic fluid,
- an anvil positioned at least partially within the chamber, and
- a hammer configured to reciprocate within the chamber, the hammer including a through hole;
- and
- a valve configured to control flow of the hydraulic fluid through the through hole;
- wherein the valve is configured to prevent the flow of the hydraulic fluid through the through hole in a first direction and to permit the flow of the hydraulic fluid through the through hole in a second direction;
- and
- wherein the hydraulic fluid flows in the first direction when the hammer moves away from the anvil, and wherein the hydraulic fluid flows in the second direction when the hammer moves toward the anvil.
A power tool comprising:
- a housing;
- a motor positioned within the housing;
- an impulse assembly coupled to the motor to receive torque therefrom, the impulse assembly including
- a cylinder at least partially forming a chamber containing a hydraulic fluid,
- an expansion piece coupled to the cylinder, the expansion piece defining an expansion chamber and a passageway fluidly communicating the chamber and the expansion chamber,
- a plug received within the expansion chamber, the plug movable to vary a volume of the expansion chamber,
- an anvil positioned at least partially within the chamber, and
- a hammer positioned at least partially within the chamber and engageable with the anvil for transferring rotational impacts to the anvil;
- wherein the expansion piece is threadably coupled to the cylinder.
Dependencies are inferred from the claim text.