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US 10,471,573 B2Granted
Impact tool
AssigneeMilwaukee Electric Tool Corporation
InventorsJames B. Howard, Jacob P. Schneider
Life of this patent
Estimating the term…
Abstract
An impact tool includes a housing, a motor supported in the housing, and a drive assembly for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece. The drive assembly includes an anvil, a hammer that is both rotationally and axially movable relative to the anvil, and a spring for biasing the hammer in an axial direction toward the anvil. The spring is rotationally unitized to the hammer for co-rotation therewith at all times during operation of the impact tool.
Claims18
An impact tool comprising:
- a housing;
- a motor supported in the housing;
- and
- a drive assembly for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece, the drive assembly including
- an anvil,
- a hammer that is both rotationally and axially movable relative to the anvil,
- a spring for biasing the hammer in an axial direction toward the anvil,
- a radially extending tab on one of the spring or the hammer, and
- a corresponding groove on the other of the spring or the hammer into which the radially extending tab is received,
- wherein the spring is rotationally unitized to the hammer for co-rotation therewith at all times during operation of the impact tool.
7 more elements
An impact tool comprising:
- a housing;
- a motor supported in the housing;
- and
- a drive assembly for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece, the drive assembly including:
- an anvil,
- a hammer that is both rotationally and axially movable relative to the anvil,
- a spring for biasing the hammer in an axial direction toward the anvil, wherein the spring includes a first end proximate the hammer, a second end opposite the first end, and a flat surface positioned at the second end,
- a thrust bearing positioned at the second end of the spring to permit relative rotation between the motor and the spring,
- a tab on one of the spring or the hammer, and
- a corresponding groove on the other of the spring or the hammer into which the tab is received for rotationally unitizing the spring to the hammer.
7 more elements
Dependencies are inferred from the claim text.