Two-piece hammer for impact tool
AssigneeMilwaukee Electric Tool Corporation
InventorsYan Qiang LI, Kevin K. TAYLOR, Leonard F. MIKAT-STEVENS, Connor M. TEMME
Life of this patent
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Abstract
An impact tool includes a housing, a motor supported within the housing, a drive assembly configured to convert a continuous rotational input from the motor to intermittent applications of torque on a workpiece, and first and second impact members supported on the drive assembly and configured to deliver impacts to one another. The first impact member includes a core made of a first material having a first hardness, and a sleeve surrounding the core and made of a second material having a second hardness different than the first hardness. The first hardness is less than the second hardness.
Claims20
An impact tool comprising:
- a housing;
- a motor supported within the housing;
- a drive assembly configured to convert a continuous rotational input from the motor to intermittent applications of torque on a workpiece;
- and
- first and second impact members supported on the drive assembly and configured to deliver impacts to one another, the first impact member including
- a core made of a first material having a first hardness, and
- a sleeve surrounding the core and made of a second material having a second hardness different than the first hardness,
- wherein the first hardness is less than the second hardness.
An impact tool comprising:
- a housing;
- a motor supported within the housing;
- a drive assembly configured to convert a continuous rotational input from the motor to intermittent applications of torque on a workpiece;
- and
- first and second impact members supported on the drive assembly and configured to deliver impacts to one another, the first impact member having a surface hardness and an internal hardness less than the surface hardness,
- wherein the surface hardness is configured to be approximately 60 HRC, and
- wherein the internal harness is configured to be approximately 38 HRC.
An impact member for use with a power tool, the impact member comprising:
- a core having a surface hardness and an internal hardness less than the surface hardness;
- a sleeve surrounding the core, the sleeve having a generally uniform hardness that is at least 10% less than the surface hardness of the core and at least 10% greater than the internal hardness of the core;
- and
- a lug integrally formed with one of the core or the sleeve,
- wherein the lug is configured to experience an impact force and withstand repeated impacts.
Dependencies are inferred from the claim text.