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US 5,607,023 AGranted
Impact absorption mechanism for power tools
AssigneeMilwaukee Electric Tool Corporation
InventorBernhard Palm
Life of this patent
Estimating the term…
Abstract
Disclosed herein is an impact absorption mechanism and a power tool including an impact absorption mechanism. When a tool bit binds a high energy impulse of short duration is generated that may damage components of the power tool. The impact absorption mechanism absorbs this high energy impulse and prevents damage to other components of the power tool.
Claims7
A handheld portable tool comprising:
- a housing;
- a first shaft rotatably mounted in the housing;
- a motor shaft that stalls at a stall torque;
- a spindle;
- a tool bit driven by the spindle and adapted to operate on a workpiece;
- means, mounted on the first shaft and connected to the spindle, for converting rotational motion of the first shaft to reciprocal motion of the spindle;
- and
- means for drivingly connecting the motor shaft to the first shaft and providing slippage between the motor shaft and the first shaft if there is binding of the spindle, wherein said means for providing slippage includes a clutch drivingly connecting said motor shaft to said first shaft, said clutch providing slippage between said motor shaft and said first shaft at a slippage torque that is equal to or greater than the stall torque of said motor shaft.
5 more elements
A handheld portable tool comprising:
- a housing;
- a shaft rotatably mounted in the housing;
- a motor having a stall torque;
- and
- a clutch drivingly connecting said motor to said shaft, said clutch providing slippage between said motor and said shaft at a torque that is equal to or greater than the stall torque of said motor.
2 more elements
Dependencies are inferred from the claim text.