Vibration dampening system for a power tool and in particular for a powered hammer
AssigneeBlack & Decker Inc.
InventorsRobert Alan Usselman, Benjamin Schmidt
Life of this patent
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Abstract
The present invention relates to a method for controlling a power tool comprising a housing, an electric motor, a tool holder for supporting a tool bit and a conversion mechanism for converting the rotational movement of the output shaft of the motor into a reciprocating movement of the tool bit when being supporting in the tool holder, wherein oscillations of an element of the power tool are detected, wherein a quantity characterizing the oscillations is monitored and wherein the rotational speed of the electric motor is controlled such that the quantity does not exceed a preset value.
Claims17
A method of controlling a power tool comprising:
- a housing,
- an electric motor,
- a tool holder for supporting a tool bit and
- a conversion mechanism for converting the rotational movement of the output shaft of the motor into a reciprocating movement of the tool bit when being supporting in the tool holder,
- wherein oscillations of an element of the power tool are detected,
- wherein a quantity characterizing the oscillations is monitored and
- wherein the rotational speed of the electric motor is controlled such that the quantity does not exceed a preset value.
A Power tool comprising:
- a housing,
- an electric motor,
- a tool holder for supporting a tool bit and
- a conversion mechanism for converting the rotational movement of the output shaft of the motor into a reciprocating movement of the tool bit when being supporting in the tool holder,
- a detection device for detecting oscillations of an element of the tool wherein the device outputs a signal characterizing the oscillations, and
- a control unit coupled with the electric motor and the detection device, the unit being adapted such that the rotational speed of the electric motor is controlled so that a quantity characterizing the oscillations and determined based on the signal does not exceed a preset value.
Dependencies are inferred from the claim text.