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US 7,395,875 B2Granted
Rechargeable battery-operated hand machine tool
AssigneeRobert Bosch GmbH
InventorsHarald Krondorfer, Volker Bosch
Life of this patent
Estimating the term…
Abstract
The invention is based on a rechargeable battery-operated hand machine tool (10) having an electric drive motor (18) accommodated in a housing (12) and powered by a rechargeable battery (20), which motor is used to drive a tool (16), and having an actuating means (14) for switching the drive motor (18) on and off. A mechanism (22) is provided, which is capable of reducing the discharging of the battery (20) during operation.
Claims13
A battery operated hand-held machine tool, comprising a housing;
- an electric drive motor disposed in said housing to be powered by a battery for driving a tool;
- actuating means for switching said drive motor so as to adjust said drive motor to positions between on and off positions;
- and user-operable mode selection means actuable for selection of an operating mode enabling motor operation for maximum dynamics with relatively rapid battery discharge, and an energy-saving mode for motor operation with reduced battery discharge, said mode selection means being additional to and separate from a user-operable set point adjuster, for setting a motor speed or torque, with which the machine tool is provided.
A battery operated hand-held machine tool, comprising a housing;
- an electric drive motor disposed in said housing to be powered by a battery for driving a tool;
- actuating means for switching said drive motor so as to adjust said drive motor to positions between on and off positions;
- and user-operable mode selection means actuable for selection of an operating mode enabling motor operation for maximum dynamics with relatively rapid battery discharge, and an energy-saving mode for motor operation with reduced battery discharge, said mode selection means being additional to and separate from a user-operable set point adjuster, for setting a motor speed or torque, with which the machine tool is provided, wherein said user operable mode selection means is configured so that the energy-saving mode is achievable by adjusting at least one of an acceleration of the tool, an idling speed of said drive motor and an efficiency of operation of said drive motor.
Dependencies are inferred from the claim text.