# US 2019/0168364 A1 · Electric pulse tool with controlled reaction force > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0168364 A1 - Document ID: US20190168364A1 - Status: Published application - Kind: A1 - Application number: 16/313,809 - Filed: 2017-06-19 - Published: 2019-06-06 - Earliest claimed: 2016-06-30 - Assignees: Atlas Copco Industrial Technique AB - Applicants: Atlas Copco Industrial Technique AB - Inventors: Adam KLOTBLIXT - Web page: https://patentgrep.com/patent/US20190168364A1 ## CPC - B25B 23/1475: {for impact wrenches or screwdrivers} - B25B 21/00: Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) - B25B 21/02: with means for imparting impact to screwdriver blade or nut socket - B25B 23/147: specially adapted for electrically operated wrenches or screwdrivers - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING ## Abstract An electric power tool, configured to perform tightening operations where torque is delivered in a series of pulses, includes an electrical motor adapted to drive a rotating shaft of the electric power tool, and an angle sensor for sensing a parameter related to an angular displacement of the electric power tool. The electric motor is adapted to be fed with a train of controlled current pulses. The electric power tool is adapted to control a current supplied in the current pulses based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool. ## Claims ### Claim at position 1 1-11. (canceled) ### Claim 12 An electric power tool configured to perform tightening operations where torque is delivered in a series of pulses, the electric power tool comprising: an electrical motor adapted to drive a rotating shaft of the electric power tool, the electric motor adapted to be fed with a train of controlled current pulses; and an angle sensor for sensing a parameter related to an angular displacement of the electric power tool, wherein the electric power tool is adapted to control a current supplied in the current pulses based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool. ### Claim 13 (depends on 12) The electric power tool according to claim 12, wherein at least one of a duration and magnitude of the current pulses are controlled based on the output signal from the angle sensor. ### Claim 14 (depends on 12) The electric power tool according to claim 12, wherein the angle sensor is a sensor adapted to sense at least one of an angular displacement, an angular velocity or an angular acceleration. ### Claim 15 (depends on 13) The electric power tool according to claim 13, wherein the angle sensor is a sensor adapted to sense at least one of an angular displacement, an angular velocity or an angular acceleration. ### Claim 16 (depends on 12) The electric power tool according to claim 12, wherein the electric power tool further comprises a gear arrangement between the electric motor and the rotating shaft. ### Claim 17 (depends on 13) The electric power tool according to claim 13, wherein the electric power tool further comprises a gear arrangement between the electric motor and the rotating shaft. ### Claim 18 (depends on 14) The electric power tool according to claim 14, wherein the electric power tool further comprises a gear arrangement between the electric motor and the rotating shaft. ### Claim 19 (depends on 15) The electric power tool according to claim 15, wherein the electric power tool further comprises a gear arrangement between the electric motor and the rotating shaft. ### Claim 20 (depends on 12) The electric power tool according to claim 12, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 21 (depends on 13) The electric power tool according to claim 13, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 22 (depends on 14) The electric power tool according to claim 14, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 23 (depends on 15) The electric power tool according to claim 15, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 24 (depends on 16) The electric power tool according to claim 16, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 25 (depends on 17) The electric power tool according to claim 17, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 26 (depends on 18) The electric power tool according to claim 18, wherein the angle sensor is at least one of a gyro sensor or an accelerometer. ### Claim 27 (depends on 12) The electric power tool according to claim 12, wherein the power tool is adapted to control the energy within a sensed pulse. ### Claim 28 (depends on 12) The electric power tool according to claim 12, wherein the power tool is adapted to control the energy between a sensed pulse and an upcoming pulse. ### Claim 29 A method of controlling an electric power tool, configured to perform tightening operations where torque is delivered in a series of pulses to tighten screw joints, the electric power tool comprising an electrical motor adapted to drive a rotating shaft of the electric power tool, the electric motor adapted to be fed with a train of controlled current pulses, the electric power tool further comprising an angle sensor for sensing a parameter related to an angular displacement of the electric power tool, wherein a current supplied in the current pulses is controlled based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool. ### Claim 30 (depends on 29) A computer program product comprising computer program code adapted to, when executed on a computer, cause the computer to perform the method according to claim 29. ### Claim 31 A controller controlling an electric power tool, configured to perform tightening operations where torque is delivered in a series of pulses to tighten screw joints, the electric power tool comprising an electrical motor adapted to drive a rotating shaft of the electric power tool, the electric motor adapted to be fed with a train of controlled current pulses, the electric power tool further comprising an angle sensor for sensing a parameter related to an angular displacement of the electric power tool, wherein the controller is adapted to control a current supplied in the current pulses based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool.