Patent ID: 9731408
Date: 2017-08-15
CPC Classifications: B25C,Y10T

Claim:
1. A method for driving a fastening element into a substrate, comprising placing the fastening element in contact with a device comprising a mechanical-energy storage device for storing mechanical energy; an energy-transfer element that can move between a starting position and a setting position for transferring energy from the mechanical-energy storage device to the fastening element; an energy-transfer mechanism for transferring energy from an energy source to the mechanical-energy storage device, wherein the energy-transfer mechanism comprises a motor operable in a tensioning direction against a load torque that is exerted by the mechanical-energy storage device on the motor and operable essentially load-free in a restoring direction opposite the tensioning direction; and, a motor control mechanism comprising power electronics for controlling the motor, wherein the motor control mechanism can regulate the current intensity received by the motor to a specified desired current intensity, for rotation of the motor in the tensioning direction, and, can regulate the rotational speed of the motor to a specified desired rotational speed, for rotation of the motor in the restoring direction; and, operating the device, wherein the energy-transfer element moves between a starting position and a setting position and transfers energy from the mechanical-energy storage device to the fastening element, driving the fastening element into the substrate.