Patent ID: 11919141
Assignee: INGERSOLL-RAND INDUSTRIAL U.S., INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. An electric tool, comprising:
an electric motor disposed within a tool housing, the electric motor configured to supply a torque;
a torque multiplier coupled to the electric motor for increasing the torque to a final output torque, the final output torque for tightening a fastener;
a reaction arm coupled to the torque multiplier for bracing the electric tool against a workpiece while the fastener is tightened by the final output torque;
a first handle graspable by one hand of an operator, the first handle connected to the tool housing;
a first trigger switch disposed on the first handle;
a second handle graspable by another hand of the operator, the second handle connected to the tool housing, the second handle located between the first handle and the reaction arm;
a second trigger switch disposed on the second handle;
a wireless transmitter disposed on the second handle and coupled to the second trigger switch, the wireless transmitter transmitting a first wireless signal when the second trigger switch is pressed;
a wireless receiver disposed on the tool housing; and
a controller coupled to the first trigger switch and the wireless receiver,
wherein the controller enables the electric motor only while the first trigger switch is pressed and while either the wireless receiver receives the first wireless signal or a second wireless signal from a supervisory control system indicating the second trigger switch is pressed to prevent the operator from contacting the reaction arm with either of the one hand or the other hand while the controller enables the electric motor.