Electronic clutch for tool chuck with power take off and dead spindle features
AssigneeBlack & Decker Inc.
InventorsCraig A. Schell, Robert S. Gehret, Daniel Puzio
Life of this patent
Estimating the term…
Abstract
A power driver may include a motor that rotates upon receiving an input current. A tool chuck may have chuck jaws to hold an accessory. The tool chuck may be coupled to the motor. A power take off mechanism may be connected between the motor and the tool chuck. The power take off mechanism may be adjustable into a CHUCK MODE to one of open and close the chuck jaws while the motor rotates. An electronic clutch may interrupt the input current to the motor if the power take off mechanism is in the CHUCK MODE and if the input current exceeds a trip value.
Claims24
A power driver comprising:
- a motor that rotates upon receiving an input current;
- a tool chuck having chuck jaws to hold an accessory, the tool chuck being coupled to the motor;
- a power take off mechanism connected between the motor and the tool chuck, the power take off mechanism being adjustable into a CHUCK MODE to one of open and close the chuck jaws while the motor rotates;
- an electronic clutch to interrupt the input current to the motor if the power take off mechanism is in the CHUCK MODE and if the input current exceeds a trip value.
A power driver comprising:
- a motor that receives an input current to drive a tool chuck supporting chuck jaws;
- and
- a control circuit to selectively interrupt the input current to the motor, the control circuit to receive
- a current value input indicating the input current to the motor, and
- a mode input indicating whether the power driver is set to operate in CHUCK MODE in which the motor rotates to one of open and close the chuck jaws;
- wherein the control circuit interrupts the input current to the motor if the mode input indicates that the power driver is set to operate in the CHUCK MODE and if the current value input exceeds a trip value.
An electronic clutch for a power driver having a motor that receives an input current to drive a tool chuck supporting chuck jaws, the electronic clutch comprising:
- a control circuit to receive
- a first input indicative of a clamping force applied by the chuck jaws, and
- a second input to indicate whether the power driver is set to operate in a CHUCK MODE in which the motor rotates to one of open and close the chuck jaws;
- the control circuit interrupting the input current to the motor if the second input indicates that the power driver is set to operate in the CHUCK MODE and if the first input exceeds a trip value.
An electronic clutch for a power driver having a motor to drive a tool chuck supporting chuck jaws, the electronic clutch comprising:
- a control circuit to receive
- a mode input to indicate whether the power driver is set to operate in a CHUCK MODE in which the motor rotates to one of open and close the chuck jaws, and
- a clamping force input to indicate a clamping force applied by the chuck jaws;
- the control circuit to limit a torque output of the motor if the mode input indicates that the power driver is set to operate in the CHUCK MODE, and if the clamping force input exceeds a trip value.
Dependencies are inferred from the claim text.