Power tools

• US 7,328,752 B2
• Filed: 10/16/2006
• Issued: 02/12/2008
• Est. Priority Date: 04/29/1999
• Status: Expired due to Fees

• Current Assignee: David S. D'Ascenzo, Stephen F Gass
• Original Assignee: David S. D'Ascenzo, Stephen F Gass
• Inventors: D'Ascenzo, David S., Gass, Stephen F.
• Primary Examiner(s): CHEUNG, WILLIAM K
• Application Number:
  US11/581,846
• Publication Number:
  US 20070034394A1
• Time in Patent Office: 484 Days
• Field of Search: 173/176, 173/217, 173/2, 173/20, 173/213, 173/178, 814/67, 814/69
• US Class Current: 173/2
• CPC Class Codes: B23B 2260/128 Sensors
• CPC Class Codes: B23B 31/123 with locking arrangements locking arrangements for chucks with simultaneously-acting jaws moving radially actuated by one or more spiral grooves B23B31/16041
• CPC Class Codes: B23B 45/008 Gear boxes, clutches, bearings, feeding mechanisms or like equipment
• CPC Class Codes: B23B 49/008 Attached to the nose of the drilling machines
• CPC Class Codes: B23G 1/18 Machines with one working spindle
• CPC Class Codes: 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
• CPC Class Codes: B25B 23/0064 Means for adjusting screwing depth
• CPC Class Codes: B25B 23/147 specially adapted for electrically operated wrenches or screwdrivers
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
• CPC Class Codes: B25F 5/001 Gearings, speed selectors, clutches or the like specially adapted for rotary tools
• CPC Class Codes: B25F 5/003 Stops for limiting depth in rotary hand tools for drilling tools: B23B49/003
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• CPC Class Codes: B25F 5/021 with guiding devices guiding devices for hand tools on stands or supports B25H1/0078
• CPC Class Codes: B25H 1/0092 by optical means

Abstract

An electrically powered hand tool is disclosed. The tool includes a motor, a power source, a work element and a controller. Various alternative features, embodiments and operative configurations are disclosed. The electrically powered hand tool may be a drill/driver configured to interrupt the rotation of the work element responsive to detection of a torque that exceeds a predetermined torque threshold.

Claims

1. An electrically powered hand drill/driver, comprising:

a rotatable work element adapted to receive a bit;

a motor adapted to drive the rotation of the work element during powered operation of the drill/driver;

a body having a housing containing at least the motor and a handle adapted to be gripped by a user while operating the drill/driver;

a power source adapted to deliver power to the motor;

at least one user input;

wherein the at least one user input includes an actuator adapted to be depressed by a user to select powered operation of the drill/driver; and

a controller electrically connected to the power source and the motor and configured to regulate rotation of the work element by controlling delivery of power to the motor from the power source, wherein the controller is adapted to cause rotation of the work element responsive to depression of the actuator, wherein the controller is further adapted to regulate the applied torque to the work element responsive to user-applied pressure to the body of the drill/driver, and wherein the controller is further adapted, at least in a first operating mode, to interrupt the rotation of the work element responsive to detection of a torque that exceeds a predetermined torque threshold.

2. The drill/driver of claim 1, wherein the drill/driver further comprises a torque sensor adapted to measure the torque.

3. The drill/driver of claim 1, wherein the torque sensor detects the amount of energy drawn.

4. The drill/driver of claim 1, wherein the predetermined torque threshold is selected by a user from a range of torque thresholds.

5. The drill/driver of claim 1, wherein the drill/driver further includes a manual torque control adapted to regulate the torque applied to the work element.

6. The drill/driver of claim 1, further comprising an electronic torque control for the motor, wherein the electronic torque control is regulated by the controller responsive to user inputs and signals from the torque sensor.

7. The drill/driver of claim 1, wherein the controller is adapted to be selectively configured between a plurality of operating modes that include the first operating mode and at least a second operating mode.

8. The drill/driver of claim 7, wherein in the second operating mode, the controller causes continuous rotation of the work element responsive to continued depression of the actuator regardless of the applied torque.

9. The drill/driver of claim 7, wherein the drill/driver further includes a user interface having a display adapted to display information to a user about the operating mode of the controller.

10. The drill/driver of claim 9, wherein the user interface includes a plurality of user input controls in communication with the controller, and further wherein the controller is adapted to transition between the plurality of operating modes responsive at least in part to inputs from the plurality of user input controls.

11. The drill/driver of claim 1, wherein the handle includes a base, wherein the power source includes a rechargeable battery, and further wherein the power source is adapted to be coupled to the base of the handle.

12. An electrically powered hand drill/driver, comprising:

a rotatable work element adapted to receive a bit;

a motor adapted to drive the rotation of the work element during powered operation of the drill/driver;

a body having a housing containing at least the motor and a handle adapted to be gripped by a user while operating the drill/driver;

a power source adapted to deliver power to the motor;

a torque sensor adapted to measure torque applied to or by the work element;

at least one user input;

wherein the at least one user input includes an actuator adapted to be depressed by a user to select powered operation of the drill/driver; and

a controller electrically connected to the power source, the torque sensor, and the motor and configured to regulate rotation of the work element by controlling delivery of power to the motor from the power source, wherein the controller is adapted to cause rotation of the work element responsive to depression of the actuator, and wherein upon detection of an applied torque that exceeds a predetermined torque threshold, the controller is further adapted, at least in a first operating mode, to reduce but not interrupt application of the applied torque.

13. The drill/driver of claim 12, wherein the reduction of the applied torque by the controller includes reducing the applied torque by a predetermined amount.

14. The drill/driver of claim 12, wherein the reduction of the applied torque by the controller includes reducing the applied torque according to a predetermined ramp profile.

15. The drill/driver of claim 12, wherein the reduction of the applied torque by the controller is correlated to the degree to which the applied torque exceeds the predetermined torque threshold.

16. The drill/driver of claim 12, further comprises a manual torque control.

17. The drill/driver of claim 12, wherein the torque sensor is adapted to measure torque applied by detecting the amount of energy drawn.

18. The drill/driver of claim 12, further comprising a user interface with an electronic display and at least one user input control.

19. The drill/driver of claim 18, wherein the at least one user input control is adapted to select the predetermined torque threshold.