Cordless framing nailer

Patent metadata

Field	Value
Publication number	US-8939342-B2
Application number	US-201313947192-A
Country	US
Kind code	B2
Filing date	Jul 22, 2013
Priority date	Apr 3, 2008
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

A driving tool with a driver and a motor-driven flywheel that can be engaged by the driver to propel the driver along a driver axis. The driving tool includes a return mechanism with a rail onto which the driver is received. The rail extends parallel to the driver axis.

First claim

What is claimed is:

1. A driving tool comprising:
a frame defining a rotational axis and a driver axis;
a motor coupled to the frame;
a flywheel rotatably driven by the motor about the rotational axis;
a rail coupled to the frame;
a driver having a driver body and a driver member, the driver body being configured to engage the flywheel, the driver member being fixedly coupled to the driver body, the driver member being the output member of the driving tool, the driver being slidably mounted on the rail for movement along the driver axis between a returned position and an extended position; and
a follower coupled to the frame and movable between a first position, in which the follower drives the driver body into engagement with the flywheel to transfer energy from the flywheel to the driver to propel the driver relative to the frame along the driver axis, and a second position in which the follower, the driver and the flywheel are not engaged to one another.

2. The driving tool of claim 1 , wherein a return spring is mounted on the rail, the return spring biasing the driver toward the returned position.

3. The driving tool of claim 2 , wherein the return spring is a helical coil spring, wherein adjacent coils of the helical coil spring are spaced apart by a coil pitch and wherein at least two coil pitches are employed to define the helical coil spring.

4. The driving tool of claim 3 , wherein a first end of the helical coil spring adjacent the driver employs a first coil pitch, wherein a second, opposite end of the helical coil spring employs a second coil pitch and wherein the first coil pitch is larger than the second coil pitch.

5. The driving tool of claim 4 , wherein the coil pitch varies between the first coil pitch and the second coil pitch between the first and second ends.

6. The driving tool of claim 5 , wherein the coil pitch progressively decreases with decreasing distance to the second end.

7. The driving tool of claim 2 , wherein the return spring is a helical coil spring that comprises a plurality of twisted wires.

8. The driving tool of claim 2 , further comprising an impact absorber disposed between the frame and the return spring.

9. The driving tool of claim 8 , wherein the impact absorber is received over the rail.

10. The driving tool of claim 1 , further comprising a nosepiece into which the driver is partly received, wherein the rail is movably coupled to the frame such that the nosepiece guides the driver as the driver is moved from the returned position to the extended position.

11. The driving tool of claim 10 , further comprising a magazine coupled to the nosepiece, the magazine being configured to hold a plurality of fasteners that are sequentially dispensed into the nosepiece, the driver member being configured to sequentially drive the fasteners through the nosepiece into a workpiece.

12. The driving tool of claim 1 , wherein the driver member is a blade.

13. The driving tool of claim 1 , wherein the driver body and the driver member are two discrete components that are assembled to one another.

14. The driving tool of claim 1 , wherein the rail is pivotably coupled to the frame.

15. A driving tool comprising:
a frame defining a rotational axis and a driver axis;
a motor coupled to the frame;
a flywheel rotatably driven by the motor about the rotational axis;
a rail pivotably coupled to the frame;
a driver having a driver body and a driver member, the driver body being configured to engage the flywheel, the driver member being fixedly coupled to the driver body, the driver member being the output member of the driving tool, the driver being slidably mounted on the rail for guided movement on the rail between a returned position and an extended position; and
a follower coupled to the frame and movable between a first position, in which the follower drives the driver body into engagement with the flywheel when the driver is in the returned position to transfer energy from the flywheel to the driver to thereby propel the driver relative to the frame along the driver axis toward the extended position, and a second position in which the follower, the driver and the flywheel are not engaged to one another.

16. The driving tool of claim 15 , wherein a return spring is mounted on the rail, the return spring biasing the driver toward the returned position.

17. The driving tool of claim 16 , wherein the return spring is a helical coil spring, wherein adjacent coils of the helical coil spring are spaced apart by a coil pitch and wherein at least two coil pitches are employed to define the helical coil spring.

18. The driving tool of claim 17 , wherein a first end of the helical coil spring adjacent the driver employs a first coil pitch, wherein a second, opposite end of the helical coil spring employs a second coil pitch and wherein the first coil pitch is larger than the second coil pitch.

19. The driving tool of claim 18 , wherein the coil pitch varies between the first coil pitch and the second coil pitch between the first and second ends.

20. The driving tool of claim 19 , wherein the coil pitch progressively decreases with decreasing distance to the second end.

21. The driving tool of claim 16 , wherein the return spring is a helical coil spring that comprises a plurality of twisted wires.

22. The driving tool of claim 16 , further comprising an impact absorber disposed between the frame and the return spring.

23. The driving tool of claim 22 , wherein the impact absorber is received over the rail.

24. The driving tool of claim 15 , further comprising a nosepiece into which the driver is partly received, wherein the rail is movably coupled to the frame such that the nosepiece guides the driver as the driver is moved from the returned position to the extended position.

25. The driving tool of claim 24 , further comprising a magazine coupled to the nosepiece, the magazine being configured to hold a plurality of fasteners that are sequentially dispensed into the nosepiece, the driver member being configured to sequentially drive the fasteners through the nosepiece into a workpiece.

26. The driving tool of claim 15 , wherein the driver member is a blade.

27. The driving tool of claim 15 , wherein the driver body and the driver member are two discrete components that are assembled to one another.

28. A driving tool comprising:
a frame defining a rotational axis and a driver axis;
a nosepiece coupled to the frame;
a motor coupled to the frame;
a flywheel rotatably driven by the motor about the rotational axis;
a rail pivotably coupled to the frame;
a driver having a driver body and a driver member fixed to the driver body, the driver being mounted on the rail such that the rail guides the driver for movement between a returned position and an extended position, the driver member being received in the nosepiece when the driver is in the extended position, the driver being slidably mounted on the rail for guided movement on the rail between a returned position and an extended position;
a follower coupled to the frame and movable between a first position, in which the follower drives the driver body into engagement with the flywheel when the driver is in the returned position to transfer energy from the flywheel to the driver to thereby propel the driver relative to the frame along the driver axis toward the extended position, a

Assignees

• Black & Decker Inc

Inventors

• Brendel Lee M
• Gross Paul G
• Gregory Larry E

Classifications

• B25C5/15

  operated by electric power · CPC title

• B25C1/06 Primary

  operated by electric power · CPC title