Power tool having angled dry fire lockout

Patent metadata

Field	Value
Publication number	US-9649755-B2
Application number	US-201313986731-A
Country	US
Kind code	B2
Filing date	May 30, 2013
Priority date	May 31, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A fastening tool having a lockout mechanism which has a dry fire lockout which achieves a controlled lockout override. The lockout mechanism can be part of a fastening tool magazine, a pusher assembly or a nosepiece contact trip. The lockout mechanism can be an angled lockout, a torsion spring lockout, or a fixed member lockout. The fastening tool can have a method of controlling lockout override using a lockout control angle.

First claim

We claim:

1. A fastening device, comprising:
a magazine having a lockout mechanism;
the lockout mechanism having a lockout member adapted to receive an override force and configured to have a lockout control angle which has a value of less than 90°;
wherein the lockout control angle is measured from a lockout plane to a lockout arm axis;
wherein an axis of operation is configured opposite to the lockout control angle; and
wherein the lockout mechanism is configured to allow a lockout override and has an override resistance of 30 lbf or greater.

2. The fastening device according to claim 1 , wherein the lockout mechanism is an angled lockout.

3. The fastening device according to claim 1 , wherein the lockout mechanism is a torsion spring lockout.

4. The fastening device according to claim 1 , wherein the lockout mechanism further comprises a locking leg having the lockout control angle.

5. The fastening device according to claim 1 , wherein the lockout mechanism is a fixed member lockout.

6. The fastening device according to claim 1 , wherein the lockout control angle is in a range of from 0° to 66°.

7. The fastening device according to claim 1 , wherein the lockout control angle is in a range of from 15° to 35°.

8. The fastening device according to claim 1 , wherein the lockout mechanism provides an override resistance of 25 lbf or greater.

9. The fastening device according to claim 1 , wherein the lockout mechanism provides an override resistance of 50 lbf or greater.

10. The fastening device according to claim 1 , wherein the lockout mechanism provides an override resistance of 100 lbf or greater.

11. A method for controlling a lockout override of a fastening tool, comprising the steps of:
providing a contact trip having an axis of operation;
providing a lockout mechanism having a lockout member and adapted to lockout a contact trip, the lockout mechanism providing an override resistance;
configuring the lockout member to have a lockout control angle which is greater than zero, wherein the lockout control angle is measured from a lockout plane to a lockout arm axis and wherein an axis of operation is configured opposite to the lockout control angle;
moving the contact trip along the axis of operation toward a contact portion of the lockout member;
contacting the contact trip against the lockout member at the contact portion;
providing an override force by the contact trip to the lockout member, the lockout member preventing a lockout override when the override force is less than the override resistance; and
the lockout member allowing a lockout override when the override force is greater than the override resistance.

12. The method for controlling a lockout override of a fastening tool according to claim 11 , wherein the step of overriding further comprises a movement of the lockout member to allow a portion of the contact trip to pass a portion of the lockout member.

13. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
guiding a contact trip along an axis of operation which is perpendicular to a lockout plane.

14. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
providing a lockout having an override resistance in a range of from 30 lbf to 175 lbf.

15. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
providing a lockout having an override resistance in a range of from 45 lbf to 60 lbf.

16. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
providing a lockout control angle of less than 90°.

17. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
providing a lockout control angle in a range of from 15° to 30°.

18. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
providing a lockout control angle in a range of from 21° to 27°.

19. The method for controlling a lockout override of a fastening tool according to claim 11 , further comprising the step of:
providing a magazine for the fastening tool comprising the lockout.

20. A means of lockout override control for a fastening tool configured to allow a lockout override, comprising:
a means of exerting an override resistance force against a contact trip by a lockout member which contacts the contact trip at a lockout control angle which is greater than zero when the contact trip moves against the lockout member; and
wherein the lockout control angle is measured from a lockout plane to a lockout arm axis, and wherein an axis of operation is configured opposite to the lockout control angle.

Assignees

• Black & Decker Inc
• Black & Decker Inc

Inventors

• Gregory Larry E
• Baron Michael P
• Brendel Lee M
• Hagan Todd A
• Garber Stuart E

Classifications

• B25C1/008 Primary

  Safety devices · CPC title

• B25C1/005

  for rows of contiguous nails · CPC title

• B25C5/162

  with means for holding pusher out of position during re-loading · CPC title