SNAP-OFF BLADE KNIFE WITH SAFETY STOP

• US 20100088901A1
• Filed: 07/24/2009
• Published: 04/15/2010
• Est. Priority Date: 07/25/2008
• Status: Abandoned Application

• Current Assignee: University of Delaware
• Original Assignee: University of Delaware
• Inventors: Vinson, Jack R., Brisach, Daniel, Glancey, James L.
• Application Number:
  US12/509,085
• Publication Number:
  US 20100088901A1
• Time in Patent Office: Days
• US Class Current: 30/162
• CPC Class Codes: B26B 29/00 Guards or sheaths or guides for hand cutting tools; Arrangements for guiding hand cutting tools guards for hair clippers or dry shavers B26B19/38
• CPC Class Codes: B26B 5/002 segmented blades

Abstract

A snap-off blade knife having a handle including a proximal portion, a distal portion, and a handle axis extending between the proximal portion and the distal portion is disclosed. The knife also includes a blade slidingly disposed within the handle along the handle axis. The blade comprises a plurality of scored segments. A blade stop fixedly extends from the distal portion of the handle. The blade stop includes a stop arm disposed to engage blade to limit extension of the blade from the handle. A kit comprising the snap-off knife and a blade segment snap-off tool is also disclosed.

Claims

1. A snap-off blade knife comprising:

a handle having a proximal portion, a distal portion, and a handle axis extending between the proximal portion and the distal portion;

a blade slidingly disposed within the handle along the handle axis, the blade comprising a plurality of scored segments; and

a blade stop fixedly extending from the distal portion of the handle, wherein the blade stop includes a stop arm disposed to engage the blade to limit extension of the blade from the handle.

2. The snap-off blade knife according to claim 1, wherein the stop arm of the blade stop is angled relative to the blade to provide a point contact between the stop arm and the blade upon engagement of the blade with the stop arm.

3. The snap-off blade knife according to claim 1, wherein the stop arm of the blade stop is angled relative to the blade to provide a line contact between the stop arm and the blade upon engagement of the blade with the stop arm.

4. The snap-off blade knife according to claim 1, wherein not more than one full scored segment of the blade is extendible between the distal portion of the handle and the blade stop.

5. The snap-off blade knife according to claim 4, wherein the not more than one full scored segment of the blade comprises less than one full scored segment of the blade.

6. The snap-off blade knife according to claim 4, wherein the not more than one full scored segment of the blade comprises more than one full scored segment of the blade, but less than two full scored segments of the blade.

7. The snap-off blade knife according to claim 1, wherein the blade has a blade thickness and the blade stop has a stop thickness, greater than the blade thickness.

8. The snap-off blade knife according to claim 1, wherein the stop thickness is about four times greater than the blade thickness.

9. A kit comprising a snap-off blade knife and a blade segment snap-off tool, the kit comprising:

the snap-off blade knife comprising;

a handle having a proximal portion and a distal portion and a handle axis extending between the proximal portion and the distal portion;

a blade slidingly disposed within the handle along the handle axis, wherein the blade comprises a plurality of scored segments; and

a blade stop fixedly extending from the distal portion of the handle, wherein the blade stop includes a stop arm disposed to engage the blade to restrict extension of the blade from the handle; and

the blade segment snap-off tool including an elongated body having a tool proximal end and a tool distal end, the body having a slot extending therein from the tool distal end toward the tool proximal end for receiving a portion of at least one segment of the blade.

10. The kit according to claim 9, wherein the blade has a blade height and wherein the slot has a slot depth greater than the blade height.

11. A snap-off blade knife comprising:

a handle having a proximal portion, a distal portion, and a handle axis extending between the proximal portion and the distal portion;

a blade slidingly disposed within the handle along the handle axis, wherein the blade comprises a plurality of scored segments; and

means for preventing the blade from extending from the handle farther than a predetermined limit.

12. The snap-off blade knife according to claim 11, wherein the preventing means are fixedly coupled to the handle.

13. The snap-off blade knife according to claim 11, wherein the predetermined limit comprises not more than one full scored segment.

14. A kit for restricting extension of a blade in a snap-off sliding blade knife, the kit comprising:

a blade stop having a longitudinal section for securing to a non-moving portion of the sliding blade knife adjacent a non-cutting portion of the blade, and a stop arm connected to and angled relative to the longitudinal section for engaging and restricting extension of the blade; and

means for securing the blade stop to the non-moving portion of the sliding blade knife.

15. The kit of claim 14, wherein the means for securing the blade stop comprises an adhesive.

16. The kit of claim 15, further comprising a suitable amount of adhesive for securing the safety blade stop.

17. The kit of claim 14, wherein the means for securing the blade stop comprises shrink tubing and the kit further comprises a suitable length of shrink tubing for securing the safety blade stop.

18. The kit of claim 17, wherein the longitudinal section has at least one wide portion having a width greater than a remainder of the longitudinal section.

19. The kit of claim 18, wherein the wide portion is located at an end of the longitudinal section opposite the stop arm end.

20. The kit of claim 14, further comprising a blade segment snap-off tool including an elongated body having a tool proximal end and a tool distal end, the body having a slot extending therein from the tool distal end toward the tool proximal end for receiving a portion of at least one segment of the blade.