Safety knife with slidable grip

Patent metadata

Field	Value
Publication number	US-11433563-B2
Application number	US-202016999653-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Aug 23, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

A safety knife functions as both a box cutter and a separate line cutter. A slidable grip is manually displaceable between two stable safety positions. In one safety position, the grip obstructs access to a forwardly projecting blade. In a second safety position, the grip obstructs access to the line cutter.

First claim

The invention claimed is:

1. A knife comprising:
a housing having a front defining a frontal blade opening and a rear defining a restricted blade opening;
a grip mounted to said housing and slidably displaceable therealong between a first position obstructing access to a first blade projecting from said frontal blade blade opening and a second position obstructing access to a second blade disposed in said restricted blade opening;
a first mechanism, comprising a spring-loaded member selectively engageable with first and second longitudinally spaced detents, which selectively secures said grip with respect to said housing in a stable engagement at the first position or the second position; and
a second mechanism, compsising a blade slider coupled to a blade carrier to which the first blade is fixedly mounted, which slidably projects the first blade for extension through said frontal blade opening at multiple exposed positions.

2. The knife of claim 1 wherein said housing defines a longitudinal slot and said grip is secured through said longitudinal slot to a slide member.

3. The knife of claim 2 wherein said slide member has a pair of longitudinally spaced detents, and a spring loaded lug is receivable in said detent and said housing mounts a laterally displaceable button which is manually moveable to withdraw the lug from a detent and allow said slide member to slide relative to the housing.

4. The knife of claim 1 further comprising a blade fixedly mounted for access through said restricted blade opening.

5. The knife of claim 1 further comprising a blade which is mounted to a longitudinally positionable slider and said housing mounts a longitudinally displaceable button which is moveable to change the position of said slider.

6. The knife of claim 1 wherein said grip further has a plurality of generally transversely extending serrations.

7. The knife of claim 1 wherein said grip has a rubber molded composition.

8. The knife of claim 1 wherein said grip has a quasi-U-shaped section which extends at opposed sides of said housing.

9. The knife of claim 1 wherein said front defines a nose-like configuration.

10. A knife comprising:
a housing having a front defining a frontal blade opening and a rear defining a restricted blade opening and accommodating a first blade and a second blade;
a grip mounted to said housing for slidable displacement therealong between a first position obstructing access to the first blade projecting from said frontal blade opening and a second position obstructing access to the second blade disposed adjacent said restricted blade opening;
a first mechanism for selectively securing said grip in a stable engagement at the first position or the second position; and
a second mechanism for slidably projecting the first blade for extension through said frontal blade opening at least one exposed position.

11. The knife of claim 10 wherein said housing defines a longitudinal slot and said grip is connected through said longitudinal slot to a slide member disposed in said housing.

12. The knife of claim 11 wherein said slide member has a pair of longitudinally spaced detents, and a spring loaded lock member receivable in a said detent and said housing mounts a laterally displaceable button which is manually moveable to withdraw the lock member from a detent and allow said slide member to slide relative to the housing.

13. The knife of claim 10 wherein said second blade is fixedly mounted for access through said restricted blade opening.

14. The knife of claim 10 wherein said first blade is mounted to a longitudinally positionable slide and said housing mounts a longitudinally displaceable button which is moveable to change the position of said slide.

15. The knife of claim 10 wherein said grip further has a plurality of generally transversely extending serrations.

16. The knife of claim 10 wherein said grip has a rubber molded composition.

17. The knife of claim 10 wherein said grip has a quasi-U-shaped section which extends at opposed sides of said housing.

18. The knife of claim 10 wherein said housing has a nose-like protuberance.

Assignees

• Acme United Corp

Inventors

• Seferi Nicholas L

Classifications

• B26B29/02 Primary

  Guards or sheaths for knives · CPC title

• B26B5/005

  specially adapted for cutting cardboard, or wall, floor or like covering materials · CPC title

• B26B5/003

  comprising retraction means for the blade or the blade holder · CPC title

• B25G1/06

  reversible or adjustable for position · CPC title

• B25G1/102

  the shape being specially adapted to facilitate handling or improve grip · CPC title