# US 9,009,979 B2 · Folding blade knife with a system for locking the blade in an unfolding position

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- Number: US 9,009,979 B2
- Document ID: US9009979B2
- Status: Granted
- Kind: B2
- Application number: 13/765,092
- Filed: 2013-02-12
- Published: 2013-08-22
- Granted: 2015-04-21
- Earliest claimed: 2012-02-21
- Assignees: Wildsteer
- Applicants: Wildsteer
- Inventors: Edouard De Buyer-Mimeure
- Web page: https://patentgrep.com/patent/US9009979B2

## CPC

- B26B 1/04: lockable in adjusted position
- B26B 1/042: {by a spring biased locking lever pivoting around an axis parallel to the pivot axis of the blade}
- B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H)

## Abstract

A system for locking a blade of a knife with a folding blade in an unfolded position includes a handle-forming part for a user to grasp, and a blade pivotably mounted relative to this handle-forming part. The blade pivots to adopt either an unfolded position for use, or a foldaway position for storage, wherein it is partially concealed in the handle-forming part. A first locking element on a top of the knife, cooperates with the blade and adopts a first position of locking the blade in the unfolded position and a second release position of the blade A second locking element cooperating with the first locking element, adopts a first position of locking the first locking element in the first locking position of the blade, and a second release position wherein the second locking element forces the first locking element to adopt the second release position of the blade.

## Claims

### Claim 1

A folding knife comprising:
a handle for a user to grasp the knife, a blade pivotably mounted relative to the handle and pivotable between an unfolded position for use and a foldaway position for storage within the handle, and a system for locking the blade in the unfolded position, wherein the system comprises:
a leaf spring provided on a top of the knife to adopt either
a locking position in which a recess of the leaf spring cooperates with a finger provided on a heel of the blade to lock the blade in its unfolded position, or
a release position releasing the blade,
a first component pivotably mounted on the handle to adopt either
a locking position in which a hook of the first component cooperates with a lug provided on a lateral part of the leaf spring in order to lock the leaf spring in the locking position of the leaf spring, or
a release position in which an eccentric part of the first component cooperates with the leaf spring in order to force the leaf spring to adopt the release position of the leaf spring, and
the first component comprises a lever to move the first component between the locking position and the release position of the first component.

### Claim 2 (depends on 1)

The folding knife of claim 1, further comprising a second component pivotably mounted on the handle, the second component comprising an abutment cooperating, when the second component is in a locking position, to prevent rotation of the first component, and a lever to move the second component between the locking position and a release position of the second component.

### Claim 3 (depends on 2)

The folding knife of claim 2, wherein the first component comprises a boss for the second component to be snapped on.

### Claim 4 (depends on 2)

The folding knife of claim 2, wherein the leaf spring is reversible in position and the first component and the second component are capable of being mounted on either side of the handle.

### Claim 5 (depends on 1)

The folding knife of claim 1, wherein the lever of the first component serves, when the first component is in the locking position, as a guard to protect a hand of the user.