US 5,511,311 A · Knife with sliding base

Abstract

A knife having a sliding blade which may slide from a retracted position to an extended position. A locking member is pivotally connected to the blade and travels with the blade as the blade moves within a handle. A finger on the locking member engages with a recess to selectively lock the blade within the handle. By rocking the locking member forward, against the pressure of a spring, the blade is pushed outwardly from the handle until the finger automatically seats in an extension notch provided in the handle. Retraction of the knife is accomplished by rocking the locking member forward and pulling rearwardly thereon to force the blade back into the handle. A sheath for the knife engages the locking member to automatically lock the knife within the sheath upon insertion into the sheath. Upon extraction of the knife from the sheath, the blade is automatically extended.

Claims7

Dependent claims

A sheath for carrying a knife, tile knife having a handle with a retractable blade, said sheath comprising:

an elongated body member defining an elongated knife receptacle therein for receipt of a knife;
said body member including a first end and a second end opposite said first end, said first end being open to said knife receptacle;
said body member defining a front wall and a rear wall spaced opposite said front wall, said front wall and said rear wall being separated by said knife receptacle;
said body member further defining a first side wall and a second side wall spaced opposite said first side wall and being separated by said knife receptacle;
said second side wall being of shorter length than said first side wall;
said first side wall defining flange angled outwardly away from said knife receptacle at said first end of said body member:
said flange defining across therein for locking receipt of a portion of the knife;
and
said first side wall further defining an elongated channel therein adjacent said recess for receipt of a portion of the blade of the knife.

6 more elements

A knife and sheath combination, comprising:

a knife including a longitudinally extending knife blade;
an elongated knife handle defining a first end and a second end opposite said first end, said knife handle defining a longitudinally extending blade chamber therein for receipt of said knife blade;
said knife handle defining a blade passage at said first end of said knife handle, said blade passage being in communication with said blade chamber, said knife blade being movable with respect to said knife handle between an extended position extending outwardly from said handle through said knife passage and a retracted position substantially within said blade chamber;
a locking member connected to said knife blade for moving to a release position to allow movement of said knife blade with respect to said knife handle between said extended and retracted positions;
a sheath having an elongated body member defining an elongated knife chamber therein for receipt of said knife handle and said knife blade;
said body member including a first end and a second end opposite said first end, said first end being open and communication with said knife chamber;
a locking member engagement structure connected to said body member for engaging said locking member, such that upon withdrawal of said knife handle from said knife chamber, said locking member engagement structure engages said locking member to cause said locking member to move to said release position such that said knife blade is extended from said knife handle as said knife is withdrawn from said sheath.

4 more elements

Dependencies are inferred from the claim text.

Knife with sliding base

Life of this patent

Knife with sliding base

Life of this patent

Abstract

Claims7