Folding knife with locking linkage assembly

A folding knife, comprising:

• a handle comprising a side wall having a side surface;
• a protrusion extending laterally from the side surface of the side wall, the protrusion having a side surface and an edge portion extending laterally from the side surface of the side wall to the side surface of the protrusion, the edge portion comprising a first surface portion and a second surface portion, wherein the second surface portion is positioned forward of the first surface portion and extends downwardly at an angle relative to the first surface portion, wherein the second surface portion is configured as a locking surface,
• a blade having a tang portion comprising a locking edge portion, the blade being translatable relative to the handle between a storage position and a use position;
• a linkage assembly pivotably coupling the handle to the blade, the linkage assembly including a first linking element being pivotably coupled to the tang portion at a first pivot axis and to the protrusion at a second pivot axis, and a second linking element being pivotably coupled to the tang portion at a third pivot axis and to the protrusion at a fourth pivot axis;
• a locking mechanism comprising a locking member movable between an unlocked position and a locked position in which the locking member engages the first linking element to resist pivoting of the linkage assembly when the blade in the use position;
• and
• wherein when the blade is in the use position, the locking surface engages the locking edge portion of the tang portion to resist movement of the blade in a first direction.

A folding knife, comprising:

• a handle comprising a side wall having a side surface;
• a protrusion extending laterally from the side surface of the side wall, the protrusion having a side surface and an edge portion extending laterally from the side surface of the side wall to the side surface of the protrusion, the edge portion comprising a first surface portion and a second surface portion, wherein the second surface portion is positioned forward of the first surface portion and extends downwardly at an angle relative to the first surface portion, wherein the second surface portion is configured as a locking surface, and wherein the protrusion comprises a recess extending laterally into the protrusion toward the side surface;
• a blade having a tang portion comprising a locking edge portion, the blade being translatable relative to the handle between a storage position and a use position;
• a linkage assembly pivotably coupling the handle to the blade;
• a locking mechanism disposed within the recess of the protrusion and comprising a locking member and a biasing member, the locking member being rotatable about an axis extending through the locking mechanism between a locked position, an unlocked position, and a detent position;
• and
• wherein when the blade is in the use position, the locking surface engages the locking edge portion of the tang to resist movement of the blade in a first direction.