Abstract: A folding knife having a movable locking element that locks the blade in open position and retains the blade in secure closed position within an integrated spaced parallel monolithic handle frame member. A spring-urged locking retainment arm engages corresponding parallel portions of the blade shank when in respective locked open and locked closed positions. Sliding longitudinal displacement of the retainment arm allows for progressive engaged rotation of the blade shank about a pivot mounting point to a fully closed and locked position against two blade shank engagement points by the locking arm.

Abstract: An improvement for a dual handle fighting knife having interlocking handles when in open position and multiple spring blades stabilization in open and closed position. The handle blade spring engagement provides for a safe, straight-forward interlocking blade position and spacing of said cutting edge engagement with said handle when in closed position.

Abstract: A folding knife having an improved locking mechanism that keeps the knife in an open extended use position until specific close actions are initiated. The improved locking mechanism provides a safety pin that is secured within the frame elements so as to be positioned between the knife blade and the free end of a locking bar that is spring urged thereagainst imparting improved force transfer locking structure thereto with wear adjustably pivot engagement points of the locking mechanism under spring urged locking engagement.

Abstract: A folding knife having an improved locking mechanism that keeps the knife in an open extended use position until specific close actions are initiated. The improved locking mechanism provides a safety pin that is secured within the frame elements so as to be positioned between the knife blade and the free end of a locking bar that is spring urged thereagainst imparting improved force transfer locking structure thereto with wear adjustably pivot engagement points of the locking mechanism under spring urged locking engagement.

Abstract: A folding knife that provides for a self-opening action as is drawn from the pocket of a user. The knife has a hinged knife blade positioned to be folded into a handle portion for storage when not in use. A blade opening element is mounted on the closed exposed edge of the blade adjacent the handle portion and extends both transversely and longitudinally from the blade so as to be engageable with a portion of the pocket when it is to be retrieved therefrom or by manual manipulation by the user.