Folding knife with mechanism to reposition back bar
View Patent ↗A folding knife having a back bar configured to engage the tang portion of a blade. A release member mechanism is utilized to engage the back bar to apply force thereto to at least partially disengage the back bar from the tang portion of the blade for purposes of repositioning the blade with respect to the handle.
1. A locking system for a folding knife comprising:
a) a handle having a forward region and a rearward region,
b) a blade pivotally attached to the handle at the forward region, the blade having a tang region with a tang surface, the tang surface comprising a tang indentation on the sharpened edge side of the blade,
c) a lock back bar pivotally attached to the handle, the lock back bar having a tang engagement portion configured to engage the tang surface of the blade,
d) a biasing member configured to bias the lock back bar so the tang engagement portion forcefully engages the tang surface,
e) a release member operatively configured to reposition the lock back bar to lower the closing rotational resistance upon the blade,
f) whereas the lock back bar is configured to be orientated to reposition in a direction away from the tang surface by repositioning the release member where the release member repositions the blade engaging member to lower the rotational resistance upon the blade and the lock back bar can independently reposition in a direction away from the tang surface by applying force directly to the lock back bar; wherein the release member being positioned to be pivotally attached to the handle so a cam surface of the release member engages the lock back bar, the release member having a lateral engagement member extending through a surface defining an opening in the handle on the lateral region of the handle.
2. The locking system as recited in claim 1 where the release member has a first position where the cam surface is such that a first contact location between the release member and the lock back bar is at a shorter distance than when the release member is in a second position where a second contact location between the cam surface of the release member and the lock back bar comprises a greater second distance than the first distance.
3. The locking system as recited in claim 1 where the lock back bar has a transverse engagement region which is configured to be pressed to disengage the tang engagement portion from the tang surface.
4. The locking system as recited in claim 1 where the tang surface is comprised of the tang indentation and a lock notch where the tang engagement portion of the lock back bar partially disengages from the tang engagement surface for a first portion of rotation of the blade with respect to the folding knife.
5. The locking system as recited in claim 4 where the tang engagement portion of the lock back bar is configured to engage the lock notch when the blade is in an open position, and when the release member is repositioned to a second position the tang engagement portion of the lock back bar disengages from the lock notch so the blade can reposition from the open position to the closed position.
6. The locking system as recited in claim 1 where the tang engagement portion of the lock back bar is configured to engage a lock notch when the blade is in an open position, and when the release member is repositioned to a second position the tang engagement portion of the lock back bar disengages from the lock notch so the blade can reposition from the open position to the closed position.