In one representative embodiment, a folding knife comprises a blade having a tang portion, a first linking element, a second linking element, and a handle. The blade can be translatable between a storage position and a use position. The first linking element can be pivotably coupled to the tang portion at a first pivot axis and the second linking element can be pivotably coupled to the tang portion at a second pivot axis. The handle can be pivotably coupled to the first and second linking elements at third and fourth pivot axes, respectively. The handle can have a first locking surface configured to resist movement of the blade in a first direction and a second locking surface configured to resist movement of the blade in an opposing second direction.

A blade mounting bracket includes a blade mounting part and a handle connecting part. A blade mounted on the blade mounting bracket defines a strip-shaped hole. The strip-shaped hole includes a mounting section and a tightening section. A width of the mounting section is greater than a width of the tightening section. The blade mounting part includes a base and a fixing piece connected with the base. An upper surface of the fixing piece is matched with the mounting section. An upper portion of the fixing piece extends downwards to connect with the base. Grooves are formed between the upper surface of the fixing piece and the base. The fixing piece includes a fixing block matched with the mounting section. The grooves and the fixing block fix the blade in a plane in which the blade is located.

A folding knife with a locking mechanism is provided. The folding knife includes a locking spring that interfaces with a recess in the blade to bias the blade from being pivoted out of the handle. A button interfaces with the locking spring to actuate the locking spring interfacing with the blade.

An ergonomically designed, auto-retracting utility knife that can safely remain in the user's hand while performing non cutting tasks. This invention allows a person to continue with the jobs they were performing by having the ability to use both hands and not having to set the utility knife down between manual tasks, thus saving time and increasing efficiency. An auto-retracting blade decreases the risk lacerations and other hand/wrist injuries to the user and others during routine use of the knife.

A folding knife including a blade assembly; a first plate; a first member; a spacer connected to a first end of the first member; and a first button connected to the first member between the first end of the first member and an opposing second end of the first member; wherein the spacer is configured to be inserted into a slot of the blade assembly to lock the blade assembly into an open orientation with respect to the first plate. The first member is configured to be rotated with respect to the first plate by the first button to allow the blade assembly to be unlocked. The first plate has an arcuate slot; wherein the arcuate slot is located closer to a first end of the first plate than to a second end; and wherein the first button is located between the arcuate slot and the second end.

Various embodiments of a folding knife are disclosed. In one embodiment, the folding knife includes a handle, a blade including a tip and a tang with the tang having a tang block engagement element, an axle pivotably connecting the blade to the handle, and a lock mechanism. The lock mechanism includes a locking block constrained to move along a fore-aft linear axis, the locking block including a lower engagement surface, an upper engagement surface, and a rear surface. The lock mechanism also includes a biasing device carrier pivotably connected to the handle, a biasing device oriented between the biasing device carrier and the rear surface of the locking block and the biasing device configured to bias the locking block toward the blade tip when the blade is in an open orientation, and at least one handle block engagement element oriented above the upper engagement surface of the locking block.

Various embodiments of a folding knife are disclosed. In one embodiment, the folding knife includes a handle, a blade including a tip and a tang with the tang having a tang block engagement element, an axle pivotably connecting the blade to the handle, and a lock mechanism. The lock mechanism includes a locking block constrained to move along a fore-aft linear axis, the locking block including a lower engagement surface, an upper engagement surface, and a rear surface. The lock mechanism also includes a biasing device carrier pivotably connected to the handle, a biasing device oriented between the biasing device carrier and the rear surface of the locking block and the biasing device configured to bias the locking block toward the blade tip when the blade is in an open orientation, and at least one handle block engagement element oriented above the upper engagement surface of the locking block.

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

A multifunctional rescue tool providing a plurality of tool components including an angled blade to disengage a lock shielded by a blocker plate and wherein the angled blade has a base portion and an integral elongate distal portion forming an angle along a contiguous planar surface that is preferably substantially perpendicular and is pivotally coupled to a handle having a corresponding slot configured for receiving the angled blade wherein the elongate distal portion is angled outwardly from the base portion of the angled blade in a preferably perpendicular orientation when the base portion and handle are locked in substantial alignment in an open position, and the angled blade is alternatively engageable to form additional angles to facilitate construction of raker shores while also including various tool components including a window breaker, seat belt cutter, gas shut off, oxygen tank, hexagonal wrenches, as well as, a lanyard, shove knife, and cutting knife in a compact configuration capable of convenient and ready carrying and stowing in a pocket or wearable gear of a firefighter or other first responder.

Switchblades are disclosed herein. A switchblade includes a handle body, a blade pivotally coupled to the handle body, and a release mechanism for pivoting the blade about a blade pivot axis to transition the blade from a folded position to a deployed position. The release mechanism includes a release spring, a sear, and an actuator. The release spring is configured to transition from a retained configuration to a released configuration to drive the blade from the folded position to the deployed position. The sear is configured to retain the release spring in the retained configuration while the sear is in a retaining position. The actuator includes an actuator arm that is configured to move relative to a portion of the handle body to transition the sear from the retaining position to a releasing position.