Technologies and implementations for a cutting apparatus configured to have cutting depths be controllable are generally disclosed.

An automatic opening tool with sliding scale release, including a modular body; a tool; a gear assembly attachable to the tool; a first resilient member for rotating the tool; a sear configured to mate with the gear assembly; a second resilient member for imparting a resilient force to the sear; and cover plates.

A self-defense pocket knife with handle of suitable proportion to be grasped in closed fist and a conveyance system configured for the emergency manual conveyance of a blade from a position for storage to a position for use without requiring the user to appreciably alter or compromise grip upon the handle during the course of such conveyance.

The present invention is to provide a folding knife with a locking function comprising a handle, a blade pivotally connected to an end of handle through a pivot pin, a poke member and a first elastic component; wherein blade includes a locking pin protruded adjacent to pivot pin; e poke member includes a poke part at an end thereof and exposed out of handle. The other end of poke member is pivotally connected between pivot pin and the other end of handle. Poke member includes a locking slot recessed adjacent to a middle section thereof and facing pivot pin. first elastic component includes an end abutted against the middle section, and the other end fixed between poke member and the other end of handle, for applying an elastic force on poke member, so as to ensure locking pin to be engaged into locking slot, when blade is received inside handle.

A folding knife having an improved locking engagement mechanism that will maintain and hold the knife in an open locked use position or in a locked folded position. The improved locking engagement provides a spring urged dual locking bar engaged directly on the knife blade for an improved imparted force transfer. A positional locking activation safety button is resiliently registerably against an apertured pivot arm extension of the locking bar for locking and unlocking engagement.

A tool includes a housing, a blade receptacle within the housing configured to receive a removable saw blade having a lock engaging region, and a blade release actuator adjacent to the blade receptacle, the blade release actuator being rotatable about an axis associated therewith and configured to selectively move a lock member into the lock engaging region. The blade release actuator comprises a ramp on which the lock member rests. Rotation of the blade release actuator rotates the ramp under the lock member from a blade locked position where the lock member is pushed by the ramp into the lock engaging region of the removable saw blade to a blade release position where the ramp is rotated to create a gap between the lock engaging region and the blade release actuator such that the saw blade is removable from the tool.

Folding knife embodiments are disclosed herein comprising a blade operable to pivot relative to a handle, between an open position and a closed position, about a pivot axis extending through a tang portion of the blade having at least one locking recess. The knife can have a locking mechanism comprising a rod that extends along the pivot axis through the tang portion and a locking member coupled to the rod which engages the at least one locking recess of the tang portion when the blade is in at least one of the open position or the closed position. The knife can further comprise a push button coupled to the rod, wherein depression of the push button is configured to eject the locking member from the locking recess in the blade, thereby unlocking the blade.

A securing structure of a folding knife includes a blade and a handle. The blade is pivotally connected to the handle and has a pivotal connection end provided with a first engaging groove and a second engaging groove. The handle has two opposite sides each provided with a first guide hole. A stop block is provided in the handle and has a stop surface for abutting against an abutting surface of the blade. The stop block also has an inclined guide surface. The inclined guide surface is adjacent to the first guide holes and is inclined in a direction from the upper handle edges toward the front handle ends. A pin extends through the two first guide holes and can be engaged in either one of the first and the second engaging grooves and thereby clamped between a wall portion of the engaging groove and the inclined guide surface.

A folding knife can include a handle comprising a side wall having a side surface, a protrusion extending laterally from the side surface of the side wall, a blade, and a linkage assembly pivotably coupling the handle to the blade. The protrusion can have an edge extending laterally from the side surface of the side wall to the side surface of the protrusion. The edge can include a first surface portion and a second surface portion configured as a locking surface. The second surface portion can extend downwardly at an angle relative to the first surface portion. The blade can have a tang including a locking edge, and can be translatable relative to the handle between a storage position and a use position. When the blade is in the use position, the locking surface engages the locking edge to resist movement of the blade in a first direction.

A tool structure that facilitates adjusting the tension of the blade, comprising a shank, a blade, a sleeve, a lock lever, a cover plate, and an adjusting screw; The shank comprises a left handle and a right handle, and is formed with a storage slot; The sleeve has a guide hole and a guide slot; The lock lever has a button lever and a guide lever, and the guide lever is equipped with a first lock catch and a second lock catch; The lock lever is installed in the guide hole; The shank has a lock hole; The cover plate is located on the right side of the right handle and is connected to the right end of the sleeve by means of adjusting screws. The cover plate is equipped with a compression portion.