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 knife includes a blade defining an aperture, a handle pivotably coupled to the blade and selectively repositionable between a first position and a second position relative to the blade, a catch extending between a first catch end and a second catch end, the catch movably coupled to the handle and including a protrusion proximate the first catch end, and a spring coupled to the handle and configured to apply a biasing force on the catch proximate the second catch end. The biasing force biases the protrusion of the catch toward the blade, and the protrusion is received by the aperture to restrict rotation of the handle relative to the blade when the handle is in the first position.

A folding knife that includes a handle rotatably coupled to a blade through a connecting portion of the latter; the blade being adapted to rotate about a rotation axis with respect to the handle between at least a first position, in which it is extracted from the handle, and a second position, in which it is at least partially housed in the handle. Specifically, the folding knife includes a slider element associated with the blade through a connecting element so as to actuate the rotation of the blade, and the handle includes a guide slit formed facing the connecting portion having a shape of an arc of circumference concentric to the rotation axis, wherein the guide slit is adapted to be slidably engaged by the slider element so as to actuate the rotation of the blade between the first position and the second position.

A utility knife including a handle, a blade, a first blade holder, and a spare blade holder. The spare blade holder is pivotal with respect to the handle between an open position where the recess is exposed to allow a spare blade to be removed from the spare blade holder and a closed position where the recess is within a slot of the handle to inhibit removal of the spare blade from the spare blade holder. The spare blade holder further including a cam surface and the cam surface of the spare blade holder engages a cam surface of the handle when the spare blade holder is in the closed position to urge the spare blade holder in a direction from a first longitudinal side of the handle toward a second longitudinal side of the handle to allow the first blade holder to pivot between extended and folded positions.

A knife includes a blade, a first handle having pivotably coupled to the blade, a second handle pivotably coupled to the blade, the second distal end of the second handle defining a first locking mechanism and a second locking mechanism, a latch pivotably coupled to the second distal end portion and supporting a locking pin, the locking pin configured to selectively engage each of the first locking mechanism and the second locking mechanism separately, wherein the first handle and the second handle are each selectively repositionable between an open position and a closed position, wherein in the open position, the first handle and the second handle extend away from the blade, and wherein in the closed position, the first handle and the second handle extend along the blade.

A knife includes a blade and a handle assembly rotatably coupled to the blade, defining a longitudinal axis, and including a side frame, a handle frame spaced apart from the side frame, a locking arm coupled to the side frame and angularly movable relative to the longitudinal axis between a locked position and an unlocked position, the locking arm defined by an arm width, and a guard coupled to the side frame and overlaying at least a portion of the locking arm, the guard being defined by a guard width measured in a direction perpendicular to the longitudinal axis, the guard width being a distance between a bottom side of the guard and a top side of the locking arm, wherein a ratio of the guard width to the arm width at any given position along a length of the guard is greater than thirty percent.

A knife has two housing parts as well as a blade and a blade support. The support has a blade seat having a contact face normally engaging a blade face with the opposite blade face being freely accessible. The parts are movable between an operating position with the blade projecting and a stowed position with the blade wholly contained. A holder on the blade support secures the blade in the seat via interlocking formations that hold the blade against the contact face but that are so constructed that the blade has a degree of freedom in at least one direction in order to be detached from the blade seat. A latch on the holder has a bolt movable between a bolted position detachably fitted in the seat and holding the blade there and a released position out of the seat and allowing the blade to be replaced.

A knife includes a blade defining an aperture and a handle. The handle includes a body pivotably coupled to the blade, a catch movably coupled to the body, and a biasing member coupled to the body. The catch includes a protrusion. The biasing member is configured to apply a biasing force on the catch. The handle is selectively repositionable between a first position and a second position relative to the blade. The biasing force biases the protrusion of the catch toward the blade when the handle is in the first position. The protrusion is received by the aperture to prevent rotation of the handle relative to the blade when the handle is in the first position.

A knife includes a blade and a handle assembly. The handle assembly is rotatably coupled to the blade, and extends along a longitudinal axis. The handle assembly includes a side frame, a handle frame, a locking arm, and a guard. The handle frame is spaced apart from the side frame and defines a cavity with the side frame. The locking arm is coupled to the side frame and is movable between a locked position and an unlocked position. The locking arm is defined by an arm length. The guard is coupled to the side frame, and is positioned outward from the locking arm relative to the longitudinal axis. The guard overlays at least a portion of the locking arm along the longitudinal axis, and is defined by a guard length. A ratio of the guard length to the arm length is greater than seventy-five percent.

A knife is disclosed having a handle with first and second half handles, a blade containing portion for securing a blade and an opening in a top surface of handle and first and second ends to contain the blade in a folded closed position. The knife includes a hook portion on a posterior end of the blade and a cutting surface portion on an anterior end; a nut and bolt system passing through the blade near the posterior end and both half handles terminating at on outside portion of each half handle enabling the blade to rotate between open and closed positions. A spring bar is integrated in a central portion of the first half handle, attached to the first half handle at a posterior end and including a ball pin on an anterior end of the spring bar, the ball pin enabled to engage the blade in various positions.