A folding knife includes a handle and a blade. The handle includes a first side portion and a second side portion. The blade is pivotably coupled to the handle and pivotable relative to the handle about a pivot axis between a closed position and an open position. The first side portion of the handle comprises a first portion and a second portion, the second portion slidable relative to the first portion in a longitudinal direction that is perpendicular to the pivot axis and parallel to a longitudinal axis of the first portion, between a first position and a second position. When the second portion is in the first position, the first portion is prevented from rotating relative to the second portion and the second side portion, and when the second portion is in the second position, the first portion is rotatable relative to the second portion and the second side portion.

A folding knife includes a blade mounted for pivotal movement between an open position and a closed position. The knife includes a locking assembly having a cam mounted for pivotal movement between a raised position, in which the locking assembly is in an unlocked configuration allowing pivotal movement of the blade, and a lowered position, in which the locking assembly is in a locked configuration preventing pivotal movement of the blade. The knife includes a projection on the blade moveable between a collapsed position, allowing pivotal movement of the blade, and a raised position, preventing pivotal movement of the blade. The knife includes a bolt locking assembly for locking and unlocking the blade, and a cap over the bolt locking assembly preventing the bolt locking assembly from unlocking the blade.

A folding knife includes a blade mounted for pivotal movement between an open position and a closed position. The knife includes a locking assembly having a cam mounted for pivotal movement between a raised position, in which the locking assembly is in an unlocked configuration allowing pivotal movement of the blade, and a lowered position, in which the locking assembly is in a locked configuration preventing pivotal movement of the blade. The knife includes a projection on the blade moveable between a collapsed position, allowing pivotal movement of the blade, and a raised position, preventing pivotal movement of the blade. The knife includes a bolt locking assembly for locking and unlocking the blade, and a cap over the bolt locking assembly preventing the bolt locking assembly from unlocking the blade.

A knife includes interchangeable blades that are secured within the handle using a locking mechanism having a lock pin disposed between the distal end of the lock bar and the blade. In addition to strengthening the lock, the lock pin also serves as a safety catch n the unlikely event of lock failure, resisting rotation of the blade into a position in which the user's fingers would be cut.

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 has a blade pivotably mounted between a first handle scale and a second handle scale and attached to a first pivot post and a second pivot post. A locking mechanism is slidably mounted in the first handle scale and is spring biased into contact with the first pivot post. The locking mechanism is spring biased into contact with a first groove on the first pivot post when the blade is in a closed position thereby preventing the blade from pivoting to the open position, and the locking mechanism is spring biased into contact with a second groove on the first pivot post when the blade is in an open position thereby preventing the blade from pivoting to the closed position.

A Balisong knife includes a latch that resists compression of the back end of the handles towards each other under grip pressure by the user, thus increasing the columns strength of the handles when the knife is in a latched open configuration. A crossmember is provided adjacent to the latch pivot, resisting movement of the latch into any position wherein interference between the latch and tip of the blade could occur. Integral, friction reducing surfaces are provided on components of the knife. The knife can be assembled using snap fit pivot pins. The blade includes portions of varying thickness, providing additional thickness in the region of the points for greater strength, while allowing center edges for more effective cutting.

A Balisong knife includes a latch that resists compression of the back end of the handles towards each other under grip pressure by the user, thus increasing the columns strength of the handles when the knife is in a latched open configuration. A crossmember is provided adjacent to the latch pivot, resisting movement of the latch into any position wherein interference between the latch and tip of the blade could occur. Integral, friction reducing surfaces are provided on components of the knife. The knife can be assembled using snap fit pivot pins. The blade includes portions of varying thickness, providing additional thickness in the region of the points for greater strength, while allowing center edges for more effective cutting.

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.