A folding knife including a handle, a pivot axis, and a blade having a cutting edge. The blade is pivotably coupled to the handle such that the blade is pivotable relative to the handle about the pivot axis between a retracted position and an extended position. The cutting edge is exposed in the extended position and a portion of the blade is received within the handle in the retracted position. The folding knife further includes a bearing assembly for facilitating movement of the blade between the retracted position and the extended position. The bearing assembly includes a first bearing recessed within the blade and a second bearing recessed within the handle.

A tool having a replaceable component is disclose. In one aspect, the tool has a handle and an armature rotatably coupled to a first end of the handle. The armature is configured to be disposed at least partially within a cavity of the handle in a first position and extended outside of the handle in a second position. In another aspect, the tool is removably coupled to a distal end of the handle extending generally in the same longitudinal direction as the handle. A tool is removably coupled to the handle in an improved manner that optimizes safety and efficiency.

A folding knife includes a handle and a blade rotatably connected to the handle, the blade rotatable between a closed position and an opened position about a blade axis. A finger tab is useable to rotate the blade from the closed position to the opened position, the finger tab rotatably connected to the blade and rotatable between a retracted position and an extended position about a tab axis parallel to the blade axis. A torsion spring biases the finger tab toward the retracted position.

A folding knife includes a handle and a blade, rotatably connected to the handle with an axial shaft. The handle has two or more parts, together the parts of the handle form a cavity in which the blade is placed in the closed position. The blade has a working sharpened edge and a shank, and rotates about the axial shaft from the closed position, in which the working sharpened edge of the blade is positioned within the cavity, to the open position, in which the working sharpened edge of the blade protrudes from the handle and allows the cutter to be used. One of the parts of the handle includes an additional recess containing a zigzag spring and a hook. One end of the spring is connected to the handle, and its other end is connected to the hook. The hook is pivotally connected to the blade of the knife and transmits to it the force of the stretched spring, which allows the knife to open under the force of compression of the spring. The shape of the hook is such that it partially encircles the axis of the knife, and the place where the hook is connected to the blade is such that the folded knife does not open under the influence of the spring until the user withdraws the blade from the folded position to a certain angle, thereby initiating further opening of the knife under the influence of the spring.

A folding knife includes a handle, a blade, and an engagement member. The handle has first and second laterally-spaced side portions. The first side portion of the handle includes an engagement opening with first and second portions that are interconnected with each other. The first portion has a larger width than a width of the second portion. The blade is disposed laterally between the first and second side portions of the handle and is pivotable relative to the handle between a closed position and an open position. The engagement member extends laterally from the second side portion through the engagement opening of the first side portion. The engagement member has a head portion with a first diameter and a neck portion with a second diameter smaller than the first diameter. The engagement member is moveable relative to the engagement opening between an unsecured position and a secured position.

A folding knife configured for precise and rapid disassembly and reassembly includes two pivotally connecting and engaging shafts fixedly provided on a first- and a second-side handle portion respectively. The shafts are pivotally connectable and mutually engageable so that the handle portions and a blade can be rapidly and precisely put together, allowing the blade to rotate with respect to the handle portions about an axis defined by the shafts either into or out of the space between the handle portions. The folding knife further includes two locking members provided on the handle portions respectively. The locking members can be locked together to connect the blade to the handle portions securely. By pushing one of the locking members, the locking members can be unlocked from each other to enable disengagement between the shafts and hence rapid and complete separation between the blade and the handle portions.

A tool having a first portion defining a housing for receiving a second portion mobile in rotation between a first inactive position and a second active position, said tool equipped with at least one locking device in at least one position of said second portion, said device having a portion pivoting about a shaft perpendicular to its largest dimension between at least one position where one end of the second portion is engaged in a notch formed in the end of the first portion, and another position where it is disengaged from said notch, said part being configured for a return to the inactive position by at least one return member, at least the elongated part, its pivot shaft and the at least one return member being cutout in the first portion.

A VATO comprises a blade, a handle, a stabilizing assembly, and a spherical weight. In a preferred embodiment, the spherical weight makes up a significant portion of the overall weight of the VATO. The spherical weight is positioned between the blade and the handle, and the stabilizing assembly is attached to a rear portion of the handle. When the VATO is thrown, a velocity vector is established in the direction of the trajectory of the VATO. The stabilizing assembly produces aerodynamic drag which assists in keeping the blade oriented in a forward position with respect to the trajectory of the VATO. The spherical weight is permitted to freely rotate thereby enabling the blade, the handle and the stabilizing assembly to independently rotate into alignment with the trajectory of the VATO such that the blade is in a forward position as the VATO strikes a target.

A folding knife is provided with a deflectable pivot that provides a varying bias force as the blade is rotated between the closed and open positions. Specifically, the pivot secures the blade to bias members of a handle, and the bias members deform relative to other parts of the handle to allow the pivot to move and to provide the varying bias force. A cam surface on the tang of the blade operatively engages a pin of the handle to control the deflection of the pivot and the bias members. The cam surface and the resulting bias force are arranged to locate and keep the blade in the open or closed positions like a detent mechanism to reduce the likelihood of an unintentional opening or closing of the blade and to improve the safety of the folding knife.

A folding knife configured for rapid assembly and disassembly includes a blade and first and second handle portions. The first handle portion includes two engaging posts on the inner side, and the second handle portion has two engaging holes in the inner side. The engaging posts can extend respectively into the engaging holes so that the two handle portions form a complete handle. An engaging plate is provided in the handle and connected to a switch in the second handle portion. When the switch is pushed in one direction, the engaging plate engages with the engaging posts to prevent the engaging posts from disengaging from the engaging holes. Once the switch is pushed in the opposite direction, the engaging plate disengages from the engaging posts to allow the engaging posts to disengage from the engaging holes. The switch thus enables rapid assembly and disassembly of the folding knife.