Abstract: A folding knife has mechanisms for facilitating dual operational modes for opening the blade. In a first modality, the knife is opened and closed manually. In a second modality, the knife is fully automatic. When the blade is in the closed position the user may use either mode, manual or automatic, without any switching mechanism. A lock securely locks the blade in the open position when either opening modality is being used. To open the blade manually, the user rotates the blade from the closed to the open position—the lock automatically locks the blade open when the blade is fully open. To open the blade automatically, the lock mechanism functions as the trigger mechanism; the user slides the lock mechanism to actuate the automatic open mechanism. When the blade is in the fully open position the lock secures the blade open. A torsion spring around the pivot shaft that connects the blade to the handle and which is retained in a bushing drives the blade open in the automatic mode.
Abstract: A folding knife has ambidextrously accessible trigger mechanism for releasing the blade from its open and locked position so that it may be moved to the closed position, and when the knife is fitted with an automatic opening mechanism, for releasing the blade from its closed and locked position to the open and locked position. When the blade reaches the open position a novel locking mechanism securely locks the blade open. The trigger mechanism comprises a button on each side of the knife handle. The user may fire the automatic opening mechanism by depressing either the right or left hand trigger button, or both simultaneously. The release mechanism may be incorporated in an auto-assist or manual knife. The locking mechanisms described herein may be incorporated into a manual opening knife or a knife with an auto-assist opening mechanism and in all cases, the knife incorporates a locking mechanism that locks the blade open in a highly secure manner.
Abstract: A folding tool such as a knife includes first and second spaced apart sidewalls with a blade pivotally attached to both sidewalls with a self-interlocking pivot pin. An opening in one sidewall includes a first, larger portion that receives an end of the pivot pin, and a smaller cylindrical opening that communicates with the larger portion through a slot. The end of the pivot pin slides through the slot and the sidewalls are rotated relative to one another to interlock the sidewalls. The knife may be easily assembled and disassembled without tools.
Abstract: A folding knife incorporates an opening assist mechanism that functions to drive the blade from the closed to the open position and to retain the blade in the closed position. In one embodiment a spring arm located to one lateral side of the blade interacts at its forward end with a drive pin on a tang portion of the blade during a part of the blade's rotational path.
Abstract: A folding tool has a monolithic, one-piece handle with an implement rotationally mounted to the handle for rotational movement between a closed, stored position and an open, use position. The handle is adapted for installation of bearings on both sides of the implement following a defined method of installation so that the implement rides on bearings as it is rotated relative to the handle.
Abstract: A folding knife has dual operational modes. In a first modality, the knife is opened and closed manually. In a second modality, the knife is fully automatic. The user is able to use the knife in either mode, manual or automatic when the blade is in the closed position. In the automatic mode a bolster defines a trigger that causes the blade to move automatically from the closed to the open position. In the manual mode the user manipulates the blade manually to move it from the closed to the open position. A dry fire safety prevents firing of the knife with the trigger when the blade has been opened manually.
Abstract: A folding knife has dual operational mode. In a first modality, the knife is opened and closed manually. In a second modality, the knife is fully automatic. The user is able to switch between modalities with manipulation of a slider bar in the space between handle halves. The user is able to switch from the automatic mode into the manual mode, and vice versa, only when the blade is in the open position. A torsion spring around the pivot shaft connects the blade to the handle. The spring drives the blade open in the automatic operational mode and a switch mechanism is used to alternately engage and disengaged the spring from the blade. One end of the spring is fixed to the handle and the other end interacts with a groove in the tang of the blade when the switch mechanism is in the automatic position. A spacer bar that is part of the switch mechanism has a surface that is operable to laterally displace the spring relative to the blade groove when the switch is in the manual position.
Abstract: A liner lock folding knife with an improved liner lock mechanism which can be manufactured satisfactorily by mass production techniques and conventional machine tools. A locking face surface engaged by a contact end of a locking finger is a concave partial cylinder whose central axis of curvature is located in a position offset with respect to the blade, in the direction toward the side of the handle from which the locking finger extends. The concave surface of the locking face has a radius of curvature smaller than the radius of curvature of the path of the contact end of the locking finger.