A folding knife having an elongated handle defining a finger hole proximate one end of the handle and a blade having a cutting edge and pivotally connected to the handle and configured to move with respect to the handle between a retracted position and an extended position. The blade is configured such that a portion of the cutting edge extends into the finger hole upon the blade being in the retracted position. A blade cover is connected to the handle and is configured to move between an operable position and a withdrawn position. A spring is configured to contact and automatically move the blade cover from the operable position towards the withdrawn position, whereby, as the blade reaches the retracted position, the blade cover is automatically moved to the operable position and covers the portion of the cutting edge of the blade extending into the finger hole, and upon the blade moving towards the extended position, the spring automatically moves the blade cover from the operable position towards the withdrawn position.

A folding knife comprises a blade 1 which has a pin 9 and is pivotally fastened to a locking plate 2 having an aperture for a pivot bushing. In a first variant, the folding knife comprises a pivot bushing 3 with a flange 4. In a second variant, the knife has a pivot bushing 17 with a flange 18, and, on the opposite side of the blade 1, there is a clamping bushing 19 with a flange 20, which interacts with the pivot bushing 17 by means of a tight fit. A tightening screw 7 is screwed into the pivot bushing 3 or 17. Mounted on both sides of the blade 1, on the pivot bushing 3 or 17, are washers 5 and 6 made of an anti-friction elastically deformable material having a compressive elastic modulus of not less than 800 MPa. The locking plate 2 and a cover plate 8 are fastened by the insertion of fastening screws 12 into corresponding apertures 13. A backspacer 11 is mounted in the gap between the plates 2 and 8. A liner 10 is mounted in the lower portion of the locking plate 2. The technical result is simpler assembly, an increased lifespan as a result of more efficient compensation of lateral and torsional forces on the blade, and repairability.

A folding knife having an elongated handle defining a finger hole proximate one end of the handle and a blade having a cutting edge and pivotally connected to the handle and configured to move with respect to the handle between a retracted position and an extended position. The blade is configured such that a portion of the cutting edge extends into the finger hole upon the blade being in the retracted position. A blade cover is connected to the handle and is configured to move between an operable position and a withdrawn position. A spring is configured to contact and automatically move the blade cover from the operable position towards the withdrawn position, whereby, as the blade reaches the retracted position, the blade cover is automatically moved to the operable position and covers the portion of the cutting edge of the blade extending into the finger hole, and upon the blade moving towards the extended position, the spring automatically moves the blade cover from the operable position towards the withdrawn position.

A power-assisted folding knife, including: a blade holder; a blade arranged in the blade holder; a handle rotatably connected to the blade holder; a locking mechanism for locking the blade holder in an unfolded position and/or a folded position; the power-assisted folding knife further includes a power-assisting mechanism connected to the blade holder and the handle, for providing assisting power when unfolding a power-assisted folding knife. The power-assisted folding knife uses an assisting mechanism for providing assisting power when unfolding a folding knife, so as to facilitate easier unfolding of the folding knife and to allow single hand operation; the blade holder can be locked in an unfolded position and/or a folded position to ensure safe use of the power-assisted folding knife.

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.

This disclosure describes systems, methods, and apparatus for a locking folding knife having a handle lock and a safety switch arranged around and rotatable around a pivot axis of the knife. In an engaged position the switch overlaps at least a portion of the handle lock and prevents it from moving into an unlocked position. A spring, such as a wire form spring, can be arranged within a pocket of the switch, and when the switch is moved between engaged and disengaged positions the spring can be compressed generating a rotational bias on the switch urging the switch toward either the engaged or disengaged position.

It is an object of the present invention to provide a folding knife with which, in its open state in which the blade is fully opened from the handle, a protrusion on the blade side can be prevented from hitting the thumb of a user who tries to push the knife down from above with respect to the object to be cut. This is a folding knife comprising a movable piece that is attached to the blade and the handle so as to be relatively rotatable by a specific rotation angle with respect to the blade, and to rotate with respect to the handle together with the blade outside the specific rotation angle; a notch or a recess formed at a position near a rotating shaft portion on the back side of the blade; a protrusion that is formed at a position on the movable piece and in a shape corresponding to the notch or recess of the blade; and a rotation mechanism that allows the movable piece to rotate with respect to the blade only within a specific rotation angle.

A folding knife includes a handle, a blade, a pivot element, and a locking mechanism. The handle includes a first side portion and a second side portion disposed on either side of the blade. The pivot element extends from the first side portion and through the opening of the blade such that the blade can pivot about the cylindrical portion from a storage position to a use position. The locking member is movable between a locked position and an unlocked position. In the locked position, relative rotational movement between the first and second side portions of the handle is restricted. In the unlocked position, the first and second side portions of the handle can rotate relative to each other, and the first and second side portions of the handle can be separated when a non-circular opening of the handle aligns with a non-circular portion of the pivot element.

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.