A knife sharpener for the manual sharpening of knives that includes a knife clamp member having first and second clamping members, a guide member that defines upper and lower guide members, and a base member. Each upper and lower guide member includes a plurality of apertures sized and shaped for receiving a guide rod that includes a sharpening stone. The knife clamp member further includes embodiments assuring the knife blade is held securely and positioned between the first and second clamping members in the same position in which the knife blade was installed the last time it was sharpened.

An apparatus for sharpening a cutting implement includes a base assembly and first and second clamping members pivotably supported by the base assembly. The clamping members each have an inside surface, a proximal end portion, and a distal end portion, where the second inside surface faces and is spaced apart from the first inside surface. The clamping members are adapted to pivot to clamp a cutting implement between the inside surfaces. A clamping assembly attached to the base assembly includes a cam member movably supported by the base assembly, a follower assembly disposed in operational engagement with the cam member and with the proximal end portions of the first and second clamping members. A handle is operatively connected to the cam member, where operating the handle moves the cam member, thereby moving the follower assembly and pivoting the first and second clamping members.

A clamping assembly includes a base defining a spring well. A spring piston assembly is received in the spring well and includes a spring and a piston body. First and second jaws are supported over the base on opposite sides of a central clamp axis that extends vertically through the spring piston and between the jaws, where the jaws are pivotable between an open position and a closed position. A wedge is movable along the central clamp axis between an end of the jaws. A lever has an elongated lever body extending to an end portion defining an L-shape with a toe and a heel, the end portion positioned between the wedge and the spring piston with the toe pivotably connected to the wedge and the heel coupled to the piston body via a linkage. The lever is operable to move the wedge along the central clamp axis.

A device for grinding and/or polishing a cutting edge of a cutting tool. The device includes a handle, at least one roller rotatable relative to the handle, and at least one disc that is rotatable relative to the handle for grinding and/or polishing the cutting edge of the cutting tool. The device can be moved over a substrate by exerting force on the handle so that the roller, which is rotating relative to the handle, rolls on the substrate and the disc can be set in rotation. The disc may be rotatable at a different rotational speed/angular velocity to the roller.

A tool clamping assembly and a sharpener are provided. The tool clamping assembly includes an arm body, its first end is connected with a sharpening frame, the arm body is provided with a top pin and a driving member, the driving member drives the top pin to move along an axial direction of the arm body; a clamping arm component, which includes a first clamping arm and a second clamping arm, the two clamping arms are mirror symmetric and are connected by a rotation axis. The rotation axis is connected to a second end of the arm body, and a torque member is provided on the rotation axis. The torque member is used to apply torque to the two clamping arms to jointly clamp the top pin at first ends of the two clamping arms; when the top pin is moved, the two clamping arms can be rotated synchronously.