A knife sharpener for the manual sharpening of knives that includes a knife clamp, a honing bar extending in a first direction, an upright support, a base, and a sleeve that is configured to receive a knife having a blade. The knife clamp is configured such that the sleeve is selectively mated within the knife clamp to fixedly secure the knife blade therein along a second direction when the knife clamp is closed.

A knife sharpener for the manual sharpening of knives that includes a knife clamp, a honing bar extending in a first direction, an upright support, a base, and a sleeve that is configured to receive a knife having a blade. The knife clamp is configured such that the sleeve is selectively mated within the knife clamp to fixedly secure the knife blade therein along a second direction when the knife clamp is closed.

A method of manufacturing a knife blade includes preparing a blade preform of a first material, depositing a second material which is harder than the first material on an edge of the blade preform by arc welding, and sharpening the deposited second material to prepare a knife blade with a sharp edge. A knife blade is also provided and includes a blade section of a first material, and an edge of the blade section is provided with an arc welded layer of a second material which is shaped as a sharp edge, where the second material is harder than the first material.

A sharpening apparatus is provided. The sharpening apparatus includes a foldable case, a first sharpening tool, and a second sharpening tool. The first and second sharpening tools are associated with the foldable case and are rotatable between a storage position and a sharpening position.

An adjustable sharpener including a body having two sharpening slots, a first arm with a first abrasive element connected to a second arm with a second abrasive element, and a third arm with a third abrasive element connected to a fourth arm with a fourth abrasive element. The first and second abrasive elements are positioned in the first sharpening slot, and the third and fourth abrasive elements are positioned in the second sharpening slot. The adjustable sharpener also includes an adjuster connected to the body and an adjustment assembly connected to the adjuster, the first arm and the third arm. Linear movement of the adjuster causes rotational movement of the first arm and the third arm. In this regard, the adjuster allows the user to manually increase or decrease the sharpening angle between the abrasive elements in the sharpening slots.

An adjustable sharpener including a body having two sharpening slots, a first arm with a first abrasive element connected to a second arm with a second abrasive element, and a third arm with a third abrasive element connected to a fourth arm with a fourth abrasive element. The first and second abrasive elements are positioned in the first sharpening slot, and the third and fourth abrasive elements are positioned in the second sharpening slot. The adjustable sharpener also includes an adjuster connected to the body and an adjustment assembly connected to the adjuster, the first arm and the third arm. Linear movement of the adjuster causes rotational movement of the first arm and the third arm. In this regard, the adjuster allows the user to manually increase or decrease the sharpening angle between the abrasive elements in the sharpening slots.

A knife sheath includes a receptacle and an attachment piece for suspending the knife sheath from a user. The knife sheath is provided with a collar which is detachably attached to the receptacle at an opening. An edge receiving portion of the collar is provided with a sharpener that imparts a sharpening action to a blade of a knife which is introduced into the receptacle. The receptacle and the collar are shaped to allow the collar and receptacle to be attached to each other in a first position and in an alternative second position such that the knife sheath is suitable for both left-handed and right-handed users.

A knife sheath includes a receptacle and an attachment piece for suspending the knife sheath from a user. The knife sheath is provided with a collar which is detachably attached to the receptacle at an opening. An edge receiving portion of the collar is provided with a sharpener that imparts a sharpening action to a blade of a knife which is introduced into the receptacle. The receptacle and the collar are shaped to allow the collar and receptacle to be attached to each other in a first position and in an alternative second position such that the knife sheath is suitable for both left-handed and right-handed users.

Method and apparatus for sharpening a cutting tool. In some embodiments, a sharpener has a guide assembly adjacent a moveable abrasive medium. The medium is advanced at a first speed relative to the guide assembly during a coarse sharpening operation in which a user presents the cutting tool against the medium to shape a side of the cutting tool and generate distended material from the cutting edge (e.g., burrs). The medium is subsequently slowed to a lower, second speed for a fine sharpening operation in which the user presents the cutting tool against the medium to remove the distended material and provide a sharpened cutting edge.

Method and apparatus for sharpening a cutting tool. In some embodiments, a sharpener has a guide assembly adjacent a moveable abrasive medium. The medium is advanced at a first speed relative to the guide assembly during a coarse sharpening operation in which a user presents the cutting tool against the medium to shape a side of the cutting tool and generate distended material from the cutting edge (e.g., burrs). The medium is subsequently slowed to a lower, second speed for a fine sharpening operation in which the user presents the cutting tool against the medium to remove the distended material and provide a sharpened cutting edge.