Abstract: An infinitely adjustable knife sharpener apparatus is provided. The apparatus comprises a clamping mechanism having a first clamp member and a second clamp member for securing a knife blade therebetween. At least one infinitely adjustable guide rod assembly is also included. For example, an infinitely adjustable guide rod can be employed to determine an angle to which a knife blade is sharpened. Additionally, or alternatively, an infinitely adjustable guide loop can be included to determine an angle to which the knife blade is sharpened. Further, the apparatus is adjustable via a plurality of apertures in at least one of the first and second clamp members. Repositioning the guide rod assembly along a length of the first and/or the second clamp members changes the sharpening angle of the apparatus. A swivel block can also be included to facilitate foldability of the guide rod assembly.

Abstract: The improvement in a blade honing device having jaw members adapted to grip a blade to be honed and having honed guide members is to pivotally secure the hone guide members to one of the jaw members in such manner that the hone guide members may be folded from an operative position to a folded position in which they lie contiguous to and lengthwise along the jaw members.

Abstract: A portable knife sharpener comprising two duplicate bar or narrow plate-like clamp members connected together adjacent to but spaced from their one ends for pivotal movement about axes generally parallel with the planes thereof and having facing planar surfaces with linear edges at their ends closest to their pivotal connection. A thumb screw is threaded in one of the clamp members intermediate its end opposite to said one end and its pivotal connection with the other clamp member the end of which clamp screw abutts the other clamp member. A discrete flange or angle-like member is pivotally connected by one flange part thereof to the side of each of the clamp members not facing the other clamp member with the other flange part of the member extending normal to the planar surface of the clamp member to which it is connected. Each of said angle-like members has a plurality of apertures therein spaced like distances from the planar surface of the clamp member to which it is connected.

Abstract: A portable work holder for positioning and maintaining an article being sharpened, such as a knife, or the like, in predetermined position relative to a planar surface of a stationary abrasive member or stone during manual manipulation of the article relative to the abrasive member for the purpose of sharpening the same, having two plate-like relatively long narrow clamp members each with one end having a bevel on only one side and pivotally connected by a countersunk head screw to one another adjacent to their bevelled ends with their bevelled sides facing away from one another, a thumb screw threaded in a tapped aperture in one of the clamp members intermediate the pivotal connection of the members to one another and the ends of the clamp members remote from the previously mentioned bevelled ends with its non-headed end engaging the other clamp member for forcing the bevelled ends of the clamp member towards one another, and movable projections of equal length in the form of eye bolts extending a substantia