Abstract
The invention relates to hand tools of knife sharpening, especially for sharpening of kitchen knifes, namely relates to angle guides for knife sharpening. This angle guide has a removably attachable body that is put on a sharpening rod through a hole going through the body, which has the ability to move back and forth on the rod. The body has guiding cutouts for the blade of a knife that allow to maintain the desired angle against the sharpening rod during the sharpening procedure. At least one pair of cutouts with inclined narrowing cavities are formed in the body on its opposing sides in opposing directions, which allows to alternate between the sides of the blade during the sharpening process and in this way much less burr is produced.
Claims
1. A knife sharpening angle guide comprising: a body of rigid material removably attachable through a central hole of the body on a sharpening rod movable in both directions along a length of the sharpening rod; and inclined guiding cutouts formed in the body for receiving a knife blade to be sharpened and to position the knife blade at a predetermined angle with respect to the sharpening rod during the sharpening process of different sides of the knife blade, each of the guiding cutouts having an inclined narrowing cavity with a pointed end and a wider open end; wherein the guiding cutouts are located at opposite sides of the body at opposite directions so that the pointed ends of the inclined narrowing cavities of the guiding cutouts are directed towards the central hole of the body, allowing the knife blade to have contact with the sharpening rod at the predetermined angle during the sharpening process, and the wider open ends of the inclined narrowing cavities of the guiding cutouts are directed to an outside of the opposite ends of the body.
2. The knife sharpening angle guide according to claim 1, wherein the body has an elongated shape and an oval cross section with two opposite quarters of the oval are removed to ensure better access of the knife blade to the sharpening rod.
3. The knife sharpening angle guide according to claim 1, wherein in the body the guiding cutouts include a first pair of guiding cutouts and a second pair of guiding cutouts each of the guiding cutouts of the first and second pair of guiding cutouts have the inclined narrowing cavity, wherein an angle of the guiding cutouts with respect to the sharpening rod of the first pair of the guiding cutouts is the same, but the angle of the guiding cutouts of the first pair differs from an angle of the second pair of guiding cutouts, wherein guiding cutouts of the first pair and the second pair are located at the opposite sides and opposite directions so that the pointed ends of the inclined narrowing cavities of the guiding cutouts of the first pair and the second pair are directed towards the central hole of the body, allowing the knife blade to have contact with the sharpening rod at the predetermined angle during the sharpening process, and the wider open ends of the inclined narrowing cavities of the guiding cutouts of the first pair and the second pair are directed to the outside of the opposite ends of the body.
4. The knife sharpening angle guide according to claim 1, further comprising a nozzle for placement on a tip of the sharpening rod during the sharpening process.
5. The knife sharpening angle guide according to claim 1, wherein a length of the inclined narrowing cavity of each guiding cutout is configured for the knife blade to be held at the predetermined angle during the sharpening process.
Description
(1) The invention is described in much greater detail by the drawings, which do not limit the scope of the invention and contain:
(2) FIG. 1 is a side view of a proposed angle guide;
(3) FIG. 2 is a back view of the proposed angle guide;
(4) FIG. 3 is a view of the proposed angle guide when it positioned on a sharpening rod with a knife placed in one of the guiding cutouts;
(5) FIG. 4 is an axonometric view of the proposed angle guide;
(6) FIG. 5 is a side view of an another embodiment of the proposed angle guide with two pairs of cut-outs;
(7) FIG. 6 is a back view of the angle guide according FIG. 5;
(8) FIG. 7 is a view of the proposed angle guide according FIG. 5 when it positioned on a sharpening rod with a knife placed in one of the guiding cutouts;
(9) FIG. 8 is an axonometric view of the design of the angle guide according FIG. 5;
DESCRIPTION OF CARRYING OUT OF THE INVENTION
(10) The proposed sharpening angle guide (FIG. 1-FIG. 4) has a body 1 made from a rigid material, for example plastic, wood, polythene etc. The body 1 has an elongated shape and its cross section is similar to oval shape, wherein two opposite quarters of the oval are removed to ensure better access of the blade to the sharpening rod. The body 1 has a central hole 2 through which the angle guide is removeably positioned onto the sharpening rod with the possibility to move it in both directions along the length of the sharpening rod. A pair of sharpening cutouts 3, 3′ is formed in the body 1, wherein each cutout 3, 3′ of the pair has an inclined narrowing cavity, which shape and length ensure a stable hold of the blade at the desired angle against the sharpening rod during sharpening process. The length of the inclined narrowing cavity of the each guiding cutout is at least ⅔ of a height of the knife blade to be sharpened to ensure a stable hold of the blade at the predetermined angle during the sharpening process. Mentioned guiding cutouts are located at the opposite sides of the body 1 in a opposite directions. The pointed ends of the inclined narrowing cavities of the guiding cutouts 3, 3′ of the pair are directed towards the central hole 2 of the body 1, allowing the blade of the knife to have contact with the sharpening rod at the predetermined angle during the sharpening process, and wider ends of the inclined narrowing cavities of the guiding cutouts 3, 3′ of the pair are directed outside to the opposite ends of the body 1.
(11) The cross section of the body 1 together with the shape and length of the guiding cut-outs ensure a comfortable access of the blade to the sharpening surface of the rod and a stable hold. The nozzle 4 is put on the tip of the sharpening rod during the sharpening process to stop the angle guide at the end of the motion.
(12) A proposed sharpening angle guide (FIG. 5-FIG. 8) has a body 1′ of elongated shape, which is made from a rigid material. In a center of the body 1′ is made a hole 2′ through which it is removable positioned onto the sharpening rod with the possibility to move it in both directions along the length of the sharpening rod. The body 1′ has two pairs of guiding cutouts (3″, 3″) and (3′″, 3′″), wherein each cutout 3″ and 3′″ of the each pair has an inclined narrowing cavity. The guiding cutouts 3″, 3″ of first pair have a same sharpening angle that differs from the sharpening angle of the guiding cutouts 3′″, 3′″ of the second pair. Using the first pair of guiding cutouts 3″, 3″ the cumulative cutting edge sharpening angle could be 30 degrees, which would mean that each side of the cutting edge is sharpened against the sharpening rod at a 15 degree angle and using the second pair of guiding cutouts 3′″, 3′″ the cumulative cutting edge sharpening angle could be 40 degrees, which would mean that each one of the openings would sharpen the cutting edge at a 20 degrees angle against the sharpening rod. The guiding cutouts 3″, 3″ of the first pair and the guiding cutouts 3′″, 3″ of the second pair are located at the opposite sides and opposite ends of the body 1′ at the opposite directions respectively so that the pointed ends of the inclined narrowing cavities of the guiding cutouts of each pair are directed towards the central hole 2 of the body 1, allowing the blade of the knife to have contact with the sharpening rod at the predetermined angle during the sharpening process, and wider ends of the narrowing cavities of the guiding cutouts 3″, 3″ and 3′″ of each pair are directed outside to the opposite ends of the body 1. The length and shape of the body 1′ and the length and shape of the guiding cutouts formed in the body 1′ are chosen to ensure stability of the hold of the blade being sharpened at the desired angle during the sharpening process. The nozzle 4′ is put on the tip of the sharpening rod to stop the angle guide at the end of the motion.
(13) Use of the Angle Guide
(14) The body 1 (FIG. 3) is put on the sharpening rod through the hole 2. The nozzle 4 is fastened at the tip of the sharpening rod. Then the blade of the knife is placed into one of the guiding cutouts 3, 3′ (FIG. 1, FIG. 3). When the blade of the knife is placed into the guiding cutout 3 it then has contact with the surface of the sharpening rod at the angle defined by the cutout. While holding the sharpening rod in a horizontal position, the blade of the knife that is in one of the cutouts is pressed against the sharpening rod, starting at the bottom part of the cutting edge and ending at its tip while at the same time the guide moves along the sharpening rod until it is pressed against the nozzle 4′. After the latter motion is completed, the sharpening rod is turned together with the angle guide around its axis by 180 degrees and the blade of the knife is placed into the opposing guiding cutout 3′, after which the blade is pressed against the sharpening rod and then with a motion backwards starting at the bottom of the cutting edge and ending with its tip it is sharpened by bringing the angle guide back along the sharpening rod until its handle is reached. The sharpening is processed by alternating from one side to another side of the blade as described above and these motions are repeated until the desired sharpness is achieved.
(15) Using the another embodiment of invention (FIG. 5-FIG. 8) with two pairs of guiding cutouts 3″, 3″ and 3′″, 3′″ the sharpening is carried out in an analogous manner as described above. In this case one pick the sharpening angle as one can choose between the guiding cutouts 3″, 3″ or 3′″, 3′″, which have different angles against the sharpening rod.
