US20230405767A1 - Sharpening apparatus - Google Patents
Sharpening apparatus Download PDFInfo
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- US20230405767A1 US20230405767A1 US18/199,544 US202318199544A US2023405767A1 US 20230405767 A1 US20230405767 A1 US 20230405767A1 US 202318199544 A US202318199544 A US 202318199544A US 2023405767 A1 US2023405767 A1 US 2023405767A1
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
- B24D15/06—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges
- B24D15/08—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors
Definitions
- the present disclosure relates generally to a sharpening apparatus. More particularly, the present disclosure relates to a hand-held sharpening apparatus that can be used to sharpen a cutting or spreading implement, such as a kitchen knife or other similar type of implement.
- This sharpening apparatus enables a user to roll the sharpening apparatus to sharpen a cutting implement while the cutting implement is removably engaged to a magnetic knife holder.
- a cutting implement like a kitchen knife can become dull or not sharp over a period of use.
- a whetstone, sharpening stick, Bavarian sharpener, electric sharpener or sharpening stone may be used to sharpen and refine the blades of knife by stroking the knifes blade repeatedly over a surface of the sharpening apparatus.
- sharpening stones require certain maintenance or treatment such as by way of a wetting or lubricating process with the addition of based honing oil or petroleum based honing oil or other substances.
- the traditional sharpening stone can be large and awkward and may not be easy to store, so that many types of sharpening stones are cut and positioned on a knife sharpener base for convenient use.
- conventional knife sharpeners have certain disadvantages.
- a user typically needs to use one hand to hold the knife sharpener base and, meanwhile, use the other hand to hold the knife. This other hand must then slide the knife to be sharpened back and forth along the sharpening stone. This can sometimes present a potentially dangerous situation, especially for inexperienced users of such sharpening devices. Therefore, there remains a need for a new and improved design for a knife sharpener to overcome these types of potential problems and situations.
- Other disadvantages, inconveniences, and issues also exist with current sharpeners and sharpening methods.
- a sharpening apparatus comprises a cylindrical body comprising a first cylindrical body end and a second cylindrical body end, the cylindrical body defining a bore extending from the first cylindrical body end to the second cylindrical body end.
- a cylindrical shaft comprising a first shaft end and a second shaft end, the first shaft end defining a first shaft bore and the second shaft end side defining a second shaft bore.
- a first tubular member residing between the first shaft end and the first cylinder body side.
- a second tubular member provided between the second shaft end and the second cylinder body side.
- a first wheel comprising a first wheel stem, wherein the first wheel stem engages the first shaft bore defined by the cylindrical shaft.
- a second wheel comprising a second wheel stem, wherein the second wheel stem engages the second shaft bore defined by the cylindrical shaft.
- the first shaft bore comprises at least one beveled edge.
- the cylindrical body comprises a bore comprising a unitary diameter.
- the shaft comprises a stainless-steel shaft.
- an outer diameter of the cylindrical body is substantially equivalent to an outer diameter of the first wheel.
- the first shaft bore extends only along a portion of a length of the cylindrical shaft.
- the first wheel comprises stainless steel.
- the first wheel rotates simultaneously with the second wheel.
- the second wheel comprises a spiral raceway provided along a second surface of the second wheel.
- the spiral raceway is milled into the second surface of the second wheel at approximately a 90-degree angle.
- the first wheel comprises a second surface wherein a circular recess is milled along the second surface of the first wheel.
- the circular recess milled along the second surface of the first wheel comprises a first recess diameter.
- the first tubular member residing between the first shaft end and the first cylinder body side comprises a flange having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first flange diameter.
- the second wheel comprises a second surface wherein a circular recess is milled along the second surface of the second wheel.
- the first wheel stem removably engages the first shaft bore defined by the cylindrical shaft.
- FIG. 1 illustrates a cross-sectional view of a sharpening apparatus, according to an example embodiment
- FIG. 2 illustrates a perspective view of the sharpening apparatus illustrated in FIG. 1 ;
- FIG. 5 illustrates an exploded view of a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 1 ;
- the sharpening apparatus 10 device comprises a first wheel 400 and a second wheel 500 .
- Each wheel will have a grinding or a polishing surface.
- the first wheel 400 may be configured as a sharpening wheel or disc, for example an abrasive disc, which is attached to one end of an axis which is rotatably mounted in a handpiece.
- a second wheel 500 is attached, which has the same diameter as the sharpening wheel 400 , so that the sharpening device is stable and can roll on a flat surface.
- embodiments of the sharpening apparatus may use threaded engagement between wheel stems 420 , 520 and the shaft bore of cylindrical shaft 200 .
- threaded engagement allows for a more secure, yet still removable, attachment of the wheels 400 , 500 .
- Other advantages also exist.
- first end 110 and the second ends 120 are substantially smooth and planar. As will be described herein, both the first end 110 and the second end 120 are configured to guide or support a first wheel and a second wheel, respectively.
- a symbol, trademark, or company logo may be screen printed in a color, or otherwise placed, onto the cylindrical body 100 to allow for branding, trademarking, advertising, and the like.
- the cylindrical body 100 comprises a cylindrical or tubular shape having a size having outer diameter of approximately between about 50 to about 55 mm.
- the outer diameter of the cylindrical body 100 is substantially equivalent to an outer diameter of the first wheel or the second wheel of the sharpening apparatus 10 .
- the cylindrical body 100 comprises an inner bore of approximately between about 15 to about 25 mm.
- the outer diameter of the cylindrical body 100 is substantially the same size as the outer diameter of the first and the second wheel.
- the inner bore is a diameter that is substantially the same size as the outer diameter of the cylindrical shaft 200 .
- the cylindrical body 100 has a length of approximately between about 65 to about 75 mm. In one arrangement, the length of the cylindrical body 100 is substantially the same length as the cylindrical shaft 200 . As those of ordinary skill in the art having the benefit of this disclosure will recognize, alternative cylindrical body sizes and shapes may also be utilized.
- an outer diameter of the cylindrical body 100 is generally equivalent to an outer diameter of the first 400 and the second 500 wheels (without rubber ring 600 a,b ). In this manner, so that the outer surface of the cylindrical body 100 and the outer surfaces of the first and second wheels are even with each other in the assembled configuration.
- the sharpening apparatus 10 further comprises a cylindrical shaft 200 , preferably a tubular elongated shaft.
- a cylindrical shaft 200 preferably a tubular elongated shaft.
- FIG. 7 B illustrates a perspective view
- FIG. 7 A illustrates a cross-sectional view
- FIG. 7 C illustrates and end view of a cylindrical shaft 200 for use with a sharpening apparatus, such as the sharpening apparatus 10 illustrated in FIGS. 1 - 5 .
- the cylindrical shaft 200 may comprise a number of different materials, preferably a material such as stainless steel, for example corrosion resistant stainless steel.
- the cylindrical shaft 200 further comprises an outer surface 205 which in one embodiment comprises a smooth outer surface. In one arrangement, the outer surface of the cylindrical shaft 200 comprises a matte finish.
- the second shaft bore 240 comprises a second shaft bore length of approximately about 10 to about 12 mm along the body of the cylindrical shaft 200 .
- the second shaft bore 240 does not extend along the entire length of the cylindrical shaft 200 . Rather, the second shaft bore 240 only extends along a portion of the length of the cylindrical shaft 200 .
- the length of the first shaft bore 230 is substantially the same length as the second shaft bore 240 .
- the first shaft bore 230 has an entry point 232 along the first shaft end wherein the entry point 232 comprises a beveled edge or a chamfered edge 234 .
- this beveled edge 234 may comprise a symmetrical sloping edge.
- the second bore 240 of the cylindrical shaft 200 residing at the second end of the cylindrical shaft 200 is similarly configured as the first shaft bore 230 . That is, the second bore 240 extends along a portion of the length of the cylindrical shaft 200 .
- both shaft bore 230 and 240 may be threaded for engagement with wheel stems 420 , 520 .
- the cylindrical shaft 200 may have an outer diameter of approximately 15 to about 20 mm.
- Each of the first shaft bore 230 and the second shaft bore 240 will have an inner bore diameter of approximately about 5 to about 10 mm.
- the outer diameter of the cylindrical shaft 200 may be configured to be slightly smaller than the inner bore diameter of the cylindrical body 100 illustrated in FIG. 6 . This slightly smaller outer diameter is sized in order to take into account the thickness of the tubular wall of the tubular members that are positioned between the outer surface of the cylindrical body 100 and the outer surface of the cylindrical shaft 200 (see FIG. 4 ).
- first shaft bore and the second bore shaft will have an inner bore diameter of approximately about 5 to about 10 mm.
- the inner bore diameter of the first bore shaft and the second bore shaft are substantially equivalent.
- these inner bores function to engage the wheels.
- the first bore 230 is configured to engage the first wheel 400 and the second bore 240 is configured to engage the second wheel 500 .
- the first bore 230 is configured to removably engage a wheel stem 420 of the first wheel 400 and the second bore 240 is configured to removably engage a wheel stem 520 of the second wheel 500 .
- these wheel stem and cylindrical shaft engagements occur by way of threaded connection.
- alternative engagement methods may also be utilized.
- the cylindrical shaft 200 may comprise a length that is substantially equivalent to the length of the cylindrical body 100 . In one preferred arrangement, the cylindrical shaft 200 may comprise a length that is slightly longer than the length of the cylindrical body 100 . This slightly longer length of the cylindrical shaft 200 takes into account the size of the first tubular member 300 a that is seated near the first end 210 of the cylindrical shaft 200 and the size of the second tubular member 300 b seated within the second end 220 of the cylindrical shaft 200 . In one arrangement, the cylindrical shaft 200 comprises a length of approximately 65 to about 75 mm.
- the grinding wheels 400 , 500 are connected via the cylindrical shaft 200 and can therefore be rotated together, relative to the cylinder body 100 . On the one hand, this makes it easier to guide the sharpening apparatus 10 in a straight line along the knife edge that gets sharpened. On the other hand, the grinding wheels 400 , 500 are stabilized relative to the cylinder body 100 , so that tilting of the grinding wheels 400 , 500 can be reduced and therefore avoided.
- the first and second tubular members 300 a, b act as a bearing that constrains relative motion to only the desired motion.
- the tubular members 300 a, b reduce friction between rotating components, including the wheels 400 , 500 , the cylindrical body 100 , and the cylindrical shaft 200 .
- the tubular members comprise a self-lubricating, grease free plastic material such as those provided by igus motion plastics of Rumford, RI under the name of Iglide® (https://www.igus.com/info/plain-plastic-bearings), although other materials may also be used.
- the first and second tubular members 300 a, b may be constructed in a similar manner.
- the tubular member 300 extends from a first end 310 towards a second end 320 .
- the tubular member 300 comprises a main body 302 having an outer surface 305 and an inner surface 340 .
- the main body 302 extends from the second end towards the first end 310 .
- a collar or radially extending flange 330 is provided at the first end 310 of the tubular member.
- this flange 330 is generally of a circular shape and has an outer diameter that is generally larger than the outer diameter of the body of the cylindrical shaft 200 ( FIG. 7 ).
- the first tubular member 300 a With the sharpening apparatus 10 in an assembled state as illustrated in FIG. 4 , the first tubular member 300 a will be seated over an end of the cylindrical shaft 200 and thereby positioned between the cylindrical shaft 200 and the cylindrical body 100 . In this position, the radially extending flange 330 a of the first tubular member 300 a will reside between the cylindrical body 100 and the first wheel 400 . Specifically, the radially extending flange 330 a will be seated within a recess defined along the second surface 410 of the first wheel 400 and the cylindrical body 100 .
- the sharpening apparatus further comprises a first wheel 400 and a second wheel 500 .
- FIGS. 9 A-C illustrate various views of the first wheel 400 for use with a sharpening apparatus, such as the sharpening apparatus 10 illustrated in FIGS. 1 - 5 .
- FIGS. 10 A-D illustrate various views of the second wheel 500 for use with a sharpening apparatus, such as the sharpening apparatus 10 illustrated in FIGS. 1 - 5 .
- FIG. 9 A illustrates a perspective view of a first wheel 400 .
- the first wheel 400 comprises a substantially circular disk 415 comprising a first or outer surface 405 .
- the circular disk 415 further comprises a second surface or inner surface 410 .
- the first wheel 400 further comprises a first wheel stem 420 that extends in a vertical direction away from the second surface 410 . This first stem 420 is configured to engage the first shaft bore 230 defined by the cylindrical shaft 200 .
- the first surface 405 of the first wheel 400 comprises an abrasive diamond coated layer 440 (see FIG. 9 C ).
- the diamond coated layer 440 may comprise at least a grit size of D91. Other grit sizes may also be used.
- the first wheel 400 further comprises a concave cutout 460 that is provided along a radially extending portion of the disk of the first wheel 400 .
- this concave cutout 460 is machined along an outer surface 480 of this radially extending portion of the first wheel 400 .
- This concave cutout 460 extends along the entire circumference of the first wheel 400 .
- FIG. 10 A illustrates a perspective view of a second wheel 500 .
- the second wheel 500 is generally similar in construction to the first wheel 400 .
- the second wheel 500 comprises a substantially circular disk comprising a first surface 505 or outer surface.
- the circular disk further comprises a second surface 510 or inner surface.
- the second wheel 500 comprises a second wheel stem 520 that extends in a vertical direction away from the second surface 510 .
- This second wheel stem 520 is configured to engage the second shaft bore 240 defined by the cylindrical shaft 200 .
- the first surface 505 of the second wheel 500 comprises a spiral 540 which may be cut, etched, or otherwise machined into the first surface 505 .
- spiral 540 enables, among other things, fine honing of the knife being sharpened and allows any material removed from the knife edge a clear path to leave the knife. While shapes other than a spiral 540 may be used, the spiral 540 enables constant tracking along the knife edge as the sharpening apparatus rotates and moves in a linear direction along the knife edge. Other benefits also exist.
- the second wheel 500 further comprises a concave cutout 560 that is provided along a radially extending portion of the disk of the second wheel 500 .
- this concave cutout 560 is machined along an outer surface 580 of this radially extending portion of the second wheel 500 .
- This concave cutout 560 extends along the entire circumference of the second wheel 500 .
- This concave cutout 560 is configured to operatively engage an elastic member, such as the elastic ring 600 illustrated in FIGS. 11 A-B .
- an elastic member such as the elastic ring 600 illustrated in FIGS. 11 A-B .
- the elastic member 600 When operatively engaged with this cutout 560 , the elastic member 600 will allow the first and second wheels to rotate simultaneously.
- an outer diameter of the cylindrical body 100 ( FIG. 6 ) is substantially equivalent to an outer diameter of the second wheel 500 .
- this outer diameter of the second wheel 500 may be approximately 50 to about 60 mm.
- the elastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged this cutout 560 .
- the elastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/or second wheel 400 , 500 .
- the first wheel 400 rotates simultaneously with the second wheel 500 as a user rotates the sharpening apparatus 10 over a surface.
- a user places his or her hand on the cylindrical body 100 .
- the elastic members 600 a, b will frictionally engage the surface and this engagement will allow the first and second wheels to rotate.
- both the first wheel 400 and the second wheel 500 are operatively coupled to the cylindrical shaft 200 , both the first wheel 400 and the second wheel 500 operate simultaneously as the cylindrical shaft 200 rotates. And then both the cylindrical shaft 200 , the first wheel 400 and the second wheel 500 rotate in unison.
- the two outer surfaces of the wheels 400 , 500 are used to restore a sharp cutting edge.
- both grinding wheels 400 , 500 have different functions.
- one side of the first wheel 400 is provided with a coarse diamond layer 440 , which has a grit size of D91. This layer 440 is used for rough regrinding of the dulled or blunt blade.
- the diamond 440 is harder than stainless steel or other metal (blade) which results in a slight material removal and makes the cutting edge sharper.
- FIG. 12 illustrates a perspective view of an alternative arrangement of a sharpening apparatus 700 .
- the sharpening apparatus 700 comprises a cylindrical body 100 , a cylindrical shaft 850 , a first tubular element 300 a , a second tubular element 300 b , a first circular disk 800 a , a first wheel 900 a , a second circular disk 800 b , and a second wheel 900 b .
- both the first circular disk 800 a and the second circular disk 800 b are configured to receive the elastic members 600 a, b , respectively.
- the cylindrical body 10 , the cylindrical shaft 200 , the first tubular element 300 a , the second tubular element 300 b , and the elastic members 600 a, b illustrated in FIG. 12 are substantially similar to those same items as illustrated in FIGS. 1 - 5 .
- the sharpening apparatus 700 comprises a cylindrical body 100 wherein this cylindrical body 100 extends from a first cylindrical body end 110 and a second cylindrical body end 120 .
- the cylindrical body defines a bore 130 that extends from the first cylindrical body end 110 to the second cylindrical body end 120 .
- the sharpening apparatus 10 further comprises a cylindrical shaft 850 that extends from a first shaft end 860 and a shaft second 880 .
- the first shaft end 860 of the cylindrical shaft 850 defines a first shaft bore 830 and the second shaft end 880 defines a second shaft bore 840 .
- the sharpening apparatus 700 further comprises a first tubular member 300 a .
- This first tubular member 300 a is positioned adjacent the first shaft end and the first cylinder body side.
- a second tubular member 300 b is positioned adjacent the second shaft end and the second cylinder body end.
- the sharpening apparatus 700 further comprises a first wheel 900 a comprising a first wheel stem 920 .
- the first wheel stem 920 is configured to engage the first shaft bore 830 defined by the cylindrical shaft 850 .
- the sharpening apparatus 700 further comprises a second wheel 900 b comprising a second wheel stem 930 .
- the second wheel stem 930 is configured to engage the second shaft bore 840 defined by the cylindrical shaft 850 .
- the sharpening apparatus 700 further comprises a cylindrical shaft 850 , preferably a tubular elongated shaft.
- a cylindrical shaft 850 for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 12 .
- the cylindrical shaft 850 may comprise a length that is substantially equivalent to the length of the cylindrical body 100 .
- the cylindrical shaft 850 may comprise a main body length that is slightly longer than the length of the cylindrical body 100 . This slightly longer length of the main body of the cylindrical shaft 850 takes into account the size of the first tubular member 300 a that is seated near the first end of the cylindrical shaft 850 and the size of the second tubular member 300 b seated within the second end of the cylindrical shaft 850 .
- the cylindrical shaft 850 comprises a length of approximately 65 to about 75 mm.
- the first circular disk 800 a further comprises a concave cutout 810 that is provided along a radially extending portion of the disk of the first circular disk 800 a
- this concave cutout 810 is machined along an outer surface of this radially extending portion of the first circular disk 800 a .
- This concave cutout 810 extends along the entire circumference of the first circular disk 800 a.
- This concave cutout 810 is configured to operatively engage an elastic member, such as the elastic ring 600 illustrated in FIG. 11 .
- an elastic member such as the elastic ring 600 illustrated in FIG. 11 .
- the elastic member 600 When operatively engaged with this cutout 460 , the elastic member 600 will allow the first and second wheels 900 a,b to rotate simultaneously.
- an outer diameter of the cylindrical body 100 ( FIG. 6 ) is substantially equivalent to an outer diameter of the first circular disk 800 a .
- this outer diameter of the first circular disk 800 a may be approximately 50 to about mm.
- the elastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged this cutout 810 .
- the elastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/or second wheels 900 a, b.
- the second surface 822 of the first circular disk 800 a comprises a recess 824 that is milled along the second surface 822 .
- a recess 470 may comprise a circular recess.
- the circular recess 824 milled along the second surface 822 of the first circular disk 800 a may comprise a first recess diameter.
- this first recess diameter may have a diameter of approximately 25 to about 35 mm.
- the first tubular member 300 a residing in between the first shaft end 860 and the first cylinder body end 110 comprises a flange 310 a having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first recess diameter.
- the second circular disk 800 b is substantially similar in construction as to the first circular disk 800 a .
- the second circular disk 800 b further comprises a concave cutout 820 that is provided along a radially extending portion of the disk of the second circular disk 800 b .
- this concave cutout 820 is machined along an outer surface of this radially extending portion of the second circular disk 800 b .
- This concave cutout 820 extends along the entire circumference of the second circular disk 800 b.
- This concave cutout 820 is configured to operatively engage an elastic member, such as the elastic ring 600 illustrated in FIG. 11 .
- an elastic member such as the elastic ring 600 illustrated in FIG. 11 .
- the elastic member 600 will allow the first and second wheels to rotate simultaneously.
- an outer diameter of the cylindrical body 100 ( FIG. 6 ) is substantially equivalent to an outer diameter of the second circular disk 800 b .
- this outer diameter of the first circular disk 800 a may be approximately 50 to about 60 mm.
- the elastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged this cutout 460 .
- the elastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/or second wheel 400 , 500 .
- the second surface 832 of the second circular disk 800 b comprises a recess 834 that is milled along the second surface 832 .
- a recess 834 may comprise a circular recess.
- the circular recess 834 milled along the second surface 832 of the second circular disk 800 b may comprise a first recess diameter.
- this first recess diameter may have a diameter of approximately 25 to about 35 mm.
- the first tubular member 300 a residing in between the first shaft end 860 and the first cylinder body end 110 comprises a flange 310 a having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first flange diameter.
- the first tubular member 300 a With the sharpening apparatus 700 in an assembled state as illustrated in FIG. 12 , the first tubular member 300 a will be seated over an end of the cylindrical shaft 850 and thereby positioned between the cylindrical shaft 850 and the cylindrical body 100 . In this position, the radially extending flange 330 a of the first tubular member 300 a will reside between the cylindrical body 850 and the first circular disk 800 a . Specifically, the radially extending flange 330 a will be seated within a recess defined along the second surface 822 of the first circular disk 800 a and the cylindrical body 100 .
- the second tubular member 300 b With the sharpening apparatus 700 in an assembled state as illustrated in FIG. 12 , the second tubular member 300 b will be seated over an end of the cylindrical shaft 850 and thereby positioned between the cylindrical shaft 850 and the cylindrical body 100 in a similar manner. In this position, the radially extending flange 330 b of the second tubular member 300 a will reside between the cylindrical body 850 and the second circular disk 800 b . Specifically, the radially extending flange 330 b will be seated within a recess defined along the second surface 832 of the second circular disk 800 b and the cylindrical body 100 .
- both wheels 900 a, b comprise a corrosion-resistant stainless steel.
- wheels 900 a, b may be made of stainless steel are low-wear and can generally be manufactured with high precision and low manufacturing tolerances.
- the overall size and geometrical configuration of the first wheel 900 a may be substantially similar to the size of the second wheel 900 b .
- the outer diameter, the thickness, and the geometrical shape of the first wheel 900 a , and the wheel stem may be substantially similar to the second wheel 900 b .
- the size of the first wheel 900 a may be approximately about 50 to about 60 mm in diameter.
- the size of the second wheel 900 b may be approximately about 50 to about 60 mm in diameter.
- the first wheel 900 a comprises a substantially circular disk comprising a first or outer surface 905 a .
- the circular disk further comprises a second or inner surface 907 a .
- the first wheel 900 a further comprises a first wheel stem 920 that extends in a vertical direction away from the second surface 907 a .
- This first stem 920 is configured to engage the first shaft bore defined by the cylindrical shaft 850 .
- the first surface 905 a of the first wheel 900 a comprises a spiral 940 .
- the second wheel 900 b is generally similar in construction to the first wheel 900 a .
- the second wheel 900 b comprises a substantially circular disk comprising a first surface or outer surface.
- the circular disk further comprises a second surface or inner surface.
- the second wheel 900 b comprises a second wheel stem 920 that extends in a vertical direction away from the first surface 905 .
- This second wheel stem 920 is configured to engage the second shaft bore defined by the cylindrical shaft 850 .
- the first surface 905 b of the second wheel 900 b comprises an abrasive diamond coated layer as described herein.
- the diamond coated layer may comprise at least a grit size of D91. Other grit sizes may also be used.
- FIGS. 14 A-B and FIG. 15 A illustrate perspective views of a knife holder 1000 for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIGS. 1 - 5 .
- FIG. 15 D illustrates a cross sectional view of a knife holder 1000 for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIGS. 1 - 5 .
- Figure is a top view of a knife holder 100 in accordance with disclosed embodiments.
- the knife holder 1000 may comprise various materials.
- the knife holder comprises a material of Beech Wood colored and may have the following approximate dimensions 87 ⁇ 58 ⁇ 25 mm.
- the knife holder 1000 is used to hold a cutting tool (e.g., knife) to be ground or polished by means of magnetic force.
- a cutting tool e.g., knife
- the knife holder 1000 is used to properly position the blade of a roller grinder.
- the knife holder 1000 comprises a main body 1010 and this main body 1010 is made of solid wood.
- the main body 1010 is configured with two ends, a first end 1020 and a second end 1030 . At both the first and second ends define two different angular inclinations. These different angular inclinations represent the respective need of the knife to be sharpened.
- the first angular inclination 1040 defines a 15 degree angle is used for sharpening western shaped knives, such as the European chefs knife.
- the second angular inclination 1050 defines a 20 degree angle is usually used for steeper ground blades, often Japanese blades. Depending on whether the base grind of a knife is thin or wider, either the 15 degree or 20 degree angle is used. The goal is to ensure the optimum sharpening angle for the particular knife.
- two neodymium magnets 1060 a,b are glued or otherwise fastened into the wood on each side of the main body 1010 of the knife holder 1000 .
- a recess for each of these magnets may be drilled by milling.
- These two magnets 1060 a,b allow the blades to be held securely in the respective position for the grinding process.
- hard plastic pads 1050 are glued or otherwise fastened to both sides.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
A sharpening apparatus. A cylindrical body having a first cylindrical body end and a second cylindrical body end, the cylindrical body defining a bore extending from the first cylindrical body end to the second cylindrical body end. A cylindrical shaft comprising a first shaft end and a shaft second, the first shaft end defining a first shaft bore and the second shaft end side defining a second end bore. A first tubular member adjacent the first shaft end and the first cylinder body side and a second tubular member adjacent the second shaft end and the second cylinder body side. A first wheel comprising a first wheel stem, wherein the first wheel stem engages the first shaft bore defined by the cylindrical shaft. A second wheel comprising a second wheel stem, wherein the second wheel stem engages the second shaft bore defined by the cylindrical shaft.
Description
- This application, under 35 U.S.C. § 119, claims the benefit of U.S. Provisional Patent Application Ser. No. 63/346,308 filed on May 26, 2022, and entitled “Sharpening Apparatus,” the contents of which are hereby incorporated by reference herein.
- The present disclosure relates generally to a sharpening apparatus. More particularly, the present disclosure relates to a hand-held sharpening apparatus that can be used to sharpen a cutting or spreading implement, such as a kitchen knife or other similar type of implement. This sharpening apparatus enables a user to roll the sharpening apparatus to sharpen a cutting implement while the cutting implement is removably engaged to a magnetic knife holder.
- A cutting implement like a kitchen knife can become dull or not sharp over a period of use. Typically, to sharpen such a dull knife, a whetstone, sharpening stick, Bavarian sharpener, electric sharpener or sharpening stone may be used to sharpen and refine the blades of knife by stroking the knifes blade repeatedly over a surface of the sharpening apparatus.
- This process of grinding and honing can present certain challenges. For example, some sharpening stones require certain maintenance or treatment such as by way of a wetting or lubricating process with the addition of based honing oil or petroleum based honing oil or other substances. In addition, the traditional sharpening stone can be large and awkward and may not be easy to store, so that many types of sharpening stones are cut and positioned on a knife sharpener base for convenient use.
- Further, conventional knife sharpeners have certain disadvantages. For example, when using a conventional knife sharpener, a user typically needs to use one hand to hold the knife sharpener base and, meanwhile, use the other hand to hold the knife. This other hand must then slide the knife to be sharpened back and forth along the sharpening stone. This can sometimes present a potentially dangerous situation, especially for inexperienced users of such sharpening devices. Therefore, there remains a need for a new and improved design for a knife sharpener to overcome these types of potential problems and situations. Other disadvantages, inconveniences, and issues also exist with current sharpeners and sharpening methods.
- Accordingly, the herein disclosed embodiments address the above, and other, disadvantages, inconveniences, and issues that exist with current sharpeners and sharpening methods.
- According to an exemplary arrangement, a sharpening apparatus comprises a cylindrical body comprising a first cylindrical body end and a second cylindrical body end, the cylindrical body defining a bore extending from the first cylindrical body end to the second cylindrical body end. A cylindrical shaft comprising a first shaft end and a second shaft end, the first shaft end defining a first shaft bore and the second shaft end side defining a second shaft bore. A first tubular member residing between the first shaft end and the first cylinder body side. A second tubular member provided between the second shaft end and the second cylinder body side. A first wheel comprising a first wheel stem, wherein the first wheel stem engages the first shaft bore defined by the cylindrical shaft. A second wheel comprising a second wheel stem, wherein the second wheel stem engages the second shaft bore defined by the cylindrical shaft.
- According to another arrangement, the second wheel comprises a first surface defining a spiral.
- According to another arrangement, the cylinder comprises a beech wood, walnut wood, or oak wood treated surface.
- According to another arrangement, the first shaft bore comprises at least one beveled edge.
- According to another arrangement, the bore extending from the first cylindrical body side to the second cylindrical body side comprises a central bore.
- According to another arrangement, the cylindrical body comprises a bore comprising a unitary diameter.
- According to another arrangement, the shaft comprises a stainless-steel shaft.
- According to another arrangement, an outer diameter of the cylindrical body is substantially equivalent to an outer diameter of the first wheel.
- According to another arrangement, the first shaft bore extends only along a portion of a length of the cylindrical shaft.
- According to another arrangement, the first shaft bore extends substantially along a length of the cylindrical shaft.
- According to another arrangement, the cylindrical body comprises a logo screen printed on at least one surface.
- According to another arrangement, the first wheel comprises a first surface, this first surface comprising an abrasive diamond coated layer. According to another arrangement, the diamond layer comprises at least a grit size of D91.
- According to another arrangement, the first wheel comprises stainless steel.
- According to another arrangement, the first wheel rotates simultaneously with the second wheel.
- According to another arrangement, the first wheel comprises a concave cutout along a radially extending portion of the first wheel. According to another arrangement, an elastic member placed within the concave cutout.
- According to another arrangement, the second wheel comprises a spiral raceway provided along a second surface of the second wheel. According to another arrangement, the spiral raceway is milled into the second surface of the second wheel at approximately a 90-degree angle.
- According to another arrangement, the first wheel comprises a second surface wherein a circular recess is milled along the second surface of the first wheel. According to another arrangement, the circular recess milled along the second surface of the first wheel comprises a first recess diameter. According to another arrangement, the first tubular member residing between the first shaft end and the first cylinder body side comprises a flange having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first flange diameter.
- According to another arrangement, the second wheel comprises a second surface wherein a circular recess is milled along the second surface of the second wheel.
- According to another arrangement, the first wheel stem removably engages the first shaft bore defined by the cylindrical shaft.
- Other embodiments also exist. The features, functions, and advantages can be achieved independently in various embodiments of the present disclosure or may be combined in yet other embodiments in which further details can be seen with reference to the following description and drawings.
- The novel features believed characteristic of the illustrative embodiments are set forth in the appended claims. The illustrative embodiments, however, as well as a preferred mode of use, further objectives and descriptions thereof, will best be understood by reference to the following detailed description of one or more illustrative embodiments of the present disclosure when read in conjunction with the accompanying drawings, wherein:
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FIG. 1 illustrates a cross-sectional view of a sharpening apparatus, according to an example embodiment; -
FIG. 2 illustrates a perspective view of the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 3 illustrates another perspective view of the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 4 illustrates a cross-sectional view of the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 5 illustrates an exploded view of a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 6 illustrates a cylindrical body for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIGS. 7A-C illustrate components of a cylindrical shaft for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 8 illustrates a tubular member for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIGS. 9A-C illustrate various views of a first wheel for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIGS. 10A-D illustrate various views of a second wheel for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIGS. 11A-B illustrate side and cross-sectional views of an elastic member for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 12 illustrates a cross-sectional view of an alternative arrangement for the sharpening apparatus illustrated inFIG. 1 ; -
FIG. 13 illustrates a cylindrical shaft for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 12 ; -
FIGS. 14A-B illustrate perspective views of mounting block that may be used with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 ; and -
FIGS. 15A-D illustrate various views of mounting block that may be used with a sharpening apparatus. - While the disclosure is susceptible to various modifications and alternative forms, specific embodiments have been shown by way of example in the drawings and will be described in detail herein. However, it should be understood that the disclosure is not intended to be limited to the particular forms disclosed. Rather, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
- The following detailed description describes various features and functions of the disclosed systems and methods with reference to the accompanying figures. The illustrative system and method embodiments described herein are not meant to be limiting. It may be readily understood that certain aspects of the disclosed systems and methods can be arranged and combined in a wide variety of different configurations, all of which are contemplated herein.
- Further, unless context suggests otherwise, the features illustrated in each of the figures may be used in combination with one another. Thus, the figures should be generally viewed as component aspects of one or more overall implementations, with the understanding that not all illustrated features are necessary for each implementation.
- Additionally, any enumeration of elements, blocks, or steps in this specification or the claims is for purposes of clarity. Thus, such enumeration should not be interpreted to require or imply that these elements, blocks, or steps adhere to a particular arrangement or are carried out in a particular order.
- By the term “substantially” it is meant that the recited characteristic, parameter, or value need not be achieved exactly, but that deviations or variations, including for example, tolerances, measurement error, measurement accuracy limitations and other factors known to skill in the art, may occur in amounts that do not preclude the effect the characteristic was intended to provide.
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FIGS. 2 and 3 illustrate perspective views of a sharpeningapparatus 10 according to an exemplary arrangement. Such a sharpeningapparatus 10 can be used for sharpening, grinding and/or polishing cutting tools, in particular knives for use in the kitchen and household. More particularly, the sharpeningapparatus 10 relates to a device that can be manually manipulated or rolled along a surface. Two sharpening or polishing circular wheels ordiscs wheels 400 may be used for sharpening whereas thesecond wheel 500 may be used as a finishing step for polishing or refining the sharpened blade. - With such a sharpening
apparatus 10, each wheel ordisc wheels handle 100 and therefore moves the sharpening apparatus back and forth on this surface. To position the knife and therefore blade of the knife properly and at a correct angle, the knife is removably attached to a mounting block. In this manner, the blade will reside at the proper angle and therotating wheels FIGS. 14 and 15 . - As noted, the sharpening
apparatus 10 device comprises afirst wheel 400 and asecond wheel 500. Each wheel will have a grinding or a polishing surface. In one arrangement, thefirst wheel 400 may be configured as a sharpening wheel or disc, for example an abrasive disc, which is attached to one end of an axis which is rotatably mounted in a handpiece. At the other end of the axis asecond wheel 500 is attached, which has the same diameter as the sharpeningwheel 400, so that the sharpening device is stable and can roll on a flat surface. After the knife to be sharpened is clamped in position with respect to the flat surface, the sharpeningdevice 10 is rolled back and forth on the surface with the end face of the sharpening disc resting on the cutting edge of the knife to be sharpened and this cutting edge at an angle suitable for cutting is sharpened. - If the sharpening apparatus is rolled along a surface, then the two
wheels device body 10. If a cutting edge of the cutting tool is applied to the first wheel and the device body is pulled over the surface in particular by hand, then the grinding surface of the first rotating or rotating disc grinds the cutting tool edge. -
FIGS. 14 and 15 illustrate amounting block 1000 for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 1 . According to one arrangement, thismounting block 1000 comprises a magnetic grinding gauge with which the cutting tool to be ground is releasably held at a desired cutting angle with respect to the rotating grinding wheel. - The sharpening
apparatus 10 is a hand-operated device for grinding and/or polishing a knife edge. Overall, such a design is provided that each wheel can roll on a flat surface and rotate with respect to the handle when the user has placed this roller grinder on this surface and grips the handle and thus moves the roller grinder back and forth on this surface which holds the knife to be treated in a defined arrangement, and one of the rotating disk surfaces contacts the cutting edge and grinds or polishes. In a roller grinder set according to the present disclosure, in addition to the roller grinder, a positioning body to be arranged on the flat base is provided. In one preferred arrangement, this positioning body is configured so that a releasably attached knife to be treated can be held in a defined orientation so that a rotating and rotating disc on this base can optimally grind or polish the knife edge. -
FIG. 1 illustrates a cross-sectional view of a sharpeningapparatus 10 ofFIGS. 2-3 . As illustrated, the sharpeningapparatus 10 comprises acylindrical body 100, acylindrical shaft 200, a firsttubular element 300 a, a secondtubular element 300 b, afirst wheel 400, and asecond wheel 500. As illustrated, both thefirst wheel 400 and thesecond wheel 500 are configured to receive anelastic member 600 a,b.FIG. 2 illustrates another perspective view of the sharpeningapparatus 10 illustrating thefirst wheel 400. AndFIG. 3 illustrates another perspective view of the sharpeningapparatus 10 illustrating thesecond wheel 500.FIG. 4 illustrates another cross-sectional view of the sharpeningapparatus 10 andFIG. 5 illustrates an exploded view of the sharpeningapparatus 10. - Referring now to
FIGS. 1-5 , the sharpeningapparatus 10 comprises acylindrical body 100 wherein thiscylindrical body 100 extends from a firstcylindrical body end 110 and a secondcylindrical body end 120. The cylindrical body defines abore 130 that extends from the firstcylindrical body end 110 to the secondcylindrical body end 120. The sharpeningapparatus 10 further comprises acylindrical shaft 200 that extends from afirst shaft end 210 to asecond shaft end 220. Thefirst shaft 300 atend 210 of thecylindrical shaft 200 defines a first shaft bore 230 and thesecond shaft end 220 defines a second end bore 240. - As illustrated, the sharpening
apparatus 10 further comprises a firsttubular member 300 a. This firsttubular member 300 a is positioned adjacent thefirst shaft end 110 and the first cylinder body side. In addition, a secondtubular member 300 b is positioned adjacent thesecond shaft end 120 and the second cylinder body side. The sharpeningapparatus 10 further comprises afirst wheel 400 comprising afirst wheel stem 420. Thefirst wheel stem 420 is configured to engage the first shaft bore defined by thecylindrical shaft 200. The sharpeningapparatus 10 further comprises asecond wheel 500 comprising asecond wheel stem 520. Thesecond wheel stem 520 is configured to engage the second shaft bore defined by thecylindrical shaft 200. As indicated, embodiments of the sharpening apparatus may use threaded engagement between wheel stems 420, 520 and the shaft bore ofcylindrical shaft 200. Among other things, threaded engagement allows for a more secure, yet still removable, attachment of thewheels -
FIG. 6 illustrates a perspective view of acylindrical body 100 for use with a sharpening apparatus, such as the sharpeningapparatus 10 illustrated inFIG. 1 . As illustrated, the sharpeningapparatus 10 comprises acylindrical body 100 having a body that extends from a firstcylindrical body end 110 to a secondcylindrical body end 120. Thecylindrical body 100 comprises an outer surface 102 and thiscylindrical body 100 defines an inner bore orcavity 130. In one arrangement, thisinner bore 130 extends from the firstcylindrical body end 110 to the secondcylindrical body end 120 and comprises a bore that is centrally located within thecylindrical body 100. In one arrangement, thecylindrical body 100 includes a bore comprising a unitary diameter or a diameter having a substantially constant diameter across at least a portion of the length of thecylindrical body 100. - The
cylindrical body 100 may comprise a material such as a dark brown colored beech wood, walnut wood, oak wood, solid wood, surface treated, and also have a matte finish. As those of ordinary skill in the art having the benefit of this disclosure will recognize, alternative materials may also be used. Preferably, theouter surface 140 of thecylindrical body 100 comprises an outer surface that is smooth. - In one preferred arrangement, the
first end 110 and the second ends 120 are substantially smooth and planar. As will be described herein, both thefirst end 110 and thesecond end 120 are configured to guide or support a first wheel and a second wheel, respectively. - In one preferred arrangement, a symbol, trademark, or company logo may be screen printed in a color, or otherwise placed, onto the
cylindrical body 100 to allow for branding, trademarking, advertising, and the like. In one exemplary arrangement, thecylindrical body 100 comprises a cylindrical or tubular shape having a size having outer diameter of approximately between about 50 to about 55 mm. As just one example, the outer diameter of thecylindrical body 100 is substantially equivalent to an outer diameter of the first wheel or the second wheel of the sharpeningapparatus 10. - In one arrangement, the
cylindrical body 100 comprises an inner bore of approximately between about 15 to about 25 mm. In one preferred arrangement, the outer diameter of thecylindrical body 100 is substantially the same size as the outer diameter of the first and the second wheel. In one preferred arrangement, the inner bore is a diameter that is substantially the same size as the outer diameter of thecylindrical shaft 200. - In addition, the
cylindrical body 100 has a length of approximately between about 65 to about 75 mm. In one arrangement, the length of thecylindrical body 100 is substantially the same length as thecylindrical shaft 200. As those of ordinary skill in the art having the benefit of this disclosure will recognize, alternative cylindrical body sizes and shapes may also be utilized. - In one preferred arrangement, an outer diameter of the
cylindrical body 100 is generally equivalent to an outer diameter of the first 400 and the second 500 wheels (withoutrubber ring 600 a,b). In this manner, so that the outer surface of thecylindrical body 100 and the outer surfaces of the first and second wheels are even with each other in the assembled configuration. - The sharpening
apparatus 10 further comprises acylindrical shaft 200, preferably a tubular elongated shaft. For example,FIG. 7B illustrates a perspective view,FIG. 7A illustrates a cross-sectional view, andFIG. 7C illustrates and end view of acylindrical shaft 200 for use with a sharpening apparatus, such as the sharpeningapparatus 10 illustrated inFIGS. 1-5 . Thecylindrical shaft 200 may comprise a number of different materials, preferably a material such as stainless steel, for example corrosion resistant stainless steel. Thecylindrical shaft 200 further comprises anouter surface 205 which in one embodiment comprises a smooth outer surface. In one arrangement, the outer surface of thecylindrical shaft 200 comprises a matte finish. - The elongated shaft comprises a
main body 205 that extends from afirst shaft end 210 to asecond shaft end 220. In one preferred arrangement, both thefirst shaft end 210 and thesecond shaft end 220 are substantially smooth and are substantially parallel to one another. As illustrated, thefirst shaft end 210 of the main body of thecylindrical shaft 200 comprises afirst shaft bore 230. In this illustrated arrangement, the first shaft bore 230 extends a shaft bore length of approximately about 10 to about 12 mm along the body of thecylindrical shaft 200. In one preferred arrangement, the first shaft bore 230 does not extend along the entire length of thecylindrical shaft 200. Rather, the first shaft bore 230 only extends along a portion of the length of thecylindrical shaft 200. - Similarly, the second shaft bore 240 comprises a second shaft bore length of approximately about 10 to about 12 mm along the body of the
cylindrical shaft 200. In one preferred arrangement, the second shaft bore 240 does not extend along the entire length of thecylindrical shaft 200. Rather, the second shaft bore 240 only extends along a portion of the length of thecylindrical shaft 200. In one arrangement, the length of the first shaft bore 230 is substantially the same length as the second shaft bore 240. - As illustrated, the first shaft bore 230 has an
entry point 232 along the first shaft end wherein theentry point 232 comprises a beveled edge or achamfered edge 234. For example, thisbeveled edge 234 may comprise a symmetrical sloping edge. In one arrangement, thesecond bore 240 of thecylindrical shaft 200 residing at the second end of thecylindrical shaft 200 is similarly configured as thefirst shaft bore 230. That is, thesecond bore 240 extends along a portion of the length of thecylindrical shaft 200. As illustrated, both shaft bore 230 and 240 may be threaded for engagement with wheel stems 420, 520. - One preferred arrangement, the
cylindrical shaft 200 may have an outer diameter of approximately 15 to about 20 mm. Each of the first shaft bore 230 and the second shaft bore 240 will have an inner bore diameter of approximately about 5 to about 10 mm. The outer diameter of thecylindrical shaft 200 may be configured to be slightly smaller than the inner bore diameter of thecylindrical body 100 illustrated inFIG. 6 . This slightly smaller outer diameter is sized in order to take into account the thickness of the tubular wall of the tubular members that are positioned between the outer surface of thecylindrical body 100 and the outer surface of the cylindrical shaft 200 (seeFIG. 4 ). - Each of the first shaft bore and the second bore shaft will have an inner bore diameter of approximately about 5 to about 10 mm. In one arrangement, the inner bore diameter of the first bore shaft and the second bore shaft are substantially equivalent. As will be explained in greater detail herein, these inner bores function to engage the wheels. Specifically, the
first bore 230 is configured to engage thefirst wheel 400 and thesecond bore 240 is configured to engage thesecond wheel 500. More specifically, thefirst bore 230 is configured to removably engage awheel stem 420 of thefirst wheel 400 and thesecond bore 240 is configured to removably engage awheel stem 520 of thesecond wheel 500. In one preferred arrangement, these wheel stem and cylindrical shaft engagements occur by way of threaded connection. However, as those of ordinary skill in the art having benefit of this disclosure will recognize, alternative engagement methods may also be utilized. - In one preferred arrangement, the
cylindrical shaft 200 may comprise a length that is substantially equivalent to the length of thecylindrical body 100. In one preferred arrangement, thecylindrical shaft 200 may comprise a length that is slightly longer than the length of thecylindrical body 100. This slightly longer length of thecylindrical shaft 200 takes into account the size of the firsttubular member 300 a that is seated near thefirst end 210 of thecylindrical shaft 200 and the size of the secondtubular member 300 b seated within thesecond end 220 of thecylindrical shaft 200. In one arrangement, thecylindrical shaft 200 comprises a length of approximately 65 to about 75 mm. - For sharpening of a knife edge, a stable and straightforward motion of the rolling sharpener is advantageous. The grinding
wheels cylindrical shaft 200 and can therefore be rotated together, relative to thecylinder body 100. On the one hand, this makes it easier to guide the sharpeningapparatus 10 in a straight line along the knife edge that gets sharpened. On the other hand, the grindingwheels cylinder body 100, so that tilting of the grindingwheels - The sharpening
apparatus 10 further comprises a firsttubular member 300 a and a secondtubular member 300 b. In one preferred arrangement, the firsttubular member 300 a is substantially identical to the secondtubular member 300 b. For example,FIG. 8 illustrates a perspective view of atubular member 300 for use with a sharpening apparatus, such as the sharpeningapparatus 10 illustrated inFIGS. 1-4 . Thetubular member 300 may comprise a number of different materials, preferably a material such as a low friction plastic. Thetubular member 300 further comprises anouter surface 302 which in one embodiment comprises a smooth outer surface. In one arrangement, theouter surface 302 of thetubular member 300 comprises a matte finish. - The first and second
tubular members 300 a, b act as a bearing that constrains relative motion to only the desired motion. In addition, thetubular members 300 a, b reduce friction between rotating components, including thewheels cylindrical body 100, and thecylindrical shaft 200. In one preferred arrangement, the tubular members comprise a self-lubricating, grease free plastic material such as those provided by igus motion plastics of Rumford, RI under the name of Iglide® (https://www.igus.com/info/plain-plastic-bearings), although other materials may also be used. The first and secondtubular members 300 a, b may be constructed in a similar manner. - As illustrated in
FIG. 8 , thetubular member 300 extends from afirst end 310 towards asecond end 320. Thetubular member 300 comprises amain body 302 having anouter surface 305 and aninner surface 340. Themain body 302 extends from the second end towards thefirst end 310. At thefirst end 310 of the tubular member a collar or radially extendingflange 330 is provided. As illustrated, thisflange 330 is generally of a circular shape and has an outer diameter that is generally larger than the outer diameter of the body of the cylindrical shaft 200 (FIG. 7 ). - With the sharpening
apparatus 10 in an assembled state as illustrated inFIG. 4 , the firsttubular member 300 a will be seated over an end of thecylindrical shaft 200 and thereby positioned between thecylindrical shaft 200 and thecylindrical body 100. In this position, the radially extending flange 330 a of the firsttubular member 300 a will reside between thecylindrical body 100 and thefirst wheel 400. Specifically, the radially extending flange 330 a will be seated within a recess defined along thesecond surface 410 of thefirst wheel 400 and thecylindrical body 100. - Wheels
- As illustrated in
FIGS. 1-5 , the sharpening apparatus further comprises afirst wheel 400 and asecond wheel 500.FIGS. 9A-C illustrate various views of thefirst wheel 400 for use with a sharpening apparatus, such as the sharpeningapparatus 10 illustrated inFIGS. 1-5 . AndFIGS. 10A-D illustrate various views of thesecond wheel 500 for use with a sharpening apparatus, such as the sharpeningapparatus 10 illustrated inFIGS. 1-5 . - In one arrangement, the first and
second wheels wheels wheels - The overall size and geometrical configuration of the
first wheel 400 may be substantially similar to the size of thesecond wheel 500. For example, the outer diameter, the thickness, and the geometrical shape of the first wheel, and the wheel stem may be substantially similar to thesecond wheel 500. As just one example, the size of thefirst wheel 400 may be approximately about 50 to about 60 mm in diameter. Similarly, the size of thesecond wheel 500 may be approximately about 50 to about 60 mm in diameter. -
FIG. 9A illustrates a perspective view of afirst wheel 400. As illustrated, thefirst wheel 400 comprises a substantiallycircular disk 415 comprising a first orouter surface 405. Thecircular disk 415 further comprises a second surface orinner surface 410. In this illustrated embodiment, thefirst wheel 400 further comprises afirst wheel stem 420 that extends in a vertical direction away from thesecond surface 410. Thisfirst stem 420 is configured to engage the first shaft bore 230 defined by thecylindrical shaft 200. - In a preferred arrangement, the
first surface 405 of thefirst wheel 400 comprises an abrasive diamond coated layer 440 (seeFIG. 9C ). For example, the diamond coatedlayer 440 may comprise at least a grit size of D91. Other grit sizes may also be used. - As illustrated, the
first wheel 400 further comprises aconcave cutout 460 that is provided along a radially extending portion of the disk of thefirst wheel 400. Preferably, thisconcave cutout 460 is machined along anouter surface 480 of this radially extending portion of thefirst wheel 400. Thisconcave cutout 460 extends along the entire circumference of thefirst wheel 400. - This
concave cutout 460 is configured to operatively engage an elastic member, such as theelastic ring 600 illustrated inFIGS. 11A-B . When operatively engaged with thiscutout 460, theelastic member 600 will allow the first and second wheels to rotate simultaneously. In an arrangement, an outer diameter of the cylindrical body 100 (FIG. 6 ) is substantially equivalent to an outer diameter of thefirst wheel 400. For example, this outer diameter of thefirst wheel 400 may be approximately 50 to about 60 mm. Theelastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged thiscutout 460. For example, theelastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/orsecond wheel - In an arrangement, the
second surface 410 of thefirst wheel 400 comprises arecess 470 that is milled along thesecond surface 410. Such arecess 470 may comprise a circular recess. For example, thecircular recess 470 milled along thesecond surface 410 of thefirst wheel 400 may comprise a first recess diameter. As an example, this first recess diameter may have a diameter of approximately 25 to about 35 mm. With such a recess configuration, when the sharpeningapparatus 10 is assembled for use as illustrated inFIGS. 1-5 , the firsttubular member 300 a residing in between thefirst shaft end 210 and the firstcylinder body end 110 comprises a flange 310 a having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first flange diameter. -
FIG. 10A illustrates a perspective view of asecond wheel 500. In an arrangement, thesecond wheel 500 is generally similar in construction to thefirst wheel 400. As illustrated, similar to thefirst wheel 400, thesecond wheel 500 comprises a substantially circular disk comprising afirst surface 505 or outer surface. The circular disk further comprises asecond surface 510 or inner surface. In this illustrated embodiment, thesecond wheel 500 comprises asecond wheel stem 520 that extends in a vertical direction away from thesecond surface 510. Thissecond wheel stem 520 is configured to engage the second shaft bore 240 defined by thecylindrical shaft 200. - In a preferred arrangement, the
first surface 505 of thesecond wheel 500 comprises a spiral 540 which may be cut, etched, or otherwise machined into thefirst surface 505. As disclosed herein, spiral 540 enables, among other things, fine honing of the knife being sharpened and allows any material removed from the knife edge a clear path to leave the knife. While shapes other than a spiral 540 may be used, thespiral 540 enables constant tracking along the knife edge as the sharpening apparatus rotates and moves in a linear direction along the knife edge. Other benefits also exist. - As illustrated, the
second wheel 500 further comprises aconcave cutout 560 that is provided along a radially extending portion of the disk of thesecond wheel 500. Preferably, thisconcave cutout 560 is machined along anouter surface 580 of this radially extending portion of thesecond wheel 500. Thisconcave cutout 560 extends along the entire circumference of thesecond wheel 500. - This
concave cutout 560 is configured to operatively engage an elastic member, such as theelastic ring 600 illustrated inFIGS. 11A-B . When operatively engaged with thiscutout 560, theelastic member 600 will allow the first and second wheels to rotate simultaneously. In an arrangement, an outer diameter of the cylindrical body 100 (FIG. 6 ) is substantially equivalent to an outer diameter of thesecond wheel 500. For example, this outer diameter of thesecond wheel 500 may be approximately 50 to about 60 mm. Theelastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged thiscutout 560. For example, theelastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/orsecond wheel - In an arrangement, the
second surface 510 of thesecond wheel 500 comprises arecess 570 that is milled along thesecond surface 510. Such arecess 570 may comprise a circular recess. For example, thecircular recess 570 milled along thesecond surface 510 of thesecond wheel 500 may comprise a first recess diameter. As an example, this first recess diameter may have a diameter of approximately 25 to about 35 mm. With such a recess configuration, when the sharpeningapparatus 10 is assembled for use as illustrated inFIGS. 1-5 , the secondtubular member 300 b residing in between thesecond shaft end 220 and the secondcylinder body end 120 comprises a flange 310 b having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first flange diameter. - As configured in the sharpening
apparatus 10 as assembled, thefirst wheel 400 rotates simultaneously with thesecond wheel 500 as a user rotates the sharpeningapparatus 10 over a surface. For example, to rotate both first andsecond wheels apparatus 10, a user places his or her hand on thecylindrical body 100. As the user handles thecylindrical body 100 and rolls theapparatus 10 along a surface, theelastic members 600 a, b will frictionally engage the surface and this engagement will allow the first and second wheels to rotate. And since both thefirst wheel 400 and thesecond wheel 500 are operatively coupled to thecylindrical shaft 200, both thefirst wheel 400 and thesecond wheel 500 operate simultaneously as thecylindrical shaft 200 rotates. And then both thecylindrical shaft 200, thefirst wheel 400 and thesecond wheel 500 rotate in unison. - As illustrated in
FIG. 4 , there is a distance D between thefirst end 110 of thecylindrical body 100 and the first orinner surface 410 of thefirst wheel 400 so that a sufficient amount of play or distance is created such that between thecylindrical body 100 and the twogrinding wheels - The two outer surfaces of the
wheels wheels first wheel 400 is provided with acoarse diamond layer 440, which has a grit size of D91. Thislayer 440 is used for rough regrinding of the dulled or blunt blade. Thediamond 440 is harder than stainless steel or other metal (blade) which results in a slight material removal and makes the cutting edge sharper. - After the rough pre-grinding with
diamond layer 440, anouter surface 505 of thesecond wheel 500 is applied in the same process. This surface is made of stainless steel and has a spiralgrained raceway 540. In one arrangement, this spiral-grained raceway 540 is milled into the surface at a 90% angle. Thispattern 540 allows the already pre-sharpened cutting edge to be honed even more effectively. When rolling, thespiral 540 has the effect that the milled out circular areas touch the cutting edge and allow an even finer removal of the blade material. This makes the cutting edge finely ground and even sharper. Other advantages also exist. - Both
wheels cylindrical shaft 200. In the preferred embodiments disclosed herein a threaded or screw fit is used. However, as those of ordinary skill in the art having the benefit of this disclosure will recognize, alternative connection methods and mechanism may also be utilized. In this way, the first andsecond wheels apparatus 10 and a tilting of thewheels -
FIG. 12 illustrates a perspective view of an alternative arrangement of a sharpeningapparatus 700. As illustrated, the sharpeningapparatus 700 comprises acylindrical body 100, acylindrical shaft 850, a firsttubular element 300 a, a secondtubular element 300 b, a firstcircular disk 800 a, afirst wheel 900 a, a secondcircular disk 800 b, and asecond wheel 900 b. As illustrated, both the firstcircular disk 800 a and the secondcircular disk 800 b are configured to receive theelastic members 600 a, b, respectively. Thecylindrical body 10, thecylindrical shaft 200, the firsttubular element 300 a, the secondtubular element 300 b, and theelastic members 600 a, b illustrated inFIG. 12 are substantially similar to those same items as illustrated inFIGS. 1-5 . - Referring now to
FIG. 12 , the sharpeningapparatus 700 comprises acylindrical body 100 wherein thiscylindrical body 100 extends from a firstcylindrical body end 110 and a secondcylindrical body end 120. The cylindrical body defines abore 130 that extends from the firstcylindrical body end 110 to the secondcylindrical body end 120. The sharpeningapparatus 10 further comprises acylindrical shaft 850 that extends from afirst shaft end 860 and a shaft second 880. Thefirst shaft end 860 of thecylindrical shaft 850 defines a first shaft bore 830 and thesecond shaft end 880 defines a second shaft bore 840. - As illustrated, the sharpening
apparatus 700 further comprises a firsttubular member 300 a. This firsttubular member 300 a is positioned adjacent the first shaft end and the first cylinder body side. In addition, a secondtubular member 300 b is positioned adjacent the second shaft end and the second cylinder body end. The sharpeningapparatus 700 further comprises afirst wheel 900 a comprising afirst wheel stem 920. Thefirst wheel stem 920 is configured to engage the first shaft bore 830 defined by thecylindrical shaft 850. The sharpeningapparatus 700 further comprises asecond wheel 900 b comprising asecond wheel stem 930. Thesecond wheel stem 930 is configured to engage the second shaft bore 840 defined by thecylindrical shaft 850. - As illustrated, the sharpening
apparatus 700 further comprises a firstcircular disk 800 a and a secondcircular disk 800 b. In one arrangement, the first circulatedisk 800 a is positioned between thefirst wheel 900 a and the first end of thecylindrical body 100. In this configuration, thestem 920 of thefirst wheel 900 a is configured to extend through an aperture defined by the firstcircular disk 800 a. Similarly, in this configuration, thestem 930 of thesecond wheel 900 b is configured to extend through an aperture defined by the secondcircular disk 800 b. - The sharpening
apparatus 700 further comprises acylindrical shaft 850, preferably a tubular elongated shaft. For example,FIG. 13 illustrates a perspective view of acylindrical shaft 850 for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIG. 12 . - The
elongated shaft 850 comprises a main 852 body that extends from afirst shaft end 860 to asecond shaft end 880. In one preferred arrangement, both thefirst shaft end 860 and thesecond shaft end 880 are substantially smooth and are substantially parallel to one another. As illustrated, thefirst shaft end 860 of the main body of thecylindrical shaft 850 comprises afirst shaft bore 865. In this illustrated arrangement, the first shaft bore 865 extends a shaft bore length of approximately about 10 to about 12 mm along the body of thecylindrical shaft 850. In one preferred arrangement, the first shaft bore 865 does not extend along the entire length of thecylindrical shaft 850. Rather, the first shaft bore 865 only extends along a portion of the length of thecylindrical shaft 850. - Similarly, the second shaft bore 885 extends a second shaft bore length of approximately about 10 to about 12 mm along the body of the
cylindrical shaft 850. In one preferred arrangement, the second shaft bore 885 does not extend along the entire length of thecylindrical shaft 850. Rather, the second shaft bore 885 only extends along a portion of the length of thecylindrical shaft 850. In one arrangement, the length of the first shaft bore 865 is substantially the same length as the second shaft bore 885. In one arrangement, thesecond bore 885 of thecylindrical shaft 850 residing at the second end of thecylindrical shaft 850 is similarly configured as thefirst shaft bore 865. That is, thesecond bore 885 extends along a portion of the length of thecylindrical shaft 850. - One preferred arrangement, the
cylindrical shaft 850 may have an outer diameter of approximately 15 to about 20 mm. Each of the first shaft bore 865 and the second shaft bore 885 will have an inner bore diameter of approximately about 5 to about 10 mm. The outer diameter of thecylindrical shaft 850 may be configured to be slightly smaller than the inner bore diameter of thecylindrical body 100 illustrated inFIG. 6 . This slightly smaller outer diameter is sized in order to take into account the thickness of the tubular wall of the tubular members that are positioned between the outer surface of thecylindrical body 100 and the outer surface of thecylindrical shaft 850. - Each of the first shaft bore and the second bore shaft will have an inner bore diameter of approximately about 5 to about 10 mm. In one arrangement, the inner bore diameter of the first bore shaft and the second bore shaft are substantially equivalent. As will be explained in greater detail herein, these inner bores function to engage the wheels. Specifically, the
first bore 865 is configured to engage thefirst wheel 900 a and thesecond bore 885 is configured to engage thesecond wheel 900 b. More specifically, thefirst bore 865 is configured to removably engage awheel stem 920 of thefirst wheel 900 a and thesecond bore 885 is configured to engage awheel stem 930 of thesecond wheel 900 b. In one preferred arrangement, these wheel stem and cylindrical shaft engagements occur by way of a threaded engagement. However, as those of ordinary skill in the art will recognize, alternative engagement methods may also be utilized. - In one preferred arrangement, the
cylindrical shaft 850 may comprise a length that is substantially equivalent to the length of thecylindrical body 100. In one preferred arrangement, thecylindrical shaft 850 may comprise a main body length that is slightly longer than the length of thecylindrical body 100. This slightly longer length of the main body of thecylindrical shaft 850 takes into account the size of the firsttubular member 300 a that is seated near the first end of thecylindrical shaft 850 and the size of the secondtubular member 300 b seated within the second end of thecylindrical shaft 850. In one arrangement, thecylindrical shaft 850 comprises a length of approximately 65 to about 75 mm. - As illustrated, the sharpening
apparatus 700 further comprises a firstcircular disk 800 a and a secondcircular disk 800 b. - As illustrated, the first
circular disk 800 a further comprises aconcave cutout 810 that is provided along a radially extending portion of the disk of the firstcircular disk 800 a Preferably, thisconcave cutout 810 is machined along an outer surface of this radially extending portion of the firstcircular disk 800 a. Thisconcave cutout 810 extends along the entire circumference of the firstcircular disk 800 a. - This
concave cutout 810 is configured to operatively engage an elastic member, such as theelastic ring 600 illustrated inFIG. 11 . When operatively engaged with thiscutout 460, theelastic member 600 will allow the first andsecond wheels 900 a,b to rotate simultaneously. In an arrangement, an outer diameter of the cylindrical body 100 (FIG. 6 ) is substantially equivalent to an outer diameter of the firstcircular disk 800 a. For example, this outer diameter of the firstcircular disk 800 a may be approximately 50 to about mm. Theelastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged thiscutout 810. For example, theelastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/orsecond wheels 900 a, b. - In an arrangement, the
second surface 822 of the firstcircular disk 800 a comprises arecess 824 that is milled along thesecond surface 822. Such arecess 470 may comprise a circular recess. For example, thecircular recess 824 milled along thesecond surface 822 of the firstcircular disk 800 a may comprise a first recess diameter. As an example, this first recess diameter may have a diameter of approximately 25 to about 35 mm. With such a recess configuration, when the sharpeningapparatus 700 is assembled for use as illustrated inFIG. 12 , the firsttubular member 300 a residing in between thefirst shaft end 860 and the firstcylinder body end 110 comprises a flange 310 a having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first recess diameter. - The second
circular disk 800 b is substantially similar in construction as to the firstcircular disk 800 a. For example, the secondcircular disk 800 b further comprises aconcave cutout 820 that is provided along a radially extending portion of the disk of the secondcircular disk 800 b. Preferably, thisconcave cutout 820 is machined along an outer surface of this radially extending portion of the secondcircular disk 800 b. Thisconcave cutout 820 extends along the entire circumference of the secondcircular disk 800 b. - This
concave cutout 820 is configured to operatively engage an elastic member, such as theelastic ring 600 illustrated inFIG. 11 . When operatively engaged with thiscutout 820, theelastic member 600 will allow the first and second wheels to rotate simultaneously. In an arrangement, an outer diameter of the cylindrical body 100 (FIG. 6 ) is substantially equivalent to an outer diameter of the secondcircular disk 800 b. For example, this outer diameter of the firstcircular disk 800 a may be approximately 50 to about 60 mm. Theelastic member 600 is sized so that it must be slightly stretched in order to releasably and fixedly engaged thiscutout 460. For example, theelastic member 600 may have an outer diameter of approximately 45 to about 55 mm, depending on the outer diameter of the first and/orsecond wheel - In an arrangement, the
second surface 832 of the secondcircular disk 800 b comprises arecess 834 that is milled along thesecond surface 832. Such arecess 834 may comprise a circular recess. For example, thecircular recess 834 milled along thesecond surface 832 of the secondcircular disk 800 b may comprise a first recess diameter. As an example, this first recess diameter may have a diameter of approximately 25 to about 35 mm. With such a recess configuration, when the sharpeningapparatus 700 is assembled for use as illustrated inFIG. 12 , the firsttubular member 300 a residing in between thefirst shaft end 860 and the firstcylinder body end 110 comprises a flange 310 a having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first flange diameter. - With the sharpening
apparatus 700 in an assembled state as illustrated inFIG. 12 , the firsttubular member 300 a will be seated over an end of thecylindrical shaft 850 and thereby positioned between thecylindrical shaft 850 and thecylindrical body 100. In this position, the radially extending flange 330 a of the firsttubular member 300 a will reside between thecylindrical body 850 and the firstcircular disk 800 a. Specifically, the radially extending flange 330 a will be seated within a recess defined along thesecond surface 822 of the firstcircular disk 800 a and thecylindrical body 100. - With the sharpening
apparatus 700 in an assembled state as illustrated inFIG. 12 , the secondtubular member 300 b will be seated over an end of thecylindrical shaft 850 and thereby positioned between thecylindrical shaft 850 and thecylindrical body 100 in a similar manner. In this position, the radially extending flange 330 b of the secondtubular member 300 a will reside between thecylindrical body 850 and the secondcircular disk 800 b. Specifically, the radially extending flange 330 b will be seated within a recess defined along thesecond surface 832 of the secondcircular disk 800 b and thecylindrical body 100. - Wheels
- As illustrated in
FIG. 12 , the sharpeningapparatus 700 further comprises afirst wheel 900 a and asecond wheel 900 b. In one arrangement, the first andsecond wheels 900 a, b comprise a substantially similar material. For example, such a material may comprise stainless steel. Other material may also be used, such as Aluminum, Copper, Steel, Brass, Titanium, Sterling Silver, Bronze, etc. And hard plastics and other materials: Nylon, Acetal, Polycarbonate, Polystyrene, Acrylic, Fiberglass, Carbon fiber, PTFE, ABS, and PVC. - In an arrangement, both
wheels 900 a, b comprise a corrosion-resistant stainless steel. For example,wheels 900 a, b may be made of stainless steel are low-wear and can generally be manufactured with high precision and low manufacturing tolerances. - The overall size and geometrical configuration of the
first wheel 900 a may be substantially similar to the size of thesecond wheel 900 b. For example, the outer diameter, the thickness, and the geometrical shape of thefirst wheel 900 a, and the wheel stem may be substantially similar to thesecond wheel 900 b. As just one example, the size of thefirst wheel 900 a may be approximately about 50 to about 60 mm in diameter. Similarly, the size of thesecond wheel 900 b may be approximately about 50 to about 60 mm in diameter. - In one arrangement, the
first wheel 900 a comprises a substantially circular disk comprising a first orouter surface 905 a. The circular disk further comprises a second or inner surface 907 a. In this illustrated embodiment, thefirst wheel 900 a further comprises afirst wheel stem 920 that extends in a vertical direction away from the second surface 907 a. Thisfirst stem 920 is configured to engage the first shaft bore defined by thecylindrical shaft 850. In a preferred arrangement, thefirst surface 905 a of thefirst wheel 900 a comprises a spiral 940. - In an arrangement, the
second wheel 900 b is generally similar in construction to thefirst wheel 900 a. As illustrated, similar to thefirst wheel 900 a, thesecond wheel 900 b comprises a substantially circular disk comprising a first surface or outer surface. The circular disk further comprises a second surface or inner surface. In this illustrated embodiment, thesecond wheel 900 b comprises asecond wheel stem 920 that extends in a vertical direction away from the first surface 905. Thissecond wheel stem 920 is configured to engage the second shaft bore defined by thecylindrical shaft 850. - In a preferred arrangement, the
first surface 905 b of thesecond wheel 900 b comprises an abrasive diamond coated layer as described herein. For example, the diamond coated layer may comprise at least a grit size of D91. Other grit sizes may also be used. - As configured in the sharpening
apparatus 700 as assembled, thefirst wheel 900 a rotates simultaneously with thesecond wheel 900 b as a user rotates the sharpeningapparatus 700 over a surface. For example, to rotate the bothwheels 900 a,b of the sharpeningapparatus 700, a user places his or her hand on thecylindrical body 100. As the user handles thecylindrical body 100 and rolls theapparatus 700 along a surface, theelastic members 600 a, b will frictionally engage the surface and this engagement will allow the first and second wheels to rotate. And since both thefirst wheel 900 a and thesecond wheel 900 b are operatively coupled to thecylindrical shaft 850, both thefirst wheel 900 a and thesecond wheel 900 b operate simultaneously as thecylindrical shaft 850 also rotates. And then both thecylindrical shaft 850, thefirst wheel 900 a, the first disk 800, thesecond wheel 900 b, and thesecond disk 800 b rotate in unison. - Magnet Gauge
-
FIGS. 14A-B andFIG. 15A illustrate perspective views of aknife holder 1000 for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIGS. 1-5 .FIG. 15D illustrates a cross sectional view of aknife holder 1000 for use with a sharpening apparatus, such as the sharpening apparatus illustrated inFIGS. 1-5 . Figure is a top view of aknife holder 100 in accordance with disclosed embodiments. As illustrated, theknife holder 1000 may comprise various materials. In one preferred arrangement, the knife holder comprises a material of Beech Wood colored and may have the following approximate dimensions 87×58×25 mm. - As illustrated, the
knife holder 1000 is used to hold a cutting tool (e.g., knife) to be ground or polished by means of magnetic force. In addition, theknife holder 1000 is used to properly position the blade of a roller grinder. - As illustrated, the
knife holder 1000 comprises amain body 1010 and thismain body 1010 is made of solid wood. Themain body 1010 is configured with two ends, afirst end 1020 and asecond end 1030. At both the first and second ends define two different angular inclinations. These different angular inclinations represent the respective need of the knife to be sharpened. In one arrangement, the firstangular inclination 1040 defines a 15 degree angle is used for sharpening western shaped knives, such as the European chefs knife. In one arrangement, the secondangular inclination 1050 defines a 20 degree angle is usually used for steeper ground blades, often Japanese blades. Depending on whether the base grind of a knife is thin or wider, either the 15 degree or 20 degree angle is used. The goal is to ensure the optimum sharpening angle for the particular knife. - In one preferred arrangement, two
neodymium magnets 1060 a,b are glued or otherwise fastened into the wood on each side of themain body 1010 of theknife holder 1000. A recess for each of these magnets may be drilled by milling. These twomagnets 1060 a,b allow the blades to be held securely in the respective position for the grinding process. - When grinding the blades, material is removed from the blade steel and thus fine steel dust is produced. To prevent this from adhering openly to the wood or the magnets,
hard plastic pads 1050 are glued or otherwise fastened to both sides. - The description of the different advantageous embodiments has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments in the form disclosed. Modifications and variations will be apparent to those of ordinary skill in the art. Further, different advantageous embodiments may provide different advantages as compared to other advantageous embodiments. The embodiment or embodiments selected are chosen and described in order to best explain the principles of the embodiments, the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (20)
1. A sharpening apparatus comprising:
a cylindrical body having a first cylindrical body end and a second cylindrical body end, the cylindrical body defining a bore extending from the first cylindrical body end to the second cylindrical body end;
a cylindrical shaft having a first shaft end and a shaft second, the first shaft end defining a first shaft bore and the second shaft end side defining a second end bore;
a first tubular member residing adjacent the first shaft end and the first cylinder body side;
a second tubular bearing residing adjacent the second shaft end and the second cylinder body side;
a first wheel comprising a first wheel stem, wherein the first wheel stem engages the first shaft bore defined by the cylindrical shaft; and
a second wheel comprising a second wheel stem, wherein the second wheel stem engages the second shaft bore defined by the cylindrical shaft and wherein the second wheel comprises a first surface defining a spiral raceway along an outer surface of the second wheel.
2. The sharpening apparatus of claim 1 wherein the cylindrical body comprises a beech wood, walnut wood, or oak wood treated surface.
3. The sharpening apparatus of claim 1 wherein the first shaft bore comprises at least one beveled edge.
4. The sharpening apparatus of claim 1 , wherein the bore extending from the first cylindrical body end to the second cylindrical body end comprises a central bore.
5. The sharpening apparatus of claim 1 , wherein the cylindrical body includes a bore comprising a unitary diameter.
6. The sharpening apparatus of claim 1 , wherein the cylindrical shaft comprises a stainless-steel shaft.
7. The sharpening apparatus of claim 1 wherein an outer diameter of the cylindrical body is substantially equivalent to an outer diameter of the first wheel.
8. The sharpening apparatus of claim 1 wherein the first shaft bore extends only along a portion of a length of the cylindrical shaft
9. The sharpening apparatus of claim 1 wherein the first wheel comprises a first surface, this first surface comprising an abrasive diamond coated layer.
10. The sharpening apparatus of claim 9 wherein the diamond layer comprises at least a grit size of D91.
11. The sharpening apparatus of claim 1 wherein the first wheel comprises stainless steel.
12. The sharpening apparatus of claim 1 wherein the first wheel rotates simultaneously with the second wheel.
13. The sharpening apparatus of claim 1 wherein the first wheel comprises a concave cutout along a radially extending portion of the first wheel.
14. The sharpening apparatus of claim 13 further comprising an elastic member placed within the concave cutout.
15. The sharpening apparatus of claim 1 wherein the spiral raceway is milled into the second surface of the second wheel at approximately a 90-degree angle.
16. The sharpening apparatus of claim 1 wherein the first wheel comprises a second surface wherein a circular recess is milled along the second surface of the first wheel.
17. The sharpening apparatus of claim 16 wherein the circular recess milled along the second surface of the first wheel comprises a first recess diameter.
18. The sharpening apparatus of claim 17 where the first tubular member residing between the first shaft end and the first cylinder body end comprises a flange having a first flange diameter;
wherein the first recess diameter is substantially equivalent to the first flange diameter.
19. The sharpening apparatus of claim 1 , wherein the first wheel stem removably engages the first shaft bore defined by the cylindrical shaft.
20. The sharpening apparatus of claim 1 , wherein the removable engagement of the first wheel stem and the first shaft bore is a threaded engagement.
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US18/199,544 US20230405767A1 (en) | 2022-05-26 | 2023-05-19 | Sharpening apparatus |
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US202263346308P | 2022-05-26 | 2022-05-26 | |
US18/199,544 US20230405767A1 (en) | 2022-05-26 | 2023-05-19 | Sharpening apparatus |
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US20230405767A1 true US20230405767A1 (en) | 2023-12-21 |
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