SHARPENING APPARATUS

FIELD OF THE DISCLOSURE

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.

BACKGROUND

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.

SUMMARY

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.

BRIEF DESCRIPTION OF THE 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:

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. 3 illustrates another perspective view of the sharpening apparatus illustrated in FIG. 1;

FIG. 4 illustrates a cross-sectional 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;

FIG. 6 illustrates a cylindrical body for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 1;

FIGS. 7A-C illustrate components of a cylindrical shaft for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 1;

FIG. 8 illustrates a tubular member for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 1;

FIGS. 9A-C illustrate various views of a first wheel for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 1;

FIGS. 10A-D illustrate various views of a second wheel for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 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 in FIG. 1;

FIG. 12 illustrates a cross-sectional view of an alternative arrangement for the sharpening apparatus illustrated in FIG. 1;

FIG. 13 illustrates a cylindrical shaft for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 12;

FIGS. 14A-B illustrate perspective views of mounting block that may be used with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 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.

DETAILED DESCRIPTION

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.

FIGS. 2 and 3 illustrate perspective views of a sharpening apparatus 10 according to an exemplary arrangement. Such a sharpening apparatus 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 sharpening apparatus 10 relates to a device that can be manually manipulated or rolled along a surface. Two sharpening or polishing circular wheels or discs 400, 500 are rotatably attached and held at each grip end. One of the wheels 400 may be used for sharpening whereas the second wheel 500 may be used as a finishing step for polishing or refining the sharpened blade.

With such a sharpening apparatus 10, each wheel or disc 400, 500 is configured to rotate or roll on a surface and rotate with respect to the cylindrical body or handle 100. Rotation of both wheels 400, 500 and therefore blade sharpening occurs when the user places this roller grinder on a generally planar surface and grips the 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 the rotating wheels 400, 500 can therefore rotatably engage and therefore grind or sharpen the blade at the proper angle. As just one example, the cutting implement to be sharpened may be held in a mounting block, such as the mounting block illustrated in FIGS. 14 and 15.

As noted, 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. In one arrangement, 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. At the other end of the axis 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. After the knife to be sharpened is clamped in position with respect to the flat surface, the sharpening device 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 400, 500 will rotate simultaneously and will also rotate relative to the 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 a mounting block 1000 for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 1. According to one arrangement, this mounting 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 sharpening apparatus 10 of FIGS. 2-3. As illustrated, the sharpening apparatus 10 comprises a cylindrical body 100, a cylindrical shaft 200, a first tubular element 300a, a second tubular element 300b, a first wheel 400, and a second wheel 500. As illustrated, both the first wheel 400 and the second wheel 500 are configured to receive an elastic member 600a,b. FIG. 2 illustrates another perspective view of the sharpening apparatus 10 illustrating the first wheel 400. And FIG. 3 illustrates another perspective view of the sharpening apparatus 10 illustrating the second wheel 500. FIG. 4 illustrates another cross-sectional view of the sharpening apparatus 10 and FIG. 5 illustrates an exploded view of the sharpening apparatus 10.

Referring now to FIGS. 1-5, the sharpening apparatus 10 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 200 that extends from a first shaft end 210 to a second shaft end 220. The first shaft 300 at end 210 of the cylindrical shaft 200 defines a first shaft bore 230 and the second shaft end 220 defines a second end bore 240.

As illustrated, the sharpening apparatus 10 further comprises a first tubular member 300a. This first tubular member 300a is positioned adjacent the first shaft end 110 and the first cylinder body side. In addition, a second tubular member 300b is positioned adjacent the second shaft end 120 and the second cylinder body side. The sharpening apparatus 10 further comprises a first wheel 400 comprising a first wheel stem 420. The first wheel stem 420 is configured to engage the first shaft bore defined by the cylindrical shaft 200. The sharpening apparatus 10 further comprises a second wheel 500 comprising a second wheel stem 520. The second wheel stem 520 is configured to engage the second shaft bore defined by the cylindrical shaft 200. As indicated, embodiments of the sharpening apparatus may use threaded engagement between wheel stems 420, 520 and the shaft bore of cylindrical shaft 200. Among other things, threaded engagement allows for a more secure, yet still removable, attachment of the wheels 400, 500. Other advantages also exist.

FIG. 6 illustrates a perspective view of a cylindrical body 100 for use with a sharpening apparatus, such as the sharpening apparatus 10 illustrated in FIG. 1. As illustrated, the sharpening apparatus 10 comprises a cylindrical body 100 having a body that extends from a first cylindrical body end 110 to a second cylindrical body end 120. The cylindrical body 100 comprises an outer surface 102 and this cylindrical body 100 defines an inner bore or cavity 130. In one arrangement, this inner bore 130 extends from the first cylindrical body end 110 to the second cylindrical body end 120 and comprises a bore that is centrally located within the cylindrical body 100. In one arrangement, the cylindrical 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 the cylindrical 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, the outer surface 140 of the cylindrical 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 the first end 110 and the second 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, 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. As just one example, 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.

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 the cylindrical 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 the cylindrical 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 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.

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 (without rubber ring 600a,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. For example, FIG. 7B illustrates a perspective view, FIG. 7A illustrates a cross-sectional view, and FIG. 7C 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 elongated shaft comprises a main body 205 that extends from a first shaft end 210 to a second shaft end 220. In one preferred arrangement, both the first shaft end 210 and the second shaft end 220 are substantially smooth and are substantially parallel to one another. As illustrated, the first shaft end 210 of the main body of the cylindrical shaft 200 comprises a first 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 the cylindrical shaft 200. In one preferred arrangement, the first shaft bore 230 does not extend along the entire length of the cylindrical shaft 200. Rather, the first shaft bore 230 only extends along a portion of the length of the cylindrical 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 the cylindrical shaft 200. Rather, the second shaft bore 240 only extends along a portion of the length of the cylindrical 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 the entry point 232 comprises a beveled edge or a chamfered edge 234. For example, this beveled edge 234 may comprise a symmetrical sloping edge. In one arrangement, 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. 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 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).

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 the first wheel 400 and the second bore 240 is configured to engage the second wheel 500. More specifically, 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. 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 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 300a that is seated near the first end 210 of the cylindrical shaft 200 and the size of the second tubular member 300b 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.

For sharpening of a knife edge, a stable and straightforward motion of the rolling sharpener is advantageous. 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 sharpening apparatus 10 further comprises a first tubular member 300a and a second tubular member 300b. In one preferred arrangement, the first tubular member 300a is substantially identical to the second tubular member 300b. For example, FIG. 8 illustrates a perspective view of a tubular member 300 for use with a sharpening apparatus, such as the sharpening apparatus 10 illustrated in FIGS. 1-4. The tubular member 300 may comprise a number of different materials, preferably a material such as a low friction plastic. The tubular member 300 further comprises an outer surface 302 which in one embodiment comprises a smooth outer surface. In one arrangement, the outer surface 302 of the tubular member 300 comprises a matte finish.

The first and second tubular members 300a, b act as a bearing that constrains relative motion to only the desired motion. In addition, the tubular members 300a, b reduce friction between rotating components, including the wheels 400, 500, the cylindrical body 100, and the cylindrical 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 second tubular members 300a, b may be constructed in a similar manner.

As illustrated in FIG. 8, 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. At the first end 310 of the tubular member a collar or radially extending flange 330 is provided. As illustrated, 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).

With the sharpening apparatus 10 in an assembled state as illustrated in FIG. 4, the first tubular member 300a 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 330a of the first tubular member 300a will reside between the cylindrical body 100 and the first wheel 400. Specifically, the radially extending flange 330a will be seated within a recess defined along the second surface 410 of the first wheel 400 and the cylindrical body 100.

Wheels

As illustrated in FIGS. 1-5, the sharpening apparatus further comprises a first wheel 400 and a second wheel 500. FIGS. 9A-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. And FIGS. 10A-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.

In one arrangement, the first and second wheels 400, 500 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 400, 500 comprise a corrosion-resistant stainless steel. For example, wheels 400, 500 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 400 may be substantially similar to the size of the second 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 the second wheel 500. As just one example, the size of the first wheel 400 may be approximately about 50 to about 60 mm in diameter. Similarly, the size of the second wheel 500 may be approximately about 50 to about 60 mm in diameter.

FIG. 9A illustrates a perspective view of a first wheel 400. As illustrated, 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. In this illustrated embodiment, 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.

In a preferred arrangement, the first surface 405 of the first wheel 400 comprises an abrasive diamond coated layer 440 (see FIG. 9C). For example, the diamond coated layer 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 a concave cutout 460 that is provided along a radially extending portion of the disk of the first wheel 400. Preferably, 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.

This concave cutout 460 is configured to operatively engage an elastic member, such as the elastic ring 600 illustrated in FIGS. 11A-B. When operatively engaged with this cutout 460, the elastic 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 first wheel 400. For example, this outer diameter of the first wheel 400 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. For example, 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.

In an arrangement, the second surface 410 of the first wheel 400 comprises a recess 470 that is milled along the second surface 410. Such a recess 470 may comprise a circular recess. For example, the circular recess 470 milled along the second surface 410 of the first 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 sharpening apparatus 10 is assembled for use as illustrated in FIGS. 1-5, the first tubular member 300a residing in between the first shaft end 210 and the first cylinder body end 110 comprises a flange 310a 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 a second wheel 500. In an arrangement, the second wheel 500 is generally similar in construction to the first wheel 400. As illustrated, similar 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. In this illustrated embodiment, 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.

In a preferred arrangement, 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. 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, 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.

As illustrated, 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. Preferably, 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. 11A-B. When operatively engaged with this cutout 560, the elastic 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 second wheel 500. For example, 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. For example, 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.

In an arrangement, the second surface 510 of the second wheel 500 comprises a recess 570 that is milled along the second surface 510. Such a recess 570 may comprise a circular recess. For example, the circular recess 570 milled along the second surface 510 of the second 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 sharpening apparatus 10 is assembled for use as illustrated in FIGS. 1-5, the second tubular member 300b residing in between the second shaft end 220 and the second cylinder body end 120 comprises a flange 310b 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, the first wheel 400 rotates simultaneously with the second wheel 500 as a user rotates the sharpening apparatus 10 over a surface. For example, to rotate both first and second wheels 400, 500 of the sharpening apparatus 10, a user places his or her hand on the cylindrical body 100. As the user handles the cylindrical body 100 and rolls the apparatus 10 along a surface, the elastic members 600a, b will frictionally engage the surface and this engagement will allow the first and second wheels to rotate. And since 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.

As illustrated in FIG. 4, there is a distance D between the first end 110 of the cylindrical body 100 and the first or inner surface 410 of the first wheel 400 so that a sufficient amount of play or distance is created such that between the cylindrical body 100 and the two grinding wheels 400, 500 to ensure that the grinding wheels rotate relative to the cylinder body. In one preferred arrangement, this distance D should be as small as possible to prevent the penetration of dirt or moisture from the use in the kitchen.

The two outer surfaces of the wheels 400, 500 are used to restore a sharp cutting edge. To achieve an optimum result, both grinding wheels 400, 500 have different functions. As described herein, 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.

After the rough pre-grinding with diamond layer 440, an outer surface 505 of the second wheel 500 is applied in the same process. This surface is made of stainless steel and has a spiral grained raceway 540. In one arrangement, this spiral-grained raceway 540 is milled into the surface at a 90% angle. This pattern 540 allows the already pre-sharpened cutting edge to be honed even more effectively. When rolling, the spiral 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 400, 500 are connected to 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 and second wheels 400, 500 can move or rotate together, so that it causes a stable straight running of the sharpening apparatus 10 and a tilting of the wheels 400, 500 is avoided.

FIG. 12 illustrates a perspective view of an alternative arrangement of a sharpening apparatus 700. As illustrated, the sharpening apparatus 700 comprises a cylindrical body 100, a cylindrical shaft 850, a first tubular element 300a, a second tubular element 300b, a first circular disk 800a, a first wheel 900a, a second circular disk 800b, and a second wheel 900b. As illustrated, both the first circular disk 800a and the second circular disk 800b are configured to receive the elastic members 600a, b, respectively. The cylindrical body 10, the cylindrical shaft 200, the first tubular element 300a, the second tubular element 300b, and the elastic members 600a, b illustrated in FIG. 12 are substantially similar to those same items as illustrated in FIGS. 1-5.

Referring now to FIG. 12, 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.

As illustrated, the sharpening apparatus 700 further comprises a first tubular member 300a. This first tubular member 300a is positioned adjacent the first shaft end and the first cylinder body side. In addition, a second tubular member 300b is positioned adjacent the second shaft end and the second cylinder body end. The sharpening apparatus 700 further comprises a first wheel 900a 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 900b 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.

As illustrated, the sharpening apparatus 700 further comprises a first circular disk 800a and a second circular disk 800b. In one arrangement, the first circulate disk 800a is positioned between the first wheel 900a and the first end of the cylindrical body 100. In this configuration, the stem 920 of the first wheel 900a is configured to extend through an aperture defined by the first circular disk 800a. Similarly, in this configuration, the stem 930 of the second wheel 900b is configured to extend through an aperture defined by the second circular disk 800b.

The sharpening apparatus 700 further comprises a cylindrical shaft 850, preferably a tubular elongated shaft. For example, FIG. 13 illustrates a perspective view of a cylindrical shaft 850 for use with a sharpening apparatus, such as the sharpening apparatus illustrated in FIG. 12.

The elongated shaft 850 comprises a main 852 body that extends from a first shaft end 860 to a second shaft end 880. In one preferred arrangement, both the first shaft end 860 and the second shaft end 880 are substantially smooth and are substantially parallel to one another. As illustrated, the first shaft end 860 of the main body of the cylindrical shaft 850 comprises a first 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 the cylindrical shaft 850. In one preferred arrangement, the first shaft bore 865 does not extend along the entire length of the cylindrical shaft 850. Rather, the first shaft bore 865 only extends along a portion of the length of the cylindrical 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 the cylindrical shaft 850. Rather, the second shaft bore 885 only extends along a portion of the length of the cylindrical 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, the second bore 885 of the cylindrical shaft 850 residing at the second end of the cylindrical shaft 850 is similarly configured as the first shaft bore 865. That is, the second bore 885 extends along a portion of the length of the cylindrical 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 the cylindrical shaft 850 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 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 the first wheel 900a and the second bore 885 is configured to engage the second wheel 900b. More specifically, the first bore 865 is configured to removably engage a wheel stem 920 of the first wheel 900a and the second bore 885 is configured to engage a wheel stem 930 of the second wheel 900b. 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 the cylindrical body 100. In one preferred arrangement, 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 300a that is seated near the first end of the cylindrical shaft 850 and the size of the second tubular member 300b seated within the second end of the cylindrical shaft 850. In one arrangement, the cylindrical shaft 850 comprises a length of approximately 65 to about 75 mm.

As illustrated, the sharpening apparatus 700 further comprises a first circular disk 800a and a second circular disk 800b.

As illustrated, the first circular disk 800a further comprises a concave cutout 810 that is provided along a radially extending portion of the disk of the first circular disk 800a Preferably, this concave cutout 810 is machined along an outer surface of this radially extending portion of the first circular disk 800a. This concave cutout 810 extends along the entire circumference of the first circular disk 800a.

This concave cutout 810 is configured to operatively engage an elastic member, such as the elastic ring 600 illustrated in FIG. 11. When operatively engaged with this cutout 460, the elastic member 600 will allow the first and second wheels 900a,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 first circular disk 800a. For example, this outer diameter of the first circular disk 800a 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. For example, 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 900a, b.

In an arrangement, the second surface 822 of the first circular disk 800a comprises a recess 824 that is milled along the second surface 822. Such a recess 470 may comprise a circular recess. For example, the circular recess 824 milled along the second surface 822 of the first circular disk 800a 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 sharpening apparatus 700 is assembled for use as illustrated in FIG. 12, the first tubular member 300a residing in between the first shaft end 860 and the first cylinder body end 110 comprises a flange 310a having a first flange diameter, wherein the first recess diameter is substantially equivalent to the first recess diameter.

The second circular disk 800b is substantially similar in construction as to the first circular disk 800a. For example, the second circular disk 800b further comprises a concave cutout 820 that is provided along a radially extending portion of the disk of the second circular disk 800b. Preferably, this concave cutout 820 is machined along an outer surface of this radially extending portion of the second circular disk 800b. This concave cutout 820 extends along the entire circumference of the second circular disk 800b.

This concave cutout 820 is configured to operatively engage an elastic member, such as the elastic ring 600 illustrated in FIG. 11. When operatively engaged with this cutout 820, the elastic 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 second circular disk 800b. For example, this outer diameter of the first circular disk 800a 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. For example, 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.

In an arrangement, the second surface 832 of the second circular disk 800b comprises a recess 834 that is milled along the second surface 832. Such a recess 834 may comprise a circular recess. For example, the circular recess 834 milled along the second surface 832 of the second circular disk 800b 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 sharpening apparatus 700 is assembled for use as illustrated in FIG. 12, the first tubular member 300a residing in between the first shaft end 860 and the first cylinder body end 110 comprises a flange 310a 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 in FIG. 12, the first tubular member 300a 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 330a of the first tubular member 300a will reside between the cylindrical body 850 and the first circular disk 800a. Specifically, the radially extending flange 330a will be seated within a recess defined along the second surface 822 of the first circular disk 800a and the cylindrical body 100.

With the sharpening apparatus 700 in an assembled state as illustrated in FIG. 12, the second tubular member 300b 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 330b of the second tubular member 300a will reside between the cylindrical body 850 and the second circular disk 800b. Specifically, the radially extending flange 330b will be seated within a recess defined along the second surface 832 of the second circular disk 800b and the cylindrical body 100.

Wheels

As illustrated in FIG. 12, the sharpening apparatus 700 further comprises a first wheel 900a and a second wheel 900b. In one arrangement, the first and second wheels 900a, 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 900a, b comprise a corrosion-resistant stainless steel. For example, wheels 900a, 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 900a may be substantially similar to the size of the second wheel 900b. For example, the outer diameter, the thickness, and the geometrical shape of the first wheel 900a, and the wheel stem may be substantially similar to the second wheel 900b. As just one example, the size of the first wheel 900a may be approximately about 50 to about 60 mm in diameter. Similarly, the size of the second wheel 900b may be approximately about 50 to about 60 mm in diameter.

In one arrangement, the first wheel 900a comprises a substantially circular disk comprising a first or outer surface 905a. The circular disk further comprises a second or inner surface 907a. In this illustrated embodiment, the first wheel 900a further comprises a first wheel stem 920 that extends in a vertical direction away from the second surface 907a. This first stem 920 is configured to engage the first shaft bore defined by the cylindrical shaft 850. In a preferred arrangement, the first surface 905a of the first wheel 900a comprises a spiral 940.

In an arrangement, the second wheel 900b is generally similar in construction to the first wheel 900a. As illustrated, similar to the first wheel 900a, the second wheel 900b 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, the second wheel 900b 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.

In a preferred arrangement, the first surface 905b of the second wheel 900b 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, the first wheel 900a rotates simultaneously with the second wheel 900b as a user rotates the sharpening apparatus 700 over a surface. For example, to rotate the both wheels 900a,b of the sharpening apparatus 700, a user places his or her hand on the cylindrical body 100. As the user handles the cylindrical body 100 and rolls the apparatus 700 along a surface, the elastic members 600a, b will frictionally engage the surface and this engagement will allow the first and second wheels to rotate. And since both the first wheel 900a and the second wheel 900b are operatively coupled to the cylindrical shaft 850, both the first wheel 900a and the second wheel 900b operate simultaneously as the cylindrical shaft 850 also rotates. And then both the cylindrical shaft 850, the first wheel 900a, the first disk 800, the second wheel 900b, and the second disk 800b rotate in unison.

Magnet Gauge

FIGS. 14A-B and FIG. 15A 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. 15D 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. As illustrated, the knife 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, the knife holder 1000 is used to properly position the blade of a roller grinder.

As illustrated, 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. In one arrangement, the first angular inclination 1040 defines a 15 degree angle is used for sharpening western shaped knives, such as the European chefs knife. In one arrangement, 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.

In one preferred arrangement, two neodymium magnets 1060a,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 1060a,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.

SHARPENING APPARATUS

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CPC

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CROSS-REFERENCE TO RELATED APPLICATIONS

Provisional Applications (1)