CA2331369A1 - Sharpenable edge sharpening equipment - Google Patents
Sharpenable edge sharpening equipment Download PDFInfo
- Publication number
- CA2331369A1 CA2331369A1 CA002331369A CA2331369A CA2331369A1 CA 2331369 A1 CA2331369 A1 CA 2331369A1 CA 002331369 A CA002331369 A CA 002331369A CA 2331369 A CA2331369 A CA 2331369A CA 2331369 A1 CA2331369 A1 CA 2331369A1
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- Prior art keywords
- sharpening
- item
- gripping means
- equipment
- angle
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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
-
- 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
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
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Abstract
Sharpening equipment in the form of sharpening device (10) comprises jaw fashion arranged gripping means (12) for gripping an item such as a knife (50) of which the blade requires sharpening, a sharpening means carrier in the form of a sharpening element holding base (14) releasably holding a sharpening stone (16), a guiding layout in the form of a guiding rod (18) mounted to reciprocate along an adjustably mounted support guide (20) in parallel with the sharpening surface (16.1) and an angle adjustment facility as provided by a connecting arm (24). The arm (24) extends integrally with respect to the gripping means (12) and is swivellably connected to the leading end of the rod (18). A disc (26) as mounted about the swivelling position presents a graduated dial providing face (28). The gripping means (12) is arranged to cause its central axis (46) to pass through the pivotal point (48) between the gripping means (12) and the rod (18).
Description
(1 ) TITLE OF THE INVENTION
Sharpenable edge sharpening equipment (2) CROSS REFERENCED APPLICATIONS
to US 278 237 Is (3) BACKGROUND TO THE INVENTION
In sharpening the blade of a knife or other similar equipment the acuteness of the sharpening angle often requires precision work. To achieve this the sharpening edge must be maintained at the same sharpening angle during the pertormance of a sharpening action.
2o As the sharpening angle varies between equipment such as between knives or scissors chisels etc the correct sharpening angle must be selected prior to sharpening such equipment. The object of this invention is thus to provide a device that can maintain the selected sharpening angle throughout a sharpening session while enable selection of the desired sharpening angle prior to commencing with a sharpening action.
(4) FIELD OF THE INVENTION
This invention relates to sharpening equipment for sharpening a sharpenable edge of appropriate items and to a sharpening set assemblable into the sharpening equipment.
(5) PRIOR ART DESCRIPTION
Knife sharpening devices are known in the art. According to one arrangement a sharpening stone is recirpocable mounted by way of a rod to be mowed over the edge of an article desired to be sharpened. To accommodate various sharpening angles the device provides a number of reciprocating apertures spaced in series along a formation. The rod is fitted along the aperture that results in the sharpening angle nearest to that required.
(US 4 512 112) (fi) SUMMARY OF THE INVENTION
to According to the invention there is provided sharpening equipment for sharpening a sharpenable edge of appropriate items such as knives, scissors, chisels or the like.
(7) BRIEF DESCRIPTION OF THE DRAWING
The invention is hereafter described, by way of example, with reference to the accompanying drawings. In the drawings Figure 1 shows sharpening equipment in the form of a sharpening device for sharpening a 2o sharpenable edge as found on an appropriate item such as a knife, scissors, a plane cutter or the like, in side elevation as set for sharpening an item of which the sharpenable edge is steeply bevelled, as in the case of the blade of a knife, Figure 2 shows the device as set according to figure 1, in plan view, Figure 3 shows the device as set for sharpening an item with a less steeply bevelled sharpenable edge such as a pair of scissors, in side elevation, Figure 4 shows the device as adapted into clamping fashion holding an appropriate item 3o such as a chisel, in side elevation, WO 99/56915 ~ PCT/ZA99/00031 Figure 5 shows the device as readjusted into sharpening a serratedly or like edged item such as a knife with a serrated cutting edge, in side elevation, Figure 6 shows in detail the gripping means of the device as incorporating the angle adjustment facility, Figure 7 shows the device along the view A-A in figures 1, 3 and 4, Figure 8 shows the base of the device as fitted with upstanding sharpening stones after m removal of the guiding layout and the gripping means, and Figure 9 shows a conventional serrated edge sharpening element used when the device is readjusted according to figure 5.
1s (8) DETAILED DESCRIPTION OF THE DRAWINGS
Referring to figures 1 to 5 of the drawings, sharpening equipment in the form of sharpening device, is generally indicated by reference numeral 10.
2o The device 10 comprises gripping means generally indicated by reference numeral 12, a sharpening means carrier in the form of sharpening element holder as provided by a sharpening element holding base 14 releasably holding a sharpening element in the form of a sharpening stone 16, a guiding layout arranged to perform a sharpening session at a constant sharpening angle in the form of a guiding arm as provided by a guiding rod 18 2s mounted to reciprocate along an aperture in an adjustably mounted support guide 20 in parallel with the sharpening surface 16.1 of the sharpening stone 16 in response to retaining equal corresponding inner angles 22, and an angle adjustment facility in the form of a swivelling mechanism forming the connection between the rod 18 and the gripping means 12 as provided by an connecting arm 24 extending integrally with respect to the gripping 3c> means 12 and being swivellably connected to the leading end of the rod 18 via a disc 26 WO 99/56915 . PCT/ZA99/00031 fitted to the rod 18 via a socket 27 with the disc presenting a graduated dial providing face 28 against which the leading end of the arm 24 sweeps dial fashion.
Referring to figures 1 to 3 and also to figure 5 the gripping means 12 is provided a jaw s fashion assembly 30 comprising an upper jaw 32 extending into the arm 24 and a lower jaw 34. An item of which the cutting edge requires sharpening is gripping fashion receivable in the pinching zone 36 defined between the jaws 32, 34. Such item is securely so held in response the tightening of a tightenable element 40 engaging screw fashion between the jaws 32, 34. To enhance the gripping effect an adjustment element 42 situated towards the to rear ends of the jaws 32, 34 engages screw fashion with the jaw 32 while urging with its inner end against the inner wall of the jaw 34 as suitably recessed to limit relative adjacent movement of the jaws 32, 34. The jaws are retained apart even if not holding an item by means of a spring 44 fitted onto the element 40 between the jaws 32, 34. The assembly 30 is arranged to cause its central axis 46 to pass through the pivotal point 48 between the Is gripping means and the rod 18 in response to the suitable formation of the connecting arm 24. Once an item is thus pinched in the zone 36 the axis 46 passes along its cutting edge.
Referring particularly to figures 1 and 2 a knife 50 is normally held at a relatively small inner angle 22 to result in the one face 50.1 of its leading edge 50.2 lying flush against the 2o sharpening surface 16.1 as its cutting edge bevelling angle is steep. As more clearly shown in figure 2 the knife 50 is pinched in the pinching zone along its blunt edge 50.3. When the cutting edge bevelling angle is not so steep, as shown in the case of scissors 52 in figure 3, the angles 22 require adjustment, as discussed below, to retain the leading edge face 52.1 requiring sharpening in contact with the sharpening surface 16.1.
In the case where the item of which the sharpenable edge requires sharpening carries a shape that cannot fit the embodiment of the gripping means 12 as discussed in figures 1 to 3 and 5, the gripping means 12 permits adaptation into forming a clamp 54 as shown in figure 4. To achieve this the lower jaw 34 is removed by removal of the elements 40 and 42. The so jaw 32 presents adjacent engaging apertures 56 (as seen in figure 2) engageable by means of wing nuts 58 used for securing a clamp formation 60 to the inner surface of the jaw 32.
The clamp formation 60 is thus used to clamp an appropriate item, such as a chisel 62, to WO 99/56915 _ PCT/ZA99/00031 the gripping means 12 by way of gripping it to the inner surface of the jaw 32. When so clamped its handle 64 extends alongside the disc 26. As the leading portion of the chisel 62 is still located in the zone which defines the pinching zone in the case of the figures 1 to 3 embodiment the chisel 62 will still lie along an axis 66 that passes through the pivotal point 48.
As discussed above in referring to figures 1 to 4, desired sharpening depends on the relevant face of the leading edge of a sharpenable item lying flush against the sharpening surface 16.1. To accommodate a large variety of cutting edge bevels the guiding layout in to conjunction with the swivelling mechanism is thus formed to accommodate an infinite variety of bevels within the range of the device 10. Once the sharpening angle of a cutting edge is established, the appropriate angle is set by pivoting the arm 24 relative to the rod 18 around the pivoting point 48 until the dial as defined by the end of the arm 24 ending appropriately indicating the relevant angle on the face 28. Once this is set the arm 24 is locked to the disc Is 26 by means of a pinching screw 29 pinching fashion holding the arm 24 and disc 26 at their desired setting.
An adjustment from a setting as, for example, shown in figure 1 to that of figure 3 or figure 4 will, however, also require re-setting of the rod 18 to retain a parallel relationship between 2o the rod 18 and the sharpening surface 16.1 for causing the inner angles 22 to be the same for achieving the desired sharpening effect. To this effect the guide 20 is thus adjustably mounted to a support formation in the form of a rail 68 and held in the appropriate position by means of a grub screw 70 releasably locking the guide 20 to the rail 68.
The guide 20 is thus adjusted until the rod 18 again lies parallel to the sharpening surface 16.1, which will 2s cause the angles 22 to be the same again. To promote attainment of the parallel relationship, the device 10 is fitted with a correlator in the form of a linear member as provided by the handle portion 70.1 of the screw 70 which extends in parallel with the sharpening surface 16.1 once the screw 70 is fitted to the guide 20.
so Sharpening is achieved by to-and-fro movement of the sharpenable edge of the appropriate item over the sharpening surface 16.1 in the direction of arrow 72. This is done by manual displacement of the gripping means 12 while urging it to the desired extent against the surface 16.1. It will be appreciated that sharpening is often desired to be carried through by way of uni-directional stroke. To this effect and referring to figure 7 the rod 18 passes with some vertical play along the aperture 74. As lateral movement of a cutting edge over the sharpening surface 16.1 is also often desired the aperture 74 has an oblong horizontal profile thus enabling lateral play of the rod 18 in the aperture 74 as well.
To permit a replacement or turning around of the sharpening stone 16 it fits removably to the base 14. The base 14 makes provision for filmy holding the stone 16 in position once fitted to thereto by means of a seat 75 into which the stone is locked via a locking plate 77 as io secured to the base 14 by means of a wing nut 79. The stone 16 is often required to be replaced during a sharpening action to pass though a procedure requiring stones of different grits.
In use according to the figures 1 to 4 embodiments, an object of which an edge is desired to is be sharpened is thus secured to the gripping means 12, the desired angle selected on the dial and the support guide 20 locked to the rail 68 in a rod 18 to sharpening surtace 16.1 parallel relationship. Sharpening is achieved by desirably sweeping the sharpenable edge over the surface 16.1. Once the one side of the sharpenable edge has been desirably sharpened the gripping means 12 is simply swivelled though 180 degrees owing to the 2o threaded engagement of the rod 18 to the disc 26 and the procedure repeated for the opposite side.
While the embodiments of the invention discussed with reference to figures 1 to 4 are ideal for sharpening a sharpenable edge extending at least substantially linearly, the sharpening 2s of a serrated, scalloped or saw toothed edge requires a separate sharpening action. This can in practise only be effectively achieved by displacement of the sharpening element while the item presenting such edge is retained stationary.
To this effect and referring to figures 5 and 9 the device 10 permits the replacement of the 3o disc 26 and the gripping means 12 by a conventional sharpening element 76 for use in conjunction with not-linear edges, as shown in more detail in figure 9.
Disengagement is achieved by the leading end of the rod 18 fitting screw fashion into the socket 27 fast with WO 99/56915 ~ PCT/ZA99/00031 the disc 26. The sharpening element 76 is fitted with a socket by means of which it engages screw fashion with the rod 18. To bring the item of which the non-linear edge requires sharpening into a sharpening relationship with the element 76 it is again gripped in the pinching zone 36 of the gripping means 12 as now fitted to the bottom end of the rail 68. The s rail 68 is thus releasably secured to the base 14 by being screw fashion received in a threaded socket in the base 14 and so locked by means of a wing nut 80. An indication of the sharpening angle is achieved by the rail 68 presenting graduated markings 82 that indicate the sharpening angle 84 for as long as the gripping means 12 extends transverse to the rail 68. As the rod 18 in this case does not reciprocate transverse to the rail 68, the io guide 20 provides a desiredly shaped aperture 84, as shown in figure 7 in a wing 20.1 which has an oblong shape in the direction of the rail 68 while also permitting lateral play to attend to adjacent serrations or the like.
While specialised sharpening by means of the device 10 is often only required at spaced is intervals, regular touching up is often required when, for example, a knife is used in an ongoing fashion. To this effect and referring to figure 8 the base 14 is fitted with spaced threaded apertures (not shown) into which conventional sharpening stones 86 are receivable after removal of the guiding layout and the gripping means 12.
2o While the invention deals with a device 10 which is constituted from various members the invention also extends to a set constituting the gripping means 12 as fitted with the disc 26, the holding base 14, a sharpening stone 16, the guiding rod 18, the support 20, the rail 68.
The set can also include the sharpening element 76 and the sharpening stones 86.
Sharpenable edge sharpening equipment (2) CROSS REFERENCED APPLICATIONS
to US 278 237 Is (3) BACKGROUND TO THE INVENTION
In sharpening the blade of a knife or other similar equipment the acuteness of the sharpening angle often requires precision work. To achieve this the sharpening edge must be maintained at the same sharpening angle during the pertormance of a sharpening action.
2o As the sharpening angle varies between equipment such as between knives or scissors chisels etc the correct sharpening angle must be selected prior to sharpening such equipment. The object of this invention is thus to provide a device that can maintain the selected sharpening angle throughout a sharpening session while enable selection of the desired sharpening angle prior to commencing with a sharpening action.
(4) FIELD OF THE INVENTION
This invention relates to sharpening equipment for sharpening a sharpenable edge of appropriate items and to a sharpening set assemblable into the sharpening equipment.
(5) PRIOR ART DESCRIPTION
Knife sharpening devices are known in the art. According to one arrangement a sharpening stone is recirpocable mounted by way of a rod to be mowed over the edge of an article desired to be sharpened. To accommodate various sharpening angles the device provides a number of reciprocating apertures spaced in series along a formation. The rod is fitted along the aperture that results in the sharpening angle nearest to that required.
(US 4 512 112) (fi) SUMMARY OF THE INVENTION
to According to the invention there is provided sharpening equipment for sharpening a sharpenable edge of appropriate items such as knives, scissors, chisels or the like.
(7) BRIEF DESCRIPTION OF THE DRAWING
The invention is hereafter described, by way of example, with reference to the accompanying drawings. In the drawings Figure 1 shows sharpening equipment in the form of a sharpening device for sharpening a 2o sharpenable edge as found on an appropriate item such as a knife, scissors, a plane cutter or the like, in side elevation as set for sharpening an item of which the sharpenable edge is steeply bevelled, as in the case of the blade of a knife, Figure 2 shows the device as set according to figure 1, in plan view, Figure 3 shows the device as set for sharpening an item with a less steeply bevelled sharpenable edge such as a pair of scissors, in side elevation, Figure 4 shows the device as adapted into clamping fashion holding an appropriate item 3o such as a chisel, in side elevation, WO 99/56915 ~ PCT/ZA99/00031 Figure 5 shows the device as readjusted into sharpening a serratedly or like edged item such as a knife with a serrated cutting edge, in side elevation, Figure 6 shows in detail the gripping means of the device as incorporating the angle adjustment facility, Figure 7 shows the device along the view A-A in figures 1, 3 and 4, Figure 8 shows the base of the device as fitted with upstanding sharpening stones after m removal of the guiding layout and the gripping means, and Figure 9 shows a conventional serrated edge sharpening element used when the device is readjusted according to figure 5.
1s (8) DETAILED DESCRIPTION OF THE DRAWINGS
Referring to figures 1 to 5 of the drawings, sharpening equipment in the form of sharpening device, is generally indicated by reference numeral 10.
2o The device 10 comprises gripping means generally indicated by reference numeral 12, a sharpening means carrier in the form of sharpening element holder as provided by a sharpening element holding base 14 releasably holding a sharpening element in the form of a sharpening stone 16, a guiding layout arranged to perform a sharpening session at a constant sharpening angle in the form of a guiding arm as provided by a guiding rod 18 2s mounted to reciprocate along an aperture in an adjustably mounted support guide 20 in parallel with the sharpening surface 16.1 of the sharpening stone 16 in response to retaining equal corresponding inner angles 22, and an angle adjustment facility in the form of a swivelling mechanism forming the connection between the rod 18 and the gripping means 12 as provided by an connecting arm 24 extending integrally with respect to the gripping 3c> means 12 and being swivellably connected to the leading end of the rod 18 via a disc 26 WO 99/56915 . PCT/ZA99/00031 fitted to the rod 18 via a socket 27 with the disc presenting a graduated dial providing face 28 against which the leading end of the arm 24 sweeps dial fashion.
Referring to figures 1 to 3 and also to figure 5 the gripping means 12 is provided a jaw s fashion assembly 30 comprising an upper jaw 32 extending into the arm 24 and a lower jaw 34. An item of which the cutting edge requires sharpening is gripping fashion receivable in the pinching zone 36 defined between the jaws 32, 34. Such item is securely so held in response the tightening of a tightenable element 40 engaging screw fashion between the jaws 32, 34. To enhance the gripping effect an adjustment element 42 situated towards the to rear ends of the jaws 32, 34 engages screw fashion with the jaw 32 while urging with its inner end against the inner wall of the jaw 34 as suitably recessed to limit relative adjacent movement of the jaws 32, 34. The jaws are retained apart even if not holding an item by means of a spring 44 fitted onto the element 40 between the jaws 32, 34. The assembly 30 is arranged to cause its central axis 46 to pass through the pivotal point 48 between the Is gripping means and the rod 18 in response to the suitable formation of the connecting arm 24. Once an item is thus pinched in the zone 36 the axis 46 passes along its cutting edge.
Referring particularly to figures 1 and 2 a knife 50 is normally held at a relatively small inner angle 22 to result in the one face 50.1 of its leading edge 50.2 lying flush against the 2o sharpening surface 16.1 as its cutting edge bevelling angle is steep. As more clearly shown in figure 2 the knife 50 is pinched in the pinching zone along its blunt edge 50.3. When the cutting edge bevelling angle is not so steep, as shown in the case of scissors 52 in figure 3, the angles 22 require adjustment, as discussed below, to retain the leading edge face 52.1 requiring sharpening in contact with the sharpening surface 16.1.
In the case where the item of which the sharpenable edge requires sharpening carries a shape that cannot fit the embodiment of the gripping means 12 as discussed in figures 1 to 3 and 5, the gripping means 12 permits adaptation into forming a clamp 54 as shown in figure 4. To achieve this the lower jaw 34 is removed by removal of the elements 40 and 42. The so jaw 32 presents adjacent engaging apertures 56 (as seen in figure 2) engageable by means of wing nuts 58 used for securing a clamp formation 60 to the inner surface of the jaw 32.
The clamp formation 60 is thus used to clamp an appropriate item, such as a chisel 62, to WO 99/56915 _ PCT/ZA99/00031 the gripping means 12 by way of gripping it to the inner surface of the jaw 32. When so clamped its handle 64 extends alongside the disc 26. As the leading portion of the chisel 62 is still located in the zone which defines the pinching zone in the case of the figures 1 to 3 embodiment the chisel 62 will still lie along an axis 66 that passes through the pivotal point 48.
As discussed above in referring to figures 1 to 4, desired sharpening depends on the relevant face of the leading edge of a sharpenable item lying flush against the sharpening surface 16.1. To accommodate a large variety of cutting edge bevels the guiding layout in to conjunction with the swivelling mechanism is thus formed to accommodate an infinite variety of bevels within the range of the device 10. Once the sharpening angle of a cutting edge is established, the appropriate angle is set by pivoting the arm 24 relative to the rod 18 around the pivoting point 48 until the dial as defined by the end of the arm 24 ending appropriately indicating the relevant angle on the face 28. Once this is set the arm 24 is locked to the disc Is 26 by means of a pinching screw 29 pinching fashion holding the arm 24 and disc 26 at their desired setting.
An adjustment from a setting as, for example, shown in figure 1 to that of figure 3 or figure 4 will, however, also require re-setting of the rod 18 to retain a parallel relationship between 2o the rod 18 and the sharpening surface 16.1 for causing the inner angles 22 to be the same for achieving the desired sharpening effect. To this effect the guide 20 is thus adjustably mounted to a support formation in the form of a rail 68 and held in the appropriate position by means of a grub screw 70 releasably locking the guide 20 to the rail 68.
The guide 20 is thus adjusted until the rod 18 again lies parallel to the sharpening surface 16.1, which will 2s cause the angles 22 to be the same again. To promote attainment of the parallel relationship, the device 10 is fitted with a correlator in the form of a linear member as provided by the handle portion 70.1 of the screw 70 which extends in parallel with the sharpening surface 16.1 once the screw 70 is fitted to the guide 20.
so Sharpening is achieved by to-and-fro movement of the sharpenable edge of the appropriate item over the sharpening surface 16.1 in the direction of arrow 72. This is done by manual displacement of the gripping means 12 while urging it to the desired extent against the surface 16.1. It will be appreciated that sharpening is often desired to be carried through by way of uni-directional stroke. To this effect and referring to figure 7 the rod 18 passes with some vertical play along the aperture 74. As lateral movement of a cutting edge over the sharpening surface 16.1 is also often desired the aperture 74 has an oblong horizontal profile thus enabling lateral play of the rod 18 in the aperture 74 as well.
To permit a replacement or turning around of the sharpening stone 16 it fits removably to the base 14. The base 14 makes provision for filmy holding the stone 16 in position once fitted to thereto by means of a seat 75 into which the stone is locked via a locking plate 77 as io secured to the base 14 by means of a wing nut 79. The stone 16 is often required to be replaced during a sharpening action to pass though a procedure requiring stones of different grits.
In use according to the figures 1 to 4 embodiments, an object of which an edge is desired to is be sharpened is thus secured to the gripping means 12, the desired angle selected on the dial and the support guide 20 locked to the rail 68 in a rod 18 to sharpening surtace 16.1 parallel relationship. Sharpening is achieved by desirably sweeping the sharpenable edge over the surface 16.1. Once the one side of the sharpenable edge has been desirably sharpened the gripping means 12 is simply swivelled though 180 degrees owing to the 2o threaded engagement of the rod 18 to the disc 26 and the procedure repeated for the opposite side.
While the embodiments of the invention discussed with reference to figures 1 to 4 are ideal for sharpening a sharpenable edge extending at least substantially linearly, the sharpening 2s of a serrated, scalloped or saw toothed edge requires a separate sharpening action. This can in practise only be effectively achieved by displacement of the sharpening element while the item presenting such edge is retained stationary.
To this effect and referring to figures 5 and 9 the device 10 permits the replacement of the 3o disc 26 and the gripping means 12 by a conventional sharpening element 76 for use in conjunction with not-linear edges, as shown in more detail in figure 9.
Disengagement is achieved by the leading end of the rod 18 fitting screw fashion into the socket 27 fast with WO 99/56915 ~ PCT/ZA99/00031 the disc 26. The sharpening element 76 is fitted with a socket by means of which it engages screw fashion with the rod 18. To bring the item of which the non-linear edge requires sharpening into a sharpening relationship with the element 76 it is again gripped in the pinching zone 36 of the gripping means 12 as now fitted to the bottom end of the rail 68. The s rail 68 is thus releasably secured to the base 14 by being screw fashion received in a threaded socket in the base 14 and so locked by means of a wing nut 80. An indication of the sharpening angle is achieved by the rail 68 presenting graduated markings 82 that indicate the sharpening angle 84 for as long as the gripping means 12 extends transverse to the rail 68. As the rod 18 in this case does not reciprocate transverse to the rail 68, the io guide 20 provides a desiredly shaped aperture 84, as shown in figure 7 in a wing 20.1 which has an oblong shape in the direction of the rail 68 while also permitting lateral play to attend to adjacent serrations or the like.
While specialised sharpening by means of the device 10 is often only required at spaced is intervals, regular touching up is often required when, for example, a knife is used in an ongoing fashion. To this effect and referring to figure 8 the base 14 is fitted with spaced threaded apertures (not shown) into which conventional sharpening stones 86 are receivable after removal of the guiding layout and the gripping means 12.
2o While the invention deals with a device 10 which is constituted from various members the invention also extends to a set constituting the gripping means 12 as fitted with the disc 26, the holding base 14, a sharpening stone 16, the guiding rod 18, the support 20, the rail 68.
The set can also include the sharpening element 76 and the sharpening stones 86.
Claims
(1) Sharpening equipment for sharpening a sharpenable edge of an appropriate item at an at least substantially unvaried sharpening angle comprising, gripping means arranged to firmly though releasably grip such item, a sharpening element presenting a sharpening surface with the sharpening element being firmly though releasably held by a sharpening means carrier in a sharpening surface upward facing condition and against which sharpening surface the sharpenable edge of such item, as held by the gripping means, is overhead-fashion strokably moveable once the equipment is operatively used, a guiding layout incorporating an at least to-and-fro movable arm slidably mounted against undesired release along a support guide in a way that permits to-and-fro movement of the arm in a parallel relationship to the sharpening surface of the sharpening element while permitting an effective sharpening action between the gripping means, as holding such item, and the sharpening element during a sharpening session with the support guide being infinitely re-lockably adjustably mounted as regards its spacing above the carrier to a support formation extending upward from the carrier, as viewed when the equipment is operatively positioned, in a way that enables use of substantially the full extent of the sharpening surface of the sharpening element down to a small sharpening angle as defined between the plane through the edge of such item desired to be sharpened and its central plane, and an angle adjustment facility swivellably connecting the gripping means to the arm and presenting a sharpening angle indicator showing a reading relating to the magnitude of the sharpening angle, as thus defined between the sharpening surface of the sharpening element and the central axis of the gripping means being equal to the plane through the edge of such item desired to be sharpened and thus properly held by the gripping means and its central plane once held by the gripping means, sharpening at an at least substantially unvaried sharpening angle being achieved by setting the angle indicator at the desired sharpening angle prior to or after appropriately gripping of such item by the gripping means and adjusting the support guide to a position along the support formation in which the arm will be able to perform a stroking action that is parallel to the sharpening surface once sharpening of such item is commenced with owing to corresponding inner angles between the central axis of the arm and the central axis of the gripping means, on the one hand, and the sharpening plane and the central axis of the gripping means, on the other hand, being maintained equal to one another.
(2) Sharpening equipment as claimed in claim 1 in which the to-and-fro movable arm passes with adequate play along the support guide to at least permit a degree of toggling action in a plane transverse to the sharpening surface thereby to make the sharpening action more versatile by enabling lifting the gripping means and thus an item of which the sharpening edge is being sharpened from the sharpening surface thus also enabling a uni-directional sharpening action.
(3) Sharpening equipment as claimed in claim 1 or claim 2 in which the to-and fro movable arm passes with lateral play along the support guide thus enabling a lateral movement of the arm with respect to the sharpening surface as well, permitting a combined to-and-fro and lateral sharpening action.
(4) Sharpening equipment as claimed in any one of the preceding claims that is fitted with a sharpening stroke direction correlator against which movement of the arm is correlatable in promoting its parallel relationship with the sharpening surface during performance of a an item sharpening action on operative use of the equipment.
(5) Sharpening equipment as claimed in claim 4 in which the correlator is in the from of a linear member extending parallel to the sharpening face of the sharpening element from the support guide and thus in near adjacent relationship with the arm to promote its use in setting the arm in a parallel relationship to the sharpening face on preparing the equipment for use in sharpening the sharpenable edge of an item.
(6) Sharpening equipment as claimed in any one of the preceding claims in which the sharpening angle indicator is in the form of a graduated dial.
(7) Sharpening equipment as claimed in any one of the preceding claims in which the gripping means is constituted to cause its central axis, as passing centrally through its gripping zone, to transversely cut the swivelling axis of the angle adjustment facility thereby enabling sharpening opposite sharpenable edges requiring to be sharpened at at least substantially the sharpenng angle, of an item so arranged, by swivelling the arm with such item being held by the gripping means through a half circle and setting the sharpening angle indicator, as being arranged to provide an indication extending along the central axis of the gripping means, at the angle used before owing to the indicator displaying the same graduation scaling on both sides of a central point of graduation.
(8) Sharpening equipment as claimed in any one of the preceding claims in which the gripping means is in the form of a clamp for clamp fashion holding an appropriate item in a clamping zone providing the gripping zone.
(9) Sharpening equipment as claimed in claim 8 in which the clamp provides a jaw fashion assembly comprising an upper jaw and a lower jaw closable onto one another thus, amongst others, permitting the gripping of a lengthwise extending item presenting a lengthwise extending sharpenable edge along the edge remote from the sharpenable edge in the clamping zone.
(10) Sharpening equipment as claimed in claimed in 9 in which the jaws are closable by means of a tightenable element engaging screw fashion between the jaws while the gripping effect of the jaws is enhanced by an adjustment element situated remote from the leading ends of the jaws, that engages screw fashion with one jaw while urging with its inner end against the inner wall of the other jaw.
(11) Sharpening equipment as claimed in any one of the preceding claims in which the to-and-fro movable arm is in the form of a guiding rod passing along an aperture in the support guide.
(12) Sharpening equipment as claimed in any one of the preceding claims in which the support guide is infinitely re-lockably adjustably mounted as regards its spacing above the sharpening means carrier by slidably though lockably fitting along a linear rail, as providing the support formation.
(13) Sharpening equipment as claimed in claim 12 in which the support formation extends suitably to enable use of substantially the full extent of the sharpening surface of the sharpening element down to a small sharpening angle owing to extending in an upright way and adequately rearwardly spaced from the leading end of the sharpening surface to enable the sharpenable edge of an item desired to be sharpened and once held by the gripping means to be positionable at the leading end of the sharpening surface even at a small sharpening angle.
(14) Sharpening equipment as claimed in claim 13 in which the support formation is in the form of a rail extending generally S-shaped while providing a short carrier engaging rail section secured to the upper surface of the carrier and extending through a bend into a spacing rail section extending rearward from the leading end of the sharpening surface in turn extending through a bend into an upright rail section providing the effective length of the rail along which the support guide is displaceably mounted, the spacing rail section being of adequate length to achieve the object of use of substantially the full extent of the sharpening surface of the sharpening element down to a small sharpening angle.
(15) Sharpening equipment as claimed in claim 14 in which the rail is swivellably secured to the carrier enabling swivelling of its support guide holding section into an adjacent relationship with respect to the sharpening surface thereby to sharpen the edge of an item desired to be sharpened and that is longer than the width of the sharpening element without having to readjust the holding of such item by the gripping means in response to desirably swivelling and re-locking the rail to the carrier.
(16) Sharpening equipment as claimed in any one of the preceding claims in which the angle adjustment facility is fitted to the leading end of the to-and-fro movable arm.
(17) Sharpening equipment as claimed in claim 16 that makes provision for also sharpening a serrated or other similar non-linear sharpenable edge as presented by an appropriate item by permitting the replacement of the adjustable swivelling mechanism, as thus releasably located at the leading end of the to-and-fro movable arm and as extending into the gripping means, by a conventional serrated edge or the like sharpening element while making provision for firmly holding such item by way of the gripping means with the latter being secured to the end of the support formation via which it is conventionally secured to the carrier, and thus being so releasably secured, via the swivelling mechanism as released from the arm, the support guide also making provision for an aperture giving the arm adequate play to perform a to-and-fro motion at a suitably slope to sharpen the edge of such item as suitably held by the gripping means.
(18) Sharpening equipment as claimed 17 in which the support formation presents a sharpening angle graduation there along indicating the sharpening angle between the arm, as carrying a serrated or the like edge sharpening element and a correspondingly edged item as held by the gripping means in a way that causes such item to extend transverse to the support formation.
(19) A sharpening equipment set assemblable into sharpening equipment for sharpening a sharpenable edge of an appropriate item at an at least substantially unvaried sharpening angle comprising, gripping means arranged to firmly though releasably grip such item, a sharpening element carrier arranged to firmly though releasably hold a sharpening element presenting a sharpening surface, in a sharpening surface upward facing condition and against which sharpening surface the sharpenable edge of such item, as held by the gripping means, is overhead-fashion strokably moveable once the set as assembled into such equipment is in operative use, a guiding layout incorporating an at least to-and fro movable arm slidably mountable against undesired release along a support guide in a way that permits to-and-fro movement of the arm in a parallel relationship to the sharpening surface of such sharpening element while permitting an effective sharpening action between the gripping means, as holding such item, and such sharpening element during a sharpening session once the set as assembled into such equipment is in use, with the support guide being infinitely re-lockably adjustably mountable as regards its spacing above the carrier to a support formation securable to the carrier to extend upward there from, as viewed when such equipment is operatively positioned, and in a way that enables use of substantially the full extent of the sharpening surface of such sharpening element down to a small sharpening angle as defined between the plane through the edge of such item desired to be sharpened and its central plane, and an angle adjustment facility swivellably connecting the gripping means to the arm, at least once the set is assembled, and presenting a sharpening angle indicator showing a reading relating to the magnitude of the sharpening angle, as thus defined between the sharpening surface of such sharpening element, once fitted to the carrier, and the central axis of the gripping means, being equal to the plane through the edge of such item desired to be sharpened and thus properly held by the gripping means and its central plane once held by the gripping means, sharpening by means of such equipment as thus assembled from the set at an at least substantially unvaried sharpening angle being achieved by setting the angle indicator at the desired sharpening angle prior to or after appropriately gripping of such item by the gripping means and adjusting the support guide to a position in which the arm will be able to perform a stroking action that is parallel to such sharpening surface once sharpening of such item is commenced with owing to corresponding inner angles between the central axis of the arm and the central axis of the gripping means, on the one hand, and the sharpening plane and the central axis of the gripping means, on the other hand, being maintained equal to one another.
(2) Sharpening equipment as claimed in claim 1 in which the to-and-fro movable arm passes with adequate play along the support guide to at least permit a degree of toggling action in a plane transverse to the sharpening surface thereby to make the sharpening action more versatile by enabling lifting the gripping means and thus an item of which the sharpening edge is being sharpened from the sharpening surface thus also enabling a uni-directional sharpening action.
(3) Sharpening equipment as claimed in claim 1 or claim 2 in which the to-and fro movable arm passes with lateral play along the support guide thus enabling a lateral movement of the arm with respect to the sharpening surface as well, permitting a combined to-and-fro and lateral sharpening action.
(4) Sharpening equipment as claimed in any one of the preceding claims that is fitted with a sharpening stroke direction correlator against which movement of the arm is correlatable in promoting its parallel relationship with the sharpening surface during performance of a an item sharpening action on operative use of the equipment.
(5) Sharpening equipment as claimed in claim 4 in which the correlator is in the from of a linear member extending parallel to the sharpening face of the sharpening element from the support guide and thus in near adjacent relationship with the arm to promote its use in setting the arm in a parallel relationship to the sharpening face on preparing the equipment for use in sharpening the sharpenable edge of an item.
(6) Sharpening equipment as claimed in any one of the preceding claims in which the sharpening angle indicator is in the form of a graduated dial.
(7) Sharpening equipment as claimed in any one of the preceding claims in which the gripping means is constituted to cause its central axis, as passing centrally through its gripping zone, to transversely cut the swivelling axis of the angle adjustment facility thereby enabling sharpening opposite sharpenable edges requiring to be sharpened at at least substantially the sharpenng angle, of an item so arranged, by swivelling the arm with such item being held by the gripping means through a half circle and setting the sharpening angle indicator, as being arranged to provide an indication extending along the central axis of the gripping means, at the angle used before owing to the indicator displaying the same graduation scaling on both sides of a central point of graduation.
(8) Sharpening equipment as claimed in any one of the preceding claims in which the gripping means is in the form of a clamp for clamp fashion holding an appropriate item in a clamping zone providing the gripping zone.
(9) Sharpening equipment as claimed in claim 8 in which the clamp provides a jaw fashion assembly comprising an upper jaw and a lower jaw closable onto one another thus, amongst others, permitting the gripping of a lengthwise extending item presenting a lengthwise extending sharpenable edge along the edge remote from the sharpenable edge in the clamping zone.
(10) Sharpening equipment as claimed in claimed in 9 in which the jaws are closable by means of a tightenable element engaging screw fashion between the jaws while the gripping effect of the jaws is enhanced by an adjustment element situated remote from the leading ends of the jaws, that engages screw fashion with one jaw while urging with its inner end against the inner wall of the other jaw.
(11) Sharpening equipment as claimed in any one of the preceding claims in which the to-and-fro movable arm is in the form of a guiding rod passing along an aperture in the support guide.
(12) Sharpening equipment as claimed in any one of the preceding claims in which the support guide is infinitely re-lockably adjustably mounted as regards its spacing above the sharpening means carrier by slidably though lockably fitting along a linear rail, as providing the support formation.
(13) Sharpening equipment as claimed in claim 12 in which the support formation extends suitably to enable use of substantially the full extent of the sharpening surface of the sharpening element down to a small sharpening angle owing to extending in an upright way and adequately rearwardly spaced from the leading end of the sharpening surface to enable the sharpenable edge of an item desired to be sharpened and once held by the gripping means to be positionable at the leading end of the sharpening surface even at a small sharpening angle.
(14) Sharpening equipment as claimed in claim 13 in which the support formation is in the form of a rail extending generally S-shaped while providing a short carrier engaging rail section secured to the upper surface of the carrier and extending through a bend into a spacing rail section extending rearward from the leading end of the sharpening surface in turn extending through a bend into an upright rail section providing the effective length of the rail along which the support guide is displaceably mounted, the spacing rail section being of adequate length to achieve the object of use of substantially the full extent of the sharpening surface of the sharpening element down to a small sharpening angle.
(15) Sharpening equipment as claimed in claim 14 in which the rail is swivellably secured to the carrier enabling swivelling of its support guide holding section into an adjacent relationship with respect to the sharpening surface thereby to sharpen the edge of an item desired to be sharpened and that is longer than the width of the sharpening element without having to readjust the holding of such item by the gripping means in response to desirably swivelling and re-locking the rail to the carrier.
(16) Sharpening equipment as claimed in any one of the preceding claims in which the angle adjustment facility is fitted to the leading end of the to-and-fro movable arm.
(17) Sharpening equipment as claimed in claim 16 that makes provision for also sharpening a serrated or other similar non-linear sharpenable edge as presented by an appropriate item by permitting the replacement of the adjustable swivelling mechanism, as thus releasably located at the leading end of the to-and-fro movable arm and as extending into the gripping means, by a conventional serrated edge or the like sharpening element while making provision for firmly holding such item by way of the gripping means with the latter being secured to the end of the support formation via which it is conventionally secured to the carrier, and thus being so releasably secured, via the swivelling mechanism as released from the arm, the support guide also making provision for an aperture giving the arm adequate play to perform a to-and-fro motion at a suitably slope to sharpen the edge of such item as suitably held by the gripping means.
(18) Sharpening equipment as claimed 17 in which the support formation presents a sharpening angle graduation there along indicating the sharpening angle between the arm, as carrying a serrated or the like edge sharpening element and a correspondingly edged item as held by the gripping means in a way that causes such item to extend transverse to the support formation.
(19) A sharpening equipment set assemblable into sharpening equipment for sharpening a sharpenable edge of an appropriate item at an at least substantially unvaried sharpening angle comprising, gripping means arranged to firmly though releasably grip such item, a sharpening element carrier arranged to firmly though releasably hold a sharpening element presenting a sharpening surface, in a sharpening surface upward facing condition and against which sharpening surface the sharpenable edge of such item, as held by the gripping means, is overhead-fashion strokably moveable once the set as assembled into such equipment is in operative use, a guiding layout incorporating an at least to-and fro movable arm slidably mountable against undesired release along a support guide in a way that permits to-and-fro movement of the arm in a parallel relationship to the sharpening surface of such sharpening element while permitting an effective sharpening action between the gripping means, as holding such item, and such sharpening element during a sharpening session once the set as assembled into such equipment is in use, with the support guide being infinitely re-lockably adjustably mountable as regards its spacing above the carrier to a support formation securable to the carrier to extend upward there from, as viewed when such equipment is operatively positioned, and in a way that enables use of substantially the full extent of the sharpening surface of such sharpening element down to a small sharpening angle as defined between the plane through the edge of such item desired to be sharpened and its central plane, and an angle adjustment facility swivellably connecting the gripping means to the arm, at least once the set is assembled, and presenting a sharpening angle indicator showing a reading relating to the magnitude of the sharpening angle, as thus defined between the sharpening surface of such sharpening element, once fitted to the carrier, and the central axis of the gripping means, being equal to the plane through the edge of such item desired to be sharpened and thus properly held by the gripping means and its central plane once held by the gripping means, sharpening by means of such equipment as thus assembled from the set at an at least substantially unvaried sharpening angle being achieved by setting the angle indicator at the desired sharpening angle prior to or after appropriately gripping of such item by the gripping means and adjusting the support guide to a position in which the arm will be able to perform a stroking action that is parallel to such sharpening surface once sharpening of such item is commenced with owing to corresponding inner angles between the central axis of the arm and the central axis of the gripping means, on the one hand, and the sharpening plane and the central axis of the gripping means, on the other hand, being maintained equal to one another.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA98/3774 | 1998-05-05 | ||
| ZA983774 | 1998-05-05 | ||
| ZA9811222 | 1998-12-08 | ||
| ZA98/11222 | 1998-12-08 | ||
| PCT/ZA1999/000031 WO1999056915A1 (en) | 1998-05-05 | 1999-05-05 | Sharpenable edge sharpening equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2331369A1 true CA2331369A1 (en) | 1999-11-11 |
Family
ID=27144666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002331369A Abandoned CA2331369A1 (en) | 1998-05-05 | 1999-05-05 | Sharpenable edge sharpening equipment |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1075356B1 (en) |
| AT (1) | ATE273107T1 (en) |
| AU (1) | AU4102999A (en) |
| CA (1) | CA2331369A1 (en) |
| DE (1) | DE69919345T2 (en) |
| WO (1) | WO1999056915A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140335765A1 (en) * | 2013-05-08 | 2014-11-13 | Clay A. Allison | Adjustable sharpening apparatus and method for cutting implements |
| US11052512B1 (en) | 2013-05-08 | 2021-07-06 | Clay A. Allison | Adjustable knife sharpener and clamping assembly |
| US11685010B2 (en) | 2013-05-08 | 2023-06-27 | Clay A. Allison | Adjustable sharpening apparatus and method for cutting implements |
| US11897076B2 (en) | 2021-04-20 | 2024-02-13 | Clay A. Allison | Knife sharpener with clamping assembly |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE524407C2 (en) * | 2002-10-23 | 2004-08-03 | Thomas Loefvenmark | Device for browning |
| JP4773350B2 (en) * | 2003-08-13 | 2011-09-14 | エッジクラフト コーポレイション | Universal manual scissors sharpener |
| EP2883655B1 (en) * | 2013-12-12 | 2017-01-04 | Tormek AB | Jig means for a grinding machine and a grinding machine comprising the jig means |
| US9221144B2 (en) | 2013-12-23 | 2015-12-29 | David G. Powell | Universal sharpening jig for a cutting blade |
| SE538902C2 (en) * | 2015-06-01 | 2017-01-31 | Tormek Ab | A jig device for a grinding machine and a grinding machine comprising the jig device |
| DE102015118430B4 (en) * | 2015-10-28 | 2017-08-31 | Ralf Wilde | Grinding device for grinding a blade |
| CN110091264B (en) * | 2019-03-27 | 2020-11-20 | 义乌市安航科技有限公司 | Graver sharpener |
| WO2022038594A1 (en) * | 2020-08-19 | 2022-02-24 | Alex Gontmakher | A blade sharpening system |
| WO2024151416A1 (en) * | 2023-01-11 | 2024-07-18 | Darex, Llc | Modular sharpener for edged tools |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1371947A (en) * | 1919-12-15 | 1921-03-15 | Stratton Ezra Millard | Shears-grinder |
| US1422635A (en) * | 1920-12-27 | 1922-07-11 | Arthur O S Taylor | Grinding mechanism |
| US1738936A (en) * | 1926-04-26 | 1929-12-10 | Strnad James Edward | Scissors-sharpening device |
| US2165929A (en) * | 1937-04-09 | 1939-07-11 | John A Lentz | Instrument sharpener |
| US2370908A (en) * | 1944-04-03 | 1945-03-06 | Llorens Jose Amaury | Oilstoning device for plane irons and chisel blades |
| US4759153A (en) * | 1986-07-14 | 1988-07-26 | Morton Cohen | Method and apparatus for sharpening a serrated cutting edge |
-
1999
- 1999-05-05 CA CA002331369A patent/CA2331369A1/en not_active Abandoned
- 1999-05-05 DE DE69919345T patent/DE69919345T2/en not_active Expired - Lifetime
- 1999-05-05 AT AT99924554T patent/ATE273107T1/en not_active IP Right Cessation
- 1999-05-05 WO PCT/ZA1999/000031 patent/WO1999056915A1/en active Application Filing
- 1999-05-05 AU AU41029/99A patent/AU4102999A/en not_active Abandoned
- 1999-05-05 EP EP99924554A patent/EP1075356B1/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140335765A1 (en) * | 2013-05-08 | 2014-11-13 | Clay A. Allison | Adjustable sharpening apparatus and method for cutting implements |
| US9216488B2 (en) * | 2013-05-08 | 2015-12-22 | Clay A. Allison | Adjustable sharpening apparatus and method for cutting implements |
| US11052512B1 (en) | 2013-05-08 | 2021-07-06 | Clay A. Allison | Adjustable knife sharpener and clamping assembly |
| US11685010B2 (en) | 2013-05-08 | 2023-06-27 | Clay A. Allison | Adjustable sharpening apparatus and method for cutting implements |
| US11897076B2 (en) | 2021-04-20 | 2024-02-13 | Clay A. Allison | Knife sharpener with clamping assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1075356A1 (en) | 2001-02-14 |
| EP1075356B1 (en) | 2004-08-11 |
| ATE273107T1 (en) | 2004-08-15 |
| DE69919345D1 (en) | 2004-09-16 |
| AU4102999A (en) | 1999-11-23 |
| WO1999056915A1 (en) | 1999-11-11 |
| DE69919345T2 (en) | 2005-09-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |