CA2133910C - Knives sharpening guide - Google Patents
Knives sharpening guideInfo
- Publication number
- CA2133910C CA2133910C CA 2133910 CA2133910A CA2133910C CA 2133910 C CA2133910 C CA 2133910C CA 2133910 CA2133910 CA 2133910 CA 2133910 A CA2133910 A CA 2133910A CA 2133910 C CA2133910 C CA 2133910C
- Authority
- CA
- Canada
- Prior art keywords
- blade
- sharpening
- slot
- angle
- angle guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Knives (AREA)
Abstract
An improved blade sharpening angle guide adapted for aligning and holding a knife blade at a proper angle to a sharpening steel for a manual sharpening of the blade cutting edge is disclosed. The sharpening guide comprises an elongated block having a truncately triangular cross-section. The elongated block has a longitudinal slot therethrough wherein the knife blade or the like may be releasably held with the blade cutting edge extending a distance outside the slot for being sharpened, whereby the angle of the blade to the sharpening steel is controlled when the blade and block combination are drawn across the sharpening steel.
Description
2133~1~
~iel~ of The Invention The present invention relates to a blade sharpening angle guide adapted for aligning and holding a knife blade at a proper angle for the sharpening of the cutting edge.
Background of The Invention The use of blade sharpening angle guides is known in the prior art. For example, U.S. Patent 2,437,495 to Anderson, issued March 9, 1948, discloses a blade honing device for application to a blade for controlling the angle of the blade relative to a hone when being sharpened. The device includes a pair of blade clamping jaws connectéd together at the longitl~i n~ 1 upper edges thereof and having hone contacting surfaces disposed outside the plane of the blade engaging portions of the device, the upper longitl7~; n~ 1 j aw connecting portion being inwardly slotted a distance from each end thereof to provide flexibility of the ends of the jaws for separation thereof.
There are other patents regarding the similar subject matter, such as U.S. Patent 4,991,375 to Stickles, U.S. Patent 4,866,845 to McEvily.
Summary of The Invention An object of the present invention is to provide an improved device for aligning and holding a knife blade at a proper angle for manual sharpening of the cutting edge in a manner which is safe, secure, economical and easy for use.
In accordance with one aspect of the invention, there is provided a blade sharpening angle guide adapted for aligning and holding a knife blade at a proper angle to a sharpening device for manual sharpening of the cutting edge. The blade sharpening angle guide comprises an elongated block. The block has a planar top, two identical side faces inclining one towards another and a bottom whereby a truncately triangular cross-section is formed. The block further has a longitl7~1 n~l slot. The slot extends along the length of the bottom and is orthogonal to the planar top, whereby a knife blade may be received with the blade cutting edge extending a distance outside the slot for being sharpened at an angle which is identical on both sides when each of the two side faces serves alternatively as a sharpening device bearing surface.
In an embodiment of the invention, the elongated block comprises a first end formed square and a second end formed curved whereby a point is formed.
213391~) Conveniently, the slot is formed with such a width tha~ a knife blade may fitly slide in the slot and be releasably but securely held by the slot.
Preferably, the slot is formed with a depth whereby the knife blade may be received in such a position that each of the two identical sharpening angles is defined by a centre plane of the slot and each of the two side faces.
The advantages of the present invention are the simple structure of the device and a safe, secure, economical and easy manner for use.
Further features of the invention will be apparent from the following description and appended claims.
Brief Description of The Drawings The present invention will be further understood from the following description with reference to the drawings in which:
Fig. 1 is a side view, illustrating a blade sharpening angle guide and the use thereof in accordance with an preferred embodiment of the present invention, and Fig. 2 is a cross-sectional view of the embodiment of Fig. 1 taken along line 2-2, illustrating the sharpening angle.
Similar references are used in different figures to denote similar components.
Detailed Description of The Preferred Embodiment Referring to Fig. 1, there is illustrated in a side view, a blade sharpening angle guide in accordance with a preferred embodiment of the resent invention. The blade sharpening angle guide 10 has an elongated block 12, and is adapted for use of aligning and holding a knife blade which is shown in a phantom outline at a proper angle for a manual sharpening of the blade cutting edge, co-operating with a sharpening steel which is also shown in a phantom outline. Other sharpening device rather than the sharpening steel, for example, a sharpening stone may also be used.
The elongated block has a first end 14 formed square and a second end 16 formed curved whereby a point 18 is formed so as to match the blade outline substantially.
Now turning to Fig. 2, there is illustrated the guide 10 in a cross-sectional view of the embodiment of Fig. 1 taken along line 2-2. The block 12 comprises a planar top 20, two identical side faces 22 and 24 inclining one towards another and a bottom 26 ~ A
~ 2~ 33910 whereby a truncately triangular cross-section is formed. A slot 28 is provided along the length of the bottom 26 and is orthogonal to the planar top 20, adapted for receiving the blade with the blade cutting edge extending a distance outside the slot 28. In accordance with the resilient feature of the material of which the block 12 is made, the slot 28 is formed with a such width that the blade may fitly slide in the slot 28 and be releasably, but securely held by the slot 28. Furthermore, the slot 28 has such a depth that the blade may be received by the slot 28 in a position in which the blade cutting edge in the cross-section is superposed on the tip point of the triangle which is defined by the two inclining side faces 22 and 24 if the triangle had not been truncated. The blade in such a position will be sharpened on either side at a sharpening angle 30 defined by the centre plane 32 of the slot 28 and each of the two side faces 22 and 24 when the blade is sharpened by a sharpening steel and each of the two side faces 22 and 24 serves alternatively as a sharpening steel bearing surface.
It is apparent that the angle 30 is identical to the other defined on the other side.
In operation, the knife blade slides in the slot 28 of the blade sharpening angle guide 10 and is held thereby in the proper position as shown in Fig. 1 and Fig. 2. When the knife blade and blade sharpening angle guide 10 combination are drawn across the sharpening steel, one of the two side faces 22 and 24 contacting the sharpening steel, the controlled sharpening angle 30 is achieved. A similar procedure is taken for the sharpening on the other side. If the blade is not received by the slot 28 in such a particular position described above, the angle at which the blade is sharpened is not the angle 30, but is still identical to the sharpening angle on the other side because of the symmetry of the blade sharpening angle guide.
The material of which the blade sharpening angle guide 10 is made may be selected from appropriate plastics if the blade sharpening angle guide 10 is used with a sharpening steel which is provided with a smooth guiding surface adapted for bearing the side faces 22 and 24, for example, a sharpening steel as disclosed in my Canadian patent application 2134011.
The blade sharpening angle guide may be made of varying lengths and sizes for different sizes of knives, for example, kitchens knives. However, numerous variations and adaptations may be made to the particular embodiment of the present invention without departing from the scope of the invention, which is defined in the claims.
~$~
~, ~
~iel~ of The Invention The present invention relates to a blade sharpening angle guide adapted for aligning and holding a knife blade at a proper angle for the sharpening of the cutting edge.
Background of The Invention The use of blade sharpening angle guides is known in the prior art. For example, U.S. Patent 2,437,495 to Anderson, issued March 9, 1948, discloses a blade honing device for application to a blade for controlling the angle of the blade relative to a hone when being sharpened. The device includes a pair of blade clamping jaws connectéd together at the longitl~i n~ 1 upper edges thereof and having hone contacting surfaces disposed outside the plane of the blade engaging portions of the device, the upper longitl7~; n~ 1 j aw connecting portion being inwardly slotted a distance from each end thereof to provide flexibility of the ends of the jaws for separation thereof.
There are other patents regarding the similar subject matter, such as U.S. Patent 4,991,375 to Stickles, U.S. Patent 4,866,845 to McEvily.
Summary of The Invention An object of the present invention is to provide an improved device for aligning and holding a knife blade at a proper angle for manual sharpening of the cutting edge in a manner which is safe, secure, economical and easy for use.
In accordance with one aspect of the invention, there is provided a blade sharpening angle guide adapted for aligning and holding a knife blade at a proper angle to a sharpening device for manual sharpening of the cutting edge. The blade sharpening angle guide comprises an elongated block. The block has a planar top, two identical side faces inclining one towards another and a bottom whereby a truncately triangular cross-section is formed. The block further has a longitl7~1 n~l slot. The slot extends along the length of the bottom and is orthogonal to the planar top, whereby a knife blade may be received with the blade cutting edge extending a distance outside the slot for being sharpened at an angle which is identical on both sides when each of the two side faces serves alternatively as a sharpening device bearing surface.
In an embodiment of the invention, the elongated block comprises a first end formed square and a second end formed curved whereby a point is formed.
213391~) Conveniently, the slot is formed with such a width tha~ a knife blade may fitly slide in the slot and be releasably but securely held by the slot.
Preferably, the slot is formed with a depth whereby the knife blade may be received in such a position that each of the two identical sharpening angles is defined by a centre plane of the slot and each of the two side faces.
The advantages of the present invention are the simple structure of the device and a safe, secure, economical and easy manner for use.
Further features of the invention will be apparent from the following description and appended claims.
Brief Description of The Drawings The present invention will be further understood from the following description with reference to the drawings in which:
Fig. 1 is a side view, illustrating a blade sharpening angle guide and the use thereof in accordance with an preferred embodiment of the present invention, and Fig. 2 is a cross-sectional view of the embodiment of Fig. 1 taken along line 2-2, illustrating the sharpening angle.
Similar references are used in different figures to denote similar components.
Detailed Description of The Preferred Embodiment Referring to Fig. 1, there is illustrated in a side view, a blade sharpening angle guide in accordance with a preferred embodiment of the resent invention. The blade sharpening angle guide 10 has an elongated block 12, and is adapted for use of aligning and holding a knife blade which is shown in a phantom outline at a proper angle for a manual sharpening of the blade cutting edge, co-operating with a sharpening steel which is also shown in a phantom outline. Other sharpening device rather than the sharpening steel, for example, a sharpening stone may also be used.
The elongated block has a first end 14 formed square and a second end 16 formed curved whereby a point 18 is formed so as to match the blade outline substantially.
Now turning to Fig. 2, there is illustrated the guide 10 in a cross-sectional view of the embodiment of Fig. 1 taken along line 2-2. The block 12 comprises a planar top 20, two identical side faces 22 and 24 inclining one towards another and a bottom 26 ~ A
~ 2~ 33910 whereby a truncately triangular cross-section is formed. A slot 28 is provided along the length of the bottom 26 and is orthogonal to the planar top 20, adapted for receiving the blade with the blade cutting edge extending a distance outside the slot 28. In accordance with the resilient feature of the material of which the block 12 is made, the slot 28 is formed with a such width that the blade may fitly slide in the slot 28 and be releasably, but securely held by the slot 28. Furthermore, the slot 28 has such a depth that the blade may be received by the slot 28 in a position in which the blade cutting edge in the cross-section is superposed on the tip point of the triangle which is defined by the two inclining side faces 22 and 24 if the triangle had not been truncated. The blade in such a position will be sharpened on either side at a sharpening angle 30 defined by the centre plane 32 of the slot 28 and each of the two side faces 22 and 24 when the blade is sharpened by a sharpening steel and each of the two side faces 22 and 24 serves alternatively as a sharpening steel bearing surface.
It is apparent that the angle 30 is identical to the other defined on the other side.
In operation, the knife blade slides in the slot 28 of the blade sharpening angle guide 10 and is held thereby in the proper position as shown in Fig. 1 and Fig. 2. When the knife blade and blade sharpening angle guide 10 combination are drawn across the sharpening steel, one of the two side faces 22 and 24 contacting the sharpening steel, the controlled sharpening angle 30 is achieved. A similar procedure is taken for the sharpening on the other side. If the blade is not received by the slot 28 in such a particular position described above, the angle at which the blade is sharpened is not the angle 30, but is still identical to the sharpening angle on the other side because of the symmetry of the blade sharpening angle guide.
The material of which the blade sharpening angle guide 10 is made may be selected from appropriate plastics if the blade sharpening angle guide 10 is used with a sharpening steel which is provided with a smooth guiding surface adapted for bearing the side faces 22 and 24, for example, a sharpening steel as disclosed in my Canadian patent application 2134011.
The blade sharpening angle guide may be made of varying lengths and sizes for different sizes of knives, for example, kitchens knives. However, numerous variations and adaptations may be made to the particular embodiment of the present invention without departing from the scope of the invention, which is defined in the claims.
~$~
~, ~
Claims (4)
1. A blade sharpening angle guide adapted for aligning and holding a knife blade at a proper angle to a sharpening device for manual sharpening of the cutting edge, the blade sharpening angle guide comprising:
an elongated block having a planar top, two identical side faces inclining one towards another and a bottom whereby a truncately triangular cross-section is formed, the block further having a longitudinal slot, the slot extending along a length of the bottom and being orthogonal to the planar top, whereby a knife blade may be received with the blade cutting edge extending a distance outside the slot for being sharpened at the angle which is identical on both sides when each of the two side faces serves alternatively as a sharpening device bearing surface.
an elongated block having a planar top, two identical side faces inclining one towards another and a bottom whereby a truncately triangular cross-section is formed, the block further having a longitudinal slot, the slot extending along a length of the bottom and being orthogonal to the planar top, whereby a knife blade may be received with the blade cutting edge extending a distance outside the slot for being sharpened at the angle which is identical on both sides when each of the two side faces serves alternatively as a sharpening device bearing surface.
2. A blade sharpening angle guide according to claim 1 wherein the block comprises a first end formed square and a second end formed curved whereby a point is formed.
3. A blade sharpening angle guide according to claim 1 or 2 wherein the slot is formed with such a width that the knife blade may fitly slide in the slot and be releasably but securely held by the slot.
4. A blade sharpening angle guide according to claim 1 or 2 wherein the slot is formed with a depth whereby the knife blade may be received by the slot in a position in which each of the two identical sharpening angles is defined by a centre plane of the slot and each of the two side faces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2133910 CA2133910C (en) | 1994-10-20 | 1994-10-20 | Knives sharpening guide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2133910 CA2133910C (en) | 1994-10-20 | 1994-10-20 | Knives sharpening guide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2133910A1 CA2133910A1 (en) | 1996-04-21 |
| CA2133910C true CA2133910C (en) | 1996-08-20 |
Family
ID=4154493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2133910 Expired - Fee Related CA2133910C (en) | 1994-10-20 | 1994-10-20 | Knives sharpening guide |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2133910C (en) |
-
1994
- 1994-10-20 CA CA 2133910 patent/CA2133910C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2133910A1 (en) | 1996-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |