EP2712707A1 - Knife sharpener - Google Patents
Knife sharpener Download PDFInfo
- Publication number
- EP2712707A1 EP2712707A1 EP12006786.3A EP12006786A EP2712707A1 EP 2712707 A1 EP2712707 A1 EP 2712707A1 EP 12006786 A EP12006786 A EP 12006786A EP 2712707 A1 EP2712707 A1 EP 2712707A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slot
- sharpening
- knife
- angle
- knife sharpener
- 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.)
- Granted
Links
- 238000009736 wetting Methods 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Images
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
- B24D15/081—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact
- B24D15/082—Hand tools or other devices for non-rotary grinding, polishing, or stropping specially designed for sharpening cutting edges of knives; of razors with sharpening elements in interengaging or in mutual contact the elements being rotatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades
- B24B3/54—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives
- B24B3/543—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades of hand or table knives using hand or foot driven tools
Definitions
- this object is achieved in a knife sharpener of the type mentioned in that in the radial direction at least a first of the Wetz vom convex and the second Wetz Chemistry is rectilinear or convex.
- grinding angle can now be selected with which the knife blade is to be ground.
- the opening width of the sharpening slot which is in the projection of the knife guide slot, set along the convex shape. That is, it is determined to which altitude which opening width should belong with which grinding angle. In this way, it is determined with which grinding angle a knife blade is ground depending on its thickness when the knife blade is guided down as deep as possible in the sharpening slot.
- the tangents in the radial outward direction in the amount of one third of Schwarzer each have an inclination angle to the center plane of the sharpening slot in the range of 13 ° to 17 ° and two-thirds of the sharpening height in the range of 18 ° to 22 °.
- a knife sharpener can be ground optimally because of the possible fine gradations largely all standard knife blades.
- a knife sharpener 1 according to the invention shown in the figures have two cutting disks 2, 3 and a housing 4, in which the two cutting disks 2, 3 are arranged.
- a guide slot 24 is disposed above the sharpening slot 13 in the housing 4.
- the width of the guide slot 24 corresponds approximately to the opening width of the sharpening slot 13 at its radially outer end and is constant over the length of the guide slot 24.
- guide slot 24 and sharpening slot 13 are mutually inclined by an inclination angle ⁇ , which is about 14 ° in the illustrated embodiment.
- the inclination angle ⁇ can be adjusted by means of a suitable adjustment within a predetermined range to a desired size, either by rotatability of the housing 4 or a housing part, the position of the guide slot 24 is changed or by pivoting the shaft 7 perpendicular to its axis of rotation 8, the position of Sharpening slot 13 is changeable or by a combination of both measures.
- the housing 4 or housing part and the Wetzusionn 2, 3 in the desired set angular position ⁇ locked to each other so that they do not change their position relative to each other 2, 3, 4 when Hinandherbe admire the knife blade.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Die Erfindung bezieht sich auf einen Messerschärfer mit zwei Wetzscheiben, die um dieselbe Drehachse drehbar gelagert sind, einander gegenüberstehen und einander zugewandte Wetzflächen aufweisen, die zwischen sich einen Schärfschlitz ausbilden, der sich radial nach außen erweitert, und mit einem Gehäuse, das die Wetzscheiben umgibt und über dem Schärfschlitz einen Messerführungsschlitz aufweist, der in einem Winkel zum Schärfschlitz verläuft.The invention relates to a knife sharpener with two cutting discs, which are rotatably mounted about the same axis of rotation, facing each other and facing each other Wetzflächen that form between them a sharpening slot which widens radially outward, and with a housing which surrounds the whetting discs and over the sharpening slot has a knife guide slot which extends at an angle to the sharpening slot.
Ein solcher Messerschärfer ist beispielsweise aus der
Aus der
Aufgabe der Erfindung ist es, einen gattungsgemäßen Messerschärfer so zu verbessern, dass mit ihm Messer bedarfsgerechter geschliffen werden können.The object of the invention is to improve a generic knife sharpener so that it can be ground as needed with him knife.
Erfindungsgemäß wird diese Aufgabe bei einem Messerschärfer der eingangs genannten Art dadurch gelöst, dass in radialer Richtung mindestens eine erste der Wetzflächen konvex und die zweite Wetzfläche geradlinig oder ebenfalls konvex geformt ist.According to the invention, this object is achieved in a knife sharpener of the type mentioned in that in the radial direction at least a first of the Wetzflächen convex and the second Wetzfläche is rectilinear or convex.
Mit einem erfindungsgemäßen Messerschärfer kann jede Messerklinge in ihrer Dickenrichtung mit einem Schleifwinkel entsprechend den technischen Erfordernissen oder gemäß den Wünschen des Nutzers geschliffen werden. Dadurch, dass wenigstens eine der beiden Wetzflächen in Radialrichtung konvex ausgebildet ist, ist auf dieser Seite der Messerklinge der Schleifwinkel abhängig von der Höhenlage der Messerklinge in dem Schärfschlitz. Da sich der Schärfschlitz vom Schlitzgrund aus radial nach außen erweitert, ist der Schleifwinkel gegenüber einer zur Drehachse senkrechten Ebene im Schlitzgrund am kleinsten. Das heißt, je tiefer eine Messerklinge in den Schärfschlitz hineinragt, umso kleiner bzw. spitzer ist der Schleifwinkel. Mit der Wahl der Höhenlage der Messerklinge im Schärfschlitz kann somit nunmehr der Schleifwinkel gewählt werden, mit dem die Messerklinge geschliffen werden soll. Durch geeignete Abstimmung der konvexen Form mit dem Winkel zwischen Messerführungsschlitz und Schärfschlitz wird die Öffnungsbreite des Schärfschlitzes, die in der Projektion des Messerführungsschlitzes liegt, längs der konvexen Form festgelegt. Das heißt, es wird festgelegt, zu welcher Höhenlage welche Öffnungsbreite mit welchem Schleifwinkel gehören soll. Auf diese Weise wird bestimmt, mit welchem Schleifwinkel eine Messerklinge in Abhängigkeit von deren Dicke geschliffen wird, wenn die Messerklinge so tief wie möglich in den Schärfschlitz hinuntergeführt wird.With a knife sharpener according to the invention, each knife blade can be ground in its thickness direction with a grinding angle according to the technical requirements or according to the wishes of the user. Because at least one of the two wetting surfaces is convex in the radial direction, the grinding angle on this side of the knife blade depends on the height position of the knife blade in the sharpening slot. Since the sharpening slot widens radially outward from the slot base, the grinding angle is smallest in relation to a plane perpendicular to the axis of rotation in the slot base. That is, the deeper a knife blade projects into the sharpening slot, the smaller or sharper the grinding angle. With the choice of the altitude of the knife blade in Schärfschlitz thus grinding angle can now be selected with which the knife blade is to be ground. By appropriate adjustment of the convex shape with the angle between the knife guide slot and sharpening slot, the opening width of the sharpening slot, which is in the projection of the knife guide slot, set along the convex shape. That is, it is determined to which altitude which opening width should belong with which grinding angle. In this way, it is determined with which grinding angle a knife blade is ground depending on its thickness when the knife blade is guided down as deep as possible in the sharpening slot.
Vorzugsweise ist die konvexe Form als Polygonzug ausgebildet. Bei dieser Ausführungsform weist eine Wetzfläche mindestens zwei ringförmige, zur Drehachse koaxiale Wetzflächenabschnitte auf, die mit der gegenüberstehenden anderen Wetzfläche in radialer Richtung nach außen sich abschnittsweise vergrößernde Öffnungswinkel ausbilden, wobei in radialer Richtung nach außen der mindestens zweite und jeder weitere Wetzflächenabschnitt in Bezug auf den vorherigen Wetzflächenabschnitt zu der Seite hin geneigt verläuft, die dem vorherigen Öffnungswinkel abgewandt ist. Mit diesen Maßnahmen kann eine konvexe Form kostengünstig hergestellt werden.Preferably, the convex shape is formed as a polygon. In this embodiment, a Wetzfläche at least two annular Wetzflächenabschnitte coaxial with the axis of rotation forming with the opposite other Wetzfläche in the radial direction outwardly sections widening opening angle, wherein in the radially outward direction of at least the second and each Wetzflächenabschnitt with respect to the previous Wetzflächenabschnitt inclined to the side, which faces away from the previous opening angle. With these measures, a convex shape can be produced inexpensively.
In einer anderen, ebenfalls bevorzugten Ausführungsform der Erfindung ist die konvexe Form als stetige Kurve ausgebildet. Hierdurch wird eine sehr feine Einstellung des Schleifwinkels durch entsprechende Wahl der Höhenlage im Schärfschlitz und damit eines bestimmten Kreisbogens auf der konvexen Form mit der gewünschten Tangentenneigung - d. h. mit dem gewünschten Schleifwinkel - möglich.In another, likewise preferred embodiment of the invention, the convex shape is formed as a continuous curve. As a result, a very fine adjustment of the grinding angle by appropriate selection of the altitude in the sharpening slot and thus a specific arc on the convex shape with the desired Tangentenneigung - ie with the desired grinding angle - possible.
In günstiger Weiterbildung der Erfindung sind die beiden Wetzflächen zueinander spiegelsymmetrisch und zur Drehachse rotationssymmetrisch ausgebildet. Hierdurch wird die Messerklinge auf beiden Seiten und längs der gesamten Klingenlänge identisch geschliffen.In a favorable development of the invention, the two wetting surfaces are mutually mirror-symmetrical and rotationally symmetrical with respect to the axis of rotation. As a result, the knife blade is ground identically on both sides and along the entire blade length.
In vorteilhafter Ausgestaltung der Erfindung weisen beide Wetzflächen bei symmetrischer Ausbildung in Form eines Polygonzuges mindestens einen ersten und einen zweiten Wetzflächenabschnitt auf, die einander jeweils gegenüberstehen und sich in radialer Richtung nach außen jeweils über mindestens ein Drittel der Schärfschlitzhöhe erstrecken und jeweils einen Neigungswinkel zur Mittelebene des Schärfschlitzes im Bereich von 13° bis 17° bzw. 18° bis 22° ausbilden. Mit einem solchermaßen ausgebildeten Messerschärfer kann bereits eine große Vielfalt handelsüblicher Messer ohne weiteres unter jeweils nahezu optimalen Bedingungen geschliffen werden.In an advantageous embodiment of the invention, both Wetzflächen have symmetrical training in the form of a polygon at least a first and a second Wetzflächenabschnitt, each facing each other and extending in the radial direction outward over at least one third of Schärfschlitzhöhe and each have a tilt angle to the median plane of the Schärfschlitzes in the range of 13 ° to 17 ° or 18 ° to 22 ° form. With a knife sharpener designed in this way, a large variety of commercially available knives can be readily ground under almost optimum conditions.
In einer ebenso bevorzugten Ausführungsform haben bei Wetzflächen, deren konvexe Form eine stetige Kurve ist und die zueinander symmetrisch ausgebildet sind, die Tangenten in radialer Richtung nach außen in Höhe eines Drittels der Schärfschlitzhöhe jeweils einen Neigungswinkel zur Mittelebene des Schärfschlitzes im Bereich von 13° bis 17° und in Höhe von zwei Dritteln der Schärfschlitzhöhe im Bereich von 18° bis 22°. Mit einem solchen Messerschärfer können wegen der möglichen Feinabstufungen weitestgehend sämtliche handelsüblichen Messerklingen optimal geschliffen werden.In an equally preferred embodiment, in Wetzflächen whose convex shape is a continuous curve and which are symmetrical to each other, the tangents in the radial outward direction in the amount of one third of Schärfschlitzhöhe each have an inclination angle to the center plane of the sharpening slot in the range of 13 ° to 17 ° and two-thirds of the sharpening height in the range of 18 ° to 22 °. With such a knife sharpener can be ground optimally because of the possible fine gradations largely all standard knife blades.
Vorzugsweise ist der Winkel zwischen Messerführungsschlitz und Schärfschlitz einstellbar. Hierdurch ist die Zuordnung von Öffnungsbreite zur Höhenlage innerhalb des Schärfschlitzes und damit zum Schleifwinkel veränderbar. Auf diese Weise wird die maximale Tiefe, mit der eine Messerklinge in Abhängigkeit von ihrer Dicke in den Schärfschlitz hineinragen kann, und damit der für eine gegebene Klingendicke minimal mögliche Schleifwinkel eingestellt.Preferably, the angle between the knife guide slot and sharpening slot is adjustable. As a result, the assignment of opening width to the altitude within the sharpening slot and thus the grinding angle is changeable. In this way, the maximum depth with which a knife blade can protrude into the sharpening slot as a function of its thickness and thus the minimum possible grinding angle for a given blade thickness is set.
Dabei ist der Winkel zwischen Messerführungsschlitz und Schärfschlitz vorzugsweise im Bereich von 5° bis 25° einstellbar. Mit diesem Bereich kann die maximal mögliche Eindringtiefe einer Messerklinge in den Schärfschlitz und somit ebenfalls der dort vorhandene Schleifwinkel in einem Bereich eingestellt werden, der die bekannten Erfordernisse und Bedürfnisse beim Schleifen von Messern abdeckt.The angle between the knife guide slot and Schärfschlitz is preferably adjustable in the range of 5 ° to 25 °. With this range, the maximum possible penetration depth of a knife blade in the sharpening slot and thus also the existing grinding angle can be adjusted in a range that covers the known requirements and needs when grinding knives.
Die Erfindung wird nachfolgend anhand der Zeichnungen beispielshalber noch näher erläutert. Es zeigen:
- Fig. 1
- in schematischer Darstellung mit in Horizontalrichtung vergrößertem Maßstab zwei Wetzscheiben einer ersten Ausführungsform eines erfindungsgemäßen Messerschärfers;
- Fig. 2
- eine der
Fig. 1 ähnliche Darstellung einer zweiten Ausführungsform eines erfindungsgemäßen Messerschärfers; - Fig. 3
- in schematischer Darstellung eine Draufsicht auf einen Ausschnitt einer Ausführungsform eines erfindungsgemäßen Messerschärfers, mit Führungsschlitz und Schärfschlitz; und
- Fig. 4
- in schematischer Darstellung eine Schnittansicht längs Linie IV - IV in
Fig. 3 .
- Fig. 1
- in a schematic representation with scale enlarged in the horizontal direction two cutting wheels of a first embodiment of a knife sharpener according to the invention;
- Fig. 2
- one of the
Fig. 1 similar representation of a second embodiment of a knife sharpener according to the invention; - Fig. 3
- a schematic representation of a top view of a section of an embodiment of a knife sharpener according to the invention, with guide slot and Schärfschlitz; and
- Fig. 4
- in a schematic representation of a sectional view taken along line IV - IV in
Fig. 3 ,
Die in den Figuren dargestellten Ausführungsformen eines erfindungsgemäßen Messerschärfers 1 weisen zwei Wetzscheiben 2, 3 und ein Gehäuse 4 auf, in dem die beiden Wetzscheiben 2, 3 angeordnet sind.The embodiments of a
Die beiden Wetzscheiben 2, 3 weisen jeweils eine zentrale Durchgangsöffnung 5, 6 auf, die von einer gemeinsamen Welle 7 durchlaufen werden. Die Wetzscheiben 2, 3 stehen einander auf der Welle 7 gegenüber und sind mit ihr drehfest verbunden. Die Welle 7 selbst ist im Gehäuse 4 um eine Drehachse 8 drehbar gelagert.The two Wetzscheiben 2, 3 each have a central passage opening 5, 6, which are traversed by a
In ihrem an die Durchgangsöffnung 5, 6 angrenzenden Bereich weisen die beiden Wetzscheiben 2, 3 Flächen 9, 10 auf, die senkrecht zur Welle 7 verlaufen, aneinander anliegen und miteinander verklebt sind.In their adjacent to the passage opening 5, 6 area, the two Wetzscheiben 2, 3
Die beiden Wetzscheiben 2, 3 weisen einander zugewandte Wetzflächen 11, 12 auf, die zwischen sich einen umlaufenden Ringspalt bzw. Schärfschlitz 13 ausbilden. Der Schärfschlitz 13 erweitert sich vom Schlitzgrund 14 aus monoton radial nach außen. Dabei sind die einander gegenüberstehenden Wetzflächen 11, 12 konvex und zu einer Ebene 15, die senkrecht zur Drehachse 8 durch den Schlitzgrund 14 verläuft, symmetrisch ausgebildet. Diese Ebene 15 wird auch als Mittelebene des Schärfschlitzes 13 bezeichnet. In Drehrichtung bzw. Umfangsrichtung der Wetzscheiben 2, 3 sind die Wetzflächen 11, 12 rotationssymmetrisch ausgebildet.The two
Bei der in
Bei der in
Wie in den
In der Draufsicht (
Bei einer gegebenen konvexen Form und Öffnungsbreite des Schärfschlitzes 13 wird durch den Neigungswinkel α zwischen Führungsschlitz 24 und Schärfschlitz 13 derjenige Kreisbogen auf den Wetzflächen 11, 12 bestimmt, auf denen eine Messerklinge mit gegebener Dicke geschliffen wird. Mit einer Verstellung des Neigungswinkels α zwischen Führungsschlitz 24 und Schärfschlitz 13 kann dieser Kreisbogen bei sich ändernden Anforderungen verändert werden. Denkbar ist beispielsweise eine Verstellbarkeit im Bereich von 5° bis 25°.For a given convex shape and opening width of the sharpening
Claims (8)
zwei Wetzscheiben (2, 3), die um dieselbe Drehachse (8) drehbar gelagert sind, einander gegenüberstehen und einander zugewandte Wetzflächen (11, 12) aufweisen, die zwischen sich einen Schärfschlitz (13) ausbilden, der sich radial nach außen erweitert, und mit
einem Gehäuse (4), das die Wetzscheiben (2, 3) umgibt und über dem Schärfschlitz (13) einen Messerführungsschlitz (24) aufweist, der in einem Winkel (α) zum Schärfschlitz (13) verläuft,
dadurch gekennzeichnet, dass
in radialer Richtung mindestens eine erste der Wetzflächen (11) konvex und die zweite Wetzfläche (12) geradlinig oder ebenfalls konvex ausgebildet ist.Knife sharpener with
two beaters (2, 3) which are rotatably mounted about the same axis of rotation (8) facing each other and facing facing Wetzflächen (11, 12), which form between them a sharpening slot (13) which widens radially outwardly, and With
a housing (4) which surrounds the whetting disks (2, 3) and has a knife guide slot (24) above the sharpening slot (13) which extends at an angle (α) to the sharpening slot (13),
characterized in that
at least a first of the Wetzflächen (11) in the radial direction is convex and the second Wetzfläche (12) is rectilinear or convex.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12006786.3A EP2712707B1 (en) | 2012-09-28 | 2012-09-28 | Knife sharpener |
US14/023,522 US9289883B2 (en) | 2012-09-28 | 2013-09-11 | Knife sharpener |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12006786.3A EP2712707B1 (en) | 2012-09-28 | 2012-09-28 | Knife sharpener |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2712707A1 true EP2712707A1 (en) | 2014-04-02 |
EP2712707B1 EP2712707B1 (en) | 2019-07-03 |
Family
ID=47008255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12006786.3A Active EP2712707B1 (en) | 2012-09-28 | 2012-09-28 | Knife sharpener |
Country Status (2)
Country | Link |
---|---|
US (1) | US9289883B2 (en) |
EP (1) | EP2712707B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108655837A (en) * | 2018-05-11 | 2018-10-16 | 柳州市怀远数控技术开发有限公司 | A kind of blade processing unit (plant) of double-faced toothed blade |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3062329B1 (en) * | 2017-02-02 | 2020-01-10 | Sogest | SHARPENING DEVICE |
CN107627158A (en) * | 2017-09-18 | 2018-01-26 | 姚前华 | A kind of knife sharpener |
CN108436611A (en) * | 2018-06-14 | 2018-08-24 | 陈金水 | A kind of electric knife grinder |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2114106A (en) * | 1935-08-20 | 1938-04-12 | Geveke William | Grinding device |
DE3901127A1 (en) | 1988-01-20 | 1989-08-03 | Fiskars Ab Oy | DEVICE FOR SHARPENING KNIVES |
DE4341872A1 (en) | 1993-12-08 | 1995-06-14 | Udo Rieser | Manual knife sharpening implement |
WO2010101507A1 (en) * | 2009-03-05 | 2010-09-10 | Tore Eklund | Grinding wheel |
US20110034111A1 (en) * | 2009-08-07 | 2011-02-10 | Bela Elek | Novel sharpeners to create cross-grind knife edges |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1831863A (en) * | 1928-04-30 | 1931-11-17 | Pike Mfg Company | Portable grinding machine |
US2504194A (en) * | 1947-05-06 | 1950-04-18 | George E Harrington | Pencil pointing device |
US2646653A (en) | 1948-12-31 | 1953-07-28 | Bessie F Murchison | Grinder with meshing teeth for knives, etc. |
BE556718A (en) | 1956-04-20 | |||
US2972840A (en) * | 1957-04-17 | 1961-02-28 | Clarence H Ludwig | Blade sharpening apparatus |
US3570193A (en) * | 1969-08-01 | 1971-03-16 | Francis T Barrett | Mobile implement sharpening machine |
DE3202742A1 (en) | 1982-01-28 | 1983-08-04 | Udo 6200 Wiesbaden Rieser | KNIFE SHARPENER |
FI74230C (en) | 1986-02-04 | 1988-01-11 | Fiskars Ab Oy | Device for sharpening knives. |
US5371977A (en) * | 1993-08-17 | 1994-12-13 | Liner; Christopher A. | Portable, in-place sharpener for lawn mower blades and the like |
US8926408B2 (en) * | 2012-05-03 | 2015-01-06 | Tom Hiroshi Hasegawa | Blade sharpener |
-
2012
- 2012-09-28 EP EP12006786.3A patent/EP2712707B1/en active Active
-
2013
- 2013-09-11 US US14/023,522 patent/US9289883B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2114106A (en) * | 1935-08-20 | 1938-04-12 | Geveke William | Grinding device |
DE3901127A1 (en) | 1988-01-20 | 1989-08-03 | Fiskars Ab Oy | DEVICE FOR SHARPENING KNIVES |
DE4341872A1 (en) | 1993-12-08 | 1995-06-14 | Udo Rieser | Manual knife sharpening implement |
WO2010101507A1 (en) * | 2009-03-05 | 2010-09-10 | Tore Eklund | Grinding wheel |
US20110034111A1 (en) * | 2009-08-07 | 2011-02-10 | Bela Elek | Novel sharpeners to create cross-grind knife edges |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108655837A (en) * | 2018-05-11 | 2018-10-16 | 柳州市怀远数控技术开发有限公司 | A kind of blade processing unit (plant) of double-faced toothed blade |
Also Published As
Publication number | Publication date |
---|---|
US20140170941A1 (en) | 2014-06-19 |
US9289883B2 (en) | 2016-03-22 |
EP2712707B1 (en) | 2019-07-03 |
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