• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ABSTRACT A grinder/polisher apparatus is disclosed, the apparatus comprising first andsecond sets of grinding elements (2, 3) facing each other under an angle (o) thusforming between the sets of grinding elements a V-groove in Which the cutting edgeof a knife is insertable for movement upon grinding, Wherein the grinding elementsare supported in holders (5, 6). The grinding elements (2, 3) are pivotally arrangedin the holders (5, 6) about axes (R, R') the inclinations of Which correspond With the opening angle (o) of the V-groove.
    公开号:SE1550652A1
    申请号:SE1550652
    申请日:2015-05-21
    公开日:2016-11-22
    发明作者:Eklund Tore
    申请人:Eklund Tore；
    IPC主号:
    专利说明:

    TITLEA grinder/polisher apparatus and a grinding element thereforTECHNICAL FIELD OF THE INVENTIONThe present invention relates to a grinder apparatus of the type which comprisesfirst and second sets of grinding elements facing each other under an angle, thusforming between the sets of grinding elements a V-groove in which the cutting edgeof a knife is insertable for movement upon grinding, wherein the grinding elementsare supported in holders. The invention further relates to the grinding element perse, which can be embodied with coarse or fine abrasive for grinding or polishingtreatment of a knife edge.
    BACKGROUND AND PRIOR ARTA similar grinder or polisher apparatus is previously known from WO15 / 030655, disclosing opposite sets of spaced apart grinding elements whichengage in an overlapping relation to form a V-groove for insertion of the knife. Thegrinding elements are individually supported in holders and biased towards thecenter of the V-groove by separate springs. The V-groove this way adapts its depthto the orientation of the knife and a good result is achieved even if the knife is notmoved strictly horizontally as seen in a vertical view.
    Even though the grinder of WO 20 15 / 030655 has some ability to adapt the V-groove to a knife which is not moved in an ideal straight path in the V-groove asseen in a horizontal view, the active area of contact between the knife and thegrinding elements will be restricted to a limited region of the grinding elements ifthe knife is moved in a path that is non-parallel with the front faces of the grindingelements. This may lead to local wear-down of the grinding elements and reducedefficiency in the grinding or polishing treatment of the knife.
    SUMMARY OF THE INVENTIONThe present invention aims to provide an improved grinder/polisher apparatus fortreating the cutting edge of a knife, which avoids the drawbacks and problemsrelated to a non-straight orientation or non-linear motion of the knife in the V-groove, in the horizontal view.
    The object is met in a grinder/polisher apparatus as described initially, wherein thegrinding elements are pivotally arranged in the holders about aXes the inclinationsof which correspond with the opening angle of the V-groove.
    As used herein, the expression “the inclinations of which correspond with theopening angle of the V-groove” is aimed to specify the orientation of the pivot axesin relation to the grinding elements and the V-groove.
    Obviously, the V-groove is defined by the abrasive front faces in the sets of grindingelements, the front faces forming the sloping sides of the V-groove. In preferredembodiments of the invention, the grinding elements are pivotally arranged in aforward end of the holders (i.e. the end facing the V-groove) about axes that areparallel or nearly parallel to the front faces of the grinding elements. In other words,the pivot aXes may be parallel or nearly parallel to the sides of the V-groove. Thus, ifthe inclinations of the pivot aXes are changed it will affect the opening angle of theV-groove. The opening angle of the V-groove may be adjustable to adapt the grinderapparatus for treatment of differently angled knife cutting edges, whereby change ofthe V-groove angle can be accomplished by changing the position of the holders inthe apparatus, this way changing the inclinations of the pivot aXes and of thegrinding elements accordingly.
    However, a perfect alignment between the pivot axes and the front faces of thegrinding elements may not always be critical and hence the relation can be definedas parallel or nearly parallel. The eXpression “correspond With” shall be understoodto include embodiments wherein the pivot axes are parallel or nearly parallel withthe sloping V-groove sides which are defined by the front faces of the grindingelements.
    In embodiments of the invention the grinding element has a grinding or polishingfront face and a rear face comprising coupling means by which the grinding elementis pivotally hinged to the holder. This embodiment is advantageously applied topress-shaped grinding elements.
    The above mentioned coupling means may be realized in the form of a ridge havinga part-circular sectional profile that runs in the length direction of the grindingelement, the ridge pivotally received in a corresponding profile of a groove formed inthe forward end of the holder.
    In this embodiment at least one of the rear face of the grinding element and theforward end of the holder can be formed With surfaces which are sloping at anobtuse angle from the ridge or from the groove respectively.
    Another embodiment of the invention comprises a grinding element having agrinding or polishing front face and a rear face riding on a curved or partiallycircular forward end of the holder. This embodiment is advantageously applied togrinding elements formed from abrasive coated plate members.
    In this latter embodiment the longitudinal sides of the grinding element are formedwith a lug respectively which movably engages a recess formed in each side flankthat adjoins the forward end of the holder, wherein the lug and recess in mutualengagement control a sideways tilting movement of the grinding element withrespect to the holder. The lug and recess may be extended the length of the grindingelement.
    In the apparatus, preferably, the grinding elements of the first or second sets ofgrinding elements are individually biased by separate springs towards the other setof grinding elements.
    In analogy With the aforesaid the present invention further relates to a grindingelement for a grinder/polisher apparatus that comprises first and second sets ofgrinding elements facing each other under an angle thus forming between the frontfaces of grinding elements a V-groove in which the cutting edge of a knife isinsertable for movement upon grinding, wherein the grinding element is supportedin a holder.
    In accordance with this second aspect of the present invention, the grindingelement is characterized by being pivotally arranged in the holder about an aXis theinclination of which corresponds with the inclination of the front face of thegrinding element.
    In one embodiment the grinding element is realized in the form of a press-shapedbody having a planar or substantially planar front face, two sides connecting thefront face with a rear face, and including a ridge having a part-circular sectionalprofile that protrudes above the rear face and runs along the longitudinal center ofthe rear face. In this embodiment the rear face is advantageously formed with twoopposite surfaces which are sloping at an obtuse intermediate angle from the ridgetowards the sides of the press-shaped body.
    In another embodiment the grinding element is realized in the form of a platemember having a planar or substantially planar and abrasive coated front face, thelongitudinal sides of the plate member swept back and inwards to produceengagement lugs extended the length of the plate member.
    SHORT DESCRIPTION OF THE DRAWINGSFurther details and advantages of the invention will be explained below withreference made to the accompanying schematic drawings. In the drawings,Fig. 1 is a partially broken away side view of a grinder/polisher apparatus to whichthe present invention can be applied,Fig. 2 is a view from above showing the grinding elements pivotally adjusted to thenon-straight orientation of a knife to be treated,Fig. 3 is a cross-sectional view through a grinding element pivotally supported in aholder according to one embodiment of the invention, andFig. 4 is a corresponding cross-sectional view through a grinding element pivotallyhinged to a holder according to another embodiment of the invention.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTSThe grinder or polisher apparatus 1 of Fig. 1 comprises first and second sets ofgrinding or polishing elements 2 and 3 facing each other under an angle o, thusforming between the sets of grinding elements a V-groove in which the cutting edge4 of a knife is insertable for grinding in a back and forwards movement as seen inthe horizontal view. The movement of the knife in the horizontal view is indicatedthrough an arrow A in Fig. 2.
    The grinding elements 2, 3 are supported in holders 5 and 6. The holders 5, 6 arejournalled in blocks 7, 8 and movable in opposite directions as indicated throughthe arrows B. Springs 9 and 10 apply a biasing force to the holders and grindingelements towards the V-groove. The blocks 7, 8, the holders 5, 6 and the grindingelements 2, 3 are mounted on a base 11.
    In this connection it shall be noted that the movement of the knife during grinding,thanks to the spring-biased mounting of the grinding elements, can be composed ofboth horizontal and vertical components of directions, such that the knife describesan oscillating motion when seen in a vertical view.
    The grinder apparatus 1 may be arranged for adjustment of the opening angle d, ifappropriate. To this purpose the grinding elements, holders and blocks may bejournalled on a pivot 12 and associated With wedges 13 and 14 that control theangular positon and intermediate angle d between the first and second sets ofgrinding elements.
    The grinding elements 2, 3 are pivotally supported in the respective holders 5 and6. More precisely, the grinding elements are arranged for pivoting movement aboutaxes R and R' which follow the directions of the front faces 15 of the subjectgrinding elements. In other words, the pivot axes R, R' follow the directions of thesloping sides of the V-groove, which are defined respectively through the front facesof the grinding elements in the subject set of grinding elements.
    The pivotal mounting of the grinding elements in the holders permit the grindingapparatus to adapt to a knife which is not rectilinearly inserted in the V-groove. Asillustrated in Fig. 2, the pivotally supported grinding elements adjust their positionwith respect to the knife's orientation such that full contact with the active abrasiveportions of the grinding elements, in Fig. 2 indicated through shadowed areas in thefront faces 15, can be achieved throughout the grinding procedure.
    The invention can be realized in several embodiments.
    In one embodiment shown in Fig. 3 the grinding element comprises a plate member16 with an abrasive coating 17 applied to its substantially planar front face. Theplate member 16 is an elongate element, wherein the longitudinal sides are sweptback and inwards to produce engagement lugs 18 which may be extended the wholelength of the grinding element. The lugs 18 are movably received in recesses 19which are formed in the opposite sides that adjoin the forward end 20 of the holder.The lugs 18 and recesses 19 in mutual engagement limit a sideways tiltingmovement of the grinding element, which rests with its rear face 21 against thecurved forward end of the holder. The lugs 18, recesses 19 and the forward end 20of the holder may be circular in shape as illustrated to permit the grinding elementa pivoting movement about the pivot axis R (R') with respect to the holder. Theembodiment of Fig. 3 may comprise a metal plate coated with an abrasive material,or a shaped plastic plate which is metallized and then coated with an abrasivematerial, such as diamond e.g.
    In another embodiment shown in Fig. 4 the grinding element is a press-shapedbody 22 having a planar or substantially planar front, two sides 23 and 24connecting the front face with a rear face 25. A ridge 26 which partially has acircular sectional profile protrudes above the rear face and runs centrally along therear face 25. The ridge 26 is pivotally received in a groove 27 of correspondingsectional profile, the groove 27 opening towards the body in the forward end 28 ofthe holder. In mutual engagement, the ridge 26 and the groove 27 provide acoupling means 26, 27 through which the body is hinged to the holder for pivotingmovement about the pivot axis R (R'). At least one of the rear face 25 and theforward end 28 of the holder comprises surfaces which are sloping from the ridge orgroove respectively, at an obtuse angle ß, in order to permit a sideways tiltingmovement of the grinding element relative to the holder. The embodiment of Fig. 4may comprise a press-shaped ceramic or powder-metallic body, e.g.
    The individually pivoting grinding elements of the present invention, as well as theindividually spring biased grinding elements of prior art, are each examples ofadvantageous improvements in grinder/polisher apparatuses intended for thetreatment of a knife's cutting edge. Simultaneously applied these features provide acombination which is extremely forgiving in respect of the orientation of the knifeduring grinding.
    权利要求:
    Claims (15)
    [1] 1. A grinder/polisher apparatus comprising first and second sets of grindingelements (2, 3) facing each other under an angle (o) thus forming between the setsof grinding elements a V-groove in which the cutting edge of a knife is insertable formovement upon grinding, wherein the grinding elements are supported in holders(5, 6), characterized in that the grinding elements (2, 3) are pivotally arranged in theholders (5, 6) about axes (R, R') the inclinations of which correspond with the opening angle (o) of the V-groove.
    [2] 2. The apparatus of claim 1, wherein the grinding elements (2, 3) are pivotallyarranged in a forward end (20, 28) of the holders (i.e. the end facing the V-groove)about axes (R, R') that are parallel or nearly parallel to the front faces (15) of the grinding elements (2, 3).
    [3] 3. The apparatus of claim 1 or 2, wherein the grinding element (2, 3) has a grindingfront face (15) and a rear face (25) comprising coupling means (26, 27)by which the grinding element is pivotally hinged to the holder (5, 6).
    [4] 4. The apparatus of claim 3, wherein the coupling means is a ridge (26) with apart-circular sectional profile running in the length direction of the grindingelement, the ridge pivotally received in a corresponding profile of a groove (27) formed in a forward end of the holder.
    [5] 5. The apparatus of claim 4, wherein at least one of the rear face (25) of thegrinding element and the forward end (28) of the holder is formed with surfaceswhich are sloping at an obtuse angle (ß) away from the ridge (26) or from the groove (2 7) respectively.
    [6] 6. The apparatus of any of claims 1-5, wherein the grinding element is a press-shaped body (22).
    [7] 7. The apparatus of claim 1 or 2, wherein the grinding element has a grinding frontface (15) and a rear face (21) riding on a curved or partially circular forward end(20) of the holder.
    [8] 8. The apparatus of claim 7, wherein longitudinal sides of the grinding element areformed with a lug (18) respectively which movably engages a recess (19 formed ineach side flank that adjoins the forward end (20) of the holder, wherein the lug (18)and recess (19) in mutual engagement control a sideways tilting movement of the grinding element with respect to the holder.
    [9] 9. The apparatus of claim 8, wherein the lug (18) and recess (19) are extended the length of the grinding element.
    [10] 10. The apparatus of any of claims 6-9, wherein the grinding element is an abrasive coated plate member (16).
    [11] 1 1. The apparatus of any previous claim wherein the grinding elements of the firstand second sets of grinding elements are individually biased by separate springs (9, 10) towards the other set of grinding elements.
    [12] 12. A grinding element (2, 3), for a grinder/polisher apparatus that comprises firstand second sets of grinding elements facing each other under an angle (d) thusforming between front faces (15) of the grinding elements a V-groove in which thecutting edge of a knife is insertable for movement upon grinding, wherein thegrinding element is supported in a holder (5, 6), the grinding element characterizedin that it is pivotally arranged in the holder about an aXis (R, R') the inclination of which corresponds with the inclination of the front face (15) of the grinding element.
    [13] 13. The grinding element of claim 12, comprising a press-shaped body (22) having aplanar or substantially planar front face (15), two sides 23, 24) connecting the frontface with a rear face (25), a ridge (26) having a part-circular sectional profile thatprotrudes above the rear face and runs along the longitudinal center of the rear face.
    [14] 14. The grinding element of claim 13, wherein the rear face comprises two parallelsurfaces sloping at an obtuse intermediate angle (ß) away from the ridge (26) towards the sides of the press-shaped body.
    [15] 15. The grinding element of claim 12, comprising a plate member (16) having aplanar or substantially planar and abrasive coated front face (15), the longitudinalsides of the plate member swept back and inwards to produce engagement lugs (18)extended the length of the plate member.
    类似技术:
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    US483042A|1892-09-20|Tool-rest for grinding-machines
    同族专利:
    公开号 | 公开日
    US20180178352A1|2018-06-28|
    SE539499C2|2017-10-03|
    EP3297789B1|2021-11-10|
    US10850369B2|2020-12-01|
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    EP3297789A1|2018-03-28|
    WO2016186567A1|2016-11-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US4624079A|1985-04-29|1986-11-25|Bonapace Mario J|Knife sharpener|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550652A|SE539499C2|2015-05-21|2015-05-21|A grinder / polisher apparatus and a grinding element for that|SE1550652A| SE539499C2|2015-05-21|2015-05-21|A grinder / polisher apparatus and a grinding element for that|
    PCT/SE2016/050470| WO2016186567A1|2015-05-21|2016-05-20|A grinder/polisher apparatus and a grinding element therefor|
    EP16796841.1A| EP3297789B1|2015-05-21|2016-05-20|A grinder/polisher apparatus and a grinding element therefor|
    US15/580,547| US10850369B2|2015-05-21|2016-05-20|Grinder/polisher apparatus and a grinding element therefor|
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