EP1504847A1 - Dispositif d'aiguisage de lames de couteaux et unité de restauration du bord de coupe - Google Patents

Dispositif d'aiguisage de lames de couteaux et unité de restauration du bord de coupe Download PDF

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Publication number
EP1504847A1
EP1504847A1 EP04445077A EP04445077A EP1504847A1 EP 1504847 A1 EP1504847 A1 EP 1504847A1 EP 04445077 A EP04445077 A EP 04445077A EP 04445077 A EP04445077 A EP 04445077A EP 1504847 A1 EP1504847 A1 EP 1504847A1
Authority
EP
European Patent Office
Prior art keywords
sharpening
wall
base
slot
unit
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
Application number
EP04445077A
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German (de)
English (en)
Other versions
EP1504847B1 (fr
Inventor
Mark James Henry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FUERITECHNICS GROUP PTY LTD
Original Assignee
Fueritechnics Pty Ltd
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Filing date
Publication date
Application filed by Fueritechnics Pty Ltd filed Critical Fueritechnics Pty Ltd
Publication of EP1504847A1 publication Critical patent/EP1504847A1/fr
Application granted granted Critical
Publication of EP1504847B1 publication Critical patent/EP1504847B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the present invention relates to a knife sharpening system alternately accommodating different sharpening units and to knife edge restoring units useable independently or as part of said system.
  • Proper sharpening of knives to produce an effective cutting edge can involve several different operations, including in the first instance, shaping or reshaping the edge to present the desired cutting angle, which may differ from one knife to the next or from one knife use to another, and perfecting the edge to a desired degree of fineness or sharpness.
  • Each operation is best performed by a different instrumentality and many such instrumentalities are available on the market. No one instrumentality can reliably perform all of the possible sharpening actions that may be called for.
  • the chef, or even the householder in order to adequately to make provision for all of the various sharpening actions that may be required, must purchase and have available a number of different sharpeners, one for each specifically different sharpening operation, or employ the services of a professional blade sharpener, with varying success. This is not only a significant source of expense but may also call for the acquisition of a range of skills or the utilization of a significant amount of storage space which, particularly for the householder, may not be readily available.
  • a device in which a body having a slot through which a blade may be drawn is provided with angularly related cutting tool edges engaged by the blade as it is pulled through the slot, thereby to form a blade edge with an angular sharpening edge determined by the angular relation between the cutting tool edges across which the blade is drawn.
  • a major drawback of devices of this type is that the cross-sectional angle of the produced edge is invariable, and hence each such device will produce only a single type of blade edge.
  • a mounting structure here generically termed “base”
  • base is provided to which different knife sharpening units are interchangeably attachable, so that only one base need be provided for an edge forming or restoring unit, an edge sharpening unit, and/or an edge honing unit, each unit being readily associated with or disassociated from the base.
  • the base is preferably provided with safety features effective no matter which type of sharpening unit may be employed at a given time, those safety features including the handle extending out from the base so that when the user grasps the handle his hand is relatively remote from the knife blade being manipulated, the handle preferably being moveable when the unit is not in use to a position relatively snug against the base, thereby minimizing storage space.
  • the base may be provided with a guard located between the handle and the sharpening unit when in position on the base, thus providing further assurance that an errant blade will not accidentally cut the user's hand.
  • the blade edge former or restorer here disclosed which may if desired be a self-contained unit apart from its utility as an interchangeable unit of the system here disclosed, is, as is conventional, provided with a pair of angularly related cutting tool edges across which a knife may be pulled to form or restore its cutting edge.
  • those cutting tool elements are adjustably mounted on the unit for positioning in a plurality of fixed angular positions so as to render the device capable of forming or restoring knife edges with different cross-sectional angles.
  • those cutting elements are mounted on the device so that when tightened to the device they engage physical stops such as notches which control their relative angular position but from which, when loosened, they may be moved from one stop to another, or rotated or replaced when wom.
  • the basic element of the knife sharpening system of the present invention is the base generally designated 2, the details of which are best shown in Figs. 3 and 4, which comprises a body 4 having a bottom wall 6 adapted to rest on a table-top or any other supporting surface and having a top wall 8 to which a vertical slot 10 opens.
  • the bottom wall 6 is of appreciable area so as to provide a stable support for the body 2.
  • Extending outwardly and downwardly from the body 4 is a wall 12 having an aperture 14, and the handle generally designated 16 is pivotally mounted in the aperture 14, retained there in any appropriate manner, as by C-clip 18.
  • the handle 16 is thus moveable between an extended operative position shown in Figs. 2, 3 and 4 and a stand-by vertical position shown in Fig. 1.
  • the wire guard 20 mounted on the body 4, as by having its bent ends received in apertures in the sides of the body 4, is the wire guard 20, located between the handle 16 and the slot 10, the guard 20 being moveable between a vertical position alongside the handle 16 when the handle is in its vertical stand-by position and to a position between the handle 16 and whichever of the sharpening units may be mounted on the base 2.
  • one such sharpening unit may be the tool generally designated 22 such as that disclosed in our European Patent Application Publication No. 1,329,291 entitled “Knife and Blade Sharpener", which comprises pairs of overlapping, resiliently flexible fingers or strips 24 and 26 which form opposed sharpening or honing faces operable to engage the sides of a knife blade drawn through and between the fingers, the sharpening effect being produced by abrasive or other materials on the knife-engaging surface fingers 24 and 26 all as described in that publication.
  • the fingers 24 and 26 are joined at their lower edges by a downwardly extending strip 28 designed to be received and snugly releasably retained in the slot 10 when that particular sharpening unit 22 is to be used.
  • strip 28 may be provided with lower end apertures or recesses 29 adapted to be engaged by ball bearings or other resilient members 31 in the base 2, thereby reliably retaining the unit 22 in place but permitting its ready removal by hand for replacement with a functionally different unit when that is called for.
  • any type of handle 16 may be employed, either fixed to or articulately mounted on the base 2, the handle functioning to hold the base 2 in place while the user's hand is located a safe distance from where the knife to be sharpened is manipulated.
  • the particular articulate mounting here specifically disclosed is preferred because, as may be seen by comparing Figs. 1 and 2, much space is saved when the system is not in use, and the single pivot method is robust and simple to manufacture.
  • the sharpening unit 22 of Fig. 1 is primarily designed to put a finishing touch on an existing sharp edge.
  • a different type of unit is required to substantially initially form a cutting edge or to restore a cutting edge that has significantly deteriorated.
  • the unit generally designated 30 and shown in Fig. 2 mounted on the base 2 is such a unit. That unit 30 has depending therefrom a downwardly extending strip 28 similar to the strip 28 depending from the unit 22 which is adapted to be similarly received in the base slot 10 when the unit 30 is to be utilized, the strip 28 being provided with apertures or notches 29 cooperating with the ball bearings or other resilient members 31 in base 2, as was the case with unit 22.
  • the unit 30 has a bottom wall 32 from which the strip 28 depends, with a wall 34 extending up from the bottom wall 32 and provided with a downwardly extending open-ended slot 36 adapted to receive a knife blade when the unit is to be used.
  • a wall 34 extending up from the bottom wall 32 and provided with a downwardly extending open-ended slot 36 adapted to receive a knife blade when the unit is to be used.
  • Mounted on a side surface of the wall 34 are overlapping sharpening elements 38 and 40 having edges 42 and 44 respectively which line up to produce a vertex 46 across which the knife to be sharpened is drawn, with the edges 42 and 44 acting on the knife to remove material and produce the desired knife edge shape.
  • Units of this type are known and may, if adapted for mounting on the base 2, be used in accordance with the present sharpening system invention.
  • the unit 30 as here specifically disclosed constitutes, however, a significant improvement over its conventional counterpart. More specifically, each of the cutting tool elements 38 and 40 are individually mounted on a side surface of the wall 34 so as to be adjustably fixed in position, thereby to adjustably vary the angle produced at the vertex 46 and hence the angle of the knife edge that it will produce.
  • each of the abrasive elements 38, 40 may be triangular in shape and provided with through-openings to register with internally threaded openings 50 in the wall 34, and threaded clamping screws 52 pass through the openings in the abrasive elements 38, 40 and are threaded into the openings 50 in order to clamp abrasive elements 38, 40 against the side surface of the wall 34.
  • the desired sharpening angle can be produced. Since the elements 38, 40 overlap, the side surfaces of the wall 32 on which the abrasive elements 38, 40 respectively are mounted must be at different elevations.
  • the face of the wall 32 on which the element 38 is mounted is recessed over the area 54 to a depth approximately that of the thickness of the cutting tool element 40, and the abrasive element 38 is mounted in the area 54 thereby to snugly overlap the abrasive element 40, which is in turn mounted on the unrecessed wall 34 to the left of the slot 36 as viewed in Fig. 2.
  • the inwardly facing edge of that recessed area 54 is provided with a series of notches 56 into which a comer of the triangular sharpening element 38 is adapted to be received
  • the left hand face of the wall 32 on which the abrasive element 40 is mounted may be provided with an upstanding portion 58 the inwardly facing surface of which is provided with notches 56 corresponding to the notches 56 for the abrasive element 40.
  • the left hand face of the wall 32 may be considered as recessed when compared to the face of the upstanding portion 58. Therefore, as shown in Figs.
  • the elements 38, 40 To move the elements 38, 40 from one of their operatively adjustable positions to another one loosens the screws 52 sufficiently so that the abrasive elements 38, 40 can be lifted away from the wall 32 so as to escape from their respective notches, the elements 38, 40 are then rotated so that their pointed tips engage the newly desired notch 45, they are moved back toward the side surface of the wall 32 so that their tips enter the desired notches, and the screws 52 are tightened down to positively retain the elements 38, 40 in their newly adjusted position.
  • the elements 38, 40 are here shown in the preferred form of triangles, and in particular substantially equilateral triangles, they may be readjusted in position so as to present fresh cutting tool edges in the knife sharpening process. To that end it is necessary only to loosen the holding screws 52, rotate the sharpening elements 38, 40 60° to position a new sharpening edge at the vertex 46, engage the sharpening elements 38, 40 with the appropriate notches, and then tighten down the screws 52.
  • the cutting tool elements 38, 40 have been repositioned twice, so that all three edges of each triangle have become worn, the elements may be removed from the wall 32 and interchanged left to right, which in effect presents three new sets of edges for sharpening purposes.
  • the knife sharpening system of the present invention enables the chef, amateur or professional, to keep his collection of knives in top-notch condition, with each knife optimally sharpened, through the selective use of a plurality of sharpening units selectively associated with a single mounting base provided preferably with a handle and preferably with a safety guard functioning effectively with whatever sharpening unit may be mounted on the base. As a result the amount of storage space is minimized, sharpening is optimized and safety is enhanced.
  • the particular sharpening unit here disclosed for optimal initial formation of and ready restoration of a knife edge is provided with sharpening elements which are adjustably positionable to produce knife edges of selectively different sharpness angles.
  • sharpening elements which are adjustably positionable to produce knife edges of selectively different sharpness angles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Knives (AREA)
EP04445077A 2003-07-29 2004-07-23 Dispositif d'aiguisage de lames de couteaux et unité de restauration du bord de coupe Expired - Lifetime EP1504847B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2003903937A AU2003903937A0 (en) 2003-07-29 2003-07-29 Knife and blade sharpener
AU2003903937 2003-07-29

Publications (2)

Publication Number Publication Date
EP1504847A1 true EP1504847A1 (fr) 2005-02-09
EP1504847B1 EP1504847B1 (fr) 2006-09-13

Family

ID=32476228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04445077A Expired - Lifetime EP1504847B1 (fr) 2003-07-29 2004-07-23 Dispositif d'aiguisage de lames de couteaux et unité de restauration du bord de coupe

Country Status (5)

Country Link
EP (1) EP1504847B1 (fr)
AT (1) ATE339277T1 (fr)
AU (1) AU2003903937A0 (fr)
DE (1) DE602004002349T2 (fr)
ES (1) ES2276269T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2455517A (en) * 2007-12-11 2009-06-17 Robert Welch Designs Ltd Combination of a knife storage block and a knife sharpener

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191408361A (en) * 1914-04-02 1914-06-04 Ferdinand Bernhardt Improved Means for Sharpening Knives and the like.
GB517242A (en) * 1938-08-20 1940-01-24 James Chantry Improvements in knife sharpeners
US6393946B1 (en) * 1998-10-17 2002-05-28 Theodore Kenesky Sharpener for single and double-sided blades
US20030075022A1 (en) * 2001-10-18 2003-04-24 Henry Mark James Knife and blade sharpener

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191408361A (en) * 1914-04-02 1914-06-04 Ferdinand Bernhardt Improved Means for Sharpening Knives and the like.
GB517242A (en) * 1938-08-20 1940-01-24 James Chantry Improvements in knife sharpeners
US6393946B1 (en) * 1998-10-17 2002-05-28 Theodore Kenesky Sharpener for single and double-sided blades
US20030075022A1 (en) * 2001-10-18 2003-04-24 Henry Mark James Knife and blade sharpener

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2455517A (en) * 2007-12-11 2009-06-17 Robert Welch Designs Ltd Combination of a knife storage block and a knife sharpener
GB2455517B (en) * 2007-12-11 2012-11-07 Robert Welch Designs Ltd Combination of a knife storage block and knife sharpener

Also Published As

Publication number Publication date
ES2276269T3 (es) 2007-06-16
ATE339277T1 (de) 2006-10-15
DE602004002349D1 (de) 2006-10-26
DE602004002349T2 (de) 2007-05-03
EP1504847B1 (fr) 2006-09-13
AU2003903937A0 (en) 2003-08-14

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