EP0897330B1 - Keramische klinge - Google Patents
Keramische klinge Download PDFInfo
- Publication number
- EP0897330B1 EP0897330B1 EP97924879A EP97924879A EP0897330B1 EP 0897330 B1 EP0897330 B1 EP 0897330B1 EP 97924879 A EP97924879 A EP 97924879A EP 97924879 A EP97924879 A EP 97924879A EP 0897330 B1 EP0897330 B1 EP 0897330B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- upper edge
- blade according
- ceramic
- blades
- 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 - Lifetime
Links
- 239000000919 ceramic Substances 0.000 title claims description 12
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 description 9
- 230000007704 transition Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B9/00—Blades for hand knives
Definitions
- the invention relates to a ceramic blade of a cutting tool, especially a knife, according to the preamble of Claim 1 (see US-A-5 077 901).
- blades of a cutting tool in particular of a knife, almost exclusively steel blades available. They have a cutting edge that is in two side faces passes, and have opposite to the cutting edge an upper edge. Furthermore, fasteners are usually in Form of tabs or the like with which the Attachment to a handle or handle is possible. In case of Pocket knives a hole is provided, which from a in Handle anchored peg is interspersed so that the blade is designed foldable.
- the upper edge of the blade is designed as a flat surface and kept relatively wide, so over the index finger or through Laying on the palm of the user exerted force from above and pressed the cutting edge into the material to be cut and / or can be pulled through. Towards the side surfaces the transition is sharp-edged.
- Cutting tools are now also occasionally on the market available in the form of knives, the blades of which are made of a ceramic Material. Compared to the one described at the beginning Steel blades have the advantage of a higher one Wear resistance, which results in a much higher Lifespan is reflected. Regrinding or resharpening is not necessary for normal use.
- These ceramic blades differ in their geometric design not of conventional steel blades, whose shape has been kept unchanged.
- US-A-3 035 344 publishes a knife blade made of plastic, aluminum or steel with a rounded top edge.
- the invention was therefore based on the object, a ceramic To further develop the blade of the type mentioned at the beginning that it no longer has the disadvantages described. In particular, it should be ensured that they are largely is insensitive to bending stress and therefore an early failure due to bending fracture largely is avoided.
- the invention is based on the idea of the top edge of the blade to be rounded off to the side surfaces. Contrary to that usually usual approach, due to the risk of bending It was shown to decrease the thickness of the blade surprisingly, that already comparatively small radii are sufficient to avoid the risk of bending at a constant thickness significantly reduce.
- the effect should be in are essentially based on the fact that when the blade is sintered, tensions, which is unavoidable in the previous sharp-edged version are can be significantly reduced. This Tensions are responsible for the bending stresses found cracks.
- a further improvement in the mechanical properties results provided the blade is injection molded is.
- This method ideally allows one homogeneous structure structure, even with more complex shapes and when the cross section varies, for example in Area of the top that can be adhered to. It can also Shaping the green body with such precision, that post-processing after sintering is not more is needed. This applies in particular to the Cutting edge that needs no further treatment. Specifically this aspect is of great importance as it is known for ceramic materials to break out individual structural grains can come during processing. Furthermore, at of finishing cracks in the grain are induced which the Significantly increase notch sensitivity.
- Oxide ceramics for example aluminum oxide (Al 2 O 3 ) or zirconium oxide (ZrO 2 ), are used in particular as ceramics.
- Aluminum oxide in particular with a high degree of purity (for example higher than 95%), results in a particularly high wear resistance.
- Zirconium oxide on the other hand, is less wear-resistant, but gives the blade a very high degree of elasticity.
- a mixture of aluminum oxide and zirconium oxide that combines both properties has proven to be optimal.
- the blade 1 has a cutting edge 10 which is the lower one Intersection of two opposite side surfaces 14, 16 represents.
- the Side surfaces 14, 16 essentially parallel upwards and each go into one of the two side surfaces 14, 16 interconnecting upper edge 12 over.
- the contour course A largely corresponds to the previous appearance such blades with the difference that at the transition from the upper edge 12 to the respective side surfaces 14, 16 a radius 18 is formed.
- the radius here is very chosen small, so that the upper edge 12 is still largely even (and horizontal in the illustrated embodiment gradient) is designed.
- the contour course B has the shape of a semi-ellipse, whereby the large semiaxis, the two side surfaces 14, 16 at right angles cuts.
- the contour course D is also a semi-ellipse, whereby however, in contrast to the contour course B, the small semi-axis intersects the two side surfaces 14, 16 at right angles.
- the contour course C is a semicircle and represents on the mechanical properties on the one hand and the handling on the other hand, an optimal compromise by the user represents.
- the contour of the semicircle C represents the maximum possible Radius represents that can be realized. Starting from one The transition to the vertex of the Top edge 12 and the subsequent return area to opposite side surface with constant curvature, so that the stresses occurring during the sintering process ideally distribute evenly.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Knives (AREA)
- Compositions Of Oxide Ceramics (AREA)
Description
Claims (7)
- Keramische Klinge eines Schneidwerkzeugs, insbesondere eines Messers, mit einer Schneide (1), die in zwei Seitenflächen übergeht, und einer gegenüberliegend zur Schneide verlaufenden Oberkante, dadurch gekennzeichnet, daß die Oberkante (12) zu den Seitenflächen (14, 16) hin abgerundet ist.
- Klinge nach Anspruch 1, dadurch gekennzeichnet, daß die Oberkante (12) vorzugsweise zu beiden Seiten unter Bildung eines Radius (18) in die Seitenflächen (14, 16) der Klinge (1) übergeht.
- Klinge nach Anspruch 2, dadurch gekennzeichnet, daß der Radius (18) größer als 0,3 mm, vorzugsweise größer als 0,5 mm, ist.
- Klinge nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Oberkante (12) im Querschnitt die Form einer Halbellipse (B; D) besitzt.
- Klinge nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Oberkante (12) im Querschnitt die Form eines Halbkreises (C) besitzt.
- Klinge nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie im Spritzgießverfahren hergestellt ist.
- Klinge nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Keramik eine Oxidkeramik, vorzugsweise Aluminiumoxid, Zirkonoxid oder ein Gemisch hiervon ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19618803 | 1996-05-10 | ||
DE19618803A DE19618803C2 (de) | 1996-05-10 | 1996-05-10 | Keramische Klinge |
PCT/DE1997/000959 WO1997043095A1 (de) | 1996-05-10 | 1997-05-07 | Keramische klinge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0897330A1 EP0897330A1 (de) | 1999-02-24 |
EP0897330B1 true EP0897330B1 (de) | 2000-03-08 |
Family
ID=7793909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97924879A Expired - Lifetime EP0897330B1 (de) | 1996-05-10 | 1997-05-07 | Keramische klinge |
Country Status (5)
Country | Link |
---|---|
US (1) | US6151786A (de) |
EP (1) | EP0897330B1 (de) |
DE (2) | DE19618803C2 (de) |
ES (1) | ES2144314T3 (de) |
WO (1) | WO1997043095A1 (de) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19811195B4 (de) | 1998-03-09 | 2007-03-01 | Sternplastic Hellstern Gmbh & Co. Kg | Keramisches Besteckteil sowie Verfahren zu dessen Herstellung |
FR2790516B1 (fr) | 1999-03-01 | 2001-05-11 | Renault | Procede de commande d'un moteur a combustion interne |
DE19951587C2 (de) * | 1999-10-27 | 2003-05-28 | Daimler Chrysler Ag | Werkzeug zum scherenden Trennen von Halbzeugen |
AU2002305204A1 (en) * | 2001-04-17 | 2002-10-28 | Lazorblades, Inc. | Ceramic blade and production method therefor |
AT5545U1 (de) | 2001-09-13 | 2002-08-26 | Technoplast Kunststofftechnik | Vorrichtung zum spanlosen trennen von kunststoffprofilen |
GB0127083D0 (en) * | 2001-11-10 | 2002-01-02 | P W Allen & Company Ltd | Device for breaking glass |
RU2314905C2 (ru) | 2002-03-11 | 2008-01-20 | Бектон, Дикинсон Энд Компани | Способ изготовления хирургических лезвий (варианты) |
US6739991B1 (en) | 2002-06-18 | 2004-05-25 | Byron G. Wardropper | Method and apparatus for making a ceramic arrowhead blade |
DE20306990U1 (de) * | 2003-05-05 | 2003-07-10 | at-design Büro für Produktdesign, 91054 Erlangen | Anspitzer für Schreib-, Zeichen und Kosmetikstifte |
US20040255473A1 (en) * | 2003-06-17 | 2004-12-23 | Walton Darren Lamoyne | Thin back knife |
WO2005027728A2 (en) | 2003-09-17 | 2005-03-31 | Becton, Dickinson And Company | Method for creating trenches in silicon wafers using a router |
TWI282299B (en) * | 2004-09-23 | 2007-06-11 | Ind Tech Res Inst | Ceramic blade and fabrication method thereof |
US20080066320A1 (en) * | 2005-06-17 | 2008-03-20 | Delaney Dewey R Sr | Flooring Material Cutting Device |
US20130014396A1 (en) * | 2011-07-14 | 2013-01-17 | Kenneth James Skrobis | Razor blades having a wide facet angle |
CN103302681A (zh) * | 2012-03-08 | 2013-09-18 | 黄大英 | 陶瓷刀具及其制造方法 |
US9662796B2 (en) * | 2012-04-26 | 2017-05-30 | Thomas Scimone | Ceramic cutting blades |
CN104647408A (zh) * | 2015-02-28 | 2015-05-27 | 苏州圣艺文体用品有限公司 | 一种多变水果刀 |
US11230025B2 (en) | 2015-11-13 | 2022-01-25 | The Gillette Company Llc | Razor blade |
US11654588B2 (en) * | 2016-08-15 | 2023-05-23 | The Gillette Company Llc | Razor blades |
CN106695910B (zh) * | 2017-03-22 | 2018-06-12 | 涿州皓原箔业有限公司 | 一种用于铝箔生产的压花切块一体机 |
US10814508B1 (en) | 2017-07-26 | 2020-10-27 | Bredan, Inc. | Razor |
US11135731B2 (en) * | 2017-12-23 | 2021-10-05 | Slice, Inc. | Cutting device having a locking member |
US10889013B2 (en) * | 2019-01-03 | 2021-01-12 | Slice, Inc. | Cutting device |
US11104013B2 (en) * | 2019-01-03 | 2021-08-31 | Slice, Inc. | Cutting device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR478248A (fr) * | 1914-08-04 | 1915-11-29 | Titus Andrew Beecher | Perfectionnements aux lames de couteaux |
US2279833A (en) * | 1941-08-01 | 1942-04-14 | Edward K Madan | Knife |
US2566112A (en) * | 1949-02-09 | 1951-08-28 | W R Case & Sons Cutlery Co | Knife blade construction |
US3035344A (en) * | 1960-06-17 | 1962-05-22 | Edward G Brown | Slicing knife |
US3252219A (en) * | 1964-07-20 | 1966-05-24 | Fuji Shokuhin Company Ltd | Knife |
US3543402A (en) * | 1968-04-15 | 1970-12-01 | Coors Porcelain Co | Ceramic cutting blade |
DE3538169A1 (de) * | 1985-10-26 | 1987-04-30 | Licentia Gmbh | Trennmesser |
US5077901A (en) * | 1990-05-18 | 1992-01-07 | Warner Joseph A | Ceramic blades and production methodology therefor |
DE4040229A1 (de) * | 1990-12-15 | 1992-06-17 | Rennebeck Klaus | Keramikklinge oder -wetzstein |
-
1996
- 1996-05-10 DE DE19618803A patent/DE19618803C2/de not_active Expired - Fee Related
-
1997
- 1997-05-07 ES ES97924879T patent/ES2144314T3/es not_active Expired - Lifetime
- 1997-05-07 EP EP97924879A patent/EP0897330B1/de not_active Expired - Lifetime
- 1997-05-07 US US09/180,545 patent/US6151786A/en not_active Expired - Fee Related
- 1997-05-07 DE DE59701223T patent/DE59701223D1/de not_active Expired - Lifetime
- 1997-05-07 WO PCT/DE1997/000959 patent/WO1997043095A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO1997043095A1 (de) | 1997-11-20 |
US6151786A (en) | 2000-11-28 |
DE19618803A1 (de) | 1997-11-13 |
ES2144314T3 (es) | 2000-06-01 |
DE19618803C2 (de) | 1998-09-03 |
DE59701223D1 (de) | 2000-04-13 |
EP0897330A1 (de) | 1999-02-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0897330B1 (de) | Keramische klinge | |
DE3700250C2 (de) | ||
DE69428157T2 (de) | Verfahren und Vorrichtung zum Schärfen von Messern | |
DE10047212A1 (de) | Sägeblatt | |
DE102006001816A1 (de) | Sägeblatt mit einem Grundkörper und Zähnen mit einer Schneide mit einer Verschleißschutzschicht | |
DE4142880C2 (de) | Sägeblatt | |
EP1030763B1 (de) | Band- oder gattermesser | |
DE3114687A1 (de) | Schneidblatt | |
EP2527102B1 (de) | Messer und Schneideinrichtung sowie Verfahren zum Schneiden | |
EP1329151B1 (de) | Heckenschere | |
EP3406781A1 (de) | Greifer für eine tuftingmaschine | |
EP1510303B1 (de) | Messer | |
DE202005010515U1 (de) | Vorrichtung zur abtragenden Behandlung von Hornhaut | |
EP1203639A2 (de) | Handwerkzeug zum Abheben von Material | |
DE2254647B2 (de) | Saegezahnglied fuer eine saegekette | |
DE2619485A1 (de) | Kolbenring mit einer chrom-gefuellten nut und verfahren zu seiner herstellung | |
EP0810337A2 (de) | Fugenspachtel | |
EP1752119A1 (de) | Schneidklingenhalter für eine mikrochirurgische Schneidanordnung, insbesondere eine solche für die refraktive Augenchirurgie | |
CH523750A (de) | Schneidmesser | |
DE3300106A1 (de) | Verfahren zur herstellung von bandstahlmessern zur verwendung als einwegmesser in hobelmaschinen | |
DE2344806C3 (de) | Kunststoff messer | |
DE20117786U1 (de) | Hufraspel | |
EP0255617B1 (de) | Sägeblatt für Holz- und Kunststoffzerspanung | |
DE202010006588U1 (de) | Wetzstahl | |
DE29616705U1 (de) | Werkzeug für eine elektrisch betriebene Hubsägemaschine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19980918 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE ES FR GB IT LI |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
17Q | First examination report despatched |
Effective date: 19990806 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE ES FR GB IT LI |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: DIPL.-ING. ETH H. R. WERFFELI PATENTANWALT Ref country code: CH Ref legal event code: EP |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20000308 |
|
REF | Corresponds to: |
Ref document number: 59701223 Country of ref document: DE Date of ref document: 20000413 |
|
ITF | It: translation for a ep patent filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2144314 Country of ref document: ES Kind code of ref document: T3 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010606 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010606 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20021015 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20021017 Year of fee payment: 6 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20021024 Year of fee payment: 6 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030507 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030508 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030507 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040130 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030508 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050507 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20100624 Year of fee payment: 14 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59701223 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59701223 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20111130 |