EP0429035B1 - Couteau à mitre en matériau sintré - Google Patents

Couteau à mitre en matériau sintré Download PDF

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Publication number
EP0429035B1
EP0429035B1 EP90122067A EP90122067A EP0429035B1 EP 0429035 B1 EP0429035 B1 EP 0429035B1 EP 90122067 A EP90122067 A EP 90122067A EP 90122067 A EP90122067 A EP 90122067A EP 0429035 B1 EP0429035 B1 EP 0429035B1
Authority
EP
European Patent Office
Prior art keywords
bolster
blade
tang
knife
sintered
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
Application number
EP90122067A
Other languages
German (de)
English (en)
Other versions
EP0429035A3 (en
EP0429035A2 (fr
Inventor
Jürgen E. Wordtmann
Horst Gräfe
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.)
Zwilling JA Henckels AG
Original Assignee
JA Henckels Zwillingswerk AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE8913822U external-priority patent/DE8913822U1/de
Application filed by JA Henckels Zwillingswerk AG filed Critical JA Henckels Zwillingswerk AG
Publication of EP0429035A2 publication Critical patent/EP0429035A2/fr
Publication of EP0429035A3 publication Critical patent/EP0429035A3/de
Application granted granted Critical
Publication of EP0429035B1 publication Critical patent/EP0429035B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B3/00—Hand knives with fixed blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B3/00—Hand knives with fixed blades
    • B26B3/02—Table-knives

Definitions

  • the invention relates to a knife consisting of a leaf, goiter and tang, in which the tang and leaf are welded to opposite flat surfaces of the goiter and consist of steel.
  • Such a knife is known from US-A 689 049 or FR-A 694 520. Both writings describe a knife in which the leaf, bolster and tang are forged separately, possibly made of different materials, and then welded together. Compared to the classic production method - forging a blade consisting of a blade, tang and goiter in one piece - this solution significantly reduces the production costs.
  • the three components have considerable differences in their cross-sectional area, so that in the classic production method the largest cross-sectional area is decisive for the choice of the blank and the shaping of the areas with a smaller cross section is very complex.
  • Reworking such as polishing or the like, is particularly time-consuming because of the often complicated shape.
  • the object of the invention is therefore to design a generic knife in such a way that the manufacture is considerably simplified with the same utility value.
  • a knife is provided in which, due to the precise manufacture of the bolster designed as a sintered part, the bolster has a very high surface quality even without reworking.
  • the fit of plastic handles to be attached later to the sintered part is so good that there is no longer any need for reworking, as is otherwise the case with forged parts.
  • the use of a sintered part offers particular advantages.
  • the function of the goiter as a link between tang and the sheet made of hardened steel is used to advantage here.
  • compression occurs on the sintered part in the area of the weld due to the high pressure and the heating during flash butt welding. This results in an increase in hardness in the sintered part of a few millimeters.
  • the hardness curve in the entire blade does not change suddenly, but continuously at the goiter / blade transition point.
  • the knife blade here that of a chef's knife, consists of the blade 1, the bolster 2 and the tang 3.
  • Leaf, bolster and tang are each formed as individual parts welded together, the bolster consisting of a sintered part.
  • the bolster 2 has a material accumulation that is several times the leaf thickness.
  • the thickness of the bolster tapers in the direction of section 5 via a concave groove 6.
  • the profile of this section 5 corresponds to that of blade 1 and thus forms a flat blade attachment surface 5 '.
  • the approach 5 of the bolster 2 tapers in a wedge shape in the direction of the cotton wool 1 '.
  • the bolster is also designed symmetrically, the bolster thickening in the direction of the alve attachment surface 5 ′′ via said concave groove 6 to a multiple of the blade thickness to the flat alder attachment surface 5 ′′.
  • the tang 3 is butt-connected to the bolster by means of fusion welding, perpendicular to the plane tang surface 5 '' of the bolster.
  • the hardness curve of the material of a blade formed in this way is plotted in FIG. 6. While the leaf is made of hardened material, goiter and tang are made of softer material. At the welding point A, where the blade and bolster are connected to one another, the sintered material of the bolster has a higher hardness in the range of a few millimeters. The reason for this increase in hardness is the flash butt welding process used. The sintered material is compressed due to the pressure exerted in this process and the heating in the area of the weld. In this area, the hardness increases continuously from the crop to the leaf. Goiter and tang on the welded joint B show a slight increase in hardness, the tang being hardened in a larger area than the goiter. Due to the high accuracy of fit of the sintered bolster and stitching body, it is not necessary to rework the bolster. Only the connection between bolster and blade on weld A requires reworking.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Claims (1)

  1. Couteau composé d'une lame (1), d'une mitre (2) et d'une soie (3), dans lequel la soie et la lame sont soudées sur des surfaces de plan opposées de la mitre et sont faites en acier, caractérisé par une mitre (2) en acier fritté, présentant une dureté à peu près égale à celle du matériau de la soie (3) et d'une dureté inférieure à celle du matériau de la lame, cette mitre présentant un profil de dureté continu dans la zone de transition, entre la mitre (2) et la lame (1), et le point de liaison par soudure entre lame et mitre étant une liaison par soudure par étincelage bout à bout.
EP90122067A 1989-11-23 1990-11-19 Couteau à mitre en matériau sintré Expired - Lifetime EP0429035B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE8913822U 1989-11-23
DE8913822U DE8913822U1 (de) 1989-11-23 1989-11-23 Messer mit Kropf als Sinterteil
DE9014912U 1990-10-29
DE9014912U DE9014912U1 (de) 1989-11-23 1990-10-29 Messer mit Kropf als Sinterteil

Publications (3)

Publication Number Publication Date
EP0429035A2 EP0429035A2 (fr) 1991-05-29
EP0429035A3 EP0429035A3 (en) 1991-10-02
EP0429035B1 true EP0429035B1 (fr) 1993-05-12

Family

ID=25955556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122067A Expired - Lifetime EP0429035B1 (fr) 1989-11-23 1990-11-19 Couteau à mitre en matériau sintré

Country Status (4)

Country Link
US (1) US5131152A (fr)
EP (1) EP0429035B1 (fr)
DE (2) DE9014912U1 (fr)
ES (1) ES2041105T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7228632B2 (en) * 2002-05-31 2007-06-12 Calphalon Corporation Cutlery implement
US20040123471A1 (en) * 2002-08-07 2004-07-01 Onion Kenneth J. Ergonomic knife
US7322113B2 (en) * 2004-12-03 2008-01-29 Calphalon Corporation Cutlery implement and block
US20060117576A1 (en) * 2004-12-03 2006-06-08 Calphalon Corporation Cutlery implement
DE102005005640A1 (de) 2005-02-05 2006-09-14 Zwilling J. A. Henckels Ag Messer mit stauchgeschmiedetem Messerkropf
US20060207110A1 (en) * 2005-03-03 2006-09-21 Kyocera Corporation Ceramic cutting knife
WO2010138753A1 (fr) * 2009-05-27 2010-12-02 Wki Holding Company Inc. Article de coutellerie ayant une ergonomie améliorée de saisie
US8839524B2 (en) * 2010-10-01 2014-09-23 Dwaine Owens Scraper chef knife
CN104191420B (zh) * 2014-08-19 2016-05-04 李有维 刀柄以及该刀柄与刀体的焊接方法
US10350770B1 (en) * 2018-03-11 2019-07-16 Evergood Hardware Products Co., Ltd. Pattern knife assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US689049A (en) * 1901-08-07 1901-12-17 Isaac Hirsch Table-cutlery.
FR392047A (fr) * 1908-07-06 1908-11-16 J Delaire Et Fils Soc Nouvelle fabrication des lames de couteaux avec mitres ou bascules, au moyen de la soudure autogène
FR694520A (fr) * 1930-04-25 1930-12-04 Couteau
FR727607A (fr) * 1931-12-03 1932-06-21 Procédé de fabrication de couteaux et couteau obtenu par ce procédé
JPS5428823B2 (fr) * 1974-01-25 1979-09-19
DE2526589A1 (de) * 1975-06-13 1976-12-30 Eickhorn Rolf Juergen Dipl Wir Verfahren zum herstellen von messern mit hohlem griff und danach hergestelltes messer

Also Published As

Publication number Publication date
DE59001443D1 (de) 1993-06-17
ES2041105T3 (es) 1993-11-01
EP0429035A3 (en) 1991-10-02
EP0429035A2 (fr) 1991-05-29
US5131152A (en) 1992-07-21
DE9014912U1 (de) 1991-03-28

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