EP0452455A1 - Manche de couteau - Google Patents

Manche de couteau

Info

Publication number
EP0452455A1
EP0452455A1 EP90916531A EP90916531A EP0452455A1 EP 0452455 A1 EP0452455 A1 EP 0452455A1 EP 90916531 A EP90916531 A EP 90916531A EP 90916531 A EP90916531 A EP 90916531A EP 0452455 A1 EP0452455 A1 EP 0452455A1
Authority
EP
European Patent Office
Prior art keywords
handle
seen
head portion
finger
rest
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.)
Ceased
Application number
EP90916531A
Other languages
German (de)
English (en)
Inventor
Bertus Johannes Reitsma
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0452455A1 publication Critical patent/EP0452455A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/102—Handle constructions characterised by material or shape the shape being specially adapted to facilitate handling or improve grip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B1/00—Hand knives with adjustable blade; Pocket knives
    • B26B1/10—Handles
    • 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

Definitions

  • the invention relates to a handle for a knife blade extending therefrom in a cantilever fashion, comprising a handle body having a head portion, the thickness of which is increasing as seen from the blade insert end, an intermediary portion connected therewith and a tail portion, wherein in use - i.e. with the knife positioned edgewise - the upwardly facing of the head portion surface and an inimediately contiguous part of the intermediary portion are sloping rearwardly so as to function as a rest for a finger tip, and wherein on both of the opposite sides of the intermediary portion - immediately adjacent the transition lines to the head portion- concavely profiled finger rests are formed.
  • Such a handle is known from EP-A-90256.
  • a handle for relatively short knife blades is involved here, of the type, which is commonly used both by professionals and by do it yourself people for cutting and severing e.g. floor covering or roofing material, leather or other material.
  • This well-known handle has been merely designed for use in the so-called fist grip, whereby the handle body is firmly enclosed in the palm of the hand and 'whereby additional pressure may be applied on the upper face of the head portion of the handle body by means of either the index finger or the thumb.
  • the proposal disclosed in the above mentioned patent specification aims at improving the handle for such a knife in ergonomic respect and more specifically in the sense that in use the grip will be less convulsive.
  • the handle is symmetrically formed, so that no distinction is to be made between handles for right hand use and left hand use respectively.
  • the invention more particularly relates to a handle for a very special type of knife, viz. a knife, with which the magnitude of the force to be exerted during use is of minor irrportance, but instead the "steering" of the knife and also the cautious “dosage” of the force to be applied is of utmost i_mportance.
  • a handle for a very special type of knife viz. a knife
  • the magnitude of the force to be exerted during use is of minor irrportance, but instead the "steering" of the knife and also the cautious “dosage” of the force to be applied is of utmost i_mportance.
  • the invention is related to the usual operating knife in the operative surgery, a so-called scalpel, which in the presently known embodiments have a relatively flat handle, lying in the plane of the blade.
  • this objective is achieved in that the head portion - as seen in plan view - has a triangular form with a relatively small apex angle, whereas the sidewalls of the head portion are tapering downwardly into a common edge, which extends from the blade insertion end obliquely downwardly and rearwardly, whereas that part of the middle portion which confines the two finger grip impressions is tapering downwardly as seen in a vertical cross section, and wherein the top surface, profiled as a finger tip rest, is sloping slightly downwardly from the right hand side to the left hand side when seen transversely.
  • the handle accor ⁇ ding to the present invention has a relatively pointy head portion, in which an accur tely defined supporting surface for the index finger is provided. Due to the fact that this supporting surface is sloping slightly downwardly as seen transversely, the (slight) pressure of the finger onto this supporting surface will have a component directed to the thumb side, which releaves the middle finger.
  • the handle of the invention may be "loosely" and yet stably held in the hand both in the overhand grip (wherein the handle is enclosed in the palm of the hand) and in the so-called penhold grip. In this way an operating knife may be steered by the index finger in a sensitive manner, thereby enabling an accurate dosage of the force to be exerted on and with the knife.
  • a particular advantage of the handle of the invention is to be seen in the possibility of selecting between two different "penhold grips", viz.
  • a penhold grip whereby the middle finger is - in a rather stretched attitude - bearing laterally against the right hand side of the head portion of the handle body, and a penhold grip, whereby the middle finger is bearing laterally - in a more curved attitude- against the handle body onto the respective finger rest at a location just behind the transition to the inter-mediary handle portion.
  • the two penhold grips are of equal value from an ergonomic point of view. In practice the choice between the two possibilities will e.g. be determined by the type of the action to be performed. As an example the first mentioned possibility is to be recommended when an incision has to be made, whereas the second possibility will be selected when "preparing" the incision site.
  • DE-A-2729749 discloses a penholder, in the generally torpedo—shaped holder body of which recesses are provi ⁇ ded for thumb, index finger and middle finger.
  • the finger grip recesses are formed such, that they fix the penholder in a certain angular position with respect to the holding hand. Consequent ⁇ ly such a holder would not be readily steerable in the plane of a knife to be fixed to it.
  • the choice between two different penhold grips which is essential in the handling of a surgery scalpel, does not exist here.
  • the left side of the intermediary portion is concavely profiled such that the surface of it, as seen with the handle in its upright position, is formed by a part of a .substantially vertical cylindrical plane, which may function as a rest for a horizontally and edgewise positioned thumb.
  • Fig. 1 and 2 show side elevations from both sides of the handle of this invention, as used with an operating knife, and seen from above in a slightly oblique direction
  • fig. 3 is a plan view of the knife of fig. 1-2.
  • an operating knife consists of the proper knife or blade 1 ' and is provided with a handle 2 ac_xx_»rding to the invention.
  • the handle 2 has an asymmetrical profile, which means that it is asymmetrically formed relative to the plane of the blade 1, so that for practical use the handle will have to be provided in two versions, viz. one for right hand use and one for left hand use.
  • the drawing shows the version for right hand use. This means, that fig. 1 .shows the thumb side and fig. 2 shows the middle finger side of the handle.
  • the handle body is formed e.g. of a suitable plastics material and comprises a head portion 3, the horizontal cross-section of which having a thickness which gradually increases as seen from the forward or blade insert end 4 in the direction of the rear end 5; as a result this head portion 3 has a substantially triangular shape as seen in plan view. In a vertical cross-sectional plane the head portion 3 has a form which slightly tapers downwardly.
  • the head portion 3 is connec ⁇ ted to a middle portion 6, the thickness of which is first decreasing and then gradually increases.
  • the transition lines between the head portion 3 and the middle portion 6 are indicated at 7 on the thumb side (fig. 1) and 8 on the middle finger side (fig. 2) respectively.
  • the side faces of the middle portion 6 are .shaped such that on the thumb side a well fitting rest is obtained for a horizontally extending thumb put on its side.
  • This rest (fig. 3) is - when considering the handle in its upright position (as in fig. l and 2)- ⁇ mposed of a part 9 of a substantially upright positioned cylindrical surface.
  • a slightly concavely formed rest 10 is provided in the first section of the respective sidewall of the middle portion 6, for contacting the middle finger in a curved, attitude.
  • This rest extends between the substantially vertically downwardly extending forward transition line 8 and a rearward transition line 11 which extends obliquely in a downward and rearward direction.
  • the handle body is completed by a tail portion 12, which is tapering in the rearward direction.
  • the transition between the middle portion 6 and the tail portion is indicated at 13 on the thumb side (fig. 1) , whereas the transition on the middle finger side appears in a less pronounced way.
  • the handle portion may extend - on the middle finger side - from the transition line 11 rearwardly substantially straight and parallel to the longitudinal middle plane of the knife.
  • the top face 14 of the head portion 3 is slightly sloping upwardly up to the line 15 (fig. 3) from where the top face of the middle portion is extending substantially horizontally, whereas the top surface of the tail portion 12 is inclined slightly downward- ly. Besides the top face 14 shows an inclined profile transversely, sloping slightly downwards from the thumb side to the middle finger side.
  • a slight impression 16 is made in the upper face 14 which functions as a rest for the index finger of the right hand. ' The center of this rest is positioned substantially in line with the transition lines 7 and 8, when seen transversely. Due to the slightly inclined position of the top face 14 containing the finger tip impression 16, the index finger will get resting on the face 14, 16 in a position which is slightly tilted to the right. There is a more or less .spontaneous offer of two different penhold grips.
  • the middle finger will be supported on the face 10 in a curved attitude, as explained hereinabove, whereas in the second penhold grip, the middle finger will, in a more stretched attitude and in side by side contact with the i_ndex finger, support on the slightly concavely profiled sidewall 17 of the head portion.

Landscapes

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

Abstract

Le corps du manche (2) est constitué d'une partie de tête effilée (14), d'une partie intermédiaire (6) et d'une partie arrière (12). La partie de tête (4) comporte un appui (16) pour l'index de la main de l'utilisateur, tandis qu'un côté de la partie intermédiaire (6) comporte une zone de support concave (9) pour le pouce, et les côtés opposés à la fois de la partie de tête (4) et de la partie intermédiaire (6) comportent des zones de support (10, 17) pour le médius. On peut utiliser le manche en le saisissant par en dessus ou, de deux façons différentes, comme s'il s'agissait d'un stylo ou analogue. Il est donc particulièrement bien adapté à un couteau de chirurgien.
EP90916531A 1989-10-30 1990-10-30 Manche de couteau Ceased EP0452455A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902676 1989-10-30
NL8902676A NL8902676A (nl) 1989-10-30 1989-10-30 Handgreep voor een mes of dergelijk handgereedschap.

Publications (1)

Publication Number Publication Date
EP0452455A1 true EP0452455A1 (fr) 1991-10-23

Family

ID=19855532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90916531A Ceased EP0452455A1 (fr) 1989-10-30 1990-10-30 Manche de couteau

Country Status (4)

Country Link
EP (1) EP0452455A1 (fr)
FI (1) FI913116A7 (fr)
NL (1) NL8902676A (fr)
WO (1) WO1991006405A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1247036B (it) * 1991-06-28 1994-12-12 Mark P Wilson Utensile per mangiare ad uso dei portatori di handicap funzionali della mano
GB9221495D0 (en) * 1992-10-13 1992-11-25 Wotton Richard A Gripped surgical handle
GB2291614B (en) * 1994-07-21 1998-01-14 Hoe Yun Choy Ergonomic handle for utensils and cutlery
JPH11510104A (ja) * 1995-07-27 1999-09-07 アメリカ合衆国 端子挿入工具用人間工学的ハンドル
ES2135334B1 (es) * 1997-07-15 2000-05-16 Gascon Jesus Antonio Torres Cuchillo perfeccionado.
GB2338673B (en) * 1998-06-27 2002-07-24 David Raffo Handgrip
FR2844674B1 (fr) * 2002-09-19 2005-02-25 Jean Christian Horel Scarificateur de patons a manche orientable
FR2844675B1 (fr) * 2002-09-19 2006-03-03 Jean Christian Horel Scarificateur de patons a manche ergonomique
US20040177515A1 (en) * 2003-03-12 2004-09-16 Mark Horton Manual food cutting device and method of using same
US7930804B2 (en) * 2003-12-30 2011-04-26 Randall Cornfield Implement handle
GB2411840A (en) * 2004-03-09 2005-09-14 Barbara Spours-Idun Surgical handles with finger grip
IL192739A (en) * 2008-07-10 2015-07-30 Scalpal Llc Handle for grading and dental tools
US11040459B2 (en) * 2018-07-03 2021-06-22 Norman Singer Knife with extended handle grip portion
CN116392175A (zh) * 2023-03-23 2023-07-07 四川康铭智能装备科技有限公司 一种口腔拉钩
WO2024249689A2 (fr) * 2023-05-30 2024-12-05 Montes De Oca Juan Bernardo Poignée ergonomique pour couteau

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056054A (en) * 1934-07-18 1936-09-29 John L Osgood Tool handle
DE2729749A1 (de) * 1977-07-01 1979-01-11 Juergen Berger Griffausbildung an einem schreibgriffel oder einem werkzeug
GB2058648B (en) * 1979-09-17 1983-01-19 Little People Ltd Cutlery
ATE16904T1 (de) * 1982-03-16 1985-12-15 Beermann Kg Martor Argentax Werkzeuggriff fuer eine darin insbesondere laengsverschiebliche messerklinge.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9106405A1 *

Also Published As

Publication number Publication date
NL8902676A (nl) 1991-05-16
FI913116A0 (fi) 1991-06-26
WO1991006405A1 (fr) 1991-05-16
FI913116A7 (fi) 1991-06-26

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