WO2010040904A1 - Outil de coupe - Google Patents

Outil de coupe Download PDF

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Publication number
WO2010040904A1
WO2010040904A1 PCT/FI2009/050810 FI2009050810W WO2010040904A1 WO 2010040904 A1 WO2010040904 A1 WO 2010040904A1 FI 2009050810 W FI2009050810 W FI 2009050810W WO 2010040904 A1 WO2010040904 A1 WO 2010040904A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
handle
cutting tool
locking
tool according
Prior art date
Application number
PCT/FI2009/050810
Other languages
English (en)
Inventor
Jukka RÅBACK
Marko Pudas
Johanna Lehtinen
Matti MÄNTYSALO
Magnus Johansson
Original Assignee
Raaback Jukka
Marko Pudas
Johanna Lehtinen
Maentysalo Matti
Magnus Johansson
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 Raaback Jukka, Marko Pudas, Johanna Lehtinen, Maentysalo Matti, Magnus Johansson filed Critical Raaback Jukka
Publication of WO2010040904A1 publication Critical patent/WO2010040904A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00—Hand knives with one or more detachable blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/06—Socket, tang, or like fixings with multiple socket, e.g. T-socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/12—Locking and securing devices
    • B25G3/32—Locking and securing devices in association with, or including, tang, bolt, or other member passing axially through whole length of handle
    • 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 cutting tool as defined in the preamble of claim 1.
  • Various cutting tools such as knives and saws, have been used according to prior art for many different cutting and truncating purposes.
  • One common cutting tool construction according to prior-art is the type that comprises a handle intended for gripping with the hand and a blade that is an extension of the handle.
  • One problem, among others, with these cutting tools is that the blade, being an extension of the handle, lengthens the overall length of the cutting tool.
  • Another problem is that the blade of a cutting tool is dangerous when unprotected.
  • Yet another problem with these types of cutting tools is that sufficient force cannot necessarily be brought to bear on the object to be cut.
  • Cutting tools in which the handle is disposed above the blade and essentially in the direction of the blade are also known.
  • the force needed for the cutting object is easily obtained with these tools, but a problem is e.g. that the cutting tool is of an awkward shape and size. In this case it takes up a relatively large amount of space and is therefore awkward to store between cutting usages or to move from one place to another.
  • a problem is that the unprotected blade of a cutting tool can be dangerous when the cutting tool is not in use.
  • the object of the present invention is to eliminate the above-mentioned drawbacks and to achieve a practical and inexpensive cutting tool that also takes little space in its storage position and is safe in use. Another object is to achieve a multipurpose cutting tool, which while fitting into a small space is also easy to store between times of usage and is easily transportable, in which case the cutting tool is also suited for use on expeditions.
  • the arrangement of the invention is characterized by what is disclosed in the characterization part of claim 1.
  • Other embodiments of the invention are characterized by what is disclosed in the other claims.
  • the cutting tool is safe, effective, provides good cutting force and is multipurpose. Additionally, the blade of the cutting tool can be turned into a safe position, in which case the blade does not present a risk of injury when the cutting tool is not in use. Likewise, the cutting tool is of small size when the blade is folded inwards and is thus easy to dispose in its storage location between times of usage and or to take along e.g. for use on an expedition or temporarily to another place of usage. A further advantage is that the blade itself is not damaged when in the storage position, so that a separate protective sheath or knife stock is not needed.
  • Fig. 1 presents an oblique view of one cutting tool according to the invention, seen from the front and from above and with the blade folded into the storage position,
  • Fig. 2 presents an oblique view of one cutting tool according to the invention, seen from the rear and from the side and with the blade, the handle and also the other components detached,
  • Fig. 3 presents a side view of the cutting tool according to Fig. 2, with the blade detached from the handle
  • Fig. 4 presents a side view of the cutting tool according to Fig. 2, partly sectioned and with the blade under the handle in the usage position
  • Fig. 5 presents a side view of the cutting tool according to Fig. 2, partly sectioned and with the blade in the usage position as an extension of the handle
  • Fig. 6 presents a side view of the cutting tool according to Fig. 2, partly sectioned and with the blade with the blade turned into its, storage position
  • Fig. 7 presents a partially sectioned side view of the handle of another cutting tool according to the invention.
  • Fig. 8 presents a rear view of the handle of the cutting tool according to Fig. 7,
  • Fig. 9 presents a rear view of the handle of the cutting tool according to Fig. 7, with the blade locked into its storage position
  • Fig. 10 presents an oblique view of one cutting tool according to the invention, seen the rear and from the side with the blade turned under the handle into its usage position
  • Fig. 11 presents a side view of the cutting tool according to Fig. 10 with the blade detached from the handle
  • Fig. 12 presents an oblique front view of yet another cutting tool according to the invention, with the blade turned into its storage position.
  • Fig. 1 presents an oblique view of one cutting tool according to the invention, seen from the front and from above.
  • the main parts of the cutting tool according to the invention are a blade 1, a handle 2 and a locking mechanism 3 of the handle.
  • the handle 2 comprises a gripping part 2a in essentially the longitudinal direction of the blade 1 and a fixing part 2b securely connected at its first end to the gripping part 2a or being the same piece as the gripping part 2a, which fixing part extends from its free end, i.e. from its second end, in the direction of the blade 1 and which second end comprises a locking- and fixing mechanism 3 of the blade 1.
  • Fig. 2 presents an oblique view of one cutting tool according to the invention, seen from the rear and from the side as a so-called explosion drawing, wherein the blade 1 is fitted in its storage position under the handle 2, although detached from the handle in the figure.
  • the bottom part, i.e. the second end, of the fixing part 2b of the handle 2 comprises a fixing hole 2c, essentially in the longitudinal direction of the blade 1, extending through the bottom part of the fixing part 2b of the handle, into which fixing hole the blade 1 is fixed from its blade shank Ia on its second end into both its usage position and its storage position.
  • a number of different blades 1 for different usage purposes can be fixed to the same handle 2, however only one blade at a time.
  • the structure of the bottom part of the fixing part 2b of the handle 2 is essentially symmetrical in the longitudinal direction of the blade 1 with respect to the fixing of the blade 1, from the front side and from the rear side of the bottom part, in which case the blade 1 can be fixed into its usage position in the handle 2 under the gripping part 2a of the handle 2 or as an extension of the handle 2.
  • the blade 1 itself can have many different usage purposes, e.g. as a general-purpose knife, a kitchen knife, a cook's knife, a meat knife, a timberjack's sheath knife, and an essentially heavy-duty blade suited as a blade of another fairly large knife. At least one edge of the blade is sharpened. The other edge is normally a dull edge of the thickness of the blade or it can also be a special edge manufactured in a suitable way.
  • the rear end, i.e. the second end, of the blade 1 comprises a blade shank Ia that is an extension of the blade and is essentially narrower than the blade in the transverse direction of the blade, at the free end, i.e.
  • the shank Ia of the blade is preferably near the top edge of the blade 1 in the height direction, i.e. near the edge opposite the cutting edge. In certain blade models the shank Ia of the blade can also be nearer the center part of the blade in the height direction.
  • the longitudinal rotation axis of the blade 1 is in the height direction essentially on the longitudinal centerline of the blade shank Ia.
  • the locking mechanism 3 is intended for fitting on top of the blade shank Ia such that the three essentially coaxial and circular cylindrical parts 3a-3c, which have outer rims essentially as large as each other, form a rotation axis of the blade 1 around, i.e. on top of, the blade shank Ia, the cross-section of which rotation axis is essentially circular.
  • the outer diameters of the cylindrical parts 3a-3c are dimensioned to fit essentially without a clearance into the fixing hole 2c in the bottom part of the fixing part 2b of the handle 2.
  • Each cylindrical part 3a-3c comprises an essentially rectangular through-hole in the center, the cross-section' of which hole corresponds essentially to the cross-section of the blade shank Ia, but which is dimensioned to be suitably larger than the cross-section of the blade shank Ia so that the cylindrical parts 3a-3c can be disposed consecutively to each other, and as far as possible without any clearance, onto the blade shank Ia.
  • the first cylindrical part 3a is a support part made of an essentially hard and durable material and it is disposed the closest to the rear part of the blade 1, essentially close against the rear surface Id of the blade 1.
  • the end of the first cylindrical part 3a ' on the side of the blade 1 comprises a short cylindrical part, the diameter of which is greater than the diameter of the first cylindrical part fitting into the hole 2c.
  • the collar formed by this short cylindrical part rests on the front edge of the fixing part 2b of the handle when the blade 1 is tightened into its position, and keeps the structure firm.
  • the second cylindrical part 3b is a tightening part of a soft material, e.g. a compressible rubber-like substance, and it is intended to be compacted in the axial direction when locking the blade 1 to the handle 2.
  • a soft material e.g. a compressible rubber-like substance
  • the second cylindrical part 3b bulges outwards as its outer diameter grows and it presses strongly against the inner surface of the fixing hole 2c preventing movement of the blade 1 in the longitudinal direction of the blade and also preventing rotation of the blade 1, in which case the blade 1 stays firmly in its position.
  • the third cylindrical part 3c is a compression part ' made of an essentially hard and durable material, the surface of the end of which compression part that corresponds to the tightening part is essentially straight, but the surface of the second end can be either straight or concave.
  • the eccentric surfaces 3e of the locking lever 3d press against this surface when locking the blade 1 into its position.
  • the cylindrical parts 3a-3c are locked into their position on top of the blade shank Ia with the locking lever 3d, which is presented in Fig. 2 in its locking position.
  • the bottom part of the locking lever 3d comprises an indent for the blade shank Ia and the eccentric surfaces 3e are on both sides of the indent, which eccentric surfaces are dimensioned such that when the locking lever 3d is in its vertical position according to the figure the distance of the eccentric surfaces 3e from the rotation axis 3f of the locking lever is at its greatest, in which case the compression exerted by the eccentric surfaces 3e on the cylindrical parts 3a-3c is also at its greatest.
  • Fig. 3 presents a cutting tool according to the invention, in which the blade 1 is ready for installing into its position.
  • a corresponding situation would be when the blade 1 is just taken off the handle 2.
  • the combined length in the axial direction of all three cylindrical parts 3a-3c is dimensioned to be such that is suitably shorter than the distance of the locking slot Ib of the blade shank' Ia from the rear surface Id of the blade. In this case when the cylindrical parts 3a-3c are installed on top of the blade shank Ia, the locking slot Ib is visible outside the rear surface of the compression part 3c.
  • a blade 1 that is provided with a locking- and fixing mechanism 3 can be fitted into the handle 2 by pushing the blade shank Ia with locking- and fixing mechanism 3 as far as possible through the fixing hole 2c in the bottom' part of the fixing part 2b of the handle 2 and by locking the blade 1 into its position by turning the locking lever 3d upwards towards the rear edge of the fixing part 2b of the handle 2, in which case the eccentric surfaces 3e of the locking lever 3d compress the tightening part 3b via the compression part 3c so much that the blade 1 is locked into its position.
  • Fig. 4 presents a cutting tool according to the invention, in which the blade 1 is locked into its usage position under the gripping part 2a of the handle 2 essentially longitudinally to the gripping part 2a.
  • the tightening part 3b has expanded and locked the blade 1 into its position.
  • the gap 4 between the blade 1 and the bottom edge of the handle 2 is sufficiently large for fingers to be wrapped around the handle 2, in which case the grip on the handle 2 is as solid and safe as possible.
  • the shape of the gap 4 as seen from the side is limited to the shape of the bottom edge of the handle 2 and to the shape of the top edge, i.e. the rear edge, of the blade 1, which rear edge is in this embodiment essentially straight.
  • Fig. 5 presents a cutting tool according to the invention, in which the blade 1 is locked into its usage position as an extension of the handle 2 and essentially longitudinally to the gripping part 2a.
  • the shank Ia of the blade is now pushed into the fixing hole 2c from the opposite direction than in Fig. 4.
  • the locking lever 3d is in this case on the front side of the fixing part 2b of the handle under the gripping part 2a.
  • the tightening part 3b has expanded and locked the blade 1 into its position.
  • Fig. 6 presents a cutting tool according to the invention, in which the blade 1 is locked into its storage position under the gripping part 2a of the handle 2 essentially longitudinally to the gripping part 2a.
  • the tightening part 3b has expanded and locked the blade 1 into its position.
  • the blade 1 is folded dnto its storage position below the handle 2 such that a gap 4 of equal width is between the blade 1 and the bottom edge of the gripping part 2a of the handle 2, which gap is in this position of the blade essentially narrow, in which case the cutting part of the blade 1 is protected and thus does not present a risk of injury.
  • the shape of the gap 4 1 as seen from the side is limited to the shape of the bottom edge of the gripping part 2a of the handle 2 and to the shape of the cutting edge of the blade 1.
  • the cutting edge of the blade 1 is e.g. outward curving.
  • the cutting edge of the blade is turned towards the edge of the handle 2 on the' side of the blade, i.e. the bottom edge of the handle, and viewed from the side the radius of curvature of the cutting edge of the blade 1 is essentially the same as the radius of curvature of the bottom edge of the handle 2.
  • the blade can, however, also be of a different shape and of a different size. In this case e.g.
  • the top edge of the blade 1 does not necessarily follow the bottom edge of the handle 2, in which case when viewed from the side the radius of curvature of the cutting edge of the blade 1 is not necessarily the same as the radius of curvature of the bottom edge of the handle 2.
  • Figs. 7-9 present a handle 2 of another cutting tool according to the invention, in which the locking of the blade 1 is done in a different way than what is presented before.
  • the front surface and the rear surface of the fixing part 2b of the handle 2 comprise an elongated recess 5 that extends towards the fixing hole 2c and all the way to the fixing hole 2c, into which a locking lever 3d can be pressed when the blade 1 is locked into position.
  • the side edges of the recess 5 prevent the locking lever 3d from rotating to the side when using the cutting tool.
  • Figs. 10 and 11 present one cutting tool according to the invention, which differs from the solutions presented above mainly in relation to their locking mechanism.
  • the blade 1 is fixed at its first end in a jointed manner to the fixing hole 2c in the second end of the handle 2, via a fixing means that functions as a rotation axis 7, such that the blade 1 can be turned around its rotation axis 7 into its storage position and into its usage position.
  • the rotation axis 7 is essentially longitudinal to the blade 1 and disposed in the height direction of the blade either essentially in the center of the blade 1 or closer to the top edge, i.e. rear edge, of the blade 1.
  • the blade 1 is locked with a locking mechanism 6 from its rotation axis 7 into at least two different positions in the rotation direction, namely its storage position and its usage position.
  • the locking mechanism 6 is e.g. a bushing made of plastic or other suitable corresponding material and disposed on top of the rotation axis 7 of the blade, the second end of which bushing comprises at least one locking means 6a and correspondingly the front edge of the fixing part 2b of the handle 2 comprises at least one locking detent 6a, to which the locking means 6a can be fitted for locking the blade 1 into its storage position and into usage position.
  • the second end of the locking mechanism 6 comprises at least one locking claw 6d and correspondingly the rear edge of the fixing part 2b of the handle 2 comprises at least one detent surface 6c for locking the locking claw 6d into it position in the handle 2 and thus to prevent longitudinal movement of the blade 1.-
  • the first end of the blade 1 and of the handle 2 is free and between the free ends is a distance of the magnitude of the gap 4.
  • Fig. 12 presents an oblique front view of a cutting tool according to one more embodiment of the invention, which differs from the cutting tool described earlier mainly in relation to its locking mechanism 3.
  • This locking mechanism
  • the 3 comprises e.g. a locking means that can be fitted into a locking detent in the rotation axis 7 of the blade 1, which locking means is arranged to prevent and to release rotational movement of the rotation axis 7 around its axis of rotation.
  • the locking detent is e.g. a groove or hole on the rotation axis
  • the locking means is e.g. a rod-like transmission means.
  • the locking means is also fitted to at the same time prevent longitudinal movement of the rotation axis of the blade 1, i.e. to lock the blade 1 into its position in the longitudinal direction.
  • the structure and operation of the locking means of the blade can be different to what is presented above.
  • the locking of the rotation movement of the blade and the locking of the longitudinal movement of the blade can be done with different locking means than what is presented above and with mutually different locking means.
  • the cutting blade can be a straight blade or an otherwise differently shaped blade.
  • the blade can also be a toothed saw blade, in which case the cutting tool functions as a saw.
  • the blade can also be scissors or e.g. pliers, with which pliers it is possible to grip e.g. the edge of a hot food preparation dish.
  • the handle part can be constructed so that the handle can be turned backwards, to become essentially an extension of the blade part.
  • the handle comprises e.g. one joint arranged to turn around the essentially transverse axis with respect to the blade, around which the rear part of the handle can be rotated so that the handle settles into an extension to the essentially straight blade part.
  • the handle part also comprises its own locking means for the purpose of this function.
  • the fixing hole in the fixing part of the handle does not necessarily need to be round.
  • the fixing hole can be in its cross-section e.g. essentially the shape and size of the cross-section of the blade shank, e.g. in the case of the embodiment essentially rectangular. In this case the blade is not able to accidentally rotate in connection with use.
  • the fixing, tightening into position and detachment of the blade can however be implemented with an eccentrically operating locking lever, in which case when changing the position of the blade, e.g.
  • the fixing of the blade is loosened with the locking lever and the blade shank is drawn out of the fixing hole of the handle and also the blade is turned around its longitudinal axis into the upside-down position and the blade shank is pushed back into the fixing hole of the handle and locked into its new position by means of the locking lever.

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

Abstract

La présente invention a pour objet un outil de coupe qui comprend au moins une poignée (2) pourvue d'un trou de fixation (2c), une lame (1), pourvue d'une queue de fixation de lame (Ia), montée de façon à se déplacer par rapport à la poignée (2), et un mécanisme de verrouillage (3, 6) de la lame (1) pour verrouiller la lame (1) dans sa position de stockage et dans sa position d'utilisation dans la poignée (2). La lame (1) est conçue pour être tournée autour de l'axe longitudinal de la lame (1) entre sa position de stockage et sa position d'utilisation.
PCT/FI2009/050810 2008-10-09 2009-10-09 Outil de coupe WO2010040904A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20080562 2008-10-09
FI20080562A FI20080562A0 (fi) 2008-10-09 2008-10-09 Leikkuuväline

Publications (1)

Publication Number Publication Date
WO2010040904A1 true WO2010040904A1 (fr) 2010-04-15

Family

ID=39924534

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2009/050810 WO2010040904A1 (fr) 2008-10-09 2009-10-09 Outil de coupe

Country Status (2)

Country Link
FI (1) FI20080562A0 (fr)
WO (1) WO2010040904A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB442184A (en) * 1935-02-11 1936-02-04 John Shaw Henderson Improvements in and relating to mowing, reaping and binding machines
US6276063B1 (en) * 2000-02-24 2001-08-21 Chia Yi Ent. Co., Ltd. Folding knife with safety for blade
US20050097759A1 (en) * 2003-10-03 2005-05-12 Hiroshi Igarashi Knife with movable handle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB442184A (en) * 1935-02-11 1936-02-04 John Shaw Henderson Improvements in and relating to mowing, reaping and binding machines
US6276063B1 (en) * 2000-02-24 2001-08-21 Chia Yi Ent. Co., Ltd. Folding knife with safety for blade
US20050097759A1 (en) * 2003-10-03 2005-05-12 Hiroshi Igarashi Knife with movable handle

Also Published As

Publication number Publication date
FI20080562A0 (fi) 2008-10-09

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