WO2000020177A1 - Systeme d'outil - Google Patents

Systeme d'outil Download PDF

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Publication number
WO2000020177A1
WO2000020177A1 PCT/KR1999/000598 KR9900598W WO0020177A1 WO 2000020177 A1 WO2000020177 A1 WO 2000020177A1 KR 9900598 W KR9900598 W KR 9900598W WO 0020177 A1 WO0020177 A1 WO 0020177A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
handle
tool assembly
handle portion
head
Prior art date
Application number
PCT/KR1999/000598
Other languages
English (en)
Inventor
Geun Chan Park
Original Assignee
Geun Chan Park
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 KR1019980041444A external-priority patent/KR100289971B1/ko
Priority claimed from KR2019990001251U external-priority patent/KR200223384Y1/ko
Priority claimed from KR2019990004879U external-priority patent/KR200223385Y1/ko
Application filed by Geun Chan Park filed Critical Geun Chan Park
Publication of WO2000020177A1 publication Critical patent/WO2000020177A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D1/00—Hand hammers; Hammer heads of special shape or materials
    • 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
    • B25G3/28—Locking and securing devices comprising wedges, keys, or like expanding means

Definitions

  • the present invention relates to a tool which strikes an object, and more particularly to a tool assembly for a stroke which can improve a mutual engaging force between a strike portion and a handle and can prevent defacement of the handle and has a good appearance.
  • a wedge is forcedly inserted into a gap between the hole of the iron portion and the handle from the tip of the handle.
  • a problem with the engagement between the iron portion and the handle can be raised on time. For example, the engaging portion between the iron portion and the handle is so loosened that the striking work is inconveniently accomplished, or the iron portion is separated from the handle that the work becomes impossible.
  • the iron portion and the handle are made of iron and wood, respectively, and that the external force exerted on the object when the object is inserted or separated by the tool is transferred to the handle, especially to the tip portion of the handle which is inserted into the hole of the iron portion and a neck portion which is located near the hole of the iron portion. For this reason, the tip portions and the neck portions of the handle are distorted and cracked. As a result, the engaging force between the handle and the iron portion when the wedge is forcedly inserted becomes weakened.
  • FIGs la and lb show a conventional hammer assembly.
  • a cut-away portion 3 is formed in the middle of the inserting portion 2 which is formed at the tip end portion of a body 1 of a handle, and a reinforcing metal 4 is inserted into the cut-away portion 3 and is engaged with the handle by means of a rivet 5.
  • the reinforcing metal 4 reinforces the handle, the braking of the inserting portion 2 can be prevented.
  • the reinforcing metal since the reinforcing metal is inserted in the cut-away portion, the engaging portion with the iron portion becomes split and therefore the supporting strength becomes weakened. In this case, the handle should be separated from the iron portion and be exchanged.
  • the present invention is invented to settle the above-mentioned problems, and the object of the present invention is to provide a tool assembly which can improve a mutual engaging force between a strike portion and a handle and can prevent defacement of the handle and has a good appearance.
  • a tool assembly comprising: a striking portion having a through-hole; a handle portion an upper portion of which is inserted into the through-hole of the striking portion to act as a knob for movement of the striking portion; and a first means penetrating through the handle portion and regulating engaging degree between the handle portion and the striking portion by longitudinally moving with respect to the handle portion, thereby deforming the upper portion of the handle portion towards a direction vertical to the striking direction of the striking portion.
  • a Y-shaped cut-away portion is formed in the upper portion of the handle portion, and a through-hole extending from a lower portion of the Y-shaped cut-away portion to a lower portion of the handle portion, and the first means includes a head of reversed trapezoid, an extending bar extending downward from the head and having a bolt portion on a lower end thereof, and a nut engaged with the bolt portion.
  • a recess is formed on the bottom surface of the handle portion, and the first means comprises a head of reversed trapezoid mounted to the Y-shaped cut-away portion, an extending bar integrally formed with the head and extending downward to a predetermined position in the recess through the through-hole and having a bolt portion in the lower end portion thereof, and an elongate nut disposed in the recess to be engaged with the bolt portion of the extending bar and moving the extending bar downward.
  • the length of the elongate nut is larger than the depth of the recess such that a predetermined portion thereof is protruded outside the bottom surface of the handle portion, and the thickness of the upper portion of the head is larger than that of the lower portion of the head.
  • a stress dispersing hole is formed along the lower end of the Y-shaped cut-away portion, a recess communicated with the through-hole is formed on the bottom surface of the handle portion, and the first means comprises a head of reversed trapezoid inserted into the Y-shaped cut-away portion and the stress dispersing hole, a screw shaft detachably engaged with the head and extending downward to a predetermined position in the recess through the through-hole and having a bolt portion in the lower end portion thereof, and an elongate nut disposed in the recess and engaged with the bolt portion of the screw shaft and moving the screw shaft downward.
  • the cross-section of the stress dispersing hole is substantially circular.
  • the tool assembly further comprises a second means mounted in the handle portion to absorb vibration generated by the first means, the second means preventing friction between the first means and an inner surface of the handle portion, thereby preventing wear of the inner surface of the handle portion.
  • the second means comprises a reinforcing member made of a vibration- proof metal, and the reinforcing member comprises a shaft mounted to the bottom portion of the through-hole and having an insertion hole in the interior thereof and a support portion integrally formed with the shaft and positioned on the bottom portion of the recess, the support portion having a shape corresponding to the shape of the bottom portion of the recess.
  • FIG. la is a perspective view for showing a conventional handle of a hammer
  • FIG. lb is a cross-sectional view for showing engaging state of a handle and an iron portion
  • FIG. 2 is an exploded perspective view for showing a tool assembly according to the first embodiment of the present invention
  • FIG. 3 is an perspective view for showing the tool assembly shown in FIG.
  • FIG. 4 is an exploded perspective view for showing a tool bar and metal plates
  • FIG. 5 is a perspective view for showing engaging state of the tool bar and the metal plates of FIG. 4;
  • FIG. 6 is an exploded perspective view for showing a tool assembly according to the second embodiment of the present invention
  • FIG. 7 is a perspective view for showing the tool assembly shown in FIG. 6;
  • FIG. 8 is an exploded perspective view for showing a tool assembly according to the third embodiment of the present invention.
  • FIG. 9 is an exploded perspective view for showing a tool bar shown in FIG. 8;
  • FIG. 10 is a cross-sectional view taken along the A-A of FIG. 8;
  • FIG. 11 is a perspective view for showing a tool assembly according to the fourth embodiment of the present invention.
  • FIGs. 2 and 3 shows a tool assembly 150 for a stroke according to the first embodiment of the present invention.
  • FIG. 2 is an exploded perspective view for showing a tool assembly according to the first embodiment of the present invention
  • FIG. 3 is an perspective view for showing the tool assembly shown in FIG. 2.
  • the tool assembly 150 according to the first embodiment includes a striking portion 110 in which a circular, rectangular or the like through-hole 112 is formed, a handle portion 157 the upper portion of which has a cross-section which corresponds to the through-hole 112 of the striking portion 112 and in which a hole
  • a nut 170 for determines the position of the extending bar 160 and for minutely moving the extending bar 160 along the extending direction 200 in the hole 152.
  • the handle 157 is generally made of wood, and the upper portion of the handle 157 is engaged with the through-hole of the striking portion 110 to act as a knob.
  • a Y-shaped cut-away portion which becomes narrow and is parallel to the striking direction 300 of the striking portion 110 is formed in the upper portion of the handle portion 157.
  • a through-hole 159 which extends from the lower portion of the Y-shaped cut-away portion 159 to the lower portion of the handle portion 157 is formed so as to be form a hole 152 of the handle portion 157.
  • the extending bar 160 extends downward from the head 162 of reversed trapezoid.
  • the extending bar 160 When inserted into the handle portion 157 through the Y-shaped cut-away portion 156 from the upper portion of the handle portion 157, the extending bar 160 is guided into the through-hole, and the head 162 is positioned in the Y-shaped cut-away portion 156.
  • a bolt portion 164 is formed in the lower portion of the extending bar 160 and is engaged with the nut 170.
  • a circular pocket 155 with a predetermined pocket is formed in the lower portion of the handle portion 157.
  • a washer 174 for engaging the nut 172 with the bolt portion 164 through the pocket 155 when the bolt portion 164 of the lower portion of the body of the extending bar 160 is positioned in the pocket 155 is provided.
  • the upper portion of the head 162 supports the front and rear walls of the through-hole 112 of the striking portion 110 and absorbs impact during the work.
  • the head 162 When the head 162 is struck downward by another tool, the head 162 pushes both walls of the Y-shaped cut-away portion 156 and increases the thickness of the tip of the handle portion 157, and thus the engaging strength of the tip 154 of the handle portion and the striking portion 110 is increased.
  • the handle portion 157 is moved upward, and the head 162 deviates to the outside of the Y-shaped cut-away portion 156, thereby decreasing the thickness of the tip 154 of the handle portion. And then, the engaging strength between the tip 154 of the handle and the striking 110 is weak, the handle portion can be easily separated from the striking portion 110.
  • the lower end of the extending bar 160 is tapered to minimize the deformation thereof when struck by a tool. It is because it becomes difficult to separate and reassemble the extending bar from and with the handle portion 157 if the lower end of the extending bar 160 is deformed.
  • the tool assembly 150 for a stroke includes at least metal plate 180 which covers the head 162 of the extending bar 160.
  • a hole 182 is formed in the middle of the metal plate 180 and the metal plate 180 is mounted in surrounded relationship to the extending bar 160.
  • the metal plate 180 is bent about the lower portion of the head 162 and covers the head 162 to increase the size of the head 162.
  • the metal plate 180 is provided to increase the thickness of the head 162 when the engaging portion 154 of the handle portion 157 is loosened, thereby increasing the durability of the handle portion 154.
  • the metal plates can be chosen to have different thickness.
  • the tip of the handle portion 157 is inserted into the through-hole of the striking portion 110. Thereafter, the head 162 is struck with a tool to insert the extending bar 160 into the hole 152 formed in the handle portion 157. After the insertion, the bolt portion 164 of the lower portion of the extending bar 160 is located in the pocket 155 of the lower portion of the handle portion 157, and the washer 174 and the nut 172 is engaged in turn.
  • the nut 172 is rotated to inserted further the extending bar 160 into the handle 157.
  • the engaging portion 154 of the handle portion 157 becomes enlarged and is firmly engaged with the striking portion 110.
  • the thickness of the head 162 can be increased by covering the head 162 of the extending bar 160 with the metal plate 180 before the extending bar 160 is inserted into the handle portion 150, as shown in FIG. 5.
  • FIGs. 6 and 7 shows a tool assembly 250 for a stroke according to the second embodiment of the present invention.
  • FIG. 6 is an exploded perspective view for showing a tool assembly according to the second embodiment of the present invention
  • FIG. 7 is a perspective view for showing the tool assembly shown in FIG. 6.
  • the tool assembly of the second embodiment includes a striking portion 210 in which a through-hole 212 is formed, and a handle portion 257 which has a cross-section corresponding to the through-hole 212 of the striking portion 210 and in which a hole 252 which penetrates along the extending direction 300 thereof is formed in the interior thereof.
  • a head 162 which is inserted into the hole 152 of the handle 157 and regulates the engaging degree of the handle 157 and the striking portion 110 by deforming the upper portion of the handle portion 157 so as to be perpendicular to the striking direction 300 of the striking portion 110 and an extending bar 160 which extends from the head 162 is inserted into the hole 252 of the handle portion 257.
  • a bolt portion 264 is integrally formed in the lower end portion of the extending bar 260.
  • the through-hole 212 can have a circular, rectangular or the like shape.
  • the handle portion 257 is generally made of wood and has a elliptical shape so that a user can easily grasp the handle portion 257, and has concave portions on the exterior thereof.
  • the upper portion of the handle portion 257 is engaged with the through-hole 212 of the striking portion 210, and the handle portion 257 acts as a knob.
  • the hole 252 has a Y-shaped cut-away portion 256 which becomes narrow and is parallel to the striking direction of the striking portion 210 and is formed in the upper portion of the handle portion 257 and a through-hole 259 which extends from the lower portion of the Y-shaped cut-away portion 256 to the lower portion of the handle portion 257.
  • the head 262 has a substantially reversed trapezoid shape and preferably the thickness of the lower portion of the head 262 is smaller than that of the upper portion of the head 262.
  • a circular recess 255 communicated with the through-hole 259 is formed in the bottom surface of the handle portion 257.
  • the recess 255 can have a elliptical or other shape.
  • a end portion of the extending bar 260 in which the bolt portion 264 is formed is extended into the recess 255 through the through-hole 259, and the extended portion is engaged with the elongate nut 330 in the recess 255. It is preferable that the elongate nut 330 is engaged by interposing a washer 320 to prevent the defacement of the engaging portion and reinforce the engaging force.
  • the elongate nut 330 is engaged with the bolt portion 264, and thus determines the position of the extending bar 260 and moves the extending bar 260 in the extending direction 300 in the hole 252.
  • the length of the elongate nut 330 is larger than the depth of the recess 255, and thus a predetermined portion of the elongate nut 330 is protruded outside the recess 255. Therefore, a user can regulate the elongate nut 330 by using a spanner or the like.
  • the protruded portion of the elongate nut 255 is engaged with a cap 340, and thus the appearance of the tool assembly 250 is improved.
  • a plurality of convex portions 342 are formed in the outer surface of the cap 340 to easily rotate the cap 340.
  • a receiving portion 346 is inside the cap 340 to receive the protruded portion of the elongate nut 330.
  • a screw 344 is protruded at the center of the receiving portion 346, and the screw 344 is engaged with the elongate nut 330 and fixedly support the cap 340.
  • the cap 340 improves the appearance of the tool assembly 250, and minutely moves the extending bar 260 downward so that the engaging force between the striking portion 210 and the tip end portion 254 of the handle 257 can be restored when the engaging force is weakened.
  • the elongate nut 330 engaged with the screw 344 of the cap 340 moves towards the cap 340 by rotating the cap 340, and thus the extending bar 260 moves downward. Therefore, since the head portion 260 moves downward along the Y-shaped cut-away portion 256, and thus enlarges the distance between the tip end portions 254, the engaging force between the striking portion 210 and the tip end portion 254 of the handle 257. Therefore, when minute regulation of the engaging force is needed, the elongate nut 330 does not need to be rotated by a separate spanner. However, it is preferable that in order to regulate the engaging force, the elongate nut need to be rotated.
  • a reinforcing member 310 for absorbing the vibration generated by the extending bar 160 and for preventing wear of the inner wall of the through-hole 259 due to the vibration is mounted to the inner surface of the through-hole 259.
  • the reinforcing member 310 is preferably made of a vibration- proof metal to effectively absorb the vibration, and iron metal such as galvanized iron can be used as the reinforcing member 310.
  • the reinforcing member 310 includes a shaft 314 in which an insertion hole 316 is formed in the interior thereof and a circular support 312 which is integrally formed with the shaft 314 and is positioned on the bottom surface of the recess 255.
  • the outer diameter of the shaft 314 corresponds to the inner diameter of the through-hole 259, and the inner diameter of the insertion hole 316 is preferably a little larger than the outer diameter of the extending bar 260.
  • the extending bar 260 When assembled, the extending bar 260 extends through the insertion hole 316, a round portion 318 is formed at the tip of the reinforcing member 310 to minimize the interference between the tip of the extending bar 260 and the tip of the reinforcing member 310.
  • the shaft 314 has such a length that the bolt portion 264 of the extending bar 260 is fully received in the through-hole 259.
  • the tip of the handle portion 257 is inserted into the through-hole 212 of the striking portion 210.
  • the reinforcing member 310 remains inserted into the lower end of the through-hole 259 through the recess 255.
  • the extending bar 260 is inserted into the through-hole 259 formed in the handle portion 257 by striking the head 262 with a tool.
  • a predetermined portion of the bolt portion 264 formed at the lower portion of the extending bar 260 is located in the recess 255 of the lower portion of the handle portion 257 and the head 262 is located in the Y-shaped cut-away portion 252.
  • the washer 320 and the elongate nut 330 are engaged in turn.
  • the extending bar 260 is inserted further into the handle portion 257 by rotating the elongate nut 330 with a tool such as a spanner to strongly engage the striking portion 210 with the handle portion 257.
  • a tool such as a spanner to strongly engage the striking portion 210 with the handle portion 257.
  • the tip end portion 254 of the handle portion 257 is enlarged, thereby strongly engaging with the striking portion 210.
  • the cap 340 is engaged with the elongate nut 330.
  • the engaging force between the striking portion 210 and the tip end portion of the handle portion 257 becomes minutely weakened on time, the engaging force is regulated by rotating the cap 340.
  • the engaging force is regulated by manipulating the elongate nut 330.
  • the vibration of the extending bar 160 generated during the work is easily reduced by the reinforcing member 310. Further, the reinforcing member 310 prevents the friction between the bolt portion 264 and the inner wall of the through-hole 259.
  • the tool assembly 250 for a stroke includes at least one metal plate which covers the head 262 of the extending bar 260.
  • the metal plate 180 shown in the first embodiment is used as the metal plate, and the metal plate enlarges the thickness of the head 262 when the engaging portion 254 of the handle portion 257 is loosened.
  • FIG. 8 shows a tool assembly 250A according to the third embodiment of the present invention.
  • the tool assembly 250A according to the third embodiment of the present invention has a structure similar to the tool assembly 250 according to the second embodiment of the present invention.
  • a circular stress dispersing hole 256a is formed along the lower portion of the Y-shaped cut-away portion 256.
  • the stress dispersing hole 256a disperses the force transferred from the head 262 of the extending bar 260A to the handle portion 257, and prevent concentration of the stress.
  • the extending bar 260A When the extending bar 260A is inserted into the handle portion 257 from the upper portion of the handle portion 257 through the Y-shaped cut-away portion 256, the extending bar 260A is guided into the through-hole 259 and the head 262 of the extending bar 260A is positioned in the Y-shaped cut-away portion 256 and the stress dispersing hole 256a.
  • the extending bar 260A includes a head 262 and a screw shaft 263 detachably engaged with the head 262.
  • a neck portion 262a which has a nut portion 262b is integrally formed in the lower portion of the head 262, and a bolt portion 260a engaged with the nut portion 262b is formed in the upper portion of the screw shaft 263.
  • the head 262 Since the head 262 is detachably engaged with the screw shaft 263, the head 262 can be variously selected so as to have a thickness and a size. Therefore, when the engaging force between the head 262 and the Y-shaped cut-away portion 256 becomes weakened, the head 262 can be changed by a new thicker one.
  • FIG. 10 is a cross-sectional view taken along the A-A of FIG. 8.
  • the through-hole 212 of the striking portion 210 is formed such that the diameter thereof of the upper portion is larger than that of the lower portion, thereby preventing the deviation of the striking portion 210 from the handle portion 257.
  • FIG. 11 shows a tool assembly according to the fourth embodiment of the present invention.
  • the Y-shaped cut-away portion 256B formed in the tip end portion of the handle portion can be formed such that it is vertical to the striking direction of the striking portion 210.
  • the cross-section of the head portion 262A of the extending bar corresponds to that of the Y-shaped cut-away portion 256B.
  • the present invention has an advantage in that the engaging force between the handle portion and the striking portion of the tool assembly can be easily regulated.
  • the vibration generated by the extending bar is absorbed by the reinforcing member, and thus noise can be reduced.
  • the reinforcing member prevents the friction between the extending bar and the inner wall of the through-hole, and thus prevents wear of the inner surface of the handle portion.
  • the tool assembly according to the present invention has a good appearance, and since the contacting portion of the head and the handle portion is substantially circular, concentration of the stress can be prevented and splitting of the tip of the handle portion is prevented. And, since the through-hole of the striking portion is tapered, the deviation of the striking portion can be prevented.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

L'invention concerne un système d'outil convenant pour un marteau. Ce système accroît la force d'accouplement entre la partie frappe et la partie manche et empêche l'usure de la partie manche. Cet outil comprend une partie frappe comprenant un orifice traversant, un manche dont la partie supérieure est insérée dans l'orifice traversant de la partie frappe et servant de poignée pour le mouvement de la partie frappe, un dispositif de régulation qui passe à travers la partie manche et dont le déplacement longitudinal par rapport à la poignée règle la force d'accouplement de la poignée et de la partie frappe, déformant ainsi la partie supérieure de la poignée dans une direction perpendiculaire à la direction de frappe de la partie frappe, et un élément de renfort monté dans la poignée et absorbant la vibration générée par le dispositif régulateur, empêchant en outre le frottement entre le dispositif de régulation et la surface interne le la poignée et prévenant ainsi l'usure de la surface interne de la poignée. Ce système d'outil permet un réglage aisé de la force d'accouplement entre la poignée et la partie frappe. La vibration résultant du travail est absorbée par l'élément de renfort de sorte qu'elle n'est pas transférée dans la main de l'utilisateur et bruit est réduit.
PCT/KR1999/000598 1998-10-01 1999-10-01 Systeme d'outil WO2000020177A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1019980041444A KR100289971B1 (ko) 1998-10-01 1998-10-01 타격용 공구 조립체
KR1998/41444 1998-10-01
KR2019990001251U KR200223384Y1 (ko) 1999-01-29 1999-01-29 타격용 공구 조립체
KR1999/1251U 1999-01-29
KR1999/4879U 1999-03-26
KR2019990004879U KR200223385Y1 (ko) 1999-03-26 1999-03-26 타격용 공구 조립체

Publications (1)

Publication Number Publication Date
WO2000020177A1 true WO2000020177A1 (fr) 2000-04-13

Family

ID=27349822

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR1999/000598 WO2000020177A1 (fr) 1998-10-01 1999-10-01 Systeme d'outil

Country Status (1)

Country Link
WO (1) WO2000020177A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1226871A2 (fr) * 2001-01-24 2002-07-31 Ebara Corporation Sonde-puce réactive et syteme de detection reactif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189612796A (en) * 1896-06-10 1897-04-10 Marmaduke Miller Improvements in or relating to Hammers, Axes, Picks, Adzes, Hatchets, or other like Tools.
GB190519590A (en) * 1905-09-28 1906-09-27 Nicholas George Willis Improvements in Means for Fixing Handles or Shafts to Tools and the like.
GB211041A (en) * 1923-08-02 1924-02-14 Thomas Bradbury Improved means for fixing hammers and other eyed tools to their handles
US2467284A (en) * 1946-06-25 1949-04-12 Dennis F Williams Handle for hammers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189612796A (en) * 1896-06-10 1897-04-10 Marmaduke Miller Improvements in or relating to Hammers, Axes, Picks, Adzes, Hatchets, or other like Tools.
GB190519590A (en) * 1905-09-28 1906-09-27 Nicholas George Willis Improvements in Means for Fixing Handles or Shafts to Tools and the like.
GB211041A (en) * 1923-08-02 1924-02-14 Thomas Bradbury Improved means for fixing hammers and other eyed tools to their handles
US2467284A (en) * 1946-06-25 1949-04-12 Dennis F Williams Handle for hammers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1226871A2 (fr) * 2001-01-24 2002-07-31 Ebara Corporation Sonde-puce réactive et syteme de detection reactif
EP1226871A3 (fr) * 2001-01-24 2004-01-21 Ebara Corporation Sonde-puce réactive et syteme de detection reactif

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Free format text: REVISED ABSTRACT RECEIVED BY THE INTERNATIONAL BUREAU AFTER COMPLETION OF THE TECHNICAL PREPARATIONS FOR INTERNATIONAL PUBLICATION