• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an extractor (1), a method and a set of tools for the extraction of a safety screw or a broken screw, comprising fitting of an extractor (1) in a bore (17). hollowed in said screw, by insertion of the rod (3) of the extractor (1) in said bore (17) and by percussion on the head (7) of said extractor (1) by means of a percussion tool (49). ), so as to couple in rotation the extractor (1) and the screw (13); and extracting the screw (13) by loosening it by means of a key cooperating with the head (7) of the extractor.
    公开号:BE1024703B1
    申请号:E20175246
    申请日:2017-04-07
    公开日:2018-06-07
    发明作者:Yannick Dudot
    申请人:Hubitools SA；
    IPC主号:
    专利说明:

    (30) Priority data:
    09/09/2016 EP 16315008.9 (73) Holder (s):
    HUBITOOLS SA 1300, WAVRE Belgium (72) Inventor (s):
    DUDOT Yannick 57450 CAPPEL France (54) METHOD FOR EXTRACTING SECURITY SCREWS FOR MOTOR VEHICLE WHEELS AND EXTRACTOR FOR IMPLEMENTING THE PROCESS (57) The invention relates to an extractor (1), a method and a set of tools for extracting a safety screw or a broken screw, comprising fitting an extractor (1) into a bore (17) hollowed out in said screw, by inserting the rod (3) of the extractor (1) in said bore (17) and by percussion on the head (7) of said extractor (1) by means of a percussion tool (49), so as to couple in rotation the extractor (1) and wash ( 13); and extracting the wash (13) by loosening it by means of a key cooperating with the head (7) of the extractor.
    Fig. 1
    BELGIAN INVENTION PATENT
    FPS Economy, SMEs, Middle Classes & Energy
    Publication number: 1024703 Deposit number: BE2017 / 5246
    Intellectual Property Office International Classification: B25B 27/18 Date of issue: 07/06/2018
    The Minister of the Economy,
    Having regard to the Paris Convention of March 20, 1883 for the Protection of Industrial Property;
    Considering the law of March 28, 1984 on patents for invention, article 22, for patent applications introduced before September 22, 2014;
    Given Title 1 “Patents for invention” of Book XI of the Code of Economic Law, article XI.24, for patent applications introduced from September 22, 2014;
    Having regard to the Royal Decree of 2 December 1986 relating to the request, the issue and the maintenance in force of invention patents, article 28;
    Given the patent application received by the Intellectual Property Office on 07/04/2017.
    Whereas for patent applications falling within the scope of Title 1, Book XI of the Code of Economic Law (hereinafter CDE), in accordance with article XI. 19, §4, paragraph 2, of the CDE, if the patent application has been the subject of a search report mentioning a lack of unity of invention within the meaning of the §ler of article XI.19 cited above and in the event that the applicant does not limit or file a divisional application in accordance with the results of the search report, the granted patent will be limited to the claims for which the search report has been drawn up.
    Stopped :
    First article. - It is issued to
    HUBITOOLS SA, Rue de la Station 13, 1300 WAVRE Belgium;
    represented by
    FRENNET Pierre-Paul, Center Monnet - Avenue Jean Monnet 1, 1348, LOUVAIN-LA-NEUVE;
    a Belgian invention patent with a duration of 20 years, subject to the payment of the annual fees referred to in article XI.48, §1 of the Code of Economic Law, for: PROCEDURE FOR EXTRACTING SECURITY SCREWS FOR WHEELS OF MOTOR VEHICLE AND EXTRACTOR FOR IMPLEMENTING THE
    PROCESS.
    INVENTOR (S):
    DUDOT Yannick, Rue de Henriville 225, 57450, CAPPEL;
    PRIORITY (S):
    09/09/2016 EP 16315008.9;
    DIVISION:
    divided from the basic application: filing date of the basic application:
    Article 2. - This patent is granted without prior examination of the patentability of the invention, without guarantee of the merit of the invention or of the accuracy of the description thereof and at the risk and peril of the applicant (s) ( s).
    Brussels, 07/06/2018, By special delegation:
    BE2017 / 5246
    PROCESS FOR EXTRACTING SECURITY SCREWS FOR MOTOR VEHICLE WHEELS AND EXTRACTOR FOR IMPLEMENTING THE PROCESS
    The invention relates to the field of processes and tools for automobile mechanics and relates in particular to the processes and tools for removing wheels from a vehicle, for example a motor vehicle.
    It is known to fix the wheel of a vehicle on its hub by means of a plurality of screws, one of which is a security or anti-theft screw. These security screws, also called "tamper-proof screws", can come in several forms. Security screws are thus known, the head of which has a particular shape which does not correspond to the imprints of standard keys, so that it is necessary to use a specific tool comprising a key of shape combined with the head of the screw. safety so that it can be released.
    This specific tool is generally present in the vehicle. However, it may happen that this tool is lost or damaged preventing the vehicle user from changing his wheel in the event of a puncture. The user must then call in a professional mechanic who will either have the right tool or will have to find a solution to remove this security screw. It can also happen that the specific impression shown by the screw head is damaged and therefore unusable, or that the tool is broken on the screw head and remains partially fixed on the latter so that the specific impression is no longer accessible.
    One of the solutions implemented by the mechanics to nevertheless loosen the screw, and therefore change the wheel, is to weld on the head of the safety screw another hexagonal head screw (standardized) in order to couple it in rotation with said screw. . The assembly thus formed then has a head which can be manipulated with standard tools for loosening the security screw.
    Unfortunately, this technique has drawbacks, including heat damage to the paints and varnishes of the rims or the risk of breaking the head of the safety screw if the latter has a fusible head.
    Finally, this technique is unsuitable for cases where the head of the safety screw is designed to rotate freely (crazy head) in the absence of a tool comprising the appropriate gripping means for said head as in the example of a safety device. described by document EP2228176.
    There are methods and tools for the extraction of broken screws as described for example in document EP0451256. Such extractors are in the form of a threaded rod
    BE2017 / 5246 with an inverted left-hand thread and generally of conical shape. They are inserted into a borehole made in the screw for the purpose of extracting the latter. Unfortunately, these solutions are not very suitable for removing safety screws and in particular safety screws used on vehicle wheels due to the fragility of their threads or their insufficient contact surface which does not allow torque to be applied. sufficient to loosen said screws. Indeed, the safety screws on the vehicle wheels can have a tightening torque of 160 N.m or more.
    There is therefore a need for a method and tools for the extraction of security screws which are adaptable to different kinds of security screws and which are also usable in cases where the screw is broken or damaged or when the head screw is fusible or designed to rotate freely. There is also a need for an extraction process and for tools which make it possible to extract a broken security screw, the implementation of which does not risk damaging the elements surrounding said screw. There is a need for a method and tools for the extraction of safety screws which are suitable for removing vehicle wheels and which are therefore capable of being able to be used in connection with screws of which the tightening torque is high.
    The object of the invention is to respond to at least one of the drawbacks presented by the prior art by proposing a method and tools for removing vehicle wheels which have a universal character in that they are capable of being used. on security screws of different models or which are broken.
    To this end, and according to a first aspect, the invention relates to a method of extracting a safety screw or a broken screw, said screw comprising a rod, the method being remarkable in that it comprises the following steps:
    a) drilling a bore in the screw in the longitudinal direction thereof by means of a drill with a diameter less than the diameter of the screw rod;
    b) fitting of an extractor into said bore, the extractor comprising a toothed rod whose toothing is in the form of longitudinal ribs and a head fixed to one end of said rod, the fitting being obtained by insertion of the rod of the extractor in said bore and by percussion on the head of said extractor by means of a percussion tool, so as to couple in rotation the extractor and the screw;
    c) extraction of the screw by loosening it by means of a key cooperating with the head of the extractor.
    According to particular embodiments, the method can include one or other of the following characteristics, taken in isolation or in all possible combinations:
    BE2017 / 5246
    Step (a) of drilling the bore includes the use of a drill comprising a tungsten carbide point.
    Step (a) of drilling the bore is preceded by a step of placing a centering device on the screw for positioning and guiding the drill.
    The extractor comprises a sleeve disposed at the base of the head, the sleeve having a diameter greater than that of the rod and less than that of the head so as to form a shoulder with the rod, and step (b) d 'fitting includes fitting the extractor rod into the screw until said shoulder is placed in abutment against the screw.
    The fitting step (b) includes the use of a striking mandrel placed between the extractor and the percussion tool and one end of which has an imprint of shape combined with that of the head of the extractor.
    Step (c) of extracting the screw is followed by a step (d) of detaching the extractor from the screw in which it has been inserted by using a release mandrel.
    As will have been understood on reading the definition which has just been given thereof, the invention consists in replacing the head of the safety or broken screw, the head of an extractor which can be handled by standard tools. To do this, the invention will couple the extractor in rotation with the screw to be loosened by forcing it into force in a bore made in said screw. The presence of the head and possibly of a sleeve on the extractor forming a shoulder limits the depression of the extractor in the screw by abutment of the head of the screw on the head of the extractor or on the shoulder formed by the sleeve. This limitation of the sinking of the extractor rod makes it possible to confine the extractor rod to the inside of the screw and not to risk coming to hang the hub of the wheel while allowing the fitting of a rod of considerable length in said screw.
    According to a second aspect, the invention relates to an extractor for the implementation of the method described above, for the extraction of a safety screw or a broken screw, remarkable in that it comprises a rod toothed whose teeth are in the form of longitudinal ribs, and a head fixed to one end of said rod, the head preferably being hexagonal.
    Preferably, the extractor comprises a sleeve disposed at the base of the head, the sleeve having a diameter greater than that of the rod and less than that of the head so as to form a shoulder with the rod. More preferably, the extractor is made of steel.
    The extractor according to the invention is remarkable in that it allows to have a straight fitting having a large contact surface with the screw to be loosened, allowing
    BE2017 / 5246 to apply a loosening torque of up to 160 N.m or more for loosening the screw. The fitting of the extractor up to the abutment of the head or the shoulder presented by the sleeve makes it possible on the one hand to be able to control the insertion length of the rod and of which constrain it not to exceed of the screw rod. On the other hand, the abutment makes it possible to avoid beating during the manipulation of the extractor which would harm its retention in the screw, the head or the sleeve being placed in abutment against the screw.
    According to a third aspect, the invention relates to a set of tools for implementing the method as described above, remarkable in that it comprises at least one extractor as defined above and one or more elements chosen from:
    - at least one drill with a diameter similar to the diameter of the rod of the extractor, for drilling a bore in the screw;
    - one or more centralizers for positioning and guiding the drills during drilling operations;
    - a striking mandrel for fitting the extractor into a bore drilled in the screw;
    - an extraction mandrel for detaching the extractor from the screw in which it is fitted.
    According to particular embodiments, the assembly according to the invention may include one or other of the following characteristics, taken in isolation or according to all possible combinations:
    - The set includes at least one drill and at least one of the drills has a tungsten carbide tip.
    - The assembly includes at least one centering device for positioning and guiding a drill, and at least one of the centering devices is in the form of a truncated cone crossed on either side, in its longitudinal direction, by a central conduit, said conduit having a diameter greater than that of the drill and / or of the rod of the extractor.
    - The assembly includes at least one centering device for positioning and guiding a drill, and in that at least one of the centering devices is in the form of a hollow socket, of cylindrical or frustoconical body traversed by a central duct of diameter greater than that of the drill and / or the rod of the extractor; said central conduit being in communication with an internal cavity opening onto one of the ends of the body, the mouth of the internal cavity being dimensioned to cover the screw head, preferably the centralizer present on its end opposite to that opening on the internal cavity, a protuberance reproducing the shape of the head of the extractor, said protuberance being traversed by said duct.
    BE2017 / 5246
    - The assembly includes at least one centering device, and at least one of the centering devices is in the form of a cylindrical body having on at least one of its ends an imprint of shape conjugated to a hexagonal screw head and traversed along its length by a central conduit, said conduit having a diameter greater than that of the drill and / or of the rod of the extractor. Preferably, the cylindrical body has two diametrically opposite dishes. More preferably, the centering device has an impression combined with a hexagonal screw head at each of its ends,
    Said footprints having different dimensions.
    - At least one of the centralizers is made of plastic material, preferably polyoxymethylene (POM).
    - The assembly includes a striking mandrel, and said striking mandrel has at one of its ends an imprint of shape conjugated to the head of the extractor.
    - The assembly comprises a stall chuck, said stall chuck having at one of its ends a fork comprising two teeth of increasing thickness between their tip and their base, and preferably the two teeth are parallel to each other, and the spacing between the teeth of the stall chuck is less than the diameter of the head of the extractor.
    According to a fourth aspect, the invention relates to the use of an extractor as defined above or of an assembly as defined above for the extraction of a safety screw or a broken screw on a wheel vehicle.
    The invention will be well understood and other aspects and advantages will appear clearly in the light of the description which follows, given by way of example with reference to the accompanying drawing plates in which:
    Figure 1 shows an extractor according to the invention.
    Figure 2 is a sectional view showing the step of drilling a safety screw by means of a drill and a centering device according to the invention.
    Figures 3 to 5 illustrate different centralizers according to the invention.
    FIG. 6 shows the step of fitting the extractor according to the invention.
    Figure 7 shows the stall chuck according to the invention.
    FIG. 8 shows the step of detaching the extractor from the screw in which it is fitted.
    In the following description, the term "understand" is synonymous with "include" and is not limiting in that it authorizes the presence of other elements in the device or the vehicle to which it relates. It is understood that the term "understand" includes the terms "consist of".
    BE2017 / 5246
    In the present specification, the method according to the invention will be described in parallel with the tools according to the invention for the implementation of said method.
    Reference will first be made to FIG. 1 in which is shown an extractor 1 used for implementing the method of extracting a screw such as a safety screw or a broken screw. The extractor 1 according to the invention comprises a toothed rod 3 whose toothing, in the form of protruding ribs 5, extends longitudinally along the length of the rod 3, so that a cross section of the rod shows a configuration in star. The extractor 1 also has a head 7 which is preferably hexagonal in shape so that it can be handled by standard keys. The extractor 1 is advantageously made of steel. The head 7 and the rod 3 are fixed to each other irreversibly so that when the rod 3 is inserted into the screw, the head can act as a stop to limit the penetration of the extractor and support to avoid beating during handling as we will see later.
    According to a preferred embodiment of the invention, the extractor 1 comprises a sleeve 9 disposed at the base of the head 7 and having a diameter greater than that of the rod 3 and less than that of the head 7 so as to form a shoulder 11 with the rod 3.
    The method according to the invention comprises the following stages:
    a) drilling a bore in the screw to be loosened in the longitudinal direction of the latter by means of a drill with a diameter less than the diameter of the screw rod;
    b) fitting of an extractor into said bore, the extractor comprising a toothed rod whose toothing is in the form of longitudinal ribs and a head fixed to one end of said rod, the fitting being obtained by insertion of the rod of the extractor in said bore and by percussion on the head of said extractor by means of a percussion tool so as to couple the extractor and the screw in rotation;
    c) extraction of the screw by loosening it by means of a key cooperating with the head of the extractor.
    Step a) of drilling a bore is shown in FIG. 2 in the context of the extraction of a safety screw 13 called "re-entrant" in that it is disposed at the bottom of a cavity presented by the rim 15 of the wheel. This step therefore comprises the drilling of a bore 17 in the screw 13 to be loosened in the longitudinal direction thereof by means of a drill bit 19 of diameter less than the diameter of the rod 21 of the screw 13. In the figure, the safety screw is shown with a round head 23. The drilling operation is in progress so that the bore has not yet reached the screw stem. However, in the method according to the invention the rod of the screw is hollowed out according to all or part of its length. For example the length of the bore
    BE2017 / 5246 practiced in the screw is greater than 10 mm, for example between 10 and 20 mm depending on the screw models considered. This length of the bore will make it possible to receive an extractor whose rod has a corresponding length and which therefore offers a large contact surface. This large contact surface will allow the application of sufficient torque to loosen the screw.
    The drilling is carried out by means of a drill bit 19. Preferably, the step (a) of drilling the bore is carried out by means of a drill bit comprising a tungsten carbide point. Such a drill can for example be obtained by slitting the tip of a traditional steel drill to insert a tungsten carbide insert. The use of such a drill makes it easier to drill the safety screws when they are made of hardened steel.
    According to the invention, the diameter of the drill bit is equal to the diameter of the extractor rod so that the extractor rod can be fitted and retained in the bore hollowed out in the screw.
    It will be understood that the bore 17 must be central relative to the head 23 of the screw since it then extends into the rod 21 of this screw. Also according to a preferred embodiment of the invention, and as shown in FIG. 2, step (a) of drilling the bore is carried out using a centering device 25 for positioning and guiding the drill.
    Depending on the type of screw to loosen, this centering device can come in different forms. In the case illustrated in FIG. 2 where the screw is a so-called "re-entering" screw because it is positioned at the bottom of a cavity presented by the rim, the "re-entering screw" centering device 25 will advantageously be in the form of a truncated cone pierced with a central conduit passing through it on both sides in its longitudinal direction. Such a centering device is shown in FIG. 3. The duct 27 has a diameter greater than that of the drill and has the function of positioning and guiding this drill.
    FIG. 4 shows another embodiment of a centering device 29 according to the invention intended for centering and guiding the drill in the case of so-called “outgoing” screws, in that they appear in relief on the rim. The centering device 29 “with outgoing screws” will then be in the form of a hollow socket, of cylindrical or frustoconical body 31, and traversed by a central duct 35 in communication with an internal cavity 33 opening onto one of the ends of the body 31. Preferably, the internal cavity 33 has an internal conical shape so that its diameter decreases along its length from its mouth. This configuration will allow the centering device to cover the screw head and be retained on it. The central conduit 35 with a diameter greater than that of the drill rod (and therefore of the extractor rod) is used for positioning and guiding said drill. Preferably, the centralizer 29 has at the end opposite to that opening on the internal cavity 33 a protuberance 37 reproducing the shape of the head of the extractor, said protuberance 37 being traversed by said
    BE2017 / 5246 conduit 35. This protrusion 37 allows the user to use a striking mandrel to position and drive the centering device 29 on the head of the screw.
    In cases where the head of the screw is mounted to rotate freely (mad head), the skilled person will benefit from using a fingerprint centering device 39 as shown in FIG. 5. This fingerprint centering device is in the form of 'a cylindrical body socket 41, and having on at least one of its ends an imprint 43 of shape conjugated to a hexagonal screw head. The body 41 has a central duct 45 passing through it on either side in its longitudinal direction. The conduit 45 has a diameter greater than that of the drill rod (and therefore of the extractor rod) and is used for positioning and guiding the drill. The impression 43 will hold the head in position and prevent it from turning under the action of the drill during the drilling operation. Preferably, the body 31 has two diametrically opposite dishes 47 to facilitate gripping and retaining in position of the centering device. More preferably, the centralizer has an imprint conjugated to a hexagonal screw head at each of its ends, said imprints having different dimensions.
    According to a preferred implementation of the invention, at least one of the centralizers is made of plastic material, for example polyoxymethylene (POM) to limit the risks of damaging the paint and varnish of the rims. However, it is also possible to make them from metallic materials.
    Once the bore has been made, the extractor according to the invention can be put in place. To do this, the extractor rod is forcibly fitted into said bore during a fitting step b) illustrated in FIG. 6. The fitting is done by longitudinal sliding along the bore and this sliding is generated by percussion on the head of the extractor by means of a percussion tool, for example a hammer. The insertion of the extractor into the screw will rotate the extractor and the screw.
    According to a preferred embodiment of the invention, the fitting step (b) is carried out by placing a striking mandrel 51 between the extractor 1 and the hammer 49. The striking mandrel 51 according to the invention comprises a end having an imprint 53 of shape combined with that of the head 7 of the extractor 1. The use of such a mandrel makes it possible to hold the extractor in position for its fitting.
    Advantageously, the extractor 1 is fitted until the base of its head abuts against the head 27 of the screw, or when the extractor has a sleeve 9 against the shoulder 11 formed by the sleeve 9 with the rod 3. This limitation of the insertion of the extractor 1 makes it possible to ensure that the rod 3 of the latter remains in the rod 21 of the screw 13. In
    BE2017 / 5246 Indeed, if the extractor rod protruded from the end of the screw rod, it would catch on the wheel hub which would make loosening the screw more difficult.
    Once the extractor in position, the extraction of the screw by loosening it is carried out during a stage c) of extraction (not shown) by means of a key cooperating with the head of the extractor . The straight character of the fitting associated with the extended contact surface makes it possible to obtain a loosening torque at least equal to 160 N.m, necessary for loosening the safety screws of the vehicle wheels.
    According to a preferred embodiment of the invention, step (c) of extracting the screw is followed by a step (d) of detaching the extractor from the screw in which it has been fitted, preferably by use of a release mandrel 55 as shown in FIG. 7. The separation of the screw 13 and the extractor 1 makes it possible to be able to reuse said extractor 1 for the extraction of another screw 13. The operation of stalling can be achieved when the extractors 1 have a sleeve 9 defining a space between the head 23 of the screw 13 and the head 7 of the extractor 1.
    Preferably, the stall mandrel 55 has at one of its ends a fork 57 comprising two parallel teeth 59 of increasing thickness between their tip 61 and their base 63. The spacing between the teeth 59 of the stall mandrel 55 is chosen for be greater than the diameter of the sleeve 9 and less than the diameter of the head 7 of the extractor. In the case where the stall chuck is used with an extractor having no sleeve, the spacing between the teeth of the stall chuck must be greater than the diameter of the rod of said extractor.
    Step d) is illustrated in FIG. 8. As can be seen, the screw 13 is held by the jaws 65 of a vice. The stall chuck 55 is positioned so as to place the sleeve of the extractor 1 between its teeth 59. The sleeve is then pressed between the teeth
    59 of the fork by percussion. The teeth 59 having an increasing height which, at the base of said teeth is greater than the height of the sleeve, the depression of the extractor 1 will lift said extractor 1 to cause it to come out partially from the screw 13.
    BE2017 / 5246
    权利要求:
    Claims (9)
    [1]
    1. Method for extracting a safety screw or a broken screw, said screw (13) comprising a rod (21) and possibly a head (23), the method being characterized in that it comprises the steps following:
    a) drilling a bore (17) in the screw (13) in the longitudinal direction thereof by means of a drill (19) of diameter less than the diameter of the rod (21) of the screw (13) ;
    b) fitting of an extractor (1) into said bore (17), the extractor (1) comprising a toothed rod (3) whose toothing is in the form of longitudinal ribs (5) and a fixed head (7) at one of the ends of said rod (3), the fitting being obtained by insertion of the rod (3) of the extractor (1) in said bore (17) and by percussion on the head (7) of said extractor (1 ) by means of a percussion tool (49), so as to rotate the extractor (1) and the screw (13);
    c) extraction of the screw (13) by loosening it by means of a key cooperating with the head (7) of the extractor.
    [2]
    2. Method according to claim 1 characterized in that step (a) of drilling the bore (17) comprises:
    - the use of a drill (19) comprising a tungsten carbide point, and / or
    - is preceded by a step of placing a centering device (25, 29, 39) on the screw (13) for positioning and guiding the drill bit (19).
    [3]
    3. Method according to one of claims 1 or 2 characterized in that:
    - the extractor (1) comprises a sleeve (9) disposed at the base of its head (7) and having a diameter greater than that of its rod (3) and less than that of its head (7) so as to form a shoulder (11) with the rod (3) and in that the fitting step (b) comprises fitting the rod (3) of the extractor (1) into the screw (13) up to that said shoulder (11) is placed in abutment against the screw (13); and or
    - the fitting step (b) comprises the use of a striking mandrel (51) disposed between the extractor (1) and the percussion tool (49) and one end of which has an imprint (53) of form combined with that of the head (7) of the extractor (1).
    BE2017 / 5246
    [4]
    4. Method according to one of claims 1 to 3 characterized in that the step (c) of extraction of the screw (13) is followed by a step (d) of detaching the extractor (1) from the screw (13) into which it has been fitted using a release mandrel (55).
    [5]
    5. Extractor (1) for implementing the method according to one of claims 1 to 4, characterized in that it comprises a toothed rod (3) whose toothing (5) is in the form of ribs (5 ) longitudinal, and a head (7) fixed to one end of said rod (3), the head (7) being preferably hexagonal.
    [6]
    6. Extractor (1) according to claim 5 characterized in that it further comprises a sleeve (9) disposed at the base of the head (7), the sleeve having a diameter greater than that of the rod (3) and lower than that of the head (7) so as to form a shoulder (11) with the rod (3).
    [7]
    7. Set of tools for implementing the method according to one of claims 1 to 4, characterized in that it comprises at least one extractor (1) according to one of claims 5 or 6 and one or more elements chosen from:
    - at least one drill (19) of diameter similar to the diameter of the rod (3) of the extractor (1), for drilling a bore (17) in the screw (13), preferably at least one of the drills (19) has a tungsten carbide tip;
    - one or more centralizers (25, 29, 39) for positioning and guiding the drills (19) during drilling operations, preferably at least one of the centralizers (25) is in the form of a truncated cone traversed by on both sides, in its longitudinal direction, by a central conduit (27), said conduit (27) having a diameter greater than that of the drill (19), more preferably at least one of the centralizers (29) is present under shape of a hollow socket, of cylindrical or frustoconical body traversed by a central duct (35) of diameter greater than that of the drill (19), said central duct (35) being in communication with an internal cavity (33) opening onto a of the ends of the body (31), the mouth of the internal cavity being sized to cover the screw head, more preferably at least one of the centralizers (39) is in the form of a cylindrical body (41), and having on at least one of its ends u indentation (43) of shape conjugated to a hexagonal screw head and traversed along its length by a central conduit (45), said conduit (45) having a diameter greater than that of
    BE2017 / 5246 drill (19), even more preferably at least one of the centralizers (25, 29,
    39) is made of plastic material;
    - a striking mandrel (51) for fitting the extractor (1) into a bore (17) drilled in the screw (13), preferably said striking mandrel (51)
    5 has at one of its ends an imprint (53) of shape conjugated to the head (7) of the extractor (1);
    - An extraction mandrel (55) for detaching the extractor (1) from the screw (13) in which it is fitted, preferably said detachment mandrel (55) has a fork (57) at one of its ends )
    [8]
    10 comprising two teeth (59) of increasing thickness between their tip (61) and their base (63) and preferably parallel to each other, and in that the spacing between the teeth (59) of the release chuck (55) is less than the diameter of the head (7) of the extractor (1).
    [9]
    15 8. Use of an extractor (1) according to one of claims 5 or 6 or a set of tools according to claim 7 for the extraction of a safety screw or a broken screw on a vehicle wheel.
    BE2017 / 5246
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    FR2766163A1|1999-01-22|Easily extracted bottle cork and its extractor
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    同族专利:
    公开号 | 公开日
    DE16315008T1|2019-01-03|
    TW201815525A|2018-05-01|
    US20180071903A1|2018-03-15|
    EP3292958B1|2019-11-20|
    FR3055823B3|2018-12-07|
    ES2774470T3|2020-07-21|
    BE1024703A1|2018-05-29|
    US10478952B2|2019-11-19|
    DK3292958T3|2020-03-02|
    FR3055823A3|2018-03-16|
    EP3292958A1|2018-03-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1875484A|1932-09-06|Schew extractor |
    US1798944A|1930-09-11|1931-03-31|Elmer F Jackman|Tool for removing broken stud bolts and the like|
    US6098499A|1998-07-16|2000-08-08|The Lisle Corporation|Bolt extraction tool|
    US20030059267A1|2001-09-26|2003-03-27|Simp'l Product, Inc.|Guides for centering screws and drill bits in countersink holes|
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    DE102011050671A1|2011-05-27|2012-11-29|Wohn-t-räume UG |Auxiliary tool for hammering in nails|
    DE102012104298A1|2012-05-18|2013-11-21|Hafu Werkzeugfabrik H. J. Fuhrmann Gmbh|Tool for loosening screw, has engaging end which is inserted in inner hexagon contour, where engaging end has cutting edges which intersect corners of engagement contour in general purpose near peaks|
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    US5031487A|1989-11-02|1991-07-16|Alden Corporation|Broken bolt extractor|
    US5649791A|1994-05-17|1997-07-22|Connolly; Matthew|Apparatus and method for boring a hole in a broken bolt|
    US6575057B1|2002-04-18|2003-06-10|Lisle Corporation|Broken heater hose coupler removal tool and method of use|
    US7007573B2|2004-05-12|2006-03-07|Eazypower Corporation|Impact driver and fastener removal device|
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    IT1393210B1|2009-03-11|2012-04-11|Groppo|ANTI-THEFT LOCKING DEVICE AND ITS IMPLEMENTATION METHOD.|
    US9839995B2|2011-09-26|2017-12-12|Magna Industries, Inc.|Drain removal tool|CA3107709A1|2018-08-21|2020-02-27|Grip Holdings Llc|Fastener extractor device|
    USD878882S1|2018-08-29|2020-03-24|Chia-Hao Huang|Bolt extractor|
    法律状态:
    2018-07-25| FG| Patent granted|Effective date: 20180607 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP16315008.9A|EP3292958B1|2016-09-09|2016-09-09|Method for extracting safety screws and extractor for implementation of the method|
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