(19)
(11)EP 3 321 034 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
29.07.2020 Bulletin 2020/31

(21)Application number: 16726349.0

(22)Date of filing:  05.05.2016
(51)International Patent Classification (IPC): 
B25B 23/10(2006.01)
(86)International application number:
PCT/ES2016/070344
(87)International publication number:
WO 2016/177928 (10.11.2016 Gazette  2016/45)

(54)

WRENCH TYPE TOOL FOR THE MOUNTING OF STUDS AND SIMILAR ITEMS

WERKZEUG FÜR DIE MONTAGE VON STIFSCHRAUBENUN ÄHNLICHE ARTIKEL

OUTIL POUR LE MONTAGE DE GOUJONS ET DES ARTICLES SIMILAIRES


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 07.05.2015 ES 201530624

(43)Date of publication of application:
16.05.2018 Bulletin 2018/20

(73)Proprietor: Petri Larrea, Guillermo
31002 Pamplona Navarra (ES)

(72)Inventor:
  • Petri Larrea, Guillermo
    31002 Pamplona Navarra (ES)

(74)Representative: de Arpe Fernandez, Manuel 
Arpe Patentes y Marcas, S.L.P. C/Proción, 7 Edif. América II Portal 2, 1° C
28023 Madrid-Aravaca
28023 Madrid-Aravaca (ES)


(56)References cited: : 
US-A- 1 536 320
US-A- 2 351 232
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Scope and prior art



    [0001] The invention generally relates to a wrench type tool intended for the mounting of studs/bolts, threaded rods and similar items and, more specifically, to securely hold in place or maintain the tightening torque applied to the stud/bolt when such tool is removed from the stud which has been already mounted at the relevant connection of parts.

    [0002] As any person skilled in the art may know, a stud/bolt is a set screw comprising two fully or partially threaded ends, which is used to couple two pieces that must be held together under a specific torque. Such studs/bolts may show different configurations, as it is sufficiently known in the current art.

    [0003] A technical problem arisen when a stud/bolt is mounted by means of a wrench type tool relates to the maintenance of the position and/or torque desired for the connection, since the studs/bolts are dragged during the removal of the tool, and this entails their unfastening or the loss of the desired position.

    [0004] As it is widely known, during the removal of the mounting tool it is possible to hold the stud in position, either manually or with the help of a flange-type tool, thus preventing the undesired unfastening/loss of the position adjusted during the assembly stage. Frequently, to ensure that the stud/bolt remains in position once the fastening tool has been removed, the free ends of these studs/bolts are machined, adopting different finishes, which entails an increase in the manufacturing costs of the stud/bolt. Figures 1A to 1E show different examples of studs/bolts that have been machined to allow them to remain in position during the removal of the tightening tool according to the current art.

    [0005] Document ES U234480 discloses a tool for the removal of studs and similar elements which could also be used for the assembly operation, comprising a socket piece for its coupling to the stud and bullet-shaped pressure means that can be clamped along the lateral surface of the stud, during the removal operation, or released once the stud has been removed. The use of this applies a pressure on the stud thread, which could eventually damage such thread.

    [0006] Furthermore, a tool is known in the market, which is used to remove stud, threaded rods, screws with damaged heads, etc., sold by the company WURTH. This tool comprises a tube with an unfastening end where the unfastening torque is applied, as well as an eccentric connection which enters the tube and presses against the surface of the stud. In this case, the thread may also be damaged, impairing, or even preventing, the subsequent use of the said stud. Similar tools are disclosed in documents US2351232 and US1536320.

    Object of the invention



    [0007] On the basis of the aforementioned state of the art, one object of the invention is to develop a wrench type tool which allows to solve the problem arisen, ensuring that, when it is removed from the already mounted stud/bolt, the position and/or torque applied to such stud/bolt are not modified, and that the fastening force/torque is only applied axially, to uniformly distribute the torque along the threaded section of the stud.

    [0008] This objective is achieved by means of the characteristics listed in claim 1. Other advantages and objectives are achieved by means of the characteristics mentioned in the dependent claims.

    [0009] According to the invention, a wrench type tool for the mounting of studs and similar items is provided, the technical characteristics of which are disclosed in the independent claim 1.

    [0010] Alternatively, and according to an additional characteristic, it is advantageous that the fourth portion of the cylindrical upper section is threaded with a second thread pitch which is smaller than the first thread pitch, and that the transmission piece comprises an outer thread, so that it can be screwed to the fourth portion of the cylindrical upper section.

    [0011] According to an additional characteristic of the invention, the pin of the transmission element and the said transmission element have been provided as separate pieces.

    [0012] Also according to the invention it is advantageous that the upper end of the transmission element is arranged as a hub, to allow the coupling of tightening tools, such as a manually-operated, electrical, or pneumatic tools.

    [0013] According to yet another additional characteristic of the invention, it is advantageous that the free end of the end stem of the centering stop is arranged to tightly fit against the end of the stud to be mounted. In this case, it is specially advantageous that the free end of the end stem of the centering stop is configured with a concave, convex or flat shape, or with a flat shape with a central tip or a conical tip, that can be tightly fitted to a stud/bolt respectively, manufactured by hot pressing, cold pressing, saw-cutting, machining and shearing.

    Brief description of the drawings



    [0014] Other characteristics and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, referring to an embodiment of the invention, wherein the following has been represented, without limitation:

    Figure 1 shows different arrangements of studs/bolts machined in accordance with the prior art, to allow the coupling of flanges or clamping tools used to secure the position and/or the torque applied, using stud mounting tools according to the prior art.

    Figure 2 shows an exploded elevation of a partial sectional view of a wrench type tool according to a first embodiment of the invention.

    Figure 3 shows an exploded elevation of a partial sectional view of a wrench type tool according to a second embodiment of the invention.

    Figures 4 to 6 respectively show exploded elevations of partial sectional views of a wrench type tool according to figure 3, mounted and in different operating positions.

    Figures 7A to 7E show alternative arrangements of the centering stop of the tool according to figures 2 and 3, which have been adapted for their coupling to the different available arrangements of the end of the stud/bolt to be mounted.


    Detailed description of the preferred embodiments



    [0015] As it can be appreciated in the figures, the wrench type tool according to the invention, which is generally designated by reference numeral (1), comprises a coaxial assembly with a mouth portion (2) wherein the stud (E) to be mounted is coupled, a transmission element to convey the tightening force/torque (3) and a centering stop (4) arranged so that it can slide inside the mouth portion, to lock/unlock the stud through the operation of the transmission element (3) with the help of coupling/uncoupling means (5) that are correspondingly provided, at it will be explained in more detail hereinafter.

    [0016] In a first embodiment of the invention, as it can be appreciated in greater detail in figure 2, the exterior part of the mouth element (2) respectively comprises cylindrical mouth (20) and neck (21) portions, coaxially arranged, with an inner through compartment (22) extending between such mouth and neck portions. The said inner compartment (22) comprises, following an axial symmetric pattern relative to one axis, (X):
    1. a) a threaded cylindrical lower section (220) with a first radius (R1) and a first thread pitch (P1) which can be coaxially screwed at least to one threaded end (E1) of the stud to be mounted;
    2. b) an intermediate section (221) comprising a first tapered portion (2210) extending from the upper part of the lower section (220), and then, a second cylindrical portion (2211) with a second radius (R2) which is smaller than the first radius (R1); and
    3. c) an upper cylindrical section (223) comprising a third cylindrical portion (2230) with a third radius (R3) which is larger than the second radius, but smaller than the first radius (R1) and then, a fourth cylindrical portion (2231) with a fourth radius (R4) which is larger than the third radius, but smaller than the first radius.


    [0017] As shown in the figures, the transmission element (3) comprises an upper end (30) wherein the tightening force/torque is applied, and a lower end (31) to convey such force to the stud to be mounted. It can be also seen that, according to an advantageous embodiment, the said upper end (30) is arranged as a hub (33) wherein a tightening tool, for instance, a manually operated, electrical or pneumatic tools can be coupled.

    [0018] The figures show that the centering stop (4) comprises a head (40), of an appropriate size to tightly rest on the third portion (2230) of the upper section (223) of the mouth portion (2) and an end stem (41) extending from the intermediate section (221) to the lower section (220) of the said mouth portion (2), so that, thanks to its axial movement, it ends may rest against the end (E1) of the stud (E) to be mounted.

    [0019] According to the invention, the coupling/uncoupling means (5), comprise an assembly formed by an orthogonally arranged pin (32) protruding from the side surface of the transmission element, (3) and an oblong hole (23) inclined on the neck section (21) of the mouth element (2) wherein the pin may slide within said hole (23) as it will be explained in greater detail hereinafter. However, according to the invention, the said coupling/uncoupling means (5) may be configured according to an any other arrangement, provided that their rotation in a first direction of rotation (G1) allows that the lower end (31) of the transmission element (3) rests against the head (40) of the centering stop (4), moving it so that the end stem (41) is resting against the stud (E) and the tightening force/torque applied on the upper end (30) of the transmission element is conveyed to the mouth element (2) wherein such stud has been screwed; and that the rotation of the said coupling/uncoupling means (5) in a second direction of rotation (G2), which is opposite to the first direction of rotation allows that the transmission element (3) no longer rests against the centering stop (3), so that such centering stop no longer presses the stud to be mounted and the untigthening torque applied to the transmission element is applied to the mouth element, thus unscrewing the stud.

    [0020] As it can be seen in Figures 7A to 7E, according to the invention, the free end of the end stem (41) of the centering stop (4) is arranged so that it is tightly fitted against the end (E1) of the stud (E) to be mounted. Thus, its end (410) may be either concave or convex, for hot- or cold-pressed studs/bolts, as it is shown in figures 7A and 7B, respectively, or flat, with a small tip for machined studs/bolts, as shown in figure 7C, or completely flat, for saw-cut studs/bolts, as it has been represented in figure 7D, or completely conical, for sheared studs/bolts, as shown in figure 7E.

    [0021] Figure 3 shows a second embodiment of the invention, which differs from the embodiment shown in figure 2 only because the fourth portion (2231) of the cylindrical upper section (223) is threaded with a second thread pitch (P2) which is smaller than the first thread pitch (P1) and the transmission element (3) is threaded, so that it can be coupled to the said thread with the second thread pitch of said fourth portion (2231) of the cylindrical upper section (223).

    [0022] Figure 4 shows the so-called "neutral" position of the tool (1) according to the second embodiment of the invention, which has not been still applied to the stud (E) to be mounted. It can be appreciated that the transmission element (3) is partially screwed within the third portion (2231) of the mouth element (2), so that its lower end is facing, but without being in contact with, the head (40) of the centering stop (4) and being the end stem (41), passing through the intermediate section (221) of the mouth element (2) scarcely penetrating by its free end inside the lower section (220) of said mouth element.

    [0023] In connection with figures 4 to 6, referring to the second embodiment according to figure 3, the operation of the wrench type tool according to the invention will be explained in the following paragraphs as applied to the first embodiment shown in figure 2.

    [0024] Starting from the neutral position of then tool, as shown in figure 4, with the rotation of the transmission element (3) following a first direction of rotation (G1), as shown in figure 5, the said element moves forward, so that its pin (32) butts against one end of the oblong hole (23) of the mouth portion (2) so that the said mouth element is pulled by the transmission element following such direction of rotation and, consequently, the mouth element (2) will be screwed on the threaded end (E1) of the stud to be mounted; furthermore, the forward movement of the transmission element makes that the centering stop (40) moves so that its end stem (41) is pressed against the stud (E) to be mounted. This way, the transmission element (3) becomes rotably engaged to the stud to be mounted, and the tightening torque applied to its upper section (30) may be conveyed to the stud to be mounted, thanks to the friction clutch between the centering stop (4) and the stud (E). In this case, it should be mentioned that, thanks to the coaxial arrangement according to the (X) axis, no loads, except coaxial loads, are generated during the mounting operation, so that the tightening torque is uniformly distributed along the threading of the stud, which is critical in the case of torque and torque-and-angle assemblies.

    [0025] Once the stud has been mounted, as an assembly of elements (not shown), the tool (1) according to the invention may be removed or detached from the stud without causing the untightening/displacement of such stud/bolt. Thus, as shown in figure 6, when the transmission element (3) rotates following the second direction of rotation (G2), it no longer presses against the centering stop (4) so that such centering stop does no longer forcibly rest against the already mounted stud (E), and consequently, such rotation is no longer conveyed to said stud, and when the transmission element (3) continues with its rotation following said second direction of rotation (G2), its pin (32) butts against the opposite end of the oblong hole (23), so that the mouth element (2) is pulled and unscrews from the already mounted stud (E), as previously mentioned, without exerting any unfastening torque on the mounted stud.

    [0026] In the case of the second embodiment according to figure 3, this operation is possible because the second thread pitch (P2) of the threaded coupling of the torque transmission element (3) is smaller than the first thread pitch (P1) of the threaded coupling of the lower portion (220) of the mouth element (2) and the threaded end (E1) of the stud to be mounted, and because the tightening force/torque has an axial component, apart from the fastening torque.


    Claims

    1. A wrench type tool for the mounting of studs and similar elements, intended for the mounting of a stud (E) or similar item, comprising, at least, one end (E1) which is fully or partially threaded, such tool (1) wherein:

    - a mouth element (2) is provided, which externally shows coaxially arranged mouth (20) and neck (21) cylindrical portions, respectively, with an inner through compartment (22) extending between such mouth and neck portions following an axial symmetric pattern relative to one axis (X) said inner compartment comprising:

    a) a threaded cylindrical lower section (220) with a first radius (R1) and a first thread pitch (P1), which can be coaxially screwed at least to one of the threaded ends of the stud to be mounted;

    b) an intermediate section (221) comprising a first tapered portion (2210) extending from the upper part of the first section, and a second cylindrical portion (2211) with a second radius (R2) which is smaller than the first radius (R1);

    c) an upper cylindrical section (223) with a third cylindrical portion (2230) comprising a third radius (R3) which is larger than the second radius, but smaller than the first radius (R1) and then, a fourth cylindrical portion (2231) with a fourth radius (R4) which is larger than the third radius, but smaller than the first radius;

    - a transmission element (3) which conveys the fastening force/torque, and which can be axially moved within the fourth portion (2231) of the upper cylindrical section (223) is provided and the said transmission element comprising an upper end (30) wherein the tightening force/torque is applied, and a lower end (31) to convey such force to the stud to be mounted;

    - a centering stop (4) arranged to move in an axial direction (X) has been provided, comprising a head (40) of an appropriate size to tightly rest on the third portion (2230) of the upper section (223) and an end stem (41) extending from the intermediate section (221) to the lower section (220) so that its end may rest under torque on the stud (E) to be mounted; and

    - a series of coupling/uncoupling means (5) have been provided, that, by rotating following a first rotation direction (G1) allow that the lower end (31) of the transmission piece (3) rests against the head (40) of the centering stop (4), moving it so that the end stem (41) is resting against the stud (E) under torque, and the fastening force/torque applied on the upper end (30) of the transmission element is conveyed to the mouth element (2) wherein such stud has been screwed;

    while the rotation of the said coupling/uncoupling means (5) following a second direction of rotation (G2), which is opposite to the first direction of rotation, allows that the transmission element (3) no longer rests against the centering stop (3), so that such centering stop no longer presses the stem, and the untightening torque applied to the transmission element is applied to the mouth element, thus untightening it from the stud;
    wherein the coupling/uncoupling means (5) comprise an assembly consisting of an orthogonally arranged pin (32) protruding from the side surface of the transmission element (3), and an oblong hole (23) inclined on the neck section (21) of the mouth element (2), wherein the said pin can slide; and
    wherein the upper end (30) of the transmission element (3) is arranged as a hub for the coupling of the tightening tools.
     
    2. A wrench tool according to claim 1, wherein the fourth portion (2231) of the upper cylindrical section (223) of the mouth element is threaded with a second thread pitch (P2) which is smaller than the first thread pitch (P1) and the transmission element (3) used to convey the tightening force/torque is provided with a thread for the coupling of the said fourth portion (2231) to the said thread with the second thread pitch.
     
    3. A wrench type tool according to claim 1, wherein the transmission element (3) and its protruding pin (32) are provided as separate pieces.
     
    4. A wrench type tool according at least to one of the preceding claims 1 to 3, wherein the free end of the end stem (41) of the centering stop (4) has been arranged to tightly fit into the end of the stud (E) to be mounted.
     
    5. A wrench type tool according to claim 4, wherein the free end of the end stud (41) of the centering stop (4) is arranged with a concave, convex or flat shape, or with a flat shape with a central tip or a conical tip, that can be tightly fitted to a stud/bolt respectively, manufactured by hot pressing, cold pressing, saw-cutting, machining and shearing.
     


    Ansprüche

    1. Ein schraubschlüsselartiges Werkzeug für das Anbringen von Stehbolzen und ähnlichen Elementen, vorgesehen für das Anbringen von einem Stehbolzen (E) oder einer ähnlichen Einheit, Werkzkeug, das mindestens ein komplett oder teilweise mit Gewinde versehenes Ende (E1) aufweist, dieses Werkzeug (1), bei dem:

    - ein Mundstück (2) vorgesehen ist, das aussen, koaxial angeordnet einen zylinderförmigen Mundabschnitt (20) beziehungsweise einen zylinderförmigen Halsabschnitt (21) aufweist mit einem durchgehenden Innenraum (22), der sich zwischen diesen Mund- und Halsbabschnitten in einer axial symmetrischen Form mit Bezug auf eine Achse (X) erstreckt, wobei besagter Innenraum Folgendes umfasst:

    a) einen mit Gewinde versehenen, zylinderförmigen, unteren Abschnitt (220) mit einem ersten Radius (R1) und einer ersten Gewindesteigung (P1), Abschnitt, der koaxial an mindestens eins der Gewindeenden des anzubringenden Stehbolzen angeschraubt werden kann;

    b) einen Zwischenabschnitt (221), der einen ersten kegelförmigen Teil (2210) aufweist, der sich ab dem oberen Teil des ersten Abschnitts erstreckt und einen zweiten zylinderförmiger Teil (2211) mit einem zweiten Radios (R2), der kleiner ist als der erste Radius (R1);

    c) einen oberen, zylinderförmigen Abschnitt (223), mit einem dritten zylinderförmigen Teil (2230), der einen dritten Radius (R3) aufweist, der grösser ist als der zweite Radius, aber kleiner als der erste Radius (R1), und dann einen vierten zylinderförmigen Teil (2231) mit einem vierten Radius (R4), der grösser ist als der dritte Radius aber kleiner als der erste Radius:

    - ein Übertragungselement (3) vorgesehen ist, das die Anziehkraft/die Drehkraft weiterleitet und axial innerhalb des vierten Teils (2231) des oberen, zylinderförmigen Abschnitts (223) bewegt werden kann, und wobei besagtes Übertragungselement ein oberes Ende (30) aufweist, an dem die Anziehkraft/die Drehkraft angelegt wird, und ein unteres Ende (31) zur Weiterleitung dieser Kraft auf den anzubringenden Stehbolzen;

    - einen Zentrieranschlag (4) vorgesehen ist, der so angeordnet ist, dass er in einer axialen Richtung (X) bewegt wird, Anschlag, der einen Kopfteil (40) einer passenden Grösse aufweist, um dichtschliessend am dritten Teil (2230) des oberen Abschnitts (223) anzuliegen, und eine Endwelle (41), die sich vom Zwischenabschnitt (221) zum unteren Abschnitts (220) ausdehnt, so dass ihr Ende unter der Drehkraft am zu montierenden Stehbolzen /E) anliegt; und

    - eine Reihe von Kupplungs-/Entkopplungsmitteln (5) vorgesehen ist, die bei Drehung in einer ersten Drehrichtung (G1) erlauben, dass das untere Ende (31) des Übertragungselements (3) gegen den Kopfteil (40) des Zentrieranschlags (4) anliegt und diesen so bewegt, dass die Endwelle (41) unter der Drehkraft an dem Stehbolzen (E) anliegt, und die Anziehkraft/Drehkraft, die am unteren Ende (30) des Übertragungselements aufgetragen wird, wird zum Mundstück (2) weitergeleitet, an dem dieser Stehbolzen angeschraubt ist;während die Drehung dieser Kupplungs-/Entkopplungsmittel (5) in einer zweiten Drehrichtung (G2), die der ersten Drehrichtung entgegengesetzt ist, erlaubt, dass das Übertragungselement (3) nicht mehr gegen den Zentrieranschlag (4) anliegt, so dass dieser Zentrieranschlag aufhört, einen Druck auf die Welle auszuüben, und die an dem Übertragungselement angelegte Löskraft wirkt auf das Mundstück, so dass dieses vom Stehbolzen gelöst wird;

    bei dem die Kupplungs-/Entkopplungsmittel (5) eine Baugruppe aufweisen, die sich aus einem senkrecht ausgerichteten Zapfen (32), der aus der Seitenfläche des Übertragungselements (3) hervorragt, und einem Langloch (23) zusammensetzt, das am Halsabschnitt (21) des Mundstücks (2) geneigt ist, wobei besagter Zapfen gleitbar ist; und bei dem das obere Ende (30) des Übertragungselements (3) wie eine Nabe für das Ankuppeln der Spannwerkzeuge angeordnet ist.
     
    2. Ein schraubschlüsselartiges Werkzeug gemäss Anspruch 1, bei dem der vierte Teil (2231) des oberen, zylinderförmigen Abschnitts (223) des Mundstücks mit einer zweiten Gewindesteigung (P2), die kleiner ist als die erste Gewindesteigung (P1), verschraubt wird, und das Übertragungselement (3), das zur Weiterleitung der Anziehkraft/Drehkraft benutzt wird, ist mit einem Gewinde für die Kupplung dieses vierten Teils (2231) mit diesem Gewinde mit der zweiten Gewindesteigung vorgesehen ist.
     
    3. Ein schraubschlüsselartiges Werkzeug gemäss Anspruch 1, bei dem das Übertragungselement (3) und der herrausragende Zapfen (32) als separate Teile vorgesehen sind.
     
    4. Ein schraubschlüsselartiges Werkzeug gemäss mindestens einem der vorhergehenden Ansprüche 1 bis 3, bei dem das freie Ende der Endwelle (41) des Zentrieranschlags (4) so angeordnet ist, dass es dichtschliessend in das Ende des zu montierenden Stehbolzens (E) eingepasst wird.
     
    5. Ein schraubschlüsselartiges Werkzeug gemäss Anspruch 4, bei dem das freie Ende des Endbolzens (41) des Zentrieranschlags (4) mit einer konkaven, konvexen oder flachen Form angeordnet ist, oder mit einer flachen Form mit einer Zentralspitze oder einer Kegelspitze, die dicht an einem Ansatz beziehungsweise Bolzen befestigt werden kann, der mittels Warmpressen, Kaltpressen, Durchsägen, Formgebung oder Abscheren hergestellt wird.
     


    Revendications

    1. Un outil de type clé (1) pour le montage de goujons et éléments analogues, conçu pour monter un goujon (E) ou une pièce similaire, comprenant, au moins, une des extrémités (E1) totalement ou partiellement filetée, où:

    - un élément d'ouverture (2) est fourni, lequel présente extérieurement des parties cylindriques de bague (20) et col (21), disposées de manière coaxiale, respectivement, avec un compartiment intérieur (22) qui s'étend entre les parties bague et col conformément à un critère de symétrie axiale par rapport à un axe (X), ledit compartiment intérieur comprenant:

    a) une section inférieure cylindrique filetée (220) avec un premier rayon (R1) et un premier pas de filetage (P1), qui peuvent être vissés de manière coaxiale au moins sur l'une des extrémités filetées du goujon à monter;

    b) une section intermédiaire (221) comprenant une première partie effilée (2210), qui s'étend de la partie supérieure de la première section, et une deuxième partie cylindrique (2211) avec un deuxième rayon (R2) qui est plus petit que le premier rayon (R1) ;

    c) une section cylindrique supérieure (223) avec une troisième partie cylindrique (2230) comprenant un troisième rayon (R3) qui est plus grand que le deuxième rayon, mais plus petit que le premier rayon (R1), et une quatrième partie cylindrique (2231) avec un quatrième rayon (R4) qui est plus grand que le troisième rayon, mais plus petit que le premier rayon ;

    - un élément de transmission (3) qui transfère la force/le couple de serrage, et qui peut se déplacer axialement au sein de la quatrième partie (2231) de la section cylindrique supérieure (223) est fourni; et ledit élément de transmission comprend une extrémité supérieure (30) où on applique la force/le couple de serrage, et une extrémité inférieure (31) pour transférer ladite force au goujon à monter;

    - une butée de centrage (4) disposée de manière à se déplacer sur une direction axiale (X) a été fournie, comprenant une tête (40) d'un volume adéquat pour s'appuyer étroitement sur la troisième partie (2230) de la section supérieure (223) et une tige d'extrémité (41) qui s'étend de la section intermédiaire (221) à la section inférieure (220), de manière à ce que son extrémité puisse s'appuyer sous le couple sur le goujon (E) à monter; et

    - une série de moyens d'accouplement/désaccouplement (5) ont été fournis, de manière à ce que, en tournant selon une première direction de rotation (G1), cela permette que l'extrémité inférieure (31) de la pièce de transmission (3) s'appuie contre la tête (40) de la butée de centrage (4), en la déplaçant de manière à ce que la tige d'extrémité (41) s'appuie contre le goujon (E) sous le couple, et on transfère la force/le couple de serrage, appliqué sur l'extrémité supérieure (30) de l'élément de transmission, à l'élément d'ouverture (2) où ledit goujon a été vissé;

    et la rotation desdits moyens d'accouplement/désaccouplement (5) suivent une deuxième direction de rotation (G2), qui est opposée à la première direction de rotation, permettant que l'élément de transmission (3) ne s'appuie plus contre la butée de centrage (4), de manière à ce que ladite butée de centrage ne presse plus la tige, et le couple de desserrage appliqué à l'élément de transmission est appliqué à l'élément d'ouverture, et, ainsi, il est desserré du goujon;
    où les moyens d'accouplement/désaccouplement (5) comprennent un assemblage constitué par une fiche disposée orthogonalement (32) qui saillit de la surface latérale de l'élément de transmission (3), et un trou oblong (23) incliné sur la section du col (21) de l'élément d'ouverture (2), où ladite fiche peut glisser; et
    où l'extrémité supérieure (30) de l'élément de transmission (3) est disposée comme un moyeu pour accoupler les outils de serrage.
     
    2. Un outil de type clé conformément à la revendication 1, où la quatrième partie (2231) de la section cylindrique supérieure (223) de l'élément d'ouverture est filetée avec un deuxième pas de filetage (P2) qui est plus petit que le premier pas de filetage (P1), et l'élément de transmission (3) utilisé pour transférer la force/le couple de serrage est fourni avec filetage pour le couplage à ladite quatrième partie (2231) audit filetage avec le deuxième pas de filetage.
     
    3. Un outil de type clé conformément à la revendication 1, où l'élément de transmission (3) et la fiche qui fait saillie (32) sont fournis comme pièces séparées.
     
    4. Un outil de type clé conformément au moins à l'une de revendications 1 à 3, où le bout libre de la tige d'extrémité (41) de la butée de centrage (4) a été disposé de manière à s'ajuster bien serré dans l'extrémité du goujon (E) à monter.
     
    5. Un outil de type clé conformément à la revendication 4, où le bout libre de la tige d'extrémité (41) de la butée de centrage (4) est disposé selon une forme concave, convexe ou plate, ou selon une forme plate avec une pointe centrale ou une pointe conique, qui peut s'ajuster bien serrée au goujon/boulon, respectivement, qui a été fabriqué par pressage à chaud, pressage à froid, découpage à la scie, usinage et cisaillement.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description