FR2975322A1 - Device for extraction of ring placed in boring formed in support part, has control unit controlling deformation of cylindrical unit, and pulling unit pulling cylindrical unit along its axis to allow displacement of cylindrical unit - Google Patents

Device for extraction of ring placed in boring formed in support part, has control unit controlling deformation of cylindrical unit, and pulling unit pulling cylindrical unit along its axis to allow displacement of cylindrical unit Download PDF

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Publication number
FR2975322A1
FR2975322A1 FR1154401A FR1154401A FR2975322A1 FR 2975322 A1 FR2975322 A1 FR 2975322A1 FR 1154401 A FR1154401 A FR 1154401A FR 1154401 A FR1154401 A FR 1154401A FR 2975322 A1 FR2975322 A1 FR 2975322A1
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France
Prior art keywords
ring
cylindrical member
unit
cylindrical
according
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Granted
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FR1154401A
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French (fr)
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FR2975322B1 (en
Inventor
Pascal Martinez
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Airbus Operations SAS
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Airbus Operations SAS
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Priority to FR1154401A priority Critical patent/FR2975322B1/en
Publication of FR2975322A1 publication Critical patent/FR2975322A1/en
Application granted granted Critical
Publication of FR2975322B1 publication Critical patent/FR2975322B1/en
Application status is Active legal-status Critical
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/06Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races

Abstract

The device (5) has a cylindrical unit (52) with a longitudinal axis (XX'). The cylindrical unit is elastically deformable transverse to an axis between a rest position and a deformed position. The cylindrical unit has transverse dimension greater than outer transverse dimension of an internal ring. A control unit (56) controls deformation of the cylindrical unit between the two positions. A pulling unit pulls the cylindrical unit along its longitudinal axis to allow displacement of the cylindrical unit along its axis. The pulling unit is in a form of reversed U-shape. An independent claim is also included for a method for extraction of a ring placed in an opening formed in a support part.

Description

The present invention is in the field of disassembly of a ring disposed in an orifice formed in a support piece. It relates to a device for extracting the ring and a method of using the device. The invention is more particularly applicable to the disassembly of the rings which have been mounted in a bore formed in a support piece and having a reduced or difficult accessibility. In a conventional manner, a ring has a main body, of substantially cylindrical shape, which fits into the bore and an outer annular flange which bears against the support piece when the ring is in position in the bore. The rings are generally wear parts. As such, they must be regularly replaced. Even when the rings are mounted slightly tight, they are relatively difficult to remove because there is no grip on them 15 to allow their extraction. According to the methods proposed by the prior art, the rings to be replaced are removed from the bores, in which they are mounted, by weakening of the ring by blows against them, on the main body, at a side opposite to one side insertion of the ring, for example by means of a jet and a hammer. In this case, both the bore and the ring are degraded during this operation. The deteriorations observed are generally scratches in the bore and deformations by matting on the rings. The rings are no longer usable. The solution recommended accordingly is then to perform a washing or machining of the bore, along a repair coast, before using for replacement of the used ring a new ring. In addition, the methods proposed by the prior art require the use of two operators, one of which is necessarily placed on the opposite side to the insertion side of the ring to hammer. Generally, this opposite side 30 is located in an inaccessible environment, for example an interior of a drift, the withdrawal operation can not always be easily achieved, see can not be achieved at all.

The present invention aims to overcome the drawbacks of disassembly solutions of existing rings mounted in an orifice, preferably a bore, in particular to those exposed above, by providing a device which ensures the extraction of the ring without causing deterioration of the ring, the support piece and in particular the surface of the orifice. For this purpose, according to a first aspect of the invention, a device for extracting a ring disposed in an orifice formed in a support piece is characterized by: a cylindrical member of longitudinal axis (XX '), elastically deformable transversely to the longitudinal axis (XX ') between two positions: a rest position, in which the cylindrical member has an external transverse dimension di smaller than a given internal transverse dimension dt of the ring, and o a so-called deformed position in which the cylindrical member has an external transverse dimension d2 greater than the internal transverse dimension d nt of the ring; means for controlling the deformation of the cylindrical member capable of causing the passage of the cylindrical member between the two positions, - traction means of the cylindrical member along its longitudinal axis adapted to allow a displacement of the cylindrical member in transla along the longitudinal axis. The term "rest position" is understood here to mean that the annular member is in an undeformed position, that is to say without any pressure exerted on it, and that it has a shape and dimensions such that it is adapted to be inserted inside the ring and that in this position, preferably, it is closer, by its external transverse dimension, an inner peripheral wall of the ring. By deformed position, it is meant that the annular member is in a deformed position, that is to say that it undergoes a pressure such that it deforms, and that it has a shape and dimensions such that it is not fit to be inserted inside the ring. In most common embodiments in which the ring has a substantially cylindrical inner peripheral wall of diameter d, the cylindrical member also has an outer wall of substantially cylindrical shape, and an outer diameter di smaller than the diameter of the wall. internal ring device, when in the rest position or an external diameter d2 greater than the diameter of the inner peripheral wall of the ring, when in the deformed position.

The device according to the invention is advantageously based on the ability of the cylindrical member to deform, in this case here transversely, while exerting a pressure transverse to the longitudinal axis, sufficient for, when traction is exerted on the extraction device, remove it from the orifice in which it is inserted. The cylindrical member is extracted from it by simultaneously driving the ring. The ring can thus be extracted easily out of the orifice, without causing deterioration of the latter. To extract a ring from its orifice, one would rather tend to try to shrink the diameter of the ring, rather than exert a lateral pressure against its inner peripheral wall.

The extraction operation is advantageously easy and quick to perform. Since the orifice has not been impacted and does not bear any marks following disassembly, it is no longer necessary to re-machine it, and a replacement ring of the same size as the used ring that has been removed can be re-machined. to be used. The overall cost involved in replacing the ring is therefore advantageously reduced. The service life of the support part is increased. The invention may furthermore be implemented according to the advantageous embodiments set out below, which may be considered individually or in any technically operative combination.

In preferred embodiments of the invention, the member is made of a material having a hardness such that, when the cylindrical member is introduced into an internal opening of the ring and placed in a deformed position, said cylindrical member exerts against an inner peripheral wall of the ring a pressure such that said cylindrical member becomes integral with the inner peripheral wall of the ring in all its movements, in particular in translation along the longitudinal axis. Thus the fact that the annular member exerts pressure against the peripheral wall of the ring reduces the risk of damage to the orifice during the extraction operation of the ring. According to an advantageous characteristic, the cylindrical member has a Shore A hardness of between 50 and 65, preferably substantially equal to 60. According to an advantageous characteristic, the material of the cylindrical member is furthermore chosen so as to present a sufficient abrasion resistance to prevent tearing of material particles during efforts caused by adhesion of the cylindrical member to the inner peripheral wall of the ring during extraction. In preferred embodiments of the invention, the cylindrical member is formed of an elastomeric type material, such as for example rubber. In one embodiment, the cylindrical member has a length greater than a length of the ring. Thus, the portion of the cylindrical member that projects into the orifice rests on a longitudinal edge of the ring located in the orifice, and can contribute to facilitating the extraction of the ring during the pulling of the device. extraction out of the orifice. Preferably, so that the cylindrical member is not immobilized against a peripheral wall of the orifice when it is placed in the deformed position, the cylindrical member is chosen such that: in the rest position, its transverse dimension di is smaller than the transverse dimension dn nt of the inner peripheral wall of the ring, - in the deformed position, its transverse dimension d2 is greater than the transverse dimension d nt nt of said inner peripheral wall of the ring but lower to the transverse dimension of the peripheral wall of the orifice or less than the transverse dimension of said outer peripheral wall. According to an advantageous characteristic of the invention, the means for controlling the deformation of the cylindrical member preferably comprise means for compressing the cylindrical member in a longitudinal direction. In a particular embodiment, the cylindrical member is hollow and the compression means comprise: a rod traversing longitudinally the cylindrical member substantially at its center and fixed at a first end to a stop element and at the from a second end to a cam lever, the rotational movement of the cam lever causing translational movement along the longitudinal axis of the rod and the stop member, - a plate, between the cam lever and the cylindrical member, fixed with respect to the movement of the cam lever and the rod, so that the rotation of the cam lever causes the abutment member to move towards or away from the plate.

The stop element, preferably disk-shaped, has a transverse dimension at most equal to a transverse dimension of said cylindrical member in the rest position, to be able to be inserted into the ring. According to an advantageous characteristic of the invention, the cylindrical member comprises a plurality of beads arranged adjacent to each other along the longitudinal axis. Thus, the transverse deformation of the cylindrical member is more homogeneous over its entire outer wall. According to a second aspect, the invention also relates to a method of extracting the ring disposed in an orifice by means of the previously described device according to at least one of its characteristics. The method is characterized in that the cylindrical member is inserted into the ring, disposed in the orifice of the support piece, in the rest position, and the cylindrical member is deformed in the deformed position and then the the ring is extracted from the orifice. In one embodiment of the invention, the cylindrical member is introduced into the ring to a position in which said cylindrical member is contained in said ring, that is to say so that it does not protrude from the ring in the orifice. Thus, the member, in deformed position, bears only on the inner peripheral wall of the ring. Extraction of the ring by longitudinal traction on the cylindrical member simultaneously drives the ring which is integral therewith.

In another embodiment of the invention, the cylindrical member is introduced into the ring to a position such that said cylindrical member partially projects beyond the ring at an end opposite to an end comprising the means for tractions, that is to say so that it partially exceeds the ring in the orifice. Thus, the member, in the deformed position, on the one hand is supported in part on the inner peripheral wall of the ring and on the other hand is found vis-à-vis the peripheral wall of the orifice. The extraction of the ring by longitudinal traction on the cylindrical member simultaneously drives the ring which is secured to it and by support at the longitudinal edge of said ring.

The invention will now be more specifically described in the context of preferred embodiments, which are in no way limiting, shown in Figures 1 to 7, in which: Figure 1 shows a ring to which the invention applies , mounted in a bore of a support piece, in sectional view along a longitudinal plane, FIG. 2a illustrates an extraction device according to the invention, in a rest position, FIG. 2b illustrates the extraction device according to the invention, in a deformed position, FIG. 3a illustrates the extraction device of FIG. 2a according to the invention, in a rest position, positioned with respect to the ring and to the support piece of FIG. FIG. 3b illustrates the extraction device according to the invention, in a deformed position, positioned with respect to the ring and to the support piece of FIG. 1, with a view to extracting the ring from the bore, the Figure 4 illustrates the disp extraction ositif in the rest position, before its insertion into the ring, FIG. 5 illustrates the extraction device in the deformed position in the ring, the ring being extracted from the bore, FIG. the extraction device in the deformed position in the ring, the ring being extracted completely from the bore, FIG. 7 illustrates the extraction device in the rest position for removing the ring from the device, once this device has been extracted from the bore. A ring 1 to which the present invention applies is shown in FIG. 1 in its slightly mounted position in an orifice, such as a bore 2, formed in a support piece 3. By slightly tightening, it is understood that the ring has dimensions substantially identical to be manually mounted without force in the bore but they can not be removed because it has no grip on it to allow its extraction. The ring 1 comprises, in a conventional manner in itself, a main body 11 for example of substantially cylindrical shape around a longitudinal axis of revolution 12, having an external diameter dext and an internal diameter of nt determined, a peripheral wall external 13 and an inner peripheral wall 14 delimiting an internal opening 15 of the ring. It also comprises an upper annular flange 16 of outer diameter greater than the outer diameter of the body 11. In a conventional manner, the ring is formed of a metallic material. The support part 3 comprises an outer face 31, against which the flange 16 is applied in the mounting position of the ring. The bore 2 has a shape substantially complementary to the external shape of the body 11 of the ring, for example substantially cylindrical, of the same longitudinal axis as the ring 1. Its diameter is substantially equal to the outer diameter of the body 11 of the ring, if although the latter is supported by its outer peripheral wall 13 against the peripheral wall 21 of the bore. In the mounting position in the bore, a lower longitudinal edge 17 of the ring, opposite the flange 16 bearing against the outer face 31 of the support piece 3, is disposed inside the bore 2. When the ring is introduced into the bore, said ring is then found locked inside said bore, supported by its outer peripheral wall 13 against the peripheral wall 21 of the bore. It is difficult to remove because it does not have a plug for its extraction. According to the invention, a device 5 for extracting the ring 1 from the bore 2 is shown in FIGS. 2a and 2b. The extraction device 5 comprises a hollow cylindrical member, said annular member 52, of longitudinal axis XX ', about a rod 51 of longitudinal dimension greater than a length of the annular member 52 and axis axis longitudinal XX '. The annular member 52 is adapted to be introduced into the internal opening 15 of the ring 1. The annular member 52 preferably has an outer contour substantially complementary to the contour of the internal opening 15 of the ring 1, this is in the preferred embodiment, a substantially cylindrical shape of circular cross-section. The annular member 52 is able to be deformed. The annular member 52 is formed of an elastically deformable material, preferably an elastomer. The annular member 52 is adapted to take at least two positions: a first position, called rest position, in which no pressure is exerted on the annular member, as illustrated in FIGS. 2a and 3a, and in which said annular member has a length LI, - a second so-called deformed positron, in which a pressure is exerted on the annular member 52, so that the member deforms radially, as illustrated in FIGS. 2b and 3b, and in which said annular member has a length L2 less than the length LI of said member in the rest position. In the rest position, the annular member has an outer diameter di defined to be smaller than the diameter of the inner peripheral wall d; nt of the ring, preferably substantially equal to a mounting clearance sliding close. In the deformed position, the annular member 52 has an outer diameter d2 defined to be greater than the diameter of the inner peripheral wall d; nt of the ring. In an embodiment illustrated in Figures 2a to 3b, the annular member 52 has a length at most equal to a length of the inner peripheral wall 14 of the ring 1. In another embodiment illustrated in Figures 4 to 7, the annular member 52 has a length greater than the length of the inner peripheral wall 14 of the ring 1. Preferably, in order to allow a radial deformation of the annular member 52 more homogeneous over its entire length, the organ cylindrical 52 is constituted by a plurality of beads 521, of substantially identical dimensions, disposed adjacent to each other along the rod. In the nonlimiting example illustrated in Figures 2a to 3b, the annular member 52 consists of three adjacent beads 521. In the non-limiting example illustrated in FIGS. 4 to 7, the annular member 52 consists of six adjacent beads 521.

The extraction device 5 further comprises means 56 for controlling the deformation of the annular member 52 between the at least two positions. The control means 56 comprise a so-called stop member 53, for example a disc, which is fixedly mounted on the rod 51 at a so-called lower end portion 511 of the latter, and so as to extend in a plane substantially perpendicular to the axis of the rod, substantially symmetrically with respect to this axis. This abutment disk 53 has an outer diameter smaller than the diameter d nt of the inner peripheral wall 14 of the ring 1. At a so-called opposite upper portion 512, the rod 51 is fixed to a double cam lever 54 by a connecting shaft 541 transverse to the rod 51 and passing through the cam lever 54 and the rod 51, so that a rotational movement of the cam lever arm 54 is transformed into a translation movement along the longitudinal axis XX 'of the rod 51 and consequently of the abutment disk 53 which is connected thereto. In an exemplary embodiment (not shown in the figures), the connecting shaft 541 comprises a screw passing through the cam lever 54 and the rod 51 and a clamping nut at a free end of said screw, on both sides. other external faces 542 of the cam lever 54. The control means 56 also comprise means 55 adapted to serve as a sliding surface of the cam lever cam. These means are for example in the form of a plate 55 transverse to the rod 51, substantially parallel to the stop element 53, in which is formed, substantially in its center, a through orifice of diameter as it is adapted to receive the rod 51. The plate 55 is fixed relative to the cam lever 54. In one embodiment and as illustrated in Figures 2a to 3b, the plate 55 has a dimension smaller than the diameter dl of the annular member in the rest position. In a preferred embodiment and as illustrated in FIGS. 4 to 7, so that the plate 55 can also advantageously serve as a support surface for the extraction device 5 on the support part 3, the plate 55 has a greater than the diameter dn nt of the inner peripheral wall 14 of the ring 1, and preferably greater than the outer diameter of the annular collar 16 of the ring 1. The annular member 52 is included between the stop disk 53, which moves longitudinally along the longitudinal axis XX 'depending on the rotation 30 of the cam lever 54, and the plate 55, which remains fixed during the movements of the cam lever 54 and the rod 51. Advantageously, the annular member is pressed against the stop disc 53 and the plate 55. When the cam lever 54 is placed in a first position, the annular member is in a rest position and is not deformed. When the cam lever 54 is placed in a second position, the annular member is in a radially deformed position. The rod 51 is displaced along the longitudinal axis XX ', bringing the stop element 53 closer to the plate 55, as illustrated in FIG. 2b. This approximation causes a longitudinal compression of the annular member 52, causing a radial deformation thereof. In a preferred embodiment, the material of the annular member furthermore has sufficient abrasion resistance to prevent tearing of material particles during the forces caused by the adhesion of the annular member 52 to the wall internal device 14 of the ring 1, during extraction. The material of the annular member 52 is advantageously chosen so that it has a Shore A hardness of between 50 and 65, preferably 60. A Shore A hardness of less than 50 would increase the risk of tearing the material out of wear. A Shore A hardness greater than 65 would make the manual effort of compressing the material by a user too important.

In preferred embodiments of the invention, the annular member is formed of rubber, preferably a rubber having a Shore A hardness of 60, corresponding to a black standard rubber. The extraction device 5 further comprises, as illustrated in FIGS. 4 to 7, pulling means 57 of the annular member 52 along the longitudinal axis XX 'able to assist in the removal of the annular member 52 and allow a displacement of the cylindrical member in translation along the longitudinal axis XX, when the extraction thereof from the bore 2. The traction means 57 are in the form of for example an inverted U, having an upper arm 58 and two substantially parallel legs 59 extending from opposite ends of said arm and fixed to the plate 55. The extraction method of the ring 1 arranged, mounted slightly tightly, in the bore 2 according to the The invention is now described below, with particular reference to FIGS. 4 to 7. As illustrated in FIG. 4, the extraction device 5 is presented in front of the internal opening 15 of the ring 1, with the annular member 52 vis-à-vis said open internal structure. The cam lever 54 is previously placed in a position such that the annular member 52 is in the rest position, that is to say not deformed and minimum diameter di. The annular member 52 is inserted into the opening 15 of the ring, from the outer face 31 of the support piece 3. The annular member 52 is preferably introduced into the ring until the plate 55 bears against the In an embodiment, the annular member 52 is inserted into the internal opening 15 of the ring 1 so as to position it inside the bore without overflowing beyond the body 11. of the ring 1, that is to say that the annular member 52 is positioned entirely opposite the inner peripheral wall 14 of the ring 1. Preferably, for this embodiment, the length of the ring the annular member 52 is substantially equivalent to the length of the inner peripheral wall 14 of the ring 1. In a preferred embodiment, as illustrated in FIGS. 4 to 7, the annular member 52 is inserted into the internal opening 15 of the ring 1 so as to position it the inside of the bore partially beyond the body 11 of the ring 1, that is to say that the annular member 52 is positioned partly opposite the inner peripheral wall 14 of the ring 1 and in part vis-à-vis the peripheral wall 21 of the bore 2. Preferably, for this embodiment, the length of the annular member 52 is greater than the length of the inner peripheral wall 14 of the ring. Whatever the positioning of the annular member 52 with respect to the ring 1 in the bore 2, the rod 51 is arranged so that its longitudinal axis XX 'coincides substantially with the longitudinal axis 12 of the ring 1.

When the annular member 52 is in position in the ring 1, said annular member is placed in the deformed position, that is to say radially deformed and of diameter d2 greater than the diameter d nt of the inner peripheral wall 14.

For this, the cam lever 54 is placed in a position such that the annular member 52 is compressed longitudinally, causing a uniform radial deformation of said annular member until the outer diameter of the annular member 52 is greater than the diameter. The plate 55 remains immovable against the annular flange 16 of the ring 1. The rotation of the cam lever 54 causes a longitudinal displacement of the rod 51 along the longitudinal axis XX '. causing the stop disk 53 to approach the plate 55. The pressure exerted by the annular member 52 on the ring 1 is large enough for the annular member 52 to become integral with the ring 1, both in rotation and in translation along the longitudinal axis XX '. When the annular member 52 is in the deformed position in the ring 1, a traction is exerted with the traction means 57, away from the bore 1, along the longitudinal axis 12 of the ring 1. This traction realizes the extraction of the ring 1, driven by the annular member 52 which is integral therewith, out of the bore 1. This operation is carried out without any deterioration or marking of the bore 2, which remains intact and directly ready to receive a replacement ring of the previous one, of the same dimensions as this one. In the embodiment where the annular member 52 is longer than the length of the inner peripheral wall 14 of the bagel and protrudes from the ring 2 in the bore, during the pulling, the part of the member that protrudes into the bore, is supported on the lower longitudinal edge 17 of the ring and facilitates the extraction of the ring out of the bore. Preferably, in this embodiment, the annular member is chosen so as to have, in its deformed position, an external diameter d2 greater than the diameter of the inner peripheral wall of the ring but smaller than the diameter of the wall. peripheral of the bore which is substantially equal to the dext diameter of the outer peripheral wall of the ring so that the annular member 52 does not exert sufficient pressure on the peripheral wall 21 of the bore 2 to make the annular member secured to the bore, thereby preventing the extraction operation of the ring 1 of the bore 2. When the ring 1 is extracted from the bore 2, as illustrated in FIG. annular 52 is returned to the rest position to extract the ring 1 of said annular member and allow a new use of the extraction device. For this, the cam lever 54 is placed in a position so as to decompress longitudinally the annular member 52 to cause a return of said annular member to a non-deformed state, that is to say until the diameter of the annular member is again smaller than the diameter dn nt of the inner peripheral wall 14 of the ring 1. The rotation of the cam lever 54 causes a longitudinal displacement of the rod 51 along the longitudinal axis XX ', causing a distance of the stop disk 53 of the plate 55, releasing the compression exerted on the annular member 52.

All of these operations are advantageously quick to perform, generally less than one minute. The above description clearly illustrates that by its different characteristics and advantages, the present invention achieves the objectives it has set for itself. In particular, it proposes a device and a method for extracting a ring disposed in a bore, for example mounted slightly tightly, which make it possible to carry out the disassembly easily and quickly, for a reduced cost, while ensuring that the surface the bore and the support piece as a whole are not damaged. The device can be conveniently used anywhere, and in any position and configuration of the support part, without the need to separate the latter from a more global set of parts that contains it. In addition, the removal operation of the ring can be performed by a single operator from the insertion side of the ring, unlike existing methods. The invention is however not limited to the embodiments described by way of example and shown in the figures. In particular, any type of means for controlling the deformation of the annular member between the two positions, at rest and expanded, known to those skilled in the art falls within the scope of the invention, insofar as it ensures no damage is created at the support part during extraction.

Claims (4)

  1. CLAIMS1 - Device for extracting (5) a ring (1) disposed in an orifice (2) formed in a support piece (3), characterized in that it comprises: - a cylindrical member (52) of axis longitudinally (XX ') elastically deformable transversely to said longitudinal axis, between two positions: a) a position, said rest, wherein the cylindrical member (52) has an external transverse dimension di smaller than an internal transverse dimension d; given datum of the ring (1), and b) a so-called deformed position, in which the cylindrical member (52) has an external transverse dimension d2 greater than the internal transverse dimension d nt given of the ring (1), control means (56) for the deformation of the cylindrical member (52) capable of causing the passage of the cylindrical member (52) between the two positions; traction means (57) for the cylindrical member (52) along its longitudinal axis (XX ') adapted to allow e a displacement of said cylindrical member in translation along the longitudinal axis.
  2. 2 - Extraction device (5) according to claim 1 wherein the member is made of a material having a hardness such that when the cylindrical member (52) is introduced into the ring (2) and placed in the deformed position , said cylindrical member exerts against an inner peripheral wall (14) of the ring (1) a pressure such that said cylindrical member becomes integral in the movements in translation along the longitudinal axis (XX ').
  3. 3 - extraction device (5) according to claim 2 wherein the cylindrical member has a Shore A hardness between 50 and 65.
  4. 4 - extraction device (5) according to one of the preceding claims wherein the cylindrical member (52) has a length greater than aelength of the ring (2). - Extraction device (5) according to one of the preceding claims wherein the means for controlling the deformation (56) of the cylindrical member (52) comprises means for compressing the cylindrical member (52) according to a longitudinal direction. 6 - extraction device (5) according to claim 4 wherein the cylindrical member (52) is hollow and wherein the compression means comprise: - a rod (51) longitudinally traversing the cylindrical member (52) substantially in its center and fixed at a first end (511) to a stop member (53) and at a second end (512) to a cam lever (54), the rotational movement of the cam lever (54) causing translation movement along the longitudinal axis (XX ') of the rod (51) and the stop member (53), - a plate (55) between the cam lever (54) and the cylindrical member (52), fixed with respect to the movement of the cam lever and the rod, such that the rotation of the cam lever (54) causes the stop member to move towards or away ( 53) relative to the plate (55). 7 - extraction device (5) according to one of the preceding claims wherein the cylindrical member (52) comprises a plurality of beads (512) disposed adjacent to each other along the longitudinal axis (XX '). 8 - extraction device (5) according to one of the preceding claims wherein the cylindrical member (52) is formed of an elastomeric material. 9 - A method of extracting a ring (1) disposed in an orifice (2) by means of an extraction device (5) according to one of claims 1 to 7 in which is introduced into the ring ( 1) the cylindrical member (52) in the rest position, the cylindrical member (52) is deformed in the deformed position and then the ring (1) is extracted from the orifice (2). 10 - A method of extracting a ring (1) according to claim 9 wherein the cylindrical member (52) is introduced into the ring (1) to a position in which said cylindrical member is contained in said ring. 11 - A method of extracting a ring (1) according to claim 9 wherein is introduced the cylindrical member (52) in the ring (1) to a position such that said cylindrical member partially exceeds the level of an end opposite an end comprising the traction means.
FR1154401A 2011-05-20 2011-05-20 Device for extracting a ring disposed in an orifice Active FR2975322B1 (en)

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Application Number Priority Date Filing Date Title
FR1154401A FR2975322B1 (en) 2011-05-20 2011-05-20 Device for extracting a ring disposed in an orifice

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Application Number Priority Date Filing Date Title
FR1154401A FR2975322B1 (en) 2011-05-20 2011-05-20 Device for extracting a ring disposed in an orifice

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FR2975322A1 true FR2975322A1 (en) 2012-11-23
FR2975322B1 FR2975322B1 (en) 2014-03-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1476983A (en) * 1923-12-11 Apparatus pob cutting pipes
NL1021272C2 (en) * 2002-08-14 2004-02-17 Haanschoten Josef Gijsbert Tool for removing bearing from its seat, comprises clamping sleeve and percussion pin with corresponding cone shaped profiles
US6739219B1 (en) * 2003-02-21 2004-05-25 Michael F. Cuevas Damaged light bulb base extractor
EP1654995A1 (en) * 2004-11-03 2006-05-10 Karl Storz GmbH & Co. KG Medical instrument for handling cannulated objects
DE102009012491A1 (en) * 2008-03-14 2009-09-17 Gimatic S.P.A., Roncadelle Mechanical internal gripping device for hollow and perforated bodies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1476983A (en) * 1923-12-11 Apparatus pob cutting pipes
NL1021272C2 (en) * 2002-08-14 2004-02-17 Haanschoten Josef Gijsbert Tool for removing bearing from its seat, comprises clamping sleeve and percussion pin with corresponding cone shaped profiles
US6739219B1 (en) * 2003-02-21 2004-05-25 Michael F. Cuevas Damaged light bulb base extractor
EP1654995A1 (en) * 2004-11-03 2006-05-10 Karl Storz GmbH & Co. KG Medical instrument for handling cannulated objects
DE102009012491A1 (en) * 2008-03-14 2009-09-17 Gimatic S.P.A., Roncadelle Mechanical internal gripping device for hollow and perforated bodies

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