EP1666208A1 - Werkzeug zum Entfernen eines in einem Gehäuse mittels eines verformbaren, umlaufenden Ringes gehaltenen, rohrförmigen Organs und Verwendung dieses Werkzeugs - Google Patents

Werkzeug zum Entfernen eines in einem Gehäuse mittels eines verformbaren, umlaufenden Ringes gehaltenen, rohrförmigen Organs und Verwendung dieses Werkzeugs Download PDF

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Publication number
EP1666208A1
EP1666208A1 EP05356212A EP05356212A EP1666208A1 EP 1666208 A1 EP1666208 A1 EP 1666208A1 EP 05356212 A EP05356212 A EP 05356212A EP 05356212 A EP05356212 A EP 05356212A EP 1666208 A1 EP1666208 A1 EP 1666208A1
Authority
EP
European Patent Office
Prior art keywords
tool
branches
tubular member
housing
rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05356212A
Other languages
English (en)
French (fr)
Inventor
Félilx Garcia
Henrique Costa
Claude Degrave
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Regie Autonome des Transports Parisiens
Original Assignee
Regie Autonome des Transports Parisiens
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Regie Autonome des Transports Parisiens filed Critical Regie Autonome des Transports Parisiens
Publication of EP1666208A1 publication Critical patent/EP1666208A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/0028—Tools for removing or installing seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/28—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing resilient bushings or the like

Definitions

  • the present invention relates to a tool for extracting a tubular member retained in a complementary housing by a deformable peripheral ring. It also relates to the use of such a tool.
  • the invention is concerned with a tool intended to be used during maintenance operations for extracting a tubular member, such as a piston head or the like, housed in an outer casing or housing that it it is not possible to disassemble in its part delimiting the receiving housing of this organ.
  • This tool is for example used in the maintenance of a fluid pressure regulating apparatus.
  • US-A-5,685,052 proposes an extraction tool of this type, but in a specialized field, namely that of the extraction of graphitic sealing collars.
  • This tool comprises a tubular main body to be inserted inside one or more graphitic collars to extract, then to deform radially outwards so that the outer face of the body is pressed against the inner wall of the collar or collars.
  • the latter is provided, at its end opposite to that intended to be introduced into the necklace (s), of branches able to be slightly separated from each other by a sliding follower: when this follower is slid between the branches towards the body, the separation of the branches which results tends to increase the radial dimension of the body, the latter thus gripping the graphitic collars better from the inside.
  • an air purifier 1 intended to be integrated in a compressed air circuit, equipping for example a bus or, more generally, a vehicle for transporting people or goods.
  • This purifier aims to filter and regulate the air pressure of the circuit.
  • the purifier 1 is equipped, inter alia, a piston 2 of generally stepped cylindrical shape and central axis A-A.
  • the piston head 2A is provided axially sliding in a complementary housing 3A delimited internally by the housing 3, so that the piston 2 can compress the air circulating in the purifier.
  • the head 2A is held axially by a peripheral ring 4 substantially coaxial with the head 2A.
  • the rod 4 is housed both in an annular groove 2B dug in the cylindrical lateral surface 2C of the piston head and in an annular groove 3B hollowed in the cylindrical wall of the housing 3A, at a flange 5
  • the ring 4 is in the form of a split metal ring, allowing the ring to be elastically deformable in a direction radial to the axis AA and directed towards this axis AA when a constraint peripheral exerted on the ring tends to close its slot.
  • the flange 5 is interrupted, along its periphery, in four zones 5A, 5B, 5C and 5D, two by two diametrically opposite. These interruption zones allow to "pinch” the ring 4, that is to say to apply locally to the ring four forces directed radially towards the axis AA.
  • the object of the present invention is to provide a tool for extracting easily and quickly a tubular member, such as the aforementioned piston head 2A, limiting the risk of accidents to the person in charge of the maintenance operation, and than the risk of damage to this organ.
  • the invention relates to a tool for extracting a tubular member, such as a piston head, retained in a complementary housing by a deformable peripheral ring, as defined in claim 1.
  • the tool according to the invention is manipulated so that these branches pinch the rod, it is that is to say, simultaneously constrain radially inwards, so that the tubular member can be extracted from its housing by sliding along the bearing and guiding surfaces carried by the branches of the tool.
  • a single operator is then necessary to perform this operation since for example, with one hand, this single operator pinches the ring by means of the tool according to the invention while, with his other hand, he pulls the piston towards the outside of its housing, for example by levering by means of a screwdriver or the like.
  • the tool according to the invention replaces the four screwdrivers used by the first and second aforementioned operators. Guiding the tubular member out of its housing makes the extraction operation fast and safe, significantly improving the working conditions of the operator and limiting the risk of damaging the extracted organ.
  • the invention also relates to a use of a tool as defined above, according to claim 9.
  • Figures 2 to 4 a tool 10 for facilitating the extraction of the piston 2 of the purifier 1 of Figures 1A and 1B.
  • the tool 10 is described below in connection with the purifier 1, this tool can be used to extract other tubular members that the piston head 2A, retained in a complementary housing by a deformable peripheral ring or the like, such as the ring 4 for the piston head 2A.
  • the tool 10 comprises a hollow metal tubular body 12 of generally cylindrical shape with a circular base and a central axis X-X. At one of its longitudinal ends, this body 12 is provided with four branches 14 regularly distributed along the periphery of the body 12 and which each extend in length in a direction generally parallel to the axis X-X. The branches 14 are thus two to two symmetrical with respect to the axis X-X. These branches are rigidly connected to the body 12, for example being integral with this body.
  • Each branch 14 has, facing its symmetrical branch, an inner surface 16 which extends in the rectilinear extension of the cylindrical inner surface 12A of the tubular body 12.
  • the surfaces 16 of the four branches 14 and belong to the same substantially cylindrical envelope centered on the XX axis.
  • the diameter d 16 of this casing is substantially equal to the outside diameter d 2 of the piston head 2A of the purifier 1.
  • each surface 16 opens onto a chamfered surface 18 provided at the free end of the branch 14.
  • This chamfered surface is flared outwardly away from the axis X-X.
  • the chamfered surfaces 18 of the four branches 14 thus belong to the same substantially frustoconical envelope centered on the X-X axis.
  • the apex angle ⁇ of this envelope is approximately 90 °.
  • the operator seizes, with one hand, the tubular body 12 of the tool 10, aligns the axis XX along the axis AA of the only accessible side of the housing 3A and then positions the branches 14 so that their free end are inserted in the interruption zones 5A, 5B, 5C and 5D of the flange 5 of the housing 3.
  • the free ends of the branches 14 are sized to be received in a substantially complementary manner in these interruption zones, thus indexing angularly the position of the tool 10 relative to the housing 3.
  • the tool 10 is then in its configuration of Figures 5A and 5B.
  • the operator manipulates a screwdriver rod or the like 20 to axially pull the piston head 2A towards the outside of its housing, by levering, by pressing on the housing 3, at the level of the collar projecting 2D accessible between two successive branches 14 along the periphery of the tool, as indicated by the arrow F 3 in Figure 5A.
  • a screwdriver rod or the like 20 to axially pull the piston head 2A towards the outside of its housing, by levering, by pressing on the housing 3, at the level of the collar projecting 2D accessible between two successive branches 14 along the periphery of the tool, as indicated by the arrow F 3 in Figure 5A.
  • This piston head is guided outwardly by bearing along the surfaces 16 of the branches 14, until it occupies the position of FIG. 6 where all of its lateral surface 2C is disposed between the branches 14.
  • the ring 4 By elasticity, the ring 4 tends to axially immobilize the head 2A between the branches, allowing extracting the rest of the piston by manipulating only the tool 10.
  • the piston 2 can be replaced by means of the tool 10, performing the steps opposite to those necessary for its extraction. .
  • the tubular wall of the body 12 is radially perforated so as to define a radial access window 22 inside the body 12.
  • this window can be used to allow the introduction and the biasing of the screwdriver rod 20 to generate the release force F 3 .
  • the presence of this window no longer forces the branches 14 long enough to leave between them a lateral access passage to the 2D collar for the screwdriver rod 20 as in FIG. 5A.
  • the length of the branches 14 of FIG. 7 can then be reduced, which increases their robustness.
  • the window 22 may advantageously be dimensioned so that the lever-like loading of the screwdriver rod 20 with respect to the collar 2D of the piston head 2A involves the support of the screwdriver rod against the slice 22A of the body 12 delimiting the lower part, in Figure 7, of the window, so as to generate a force F 1 'similar to the bearing force F 1 of Figure 5A.
  • the manipulation of the screwdriver rod 20 then causes both the pinch of the rod 4 by the branches 14, by pushing (arrow F 1 ') substantially axially of the tool 10 towards the housing 3, and the traction ( arrow F 3 ) of the piston head 2A towards the outside of its housing 3A.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Actuator (AREA)
  • Manipulator (AREA)
EP05356212A 2004-12-06 2005-12-05 Werkzeug zum Entfernen eines in einem Gehäuse mittels eines verformbaren, umlaufenden Ringes gehaltenen, rohrförmigen Organs und Verwendung dieses Werkzeugs Withdrawn EP1666208A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0412946A FR2878775B1 (fr) 2004-12-06 2004-12-06 Outil d'extraction d'un organe tubulaire retenu dans un logement complementaire par un jonc peripherique deformable et utilisation d'un tel outil

Publications (1)

Publication Number Publication Date
EP1666208A1 true EP1666208A1 (de) 2006-06-07

Family

ID=34954589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05356212A Withdrawn EP1666208A1 (de) 2004-12-06 2005-12-05 Werkzeug zum Entfernen eines in einem Gehäuse mittels eines verformbaren, umlaufenden Ringes gehaltenen, rohrförmigen Organs und Verwendung dieses Werkzeugs

Country Status (2)

Country Link
EP (1) EP1666208A1 (de)
FR (1) FR2878775B1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1366857A (en) * 1918-08-31 1921-01-25 Zetzman Walter Piston-ring remover
US1572801A (en) * 1925-02-05 1926-02-09 Kearney Paul Cecil Piston-ring compressor
US1593220A (en) 1924-08-20 1926-07-20 Henry C Phelps Piston-ring compressor
US2697870A (en) 1950-05-23 1954-12-28 Gottlieb F Zucker Piston inserting tool
US5685052A (en) 1996-04-11 1997-11-11 The United States Of America As Represented By The Department Of Energy Graphitic packing removal tool
DE19649622A1 (de) * 1996-11-29 1998-06-04 Iav Motor Gmbh Vorrichtung zum Einführen von mit Dichtringen bestückten Kolben in eine Zylinderbüchse, vorzugsweise bei Verbrennungsmotoren

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1366857A (en) * 1918-08-31 1921-01-25 Zetzman Walter Piston-ring remover
US1593220A (en) 1924-08-20 1926-07-20 Henry C Phelps Piston-ring compressor
US1572801A (en) * 1925-02-05 1926-02-09 Kearney Paul Cecil Piston-ring compressor
US2697870A (en) 1950-05-23 1954-12-28 Gottlieb F Zucker Piston inserting tool
US5685052A (en) 1996-04-11 1997-11-11 The United States Of America As Represented By The Department Of Energy Graphitic packing removal tool
DE19649622A1 (de) * 1996-11-29 1998-06-04 Iav Motor Gmbh Vorrichtung zum Einführen von mit Dichtringen bestückten Kolben in eine Zylinderbüchse, vorzugsweise bei Verbrennungsmotoren

Also Published As

Publication number Publication date
FR2878775B1 (fr) 2008-05-16
FR2878775A1 (fr) 2006-06-09

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