EP0224622A2 - Appareil pour mettre sous tension un boulon fileté ou similaire - Google Patents

Appareil pour mettre sous tension un boulon fileté ou similaire Download PDF

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Publication number
EP0224622A2
EP0224622A2 EP85308459A EP85308459A EP0224622A2 EP 0224622 A2 EP0224622 A2 EP 0224622A2 EP 85308459 A EP85308459 A EP 85308459A EP 85308459 A EP85308459 A EP 85308459A EP 0224622 A2 EP0224622 A2 EP 0224622A2
Authority
EP
European Patent Office
Prior art keywords
jaws
sleeve
stud
engagement
housing
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Withdrawn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
EP85308459A
Other languages
German (de)
English (en)
Other versions
EP0224622A3 (fr
Inventor
William H.J. Vossbrinck
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.)
Haskel International LLC
Original Assignee
Haskel Inc
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 Haskel Inc filed Critical Haskel Inc
Priority to EP85308459A priority Critical patent/EP0224622A3/fr
Publication of EP0224622A2 publication Critical patent/EP0224622A2/fr
Publication of EP0224622A3 publication Critical patent/EP0224622A3/fr
Withdrawn legal-status Critical Current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
    • B25B29/00—Accessories
    • B25B29/02—Bolt tensioners

Definitions

  • This invention relates to apparatus for tensioning a threaded stud or like member such as may be used in making up a flanged joint in pressure lines and pressure vessels, or other environments in which control of stress in threaded fasteners is desired.
  • Flanged joints in various pressure lines and pressure vessels are widely used in industry.
  • two parts typically of cylindrical shape, are manufactured with annular flanges at their ends.
  • the flanges are formed with congruent hole patterns so that the two members may be joined to one another in a pressure tight manner by first introducing a gasket between the two flanges and then by joining the flanges with threaded stud-­like members, e.g., studs, bolts or stud-bolts, which extend through the holes and have nuts engaged therewith.
  • stud is sometimes used herein for convenience to refer to the broader class of stud-like members to which the invention applies. It is important, particularly in large diameter members, that the tension in the studs be sufficient to withstand imposed forces and be uniform so as to avoid deformation of the flanges and the members to which they are fixed.
  • One known device for tensioning studs in the above described environment includes a hollow tubular housing that fits over the stud and the nut and rests on the surface of the flange.
  • a puller bar which has at one end an interior threaded collar adapted for engagement with the portion of the stud that protrudes beyond the nut.
  • the puller bar collar is engaged with the stud threads by rotating the puller bar, and there is a hydraulically powered mechanism to which the remote end of the puller bar is fastened.
  • tension is applied to the stud so that the nut can be tightened, the amount of the tension being controlled by controlling the hydraulic pressure applied to the hydraulic actuator.
  • US-A-3,995,828 discloses a bolt tensioning apparatus having a seg­mented nut and a mechanism for moving the segments between a radially inward position, at which they engage the stud, and a radially outward position at which they are free of the stud.
  • the apparatus disclosed in that patent eliminates the need to rotate the puller bar through numerous revolutions each time the apparatus is engaged with or disengaged from the stud. This reduces the time necessary for engagement and disengagement with a stud.
  • the apparatus requires an unduly long stud because a longitudinally or axially moving sleeve is employed in moving the segments radially. Longitudinal movement of the sleeve requires substantial space between the segments and the longitudinal housing that contains the segments. Consequently, the device is useful only on unduly long studs which are undesirable as are the special studs provided with concentric grooves that are specifically disclosed in US-A-3,995,828.
  • the present invention provides an apparatus for ten­sioning a threaded stud or like member, which apparatus comprises a plurality of jaws to be arrayed about said member, each of said jaws having an inner surface adapted to engage the threads of said member, and pull means for applying a force to said jaws so as to apply axial tension to said member, said apparatus being characterized by a rotatable actuator sleeve defining an axial opening within which said jaws are disposed, said sleeve defining interior cam surfaces so contoured as to force said jaws to move radially inwardly into engagement with said member when said sleeve is moved to a first rotational position and to permit said jaws to move radially outwardly out of engagement with said member when said sleeve occupies a second rotational position.
  • the apparatus is provided within a housing having an internal bore sufficiently large to pass over the stud-like member and the nut and to rest on a flange or other surface from which the member projects.
  • Supported within the housing bore are the jaws, for example four in number, and circumscribing the jaws is the actuator sleeve which is supported within the housing bore for rotation with respect to the central longitudinal axis thereof.
  • the actuator sleeve has cam surfaces which cooperate with the jaws so that in one rotative position of the actuator sleeve the jaws are in their outward or disengaged position, and at another rotative position of the actuator sleeve the jaws are moved inward into engagement with the stud threads. That the sleeve is actuated by rotation, rather than axial movement permits the jaws to be positioned so that engagement with the stud-like member is accomplished without re­quiring an extradordinarily long stud.
  • Tensioning apparatus formed in accordance with one important aspect of the present invention accommodate this deformation or misalignment by providing an engaging surface between the jaws and the puller bar that is concave. Accordingly, even though misalignment occurs, apparatus of the invention can tension the stud without deforming either the stud or the apparatus.
  • the jaws are supported within the housing so that each can ex­perience a moderate degree of independent axial movement. This fa­cilitates engagement with the stud threads without requiring attention to the rotational position of the tensioning device when it is first installed on a stud and assures complete engagement between the jaws and the stud threads.
  • the housing 12 is typically formed of steel or a like strength material, has a generally cylindrical shape and defines interiorly thereof a bore 14 which has an inside dimension great enough so that the housing can be installed over a nut N engaged with a stud S which extends substantially perpendicularly from the surface of a flange F.
  • the flange F is rigid with a pipe P which is typically of hollow cylindircal shape. Between two flanges as joined together by the stud S, a gasket G is usually installed.
  • the housing 12 at its lower end, defines an annular abutment surface 16 which is normal to the longitudinal dimension of the housing and of the bore 14 and is adapted to bear on the flange surface F.
  • the housing has an exterior chordally excised surface portion 17 which permits the apparatus to be used in environments in which there is limited space between the stud and the cylindrical pipe of which the flange is a part.
  • the bore 14 defines a downward facing shoulder surface 18 against which a nut engaging socket 20 bears.
  • the socket 20 is maintained within the bore 14 by means of a retaining ring 22, the surface of the bore being provided with a groove 24 for receiving the ring 22 and maintaining the socket in place.
  • the socket 20 defines a hexagonal central opening 26 which is dimensioned to engage nut N so that rotation of the socket imparts corresponding rotation to the nut.
  • the external surface of the socket 20 is formed with a plurality of radially extending holes 28.
  • the holes 28 are, preferably circular in cross-section to receive a similarly shaped Tommy bar 30 which can be introduced into one of the holes, a circumferentially extending slot 32 being provided in the housing and through which the Tommy bar can be introduced.
  • the circumferential spacing between adjacent holes 28 is established such that at least one of the holes is always accessible through the slot 32.
  • an actuating sleeve indicated generally at 36.
  • the sleeve 36 has an external cylindrical surface having a diameter less than that of the bore 14 so that the actuating sleeve can rotate within the bore and can skew with respect to the axis of the bore.
  • An elastic O-­ring 38 is provided for centring the sleeve 36 within the bore while per­mitting skewing movement of the sleeve, the bore 14 being provided with a groove 39 for retaining the O-ring in place.
  • an operating handle 40 Secured to the external surface of the actuating sleeve 36 and extending substantially radially thereof is an operating handle 40. Housing 12 has a circumferentially extending slot 42 through which operating handle 40 extends so that actuator sleeve 36 can be rotated from the exterior of the apparatus.
  • the actuator sleeve 36 defines a central axial opening, indicated generally at 44, and disposed within the opening is a plurality of stud engaging jaws, there being four such jaws, indicated respectively at 46, 48, 50 and 52 in the embodiment shown in the drawings.
  • the jaws are virtually identical and, thus, a description of one will suffice as a de­scription of all.
  • Each jaw is generally sector shaped in cross section (see Figures 4 to 6) and has an arcuate outer surface 54. At the lower end of the inner surface each jaw has a threaded portion 56.
  • the thread segments on each threaded portion 56 have the same pitch as the threads on the stud S and are sufficient in number that, when the jaws are moved inward into engagement with the threads on stud S, sufficient force can be transmitted to the stud to achieve the requisite tension thereon.
  • the jaws are supported within the housing 12 such that the lower axial extremity of the jaws is substantially coextensive with the upper surface of socket 20 in order that a substantial portion of the threads of the stud S can be engaged.
  • a pin 58 protrudes from the upper extremity of the exterior surface of each of the jaws, the wall of housing 12 being slotted as at 60 to admit the pin therethrough.
  • the slot 60 is axially elongated so as to afford axial movement of the jaws and circumferentially limited to prevent rotation of the jaws when the actuator sleeve 36 is rotated.
  • the central region of the inner surface of each of the jaws is excised at 62 thereby to define a cavity that is bounded by all four jaws.
  • the upper extremity of excision 62 is defined by an inwardly extending abutment surface 64.
  • the abutment surface 64 is of convex spherical shape.
  • the jaws 46 to 52 have, on their side surfaces, upper and lower tangentially extending holes 66 and 68.
  • the holes in adjacent jaw surfaces form confronting hole pairs.
  • Fitted into opposing hole pairs are tangentially extending guide pins 70, the fit between the pins and the holes being sufficiently loose that relative movement between adjacent jaws can occur.
  • Circumscribing each pin 70 is a compression spring 72 which biasses the jaws away from one another and outwards of engagement with the stud S.
  • the central opening 44 in actuator sleeve 36 is configured so that rotation of the actuator sleeve to one extremity of its travel urges the jaws into engagement with stud S and rotation of the actuator sleeve to its opposite extremity permits springs 72 to urge the jaws radially outwards and away from engagement with the stud.
  • the central opening 44 in the actuator sleeve has a number of camming surface portions equal to the number of jaws, again four in the embodiment shown in the drawings. Camming portions are disposed around the surface of the opening 44 and are positioned to correspond to the spacing of the jaws.
  • Each camming surface portion includes a first inwardly extending surface portion 74 which is dimensioned with respect to the jaws to that when the inward extending portion contacts the jaw, the jaw is moved into engagement with the threads on stud S.
  • each camming surface portion has a second surface 76 that is disposed radially outwardly of the inwardly extending surface portion 74. The portion 76 is so dimensioned that when the outer surface of a jaw rests against it, the jaw is disengaged from the stud.
  • transition portion 78 Intermediate the inwardly extending portion 74 and outwardly disposed portion 76 is a transition portion 78, which effects a smooth transition between the two extreme portions of the camming surface and facilitates movement of the actuator sleeve 36 between its two rotational extremes.
  • the head 80 of a puller bar 82 is disposed within the cavity defined by the excisions 62 in the jaws 46 to 52.
  • the puller bar 82 includes an axially extending shaft 84 rigid with head 80. At the upper end of the shaft 84 is a threaded portion 86.
  • the outside diameter of the head 80 is less than the inside diameter of the cavity formed within the jaws, when the jaws are in their inward position.
  • the outside diameter of shaft 84 is less than the innermost position of jaw abutment surface 64. Accordingly, a degree of skewing between the jaws and puller bar 82 can be tolerated as shown in Figure 7.
  • the upper surface 88 of the head is concave, having a radius of curvature equal to the radius of curvature of the convex abutment surfaces 64 on the jaws.
  • a hexagonal opening 90 which can be engaged with an Allen wrench to impart rotational force to the puller bar during assembly or disassembly of the apparatus, is defined in the lower end surface of the puller bar 82.
  • a screwdriver slot may be formed in the lower surface of the piston 92, the upper threaded portion 86 of the puller bar being received into a complementary threaded opening in the drive piston 92.
  • the drive piston 92 is supported in a piston chamber 94 in the housing 12, axially aligned with the bore 14. At its upper end the piston 92 is formed with an enlarged portion 96, the upper surface of the enlarged portion having spanner holes 97 for applying torque to the piston during assembly and disassembly of the apparatus.
  • the side wall of the enlarged portion 96 has a slot 98 in which a sealing ring 100 is disposed. The sealing ring 100 cooperates with the wall of the piston chamber 94 to afford movement of the piston within the chamber and to form a seal against leakage of hydraulic fluid therepast.
  • the enlarged portion 96 has a lower annular surface 102 against which hydraulic pressure is appllied to move the piston upwards and to effect engagement between the concave upper surface 88 of the head 80 of the puller bar 82 and the convex spherical surfaces 64 on the jaw abutments.
  • a port 103 formed in the wall of the housing 12.
  • inlet fitting 104 For communicating hydraulic fluid to the port, there are inlet fitting 104 and a hydraulic fluid line 106.
  • the hydraulic fluid line is connected to a conventional source of pressurized hydraulic fluid (not shown).
  • the housing 12 For preventing leakage of the hydraulic fluid downwards of the cylinder, the housing 12 is provided with an inwardly extending projection 108 in the wall of which an annular cutout 110 is formed.
  • a hydraulic seal 112 is disposed within the cutout 110, the seal having an inner surface portion contacting piston 92 to permit the piston to move and to prevent leakage of hydraulic fluid therepast. Seal 112 is retained in place by a washer 114 and a snap ring 116 which is engaged in a groove provided in the side wall of projection 108 above the seal.
  • the upper end of the piston chamber 94 is closed by an impervious end closure disk 118.
  • the disk 118 is fastened to the housing 12 via a threaded connection 120.
  • Spanner holes 121 are provided in the upper surface of the disk 118 to facilitate its installation and removal.
  • the disk 118 is preferably formed of aluminum or a like material that is softer than the material of which housing 12 is formed.
  • the flanged joint is first made up by installing a gasket G, aligning the flange holes with one another, and introducing studs S through aligned pairs of flange holes. Nuts N are threaded onto the studs until the nut surfaces are moved into contact with the flange surface. Next one or more stud tensioners are placed onto the protruding nut(s) and stud(s) as depicted in Figure 2. It will be noted that the actuator sleeve 36 is in a position so that thread portions 56 of the jaws are retracted from the threads of stud S. Additionally, the nut N resides in the central hexagonal opening of socket 20. As shown in Figure 1, it is typical practice to employ plural stud tensioners at a given time, typically spaced uniformly around a flange.
  • the actuator sleeve 36 is rotated by applying circumferntial force on the operating handle 40, as indicated in Figure 4.
  • Such movement of the operating handle 40 causes the camming transition portion 78 to traverse the outer surfaces of the jaws and eventually moves the inner camming surface 74 into contact with the outer surfaces of the jaws.
  • the jaws are axially slidable within both the actuator sleeve 36 and the housing 12, the jaws can quickly and completely move into threaded engagement with the stud S.
  • the gap between the outer surface of the actuator sleeve 36 and the inner surface of passage 14 permits the sleeve, as well as the jaws 46 to 52 within the sleeve, to move to a position askew of the central axis of passage 14 and into secure, intimate engagement with the threads on stud S.
  • the upper surface 88 of the puller bar 82 is concave and because the abutment surfaces 64 on the jaws are congruently convex secure engagement between the puller bar, which remains axially aligned with the axis of passage 14, and the jaws, which skew with respect to the axis of passage 14, is achieved.
  • the O-ring 38 serves to retain the actuator sleeve and the jaws centrally of passage 14, but because of the elasticity in the O-ring, the jaws can move to a skewed position.
  • FIG 8. A modification of a stud tensioning apparatus according to the invention is shown in Figure 8.
  • a modified jaw 52' having an excision 62' which has a vertical dimension substantially less than that of excisions 62 to which reference has been previously made, is provided.
  • the verticial dimension of the excision 62' is sufficiently greater than that of puller bar head 80 that skewing as described previously in connection with Figure 7 can occur.
  • the wave washer 130 is formed of spring steel or a like resilient material and has upwardly extending undulations that bear against the lower surface of the puller bar and downward extending undulations that bear on the upwardly facing surfaces of the excisions 62'.
  • the invention is not limited to stud tensioning apparatus in which the socket 20 is rotated by a Tommy bar 30.
  • a socket 20' has fixed to its upper extremity a bevel gear 136.
  • Supported within the housing 12 is a bearing 138 which supports a drive shaft 140 for rotation about an axis that extends radially of the central axis of the housing 12.
  • Fastened to the inner end of drive shaft 140 is a bevel gear 142 which meshes with the bevel gear 136 so that upon rotation of the drive shaft 140 by a suitable handle (not shown) rotation is imparted to the socket 20' and a nut N engaged thereby.
  • FIG. 10 Still another mechanism for imparting rotation to the nut N is shown in Figure 10, in which a socket 20" which has on its periphery gear teeth 144. Mounted on the exterior surfaceof the housing 12 and extending radially outwardly therefrom is a gear housing 146 which has a cover plate 148, that is illustrated broken away in Figure 10 to reveal internal details thereof. An idler pinion 150 is provided with teeth to mesh with the teeth 144 on socket 120". The pinion 150 is supported for free rotation on a shaft 152.
  • a drive gear 154 Radially outwards of the idler pinion 150 within gear housing 146 is a drive gear 154 which is supported for rotation on a vertically extending shaft 156.
  • the drive gear 154 has teeth that mesh with the idler gear 150 so that rotation of the drive gear effects rotation of the socket 20".
  • the shaft 156 extends above the cover plate 148 and has a radial portion 158 which enables a user to apply torque to the shaft 166 and to the drive gear 154. Thus a nut N can be tightened by the consequent torque applied to the socket 20".
  • the invention provides a stud tensioning apparatus which affords numerous salutary advantages.
  • the invention can be embodied in a device that consists of a small number of rugged parts.
  • the configuration of the actuator sleeve 36 and its actuation in a rotational direction together with limited independent axial movability of the jaws permits construction of a quick acting device that can be conveniently engaged with a stud.
  • the gap between the outer surface of the actuator sleeve 36 and the surface of the passage 14, the presence of O-­ring 38, and the spherical surfaces on puller bar head 80 and jaw abutments 64 coact to assure expeditious and accurate tensioning of studs even in the presence of deformation of the flanges.
  • the presence of an air chamber above piston 92 assures quick release of the device from a stud, and formation of end closure disk 118 from relatively soft material protects the device and its users in the rare event that a stud fractures during tensioning thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
EP85308459A 1985-11-20 1985-11-20 Appareil pour mettre sous tension un boulon fileté ou similaire Withdrawn EP0224622A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP85308459A EP0224622A3 (fr) 1985-11-20 1985-11-20 Appareil pour mettre sous tension un boulon fileté ou similaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85308459A EP0224622A3 (fr) 1985-11-20 1985-11-20 Appareil pour mettre sous tension un boulon fileté ou similaire

Publications (2)

Publication Number Publication Date
EP0224622A2 true EP0224622A2 (fr) 1987-06-10
EP0224622A3 EP0224622A3 (fr) 1987-11-11

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EP85308459A Withdrawn EP0224622A3 (fr) 1985-11-20 1985-11-20 Appareil pour mettre sous tension un boulon fileté ou similaire

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015773A1 (fr) * 1995-10-25 1997-05-01 Allseas Group S.A. Procede et dispositif de montage et de demontage d'une installation reposant sur le fond marin
DE4341707C3 (de) * 1993-11-12 1999-02-11 Frank Hohmann Hydraulische Gewindebolzenspannvorrichtung
FR2841304A1 (fr) * 2002-06-20 2003-12-26 Skf Ab Dispositif de tension pour mise en precontrainte d'une tige et procede de tension associe
DE102007015975A1 (de) * 2007-03-31 2008-10-23 As Tech Industrie- Und Spannhydraulik Gmbh Hydraulische Spannvorrichtung zum Spannen von Schrauben
US20130008015A1 (en) * 2010-02-08 2013-01-10 Junkers John K Apparatus and methods for tightening threaded fasteners
DE102013113982A1 (de) * 2013-12-13 2015-06-18 Frank Hohmann Spannvorrichtung zum Dehnen eines Gewindebolzens
EP3567354A4 (fr) * 2018-02-28 2020-12-30 Tohnichi MFG. Co., Ltd. Dispositif de traction
US20210252677A1 (en) * 2018-06-20 2021-08-19 Patentec Quickdrive As Tool for tightening nut on a bolt to form a fixed connection

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE288152C (fr) *
DE938420C (de) * 1943-11-11 1956-01-26 Daimler Benz Ag Werkzeug zum Entfernen von Stehbolzen, Zapfen, Rohrstutzen od. dgl.
GB884923A (en) * 1959-03-20 1961-12-20 Babcock & Wilcox Co Improvements in fluid-pressure-operated devices for tensioning studs or like tensionmembers
GB948555A (en) * 1961-05-08 1964-02-05 Diamond Power Speciality Stud tensioner having self-aligning connector
DE2411204A1 (de) * 1973-03-12 1974-09-19 Transfer Systems Automatischer bolzenspanner
US3995828A (en) * 1975-09-16 1976-12-07 Biach Industries, Inc. Bolt tensioning apparatus
DE2625407B1 (de) * 1976-05-13 1977-11-10 Sulzer Ag Anziehvorrichtung zum anspannen eines schraubenbolzens
US4315446A (en) * 1979-04-30 1982-02-16 Orban Joseph N Stud tensioning device
EP0057346A2 (fr) * 1981-01-29 1982-08-11 Westinghouse Electric Corporation Dispositif de serrage de boulons de cuve de réacteur
GB2143608A (en) * 1983-07-19 1985-02-13 Gripper Inc Stud tensioning
EP0220472A1 (fr) * 1985-09-20 1987-05-06 Haskel, Inc. Appareil pour visser des goujons

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE288152C (fr) *
DE938420C (de) * 1943-11-11 1956-01-26 Daimler Benz Ag Werkzeug zum Entfernen von Stehbolzen, Zapfen, Rohrstutzen od. dgl.
GB884923A (en) * 1959-03-20 1961-12-20 Babcock & Wilcox Co Improvements in fluid-pressure-operated devices for tensioning studs or like tensionmembers
GB948555A (en) * 1961-05-08 1964-02-05 Diamond Power Speciality Stud tensioner having self-aligning connector
DE2411204A1 (de) * 1973-03-12 1974-09-19 Transfer Systems Automatischer bolzenspanner
US3995828A (en) * 1975-09-16 1976-12-07 Biach Industries, Inc. Bolt tensioning apparatus
DE2625407B1 (de) * 1976-05-13 1977-11-10 Sulzer Ag Anziehvorrichtung zum anspannen eines schraubenbolzens
US4315446A (en) * 1979-04-30 1982-02-16 Orban Joseph N Stud tensioning device
EP0057346A2 (fr) * 1981-01-29 1982-08-11 Westinghouse Electric Corporation Dispositif de serrage de boulons de cuve de réacteur
GB2143608A (en) * 1983-07-19 1985-02-13 Gripper Inc Stud tensioning
EP0220472A1 (fr) * 1985-09-20 1987-05-06 Haskel, Inc. Appareil pour visser des goujons

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341707C3 (de) * 1993-11-12 1999-02-11 Frank Hohmann Hydraulische Gewindebolzenspannvorrichtung
WO1997015773A1 (fr) * 1995-10-25 1997-05-01 Allseas Group S.A. Procede et dispositif de montage et de demontage d'une installation reposant sur le fond marin
NL1001497C2 (nl) * 1995-10-25 1997-05-02 Allseas Group Sa Werkwijze en inrichting voor het monteren of demonteren van een op een zeebodem aanwezige installatie.
AU702599B2 (en) * 1995-10-25 1999-02-25 Allseas Group S.A. Method and apparatus for assembling or disassembling an installation present on a seabed
EP1375073A1 (fr) * 2002-06-20 2004-01-02 Aktiebolaget SKF Dispositif de tension pour mise en précontrainte d'une tige et procédé de tension associé
WO2004000504A1 (fr) * 2002-06-20 2003-12-31 Aktiebolaget Skf Dispositif de tension pour mise en precontrainte d'une tige et procede de tension associe
FR2841304A1 (fr) * 2002-06-20 2003-12-26 Skf Ab Dispositif de tension pour mise en precontrainte d'une tige et procede de tension associe
KR100862406B1 (ko) * 2002-06-20 2008-10-08 아크티에볼라게트 에스케이후 나사 로드를 예압하기 위한 인장장치, 나사 로드를 예압하기 위한 인장 조립체 및 인장방법
DE102007015975A1 (de) * 2007-03-31 2008-10-23 As Tech Industrie- Und Spannhydraulik Gmbh Hydraulische Spannvorrichtung zum Spannen von Schrauben
DE102007015975B4 (de) * 2007-03-31 2008-12-18 As Tech Industrie- Und Spannhydraulik Gmbh Hydraulische Spannvorrichtung zum Spannen von Schrauben
US20130008015A1 (en) * 2010-02-08 2013-01-10 Junkers John K Apparatus and methods for tightening threaded fasteners
DE102013113982A1 (de) * 2013-12-13 2015-06-18 Frank Hohmann Spannvorrichtung zum Dehnen eines Gewindebolzens
US9744656B2 (en) 2013-12-13 2017-08-29 Frank Hohmann Clamping device for expanding a threaded bolt
EP3567354A4 (fr) * 2018-02-28 2020-12-30 Tohnichi MFG. Co., Ltd. Dispositif de traction
US20210252677A1 (en) * 2018-06-20 2021-08-19 Patentec Quickdrive As Tool for tightening nut on a bolt to form a fixed connection

Also Published As

Publication number Publication date
EP0224622A3 (fr) 1987-11-11

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