• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a tensioning device (1, 21) comprising a traction element (6, 23) and a body (5, 22). The pulling element (6, 23) comprises a first lower pull element portion (11, 26) consisting of a tie rod that can be secured to a threaded rod (2), and a second upper pull member portion. (12, 27) consisting of a piston, the first (11, 26) and second portions (12, 27) of the traction element being integral in displacement. The pulling element (6, 23) has axial movement in an opening (10a, 25a) of the body (5, 22) mounted coaxially around said pulling element (6, 23), the body (5, 22) comprising a first lower body portion (7, 24) consisting of a tubular support skirt, and a second upper body portion (10, 25) consisting of a cylinder. An annular chamber (14) is formed between the pulling member (6, 23) and the body (5, 22) and is adapted to receive a fluid under pressure.
    公开号:FR3034821A1
    申请号:FR1553039
    申请日:2015-04-09
    公开日:2016-10-14
    发明作者:Patrice Ribault；Marc Alegre
    申请人:SKF AB；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of devices for tensioning a rod before blocking. In particular, the invention relates to devices for prestressing threaded rods used for fixing mechanical parts together. Application areas can be energy, such as wind and nuclear, and civil engineering. The tensioning devices are able to exert an axial tensile force at one end of a threaded rod by means of a tie rod. The device bears on a surface of a structure to be clamped by means of a tubular support skirt surrounding one end of the threaded rod. The device comprises a cylinder and a piston sliding in the cylinder and forming with the cylinder an annular chamber supplied with pressurized fluid. The rod is tensioned using the piston pressurized so as to be stretched. Then the rod is blocked for example by means of a nut directly on the rod, in which case the device consists of a tensioner, or on the device itself, in which case the device consists of a nut type hydraulic. The released rod tends to recover its length at rest but, being blocked by the nut, exerts a clamping force on the mechanical parts to be clamped. Such a tensioning method is an advantageous alternative to tightening a nut to which a large tightening torque must be applied. However, such known voltage devices are designed to be powered by a fluid at pressures up to 1500 bar. But in some applications with reduced space, the force exerted is not sufficient to keep the mechanical parts together. Furthermore, the elements of the device are assembled axially but have radial overlap portions for both the maintenance and pressure tightness of the fluid. However, in some applications, congestion is greatly reduced and such devices can not be used. It is to these problems that the invention more particularly intends to provide by proposing a device for tensioning a threaded rod that can exert a greater force than known devices or that has a small space requirement, which is easy to assemble and to use. , and economical in its manufacture. For this purpose, the invention relates to a tensioning device comprising a traction element and a body. The pulling member comprises a first lower pull member portion consisting of a tie rod engageable with a threaded rod and a second upper pull member portion consisting of a piston, the first and second portions of the pull member traction element being integral in displacement. The pulling member has axial movement in an opening of the body mounted coaxially about said pulling member, the body comprising a first lower body portion consisting of a tubular support skirt and a second upper body portion comprising in a cylinder. An annular chamber is formed between the traction member and the body and is adapted to receive a fluid under pressure.
    [0002] According to the invention, the annular chamber is axially formed between the second traction member portion and the second body portion, and radially between the second body portion and the first portion of the traction member; and a first sealing means is mounted radially between the second body portion and the first traction member portion, and a second sealing means is radially mounted between the second body portion and the second portion of the housing portion; traction element, so that the two sealing means are positioned axially on either side of the annular chamber so as to ensure tightness. Thanks to the invention, the annular chamber for receiving a pressurized fluid extends radially between the barrel portion of the body and the pulling portion of the pulling member. Thus the radial dimension of the chamber is maximized allowing an optimization of the hydraulic surface where the fluid exerts the pressure. For a given radial dimension of the tensioning device, the force that can be exerted is increased because of the increased hydraulic surface, beyond the usual efforts of the standard devices. Such a device can thus be used in applications requiring large voltages. For a given force of the tension device, the radial size of the device can be reduced. Indeed, the hydraulic surface is increased and requires a smaller area to achieve a given effort. By reducing the radial dimensions of the components of the tensioning device, in particular the cylinder and the piston, said device can exert the given force. Such a device can thus be used in small space applications. According to advantageous but non-obligatory aspects of the invention, such a tensioning device may incorporate one or more of the following characteristics taken in any technically permissible combination: The first part of the traction element consists of a tie rod formed by a axial tubular portion provided with a central bore comprising an internal thread intended to cooperate with an external thread of the threaded rod. The second part of the traction element consists of a piston formed by a cylinder. The pulling element is formed in one piece, the first and second parts of the pulling element being parts of one and the same element. The traction element is formed of two distinct parts, the first part of the traction element consisting of a tie rod is fixed in a displacement manner by means of securing with the second part of the traction element consisting of in a piston. The securing means between the first and second parts of the traction element consist of a bore of the second traction part provided with an internal thread cooperating with an external thread of the first part of the traction element. The first part of the body consists of a bearing skirt formed by a hollow axial tubular portion in which the threaded rod and the first part of the traction element are housed and can move axially. 5 - The second part of the body consists of a cylinder provided with a first bore in which is housed and moves axially the first part of the traction element and a second bore, coaxial with the first, in which is housed and axially moves the second portion of the traction member. 10 - The body is formed in one piece, the first and second parts of the body being parts of one and the same element. - The body is formed of two distinct parts, the first part of the body consisting of a bearing skirt supporting the second part of the body consisting of a cylinder. The annular chamber is formed axially between a radial base of the second body part and a radial flange of the second part of the traction element. The annular chamber is formed radially between the second bore of the second body portion and the axial tubular portion forming the first portion of the traction member. - The tensioning device comprises a docking key housed in the first part of the body and dedicated to be mounted co-axially around a nut screwed around the threaded rod, and a drive pin whose one end cooperates with the docking key and which passes through a radial opening made in the first part of the body. - The drive spindle can be operated manually or motorized. - The second part of the traction element comprises a cylindrical upper end provided with an external thread dedicated to cooperate with a nut, said nut being dedicated to come into abutment axially against the body to allow axially locking in position the second part of the traction element. The second body portion comprises at least one pressurized fluid supply conduit connected to the annular chamber, so as to fill said fluid. The traction element comprises at least one fluid supply duct connected to the annular chamber. Said supply duct may be provided with the first and / or second portion of the traction element. The second part of the body comprises a holding device in its outer periphery, for example a carbon tube strapping, so as to limit the radial deformation of the second part of the pressurized body. The constituent elements of the body and of the traction element are made of steel, for example of the type CND 8 or 10006. The sealing means are integrated in a cavity of a first mechanical element in order to come into contact with a second mechanical element to prevent fluid leakage and maintain pressure in the gap between the two elements. The second part of the traction element comprises a cavity incorporating sealing means in sliding contact with the second part of the body. - The second body part comprises a cavity incorporating sealing means in sliding contact with the first part of the traction element. - The sealing means comprise a first elastic ring 25 mounted in the cavity of the first mechanical element and a second ring more rigid than the first ring and in sliding contact with the second mechanical element, the first elastic ring ensuring a prestress on the second ring so as to ensure contact. - The first ring of the sealing means is elastomeric. The second ring of the sealing means is made of plastomer. The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment having a voltage device in accordance with its principle 3034821 -6, given only for for example and with reference to the accompanying drawings, in which: - Figure 1 shows a radial sectional view of a tensioning device in a first position, according to a first embodiment of the invention; - Figure 2 shows a radial sectional view of the device of the first embodiment in a second position; and - Figure 3 shows a radial sectional view of a voltage device according to a second embodiment of the invention.
    [0003] A tension device, of central axis X1 and referenced 1 as a whole, is intended to axially prestress a threaded rod 2. According to a first embodiment shown in FIGS. 1 and 2, the threaded rod 2 is then locked by a nut 3 intended to bear against a surface 4a of a structure 4, generally comprising at least two mechanical parts to be assembled, here represented in the form of a plate 4c and a frame 4b by way of example. It is also understood that the threaded rod 2 may also consist of a screw or a stud. The tensioning device 1 comprises a body 5 and a traction element 6.
    [0004] The body 5 comprises a first lower portion 7 consisting of a bearing skirt formed by a hollow axial tubular portion in which the threaded rod 2 is housed and can be displaced axially. A docking key 8 is housed in the bearing skirt 7. The docking key is mounted coaxially around the nut 3 screwed around the threaded rod 2. A driving pin 9 can actuate the key d. 8 at one of its ends and passes through a radial opening 7a made to the support skirt 7. The drive pin can be manually operated or motorized. The body 5 comprises a second upper part 10 consisting of a cylinder provided with a central opening 10a in which the traction element 6 is accommodated and moves axially. The cylinder 10 comprises a radial lower bearing surface 10b resting on the support skirt 7. The cylinder comprises a circumferential axial flange 10c forming an inner bore corresponding in shape to the outer cylindrical surface 7b of the bearing skirt, the latter being housed in the bore of the flange 10c 3034821 - 7 of the cylinder 10. This flange 10c serves the axial guidance of the cylinder 10 when it is mounted on the bearing skirt 7 and a retention preventing radial displacement during the implementation of the tension device 1 .
    [0005] The bearing skirt 7 and the cylinder 10 forming the body 5 are two separate parts in cooperation. Alternatively, the support skirt 7 and the cylinder 10 may be fixed integrally by suitable securing means or even form a single mechanical element. The traction element 6 comprises a first lower portion 11 consisting of a tie rod formed by an axial tubular portion provided with a central opening 11a comprising an internal thread cooperating with an external thread 2a of the threaded rod 2. The tie rod 11 can move axially in a first bore portion 10d of the central opening 10a of the cylinder 10. The outer cylindrical surface of the tie rod 11 corresponds with the inner cylindrical surface of the first bore portion 10d of the opening 10a. The pulling member 6 comprises a second upper portion 12 consisting of a piston formed by a cylindrical shape. The piston 12 can move axially in a second bore portion 10e of the central opening 10a of the cylinder 10. The outer cylindrical surface of the piston 12 corresponds with the inner cylindrical surface of the second bore portion 10e of the central opening 10a. The tie rod 11 and the piston 12 forming the pulling element 6 are two parts of one and the same element formed in one piece. Alternatively, the tie rod 11 and the piston 12 may be two distinct elements and fixedly secured by suitable securing means. The outer diameter of the piston 12 is strictly greater than the outer diameter of the tie rod, defining a lower radial flange 12a of the piston 12. As the central opening 10a of the cylinder 10 comprises a first 10d 30 and a second 10th bore portion in accordance with formed with the tie rod 11 and the piston 12 respectively, a radial base 10f is defined in the cylinder 10 at the junction of the first 10d and second 10th bore portions of the central opening 10a. The cylinder 10 comprises a feed conduit 13 in pressurized fluid opening to the radial base 10f. The fluid may be oil, air or a viscoelastic fluid material. Alternatively not shown, the traction element 6 may comprise the supply conduit 13 of pressurized fluid opening to the radial flange 12a. According to the invention, and as represented in FIGS. 1 and 2 according to a first embodiment, an annular chamber 14 is formed axially between the radial base 10f of the cylinder 10 and the radial flange 12a of the piston 12, and radially between the second bore portion 10 10e of the central opening 10a of the cylinder 10 and the axial tubular portion forming the tie rod 11. This annular chamber 14 has zero initial volume, the radial flange 12a resting on the radial base 10f, then when the pressurized fluid is conveyed through the conduit 13. In addition, according to the invention, the first bore portion 10d of the opening 10a of the cylinder 10 comprises an annular cavity provided with a first means of seal 15 in sliding contact with the outer surface of the tie rod 11. The piston 12 comprises in its outer surface an annular cavity provided with a second sealing means 16 in sliding contact with the second portion of the bore 10e of the opening 10a of the cylinder 20 10. The two sealing means 15 and 16 are positioned axially on either side of the annular chamber 14 so as to seal it when it contains fluid under pressure. Alternatively not shown, the positions of the annular cavities 15 and 16 can be interchanged between the first bore portion 10d and the tie rod 11 and / or between the second bore portion 10e and the piston 12. The means of 15, 16 may consist of a first elastic ring, for example of elastomeric material, mounted in the cavity and a second ring of more rigid material than the first ring, for example 30 plastomeric material, is in sliding contact with the element mechanical facing him. The first elastic ring then exerts a prestress on the second ring ensuring a contact. 3034821 - 9 - We will now describe, with the aid of Figures 1 and 2, the operation of the tensioning device of the threaded rod 2 in successive order of the steps. The threaded rod 2 is screwed into a corresponding threaded hole 4d of the frame 4b. The plate 4c is threaded onto the rod 2 until it is in contact with the frame 4b, the rod 2 passing through a hole 4e of inside diameter strictly greater than the outside diameter of the rod 2. The nut 3 is screwed onto the proximal portion 2b from the threaded rod 2 to 10 a support with the surface 4a of the plate 4c. The tensioning device 1 is threaded onto the threaded rod, so that the docking key 8 with its drive pin 9 is positioned around the nut 3, the bearing skirt 7 of the body 5 comes to bear. on the surface 4a of the plate 4c around the threaded rod 2 with its nut 3, the cylinder 10 bears against the supporting skirt 7, the pulling 11 of the traction element 6 is screwed onto the proximal part 2b of the threaded rod 2. In an initial configuration illustrated in FIG. 1, the radial flange 12a of the piston 12 bears against the radial base 10f of the cylinder 10. The threaded rod 2 undergoes no axial stress and then has a portion proximal 2b to be stretched. As illustrated in FIG. 2, a fluid under pressure is introduced into the duct 13 of the cylinder 10 between the radial base 10f and the radial flange 12a of the piston 12. Thanks to the sealing means 15 and 16, the piston 12 departs of the radial base 10f of the cylinder 10 and raises the tie rod 11. The annular chamber 14 is then formed between the traction element 6 and the body 5 of the tensioning device 1. The axial force to which the material of the threaded rod 2 causes an increase in the length of the rod 2. The nut 3 is then spaced axially from the bearing surface 4a of the plate 4c. Once the desired voltage is applied to the threaded rod 2, the drive pin 9 activates the docking key 8 which screws the nut 3 until it bears on the surface 4a of the plate 4. The pressure hydraulic is released and the tie rod 11 is unscrewed from the threaded rod 2. The nut 3 being in abutment against the structure 4, the threaded rod 2 remains stretched. Device 1 is then removed. Thanks to the invention, the radial hydraulic surface on which the fluid exerts a pressure is maximum between the second portion 10e of opening 10a of the cylinder 10, ie the bore portion of larger internal diameter, and the outer surface of the tie rod 11, the portion of the pulling element 6 of smaller outer diameter. For a given radial dimension of the device 1, and in particular the given radial dimensions of the piston 12 and the cylinder 10, it is possible to exert a much higher tension. Furthermore, for a given voltage to be applied, it is possible to reduce the radial size of the device 1, by reducing the radial dimension of the annular chamber 14 sufficiently to exert the desired voltage. A second embodiment is shown in Figure 3 and differs from the mode shown in Figures 1 and 2 in that a tensioning device 21, central axis X21, according to the invention consists of a hydraulic nut. The tensioning device 1 presented in the first mode consists of a tensioner, an apparatus intended to be reused to tension a plurality of threaded rods. The device 21 presented in this second mode consists of a hydraulic nut, which acts as both tensioner and nut. It remains at 20 on the structure 4. In the following description, the similar elements of Figures 1 to 3 retain the same references. The tensioning device 1 comprises a body 22 and a traction element 23. The body 22 comprises a first lower portion 24 consisting of a bearing skirt formed by a hollow axial tubular portion in which the threaded rod 2 is housed and may be moved axially. The body 22 comprises a second upper portion 25 consisting of a cylinder provided with a central opening 25a in which the traction element 23 is axially located and moves. The supporting skirt 24 and the cylinder 25 form the body 5. in one and the same mechanical element. Alternatively, the support skirt 24 and the cylinder 25 may be two separate parts in cooperation and / or fixedly secured by appropriate fastening means.
    [0006] The traction element 23 comprises a first lower portion 26 consisting of a tie rod formed by an axial tubular portion provided with a central opening 26a comprising an internal thread cooperating with an external thread 2a of the threaded rod 2. The tie rod 26 can moving axially in a first bore portion 25b of the central opening 25a of the cylinder 25. The outer cylindrical surface of the tie rod 26 corresponds with the inner cylindrical surface of the first bore portion 25b of the opening 25a. The pulling member 23 comprises a second upper portion 27 consisting of a piston formed by a cylindrical shape. The piston 27 can move axially in a second bore portion 25c of the central opening 25a of the cylinder 25. The outer cylindrical surface of the piston 27 corresponds with the inner cylindrical surface of the second bore portion 25c of the opening 25a.
    [0007] The outer diameter of the cylinder 27 is strictly greater than the outer diameter of the tie rod 26, defining a lower radial flange 27b of the piston 27. As the central opening 25a of the cylinder 25 comprises a first 25b and a second 25c matching bore portion With the tie rod 26 and the piston 27 respectively, a radial base 25d is defined in the cylinder 25 at the junction of the first 25b and second 25c bore portions of the central opening 25a. The tie rod 26 and the piston 27 forming the traction element 23 are two distinct elements and fixed integrally by suitable securing means. In the example illustrated here in FIG. 3, the piston 27 comprises a threaded bore 27a cooperating with a threaded portion 26b of one end of the tie rod 26. A pulling element 23 formed of two distinct and integral parts 26, 27 one of the other may have a certain advantage when the threaded rod 2 to tender has an outer diameter strictly greater than the inner diameter of the first bore portion 25a. Indeed, in such a case, the free end of the tie rod 26 has a radial dimension adapted to become integral with said threaded rod and is therefore strictly greater than the inner diameter of the first bore portion 25a. It is then necessary to provide a traction element 23 in two parts to define a piston 27 and a pulling end 26 on either side of the first bore portion 25a. Alternatively, the tie rod 11 and the piston 12 may be two parts of one and the same integrally formed element.
    [0008] The cylinder 25 comprises a feed conduit 13 of pressurized fluid opening to the radial base 25d. An annular chamber 14 is formed axially between the radial base 25d of the cylinder 25 and the radial flange 27b of the piston 27, and radially between the second bore portion 25c of the central opening 25a of the cylinder 25 and the axial tubular portion. forming the tie rod 26. This annular chamber 14 has zero initial volume, the radial flange 27b resting on the radial base 25d, then is formed when pressurized fluid is conveyed through the conduit 13. In addition, the first portion of 25b of the opening 25a of the cylinder 25 comprises an annular cavity provided with a first sealing means 15 in sliding contact with the outer surface of the tie rod 26. The piston 27 comprises at its outer surface an annular cavity provided with a second sealing means 16 in sliding contact with the second bore portion 25c of the opening 25a of the cylinder 25. The two sealing means 15 and 16 are positioned axially on either side of the cylinder. annular chamber 14 so as to seal it when it contains pressurized fluid. A nut 28 is screwed on an external thread 27c at an upper end 27d of the piston 27. The upper end 27d of the piston 27 has an outer diameter strictly smaller than the diameter of the piston body accommodating in the bore 25c of the cylinder 25. The nut 28 comprises a central bore provided with a first portion 28a of inner diameter corresponding to the diameter of the upper end 27d of the piston 27, said portion 28a having a thread cooperating with the thread 27c of said end 27d. The bore of the nut 28 comprises a second portion 28b cylindrical and of internal diameter equal to the outer diameter of the piston body housing in the bore 25c of the cylinder 25. The operation of the hydraulic nut 21 is similar to that of the tensioner 1, differing only in that once the threaded rod 2 is under tension and extended, the nut 28 is screwed onto the piston 27 until it comes into contact with an end bearing flange 25e upper cylinder 25. The hydraulic pressure is then released. The nut 28 being in abutment with the cylinder 25, the piston 27 and the tie rod 26 remain in position and keep the threaded rod 2 stretched. The device 21 then remains in position to ensure the fastening of the structure 4. The technical characteristics embodiments and variants envisaged above can be combined with each other.
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. A tensioning device (1, 21) comprising a traction element (6, 23) and a body (5, 22), so that: (a) the traction element (6, 23) comprises: - a first lower tensile element portion (11, 26) consisting of a tie rod which can be secured to a threaded rod (2), and - a second upper pull element portion (12, 27) consisting of a piston, the first (11, 26) and second portions (12, 27) of the traction member being integral in motion; (b) the pulling element (6, 23) has an axial movement in an opening (10a, 25a) of the body (5, 22) co-axially mounted around said pulling element (6, 23), the body ( 5, 22) comprising: - a first lower body portion (7, 24) consisting of a tubular support skirt, and - a second upper body portion (10, 25) consisting of a cylinder; and (c) an annular chamber (14) is formed between the pull member (6,23) and the body (5,22) and is adapted to receive pressurized fluid; characterized in that: (d) the annular chamber (14) is formed: - axially between the second traction element portion (12, 27) and the second body portion (8, 25), and - radially between the second body portion (10, 25) and the first portion of the pulling member (11, 26); and (e) the device (1, 21) comprises a sealing device comprising: - a first sealing means (15) is mounted radially between the second body portion (10, 25) and the first element part a second sealing means is mounted radially between the second body portion (10, 25) and the second portion of the pulling member (12, 27), and so that the two sealing means (15, 16) are positioned axially on either side of the annular chamber (14) so as to seal. 5
    [0002]
    Device according to claim 1, characterized in that the traction element (6) is formed in one piece, the first (11) and second parts (12) of the traction element (6) being parts of one and the same element. 10
    [0003]
    3. Device according to claim 1, characterized in that the pulling element (23) is formed of two distinct parts, the first part (26) of the pulling element (23) consisting of a tie rod is fixed in a manner secured in displacement by securing means (26b, 27a) with the second portion (27) of the pull element (23) consisting of a piston. 15
    [0004]
    4. Device according to any one of the preceding claims, characterized in that the annular chamber (14) is formed axially between a radial base (10f, 25d) of the second portion (10, 25) of the body (5, 22). and a radial flange (12a, 27b) of the second portion (12, 27) of the pulling member (6, 23).
    [0005]
    5. Device according to any one of the preceding claims, characterized in that the second part (10, 25) of the body (5, 22) consists of a cylinder provided with a first central bore (10d, 25b) in which is 25 housed and moves axially the first portion (11, 26) of the traction element (6, 23) and a second central bore (10e, 25c), coaxial with the first, in which is housed and moves axially the second portion (12, 27) of the traction element (6, 23). 30
    [0006]
    6. Device according to claim 5, characterized in that the annular chamber (14) is formed radially between the second bore (10e, 25c) of the second portion (10, 25) of the body (5, 22) and the tubular portion axial part forming the first part (11, 26) of the traction element (6, 23). 3034821 - 16 -
    [0007]
    7. Device according to any one of the preceding claims, characterized in that the tensioning device (1) comprises a docking key (8) housed in the first part (7) of the body (5) and dedicated to be mounted co-axially around a nut (3) screwed around the threaded rod (2), and a drive pin (9), one end of which cooperates with the docking key (8) and which passes through a radial opening (7a) made at the first part (7) of the body (5).
    [0008]
    8. Device according to any one of claims 1 to 6, characterized in that the second part (27) of the traction element (23) comprises a cylindrical upper end (27d) provided with an external thread (27c ) dedicated to cooperate with a nut (28), said nut (28) being dedicated to abut axially against the body (22) to allow axially locking in position the second portion (27) of the traction element (23). ). 15
    [0009]
    9. Device according to any one of the preceding claims, characterized in that the second portion (10, 25) of the body (5, 22) comprises at least one supply duct (13) in pressurized fluid connected to the chamber annular (14), so as to fill said fluid. 20
    [0010]
    10. Device according to any one of the preceding claims, characterized in that the sealing means (15, 16) are integrated in a cavity of a first mechanical element (10, 25; 12, 27) to come into contact. with a second mechanical element (11, 26; 10, 25) to prevent fluid leakage and maintain pressure in the gap between the two elements.
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    同族专利:
    公开号 | 公开日
    US20160297057A1|2016-10-13|
    DE102016205904A1|2016-10-13|
    FR3034821B1|2017-09-08|
    CN106041503A|2016-10-26|
    US10569401B2|2020-02-25|
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    JP6381842B1|2018-02-28|2018-08-29|株式会社東日製作所|Tensioning device|
    GB2580111B|2018-12-21|2021-04-28|Caterpillar Energy Solutions Gmbh|Device for tensioning a connecting element|
    CN110774205A|2019-10-07|2020-02-11|江苏擎邦机械有限公司|Ball socket wrench|
    法律状态:
    2016-04-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-10-14| PLSC| Search report ready|Effective date: 20161014 |
    2017-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-02| PLFP| Fee payment|Year of fee payment: 4 |
    2019-04-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-04-29| PLFP| Fee payment|Year of fee payment: 6 |
    2021-04-27| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1553039A|FR3034821B1|2015-04-09|2015-04-09|VOLTAGE DEVICE FOR PRE-STRESSING AN ASSEMBLY USING A THREADED ROD|FR1553039A| FR3034821B1|2015-04-09|2015-04-09|VOLTAGE DEVICE FOR PRE-STRESSING AN ASSEMBLY USING A THREADED ROD|
    US15/091,675| US10569401B2|2015-04-09|2016-04-06|Tensioning device for pre-stressing an assembly with a threaded rod|
    DE102016205904.1A| DE102016205904A1|2015-04-09|2016-04-08|Clamping device for biasing an assembly with a threaded rod|
    CN201610542867.9A| CN106041503A|2015-04-09|2016-04-08|Tensioning device for pre-stressing assembly with threaded rod|
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