• 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:
    A trial fitting device for an implantable femoral prosthesis comprising a trial head, a bearing insert removably fitting within the trial head and a femoral prosthesis stem or a trial handle onto which said bearing insert is removably rotatably mounted is disclosed. Differently sized trial heads can be quickly substituted utilizing the trial fitting device of the present invention.
    公开号:SU841571A3
    申请号:SU782643646
    申请日:1978-07-21
    公开日:1981-06-23
    发明作者:С.Рил Ричард
    申请人:Миннесота Майнинг Мануфакчуринг Компани(Фирма)；
    IPC主号:
    专利说明:

    The invention relates to medical equipment, namely to joint prostheses of the lower extremities.
    A mounting device for a hip prosthesis is known, including a head 5 with a bearing insert installed in the head and a rod having a spherical support made in the form of a spherical segment — more than half a ball on which the bearing insert is mounted, the head being made in the form a spherical segment with a central hole and an annular groove, the bearing insert is made in the form of a cylinder with a rigid protrusion at one end having a domed upper part, with flexible tabs formed by slots on each other m end with an annular protrusion on the outer surface of the legs under the annular groove of the head, wherein the cylinder in flexible tabs zone spherical cavity formed by a spherical support rod, made by size more than a ball bearing, and the cylinder is made from a synthetic organic material [ΐ] ·
    However, the known device in its mounting and dismounting requires a complex manipulation ispoleo- 30 vaniem special tools, which delays the operation.
    The purpose of the invention is to simplify device installation and removal without using a tool.
    This goal is achieved by the fact that in the installation device for the prosthesis of the thigh, including the head, under the spike insert installed in. the head, and a rod having a spherical support made in the form of a spherical segment — more than half the ball on which the bearing insert is mounted, the head being made in the form of a spherical segment with a central hole and an annular groove, the bearing insert is made in the form of a cylinder with a rigid protrusion on one end, having a domed-shaped upper part, with flexible legs formed by slots - on. the other end, with an annular protrusion; on the outer surface of the legs under the annular groove of the head, and in the 2® cylinder in the aeon of flexible legs there is a spherical cavity under the spherical support of the rod, made in size more than a ball support, the cylinder is made of synthetic organic material, the head is made made of synthetic organic material with a through central hole with a difference in diameters, the bearing insert is also made with a difference in diameters under the hole of the head.
    In addition to the toga, the device contains a threaded handle and a button with a spherical surface of not more than half the ball by one An end and a threaded shank on the other end, as well as with an axial bore, wherein the button and bearing insert have a removable mount with the specified threaded handle in the form of a clamping sleeve 'mounted on the threaded shank and a bolt mounted in the axial bore and connecting said head and threaded handle.
    In FIG. 1 shows an installation device for a hip prosthesis in a disassembled state, a longitudinal section; in FIG. 2 - the same, in assembled condition; in FIG. 3 - installation device with a threaded handle for fitting, longitudinal section.
    The installation device for the prosthesis comprises a head 1, a bearing insert 2 mounted in the head and a shaft 3 having a spherical support 4. The support 4 is made in the form of a spherical segment — more than a hemisphere on which the bearing insert 2 is mounted, while the head 1 is made in in the form of a spherical segment with a central hole 5 and an annular ^ groove 6. The bearing insert 2 is made in the form of a cylinder with a rigid protrusion 7 at one end having a domed upper part, flexible tabs 8 formed by slots on the other at the end, with an annular protrusion 9 on the outer surface of the blades under the annular groove 6 of the head, and in the cylinder in the area of flexible legs 8 a spherical cavity 10 is formed for the spherical support 4 of the rod, made in size larger than the spherical support. Moreover, the cylinder is made of synthetic organic material, and the dimensions of the spherical cavity 10 and the ball joint 4 interacting with it provide free rotation of the latter in the bearing insert 2.
    The head 1 is made of synthetic organic material with a through hole with a differential diameter, and the smaller diameter hole is designed to accommodate a rigid protrusion 7 of the bearing insert 2, which is also made with a diameter difference for the head hole.
    To enable the fitting of the head 1, the device is equipped with a threaded handle 11 and a button 12 with a spherical surface less than the hemisphere at one end and a tail 13 with a thread on the other. In addition, the button 12 has an axial hole, and the bearing insert 2 and the specified button 12 have a removable fastening by a threaded handle 11 in the form of a clamping sleeve 14 mounted on a shank 13 with a thread. A bolt 15 is mounted in the axial hole of the button 12, connecting a special bearing insert 16 and a threaded handle. Moreover, the bearing insert 16 used for fitting the head is made with a through channel communicating with the spherical cavity., Interacting with the spherical surface of the button 12. In addition, in the bearing insert 2 there is no hard protrusion.
    The installation device operates as follows.
    When assembling the device, the 4-degree ball bearing is inserted into the bearing insert 2, while the flexible tabs are bent outward when the support enters the spherical cavity 10 of the insert. With the final placement of the ball joint 4 in the spherical cavity 10, the flexible tabs 8 cover the lower cut of the sphere of the ball joint, preventing the free exit of the latter from the bearing insert 2 (Fig. 2). Then, the bearing insert 2 is connected to the head 1, while due to the elastic properties of the legs 8, which are folded inward when the insert 2 enters the central hole of the head,. the latter covers the bearing insert. The annular protrusion 9, made on the outer surface of the legs 8, is combined with the annular groove 6 of the head, ensuring the fixation of the bearing insert 2 in the Central hole 5 of the head.
    To disconnect the head with the bearing insert 2, press on the hard protrusion 7 of the latter. Under the action of pressure on the protrusions 7, the flexible tabs 8 bend inwardly, the protrusion exits the annular groove 6 of the head and the insert 2 is extruded from the central hole of the head.
    When carrying out the fitting operation, a handle 11 is used, on which a button 12 with a special bearing insert 16 is fixed using a bolt 15 (Fig. 3). After placement in the Central hole of the head of the insert 16, the latter is fixed in this position by screwing the sleeve 14 on the shank 13 of the button.
    Thus, the design of the device simplifies its installation and provides its removal without a tool, which reduces operating time.
    权利要求:
    Claims (2)
    [1]
    The invention relates to medical technology, namely to endoprostheses of the joints of the lower extremities. A mounting device for a hip prosthesis is known, including a head bearing insert installed in the head, and a rod having a spherical segment — more than a half-ball on which a bearing insert is installed, the head is made in the form of a spherical segment with a central bore and an annular groove; the bearing insert is made in the form of a cylinder with a rigid lug on one m end, having a dome-shaped upper part, flexible legs formed by slots at the other end, with an annular protrusion on the outer surface of the legs under the annular groove of the head, and in the cylinder in the zone of flexible legs there is a spherical cavity under the ball-bearing rod, made larger than the ball bearing, and the cylinder is made of synthetic organic material til However, the known device when installing and removing it requires complicated manipulations using special tools, which atm pulls the operation. The purpose of the invention is to simplify installation of the device and removal without using a tool. The goal is achieved by the fact that in the installation device for a hip prosthesis, including a head, a bearing assembly, installed in. head, and the rod having a ball bearing, made in the form of a spherical segment - more than half a ball, on which the bearing insert is installed, while the head is made in the form of a spherical segment with a central bore and an annular groove, the bearing insert is made in the form of a cylinder with a rigid protrusion on one end, having a dome-shaped upper part, flexible legs, formed by a slit. the other end, with an annular protrusion on the outer surface of the legs under the ring groove of the head, with a spherical cavity formed under the ball bearing of the rod in the cylinder in the zone of flexible legs, made more than a ball bearing, the cylinder is made of synthetic organic material, the head is made of synthetic organic matter. with a through central hole with a diameter difference, the bearing insert is also made with a differential diameter under the head hole. In addition to the toga, the device contains a threaded knob and a button with a spherical surface of no more than half of the ball on one side, and a threaded shank on the other end, as well as an axial bore, while indicated by the button and the bearing insert have a removable mount with the specified a threaded grip in the form of a clamping coupling mounted on a threaded shank, and a bolt mounted in an axial bore and connecting said head and a threaded grip. FIG. 1 shows a disassembled installation device for a hip prosthesis, longitudinal section; in fig. 2 - the same, in the assembled state; in fig. 3 - mounting device with threaded grip for fitting, longitudinal section. The installation device for protege contains a head 1, a bearing insert 2 installed in the head and a rod 3 having a ball bearing 4. The support 4 is made in the form of a spherical segment — more than a hemisphere on which the bearing insert 2 is installed, while the head 1 made in the form of a spherical segment with a central bore 5 and an annular groove 6. Bearing insert 2 is made in the form of a cylinder with a rigid protrusion 7 on one end, having a dome-shaped upper part, with flexible legs 8 formed by slits on each m end, with an annular projection 9 on the outer surface of the blades by the annular groove 6 of the head, wherein the cylinder in flexible tabs zone 8 formed spherical cavity 10 under the ball joint 4 Sterzh n, configured in size more than a ball bearing. Moreover, the cylinder is made of synthetic organic material, and the dimensions of the spherical cavity 10 and the ball bearing 4 cooperating with it ensure the free rotation of the latter in the bearing insert 2. The head 1 is made of synthetic organic material with a CKBO3HEJM central hole with a differential diameter, and the smaller diameter hole is designed to accommodate a rigid protrusion 7 of the bearing insert 2, which is also made with a difference in diameters under the head bore. To enable the fitting of the head 1, the device is equipped with a threaded handle 11 and a button 12 with a spherical surface less than a hemisphere at one end and needles with a tonic 13 threaded at the other. In addition, the button 12 has an axial bore and a bearing insert 2 and the indicated button 12 have a removable fastening with a threaded grip 11 in the form of a clamping clutch 14 mounted on a threaded shank 13. A bolt 15 is mounted in the axial hole of the button 12, connecting the special bearing insert 16 and the threaded handle. Moreover, the bearing insert 16, used for fitting the head, is provided with a through channel communicating with a spherical cavity, interacting with the spherical surface of the button 12. In addition, there is no rigid protrusion in the bearing insert 2. The installation device operates as follows. When assembling the device, the ball bearing of the 4th degree is inserted into the bearing insert 2, while the flexible legs 8 are bent outward when the bearing enters the spherical cavity 10 of the insert. At the final placement of the ball bearing 4 in the spherical cavity 10, the flexible legs 8 cover the lower section of the sphere of the ball bearing, an obstruction to the free exit of the latter from the bearing insert 2 (Fig. 2). Then, the bearing insert 2 is connected to the head 1, herewith, due to the elastic properties of the tabs 8, which are folded inwards when the insert 2 enters the central hole of the head, the latter covers the bearing insert. The annular protrusion 9, made on the outer surface of the tabs 8, is aligned with the annular groove 6 of the head, ensuring that the bearing insert 2 is fixed in the central hole 5 of the head. To separate the head from the bearing insert 2, press on the hard protrusion 7 of the latter. Under the action of pressure on the protrusions 7, the flexible legs 8 are folded inwardly, the protrusion 9 emerges from the annular groove 6 of the head and the insert 2 is pulled out from the central hole of the head. During the implementation of the fitting operation, a button 11 with a special bearing insert 16 is fastened with the bolt 15 by means of a bolt 15 (Fig. 3). After being placed in the central hole of the head of the insert 16, the latter is fixed in this position by screwing the sleeve 14 along the shank 13 of the button. Thus, the design of the device simplifies its installation and ensures its removal without tools, which reduces the operating time. Claim 1. The installation device for a hip prosthesis, including a head, a bearing insert installed in the head, and a rod having a ball bearing, made in the form of a spherical segment - more than half a ball, on which the bearing insert is installed, while the head is made in the form of spherical segment with a central bore and an annular groove, the bearing insert is made in the form of a cylinder with a rigid line at one end, having a dome-shaped upper part, flexible legs formed of a prop At the other end, with protrusion rings, on the outer surface of the tabs under the annular groove of the head, with a spherical cavity formed under the ball-bearing of the rod in the cylinder in the zone of flexible legs, the ball-shaped body is made of synthetic organic material, This is in order, in order to simplify installation of the device and removal without the use of a tool.
    the head is made of synthetic organic material with a through central hole with a diameter difference, the bearing insert is also made with a diameter difference under the head hole.
    [2]
    2. A mounting device according to claim 1, characterized in that it comprises a threaded handle and a button with a spherical surface of no more than half of the ball at one end and a threaded shank at the other end, as well as with an axial hole, wherein said button and The bearing insert has a removable fastener with a specified threaded grip in the form of a clamping coupling mounted on a threaded shank and a bolt mounted in an axial bore and connecting said head and threaded grip.
    Sources of information. Taken into account psi expertise
    1. US Patent No. 3863273, cl. 3.1, 1975.
    (f "-1
    Fig.d
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    同族专利:
    公开号 | 公开日
    DE2826690A1|1979-02-01|
    GB2001247A|1979-01-31|
    US4135517A|1979-01-23|
    JPS5422994A|1979-02-21|
    CH638093A5|1983-09-15|
    DE2826690C2|1987-11-19|
    GB2001247B|1982-02-10|
    AU521866B2|1982-05-06|
    JPS628178B2|1987-02-21|
    CA1118957A|1982-03-02|
    FR2397828A1|1979-02-16|
    FR2397828B1|1981-01-09|
    AU3819678A|1980-01-24|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/817,551|US4135517A|1977-07-21|1977-07-21|Femoral prosthesis trial fitting device|
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