RU132715U1 - TELESCOPIC DISTRACTION BAR - Google Patents

Abstract

A telescopic distraction rod, comprising a housing equipped with a hinge assembly, made in the form of a sleeve equipped with a through longitudinal groove, an inner tube coaxially located in the housing and a threaded rod with a screw distraction nut fixed, rotatably mounted on the inner tube, the inner tube being fixed in the housing a bolt with a nut installed in a through longitudinal groove and passing through a radial hole made on the inner tube, characterized in that at the end of the inner the nozzle holding the distraction nut made with a collar is planted, the screw located in the threaded hole on the inner tube abuts the threaded rod, the housing is equipped with internal and external threads at one end, and the hinge assembly consists of a ball head with a threaded shank installed in made with a spherical end face, an inner flange at one end and an internal thread at the other end, a sleeve, the sleeve being screwed onto the body, as well as a spherical nut located on the threaded shank and ryagaemoy with a spherical end of the sleeve.

Description

Distraction telescopic rod - refers to medical equipment, namely it is an element of devices used in orthopedics and traumatology for lengthening long tubular bones.

Known compression and distraction apparatus containing rings and arcs, retainer spokes, telescopic coupling screws made in the form of a sleeve with a bolt located and fixed in it, a threaded rod, spherical joints and fasteners, while each pair of telescopic coupling screws is connected by a spherical joint comprising a ball, a saddle and a fixing nut, the threaded end of one telescopic coupling screw being connected to the ball and the threaded end of another telescoping coupling screw connected to the saddle ohm (SU 374076 A1).

However, in this device, the ball of the spherical joint is not rigidly clamped by the fixing nut, and the telescopic coupling screw does not allow for dosed longitudinal movement of the threaded rod relative to the sleeve.

Known telescopic drive to the transdermal fixation apparatus, consisting of a threaded rod, with a nut and tube coaxially mounted on it, in which the nut has a spring-loaded rod, and the threaded rod stop has end recesses (SU 1629046 A1).

However, this device allows only metered longitudinal movement of the threaded rod relative to the tube and does not provide simultaneous longitudinal movement, as well as does not provide a fixed hinge assembly.

A device for transosseous osteosynthesis of Solomin-Utekhin-Vilensky is known, containing two rings and six telescopic rods connecting rings, each telescopic rod consisting of a cardan, a threaded rod, a nut, a sleeve, an axis and a clip, one end of the threaded rod is fixedly connected to the cardan, and the other end of the threaded rod passes through the sleeve and is connected to it by means of a nut rotating on it, the sleeve is connected by an axis to the cardan of the adjacent telescopic rod, the connection of the threaded rod with the sleeve, etc. aid freely rotating nut thereon and the connection sleeve with cardan adjacent telescopic arm via a biaxial hinge axes form (RU 2352283 C2).

However, in this device, the telescopic rod allows only metered longitudinal movement of the threaded rod relative to the tube and does not provide simultaneous longitudinal movement, and also does not provide a fixed hinge assembly.

A known external fixation apparatus containing supports, with bone clamps fixed to them by means of brackets and clamps, connected by telescopic rods containing an outer tube with a longitudinal groove, an inner tube coaxially located in it, with a distraction nut mounted on it with the possibility of rotation, and the inner tube is fixed in the outer bolt installed in the longitudinal groove and passing through the transverse hole in the inner tube, a saddle is mounted between the bolt and the tube, nt hinge assemblies, one of which is fixed to the outer tube and the other at the free end of the screw shaft (US 4,308,863 A1).

However, in the telescopic rod of this device, it is not provided for fixing in a given position of the hinge nodes, and blocking the spindle from arbitrary rotation.

The objective of the utility model is the development of a telescopic distraction rod containing a hinge, which provides rigid fixation in a given position, which allows both metered and instantaneous longitudinal movement of the threaded rod, as well as locking the threaded rod from arbitrary rotation.

The problem is solved in that in a telescopic distraction rod, comprising, equipped with a hinge assembly, a housing made in the form of a sleeve equipped with a through longitudinal groove, an inner tube and a threaded rod with a screwed distraction nut, mounted, rotatably mounted, rotated on the inner tube, and the inner tube is fixed in the housing by a bolt with a nut mounted in a through longitudinal groove, and passing through a radial hole made on the inner tube , on the end of the inner tube there is a nozzle holding the distraction nut made with a collar, a screw located in the threaded hole on the inner tube abuts the threaded rod, the housing is equipped with internal and external threads at one end, and the hinge assembly consists of a ball head with a threaded a shank installed in a sleeve made with a spherical end, an inner collar from one end, and a sleeve from the other, the sleeve being screwed onto the body, as well as a spherical nut located on the threads ov shank and mating with the spherical end face of the sleeve.

The utility model is illustrated by the description and diagrams, which depict:

Figure 1 - telescopic distraction rod, when folded, left view, in section;

Figure 2 - telescopic distraction rod, in the unfolded state, front view.

The telescopic rod is distraction, consists of a housing 1 (Figure 2), a hinge assembly 2 (Figure 2), an inner tube 3 (Figure 2), a threaded rod 4 (Figure 1; Figure 2), a distraction nut 5 (Figure .1; Fig. 2), nozzles 6 (Fig. 1; Fig. 2), screw 7 (Fig. 1), bolt 8 (Fig. 1) with nut 9 (Fig. 1). The housing 1 is made in the form of a sleeve 10 (Figure 1), equipped with a through longitudinal groove 11 (Figure 2), as well as, from one end, an external 12 (Figure 1) and an internal 13 (Figure 1) thread. The hinge assembly 2 comprises a ball head 14 (Fig. 1) with a threaded shank 15 (Fig. 1) installed in a sleeve 16 (Fig. 2) made with a spherical end face 17 (Fig. 1) and an inner shoulder 18 (Fig. 1) ) from one end and internal thread 19 (Fig. 1) from the other, as well as a spherical nut 20 (Fig. 1; Fig. 2) located on the threaded shank 15 and mating with the spherical end 17 of the sleeve 16. In this case, the sleeve 16 screwed by an internal thread 19 (FIG. 1) onto the external thread 12 of the housing 1. The housing 1, the inner tube 3, the threaded rod 4, the distraction nut 5 are located but. A distraction nut 5, equipped with a shoulder 21 (FIG. 1) is screwed onto the threaded rod 4 and rotatably mounted on the inner tube 3, by means of a nozzle 6, mounted on the end of the inner tube 3. The inner tube 3 contains a radial hole 22, and is fixed in the housing 1 by a bolt 8 with a nut 9 installed in the through longitudinal groove 11 of the housing 1 and passing through the radial hole 22. The screw 7 abuts the screw 7 located in the threaded hole 23 (Figure 1). The nozzle 6 can be installed on the inner tube 3 by means of a threaded connection 24 (Figure 1), and a screw 25 (Figure 1).

The telescopic distraction rod is used as follows.

The telescopic distraction rod is installed with a threaded rod 4 and a threaded shank 15 on the supports of the external fixation apparatus (not shown in the diagram), fixed with nuts (not shown in the diagram). To fix the rod in the reached position, the hinge assembly 2 is clamped by tightening the spherical nut 20 on the threaded shank 15 until it is in close contact with the spherical end face 17 of the sleeve 16, while the ball head 14 abuts against the inner flange 18 of the sleeve 16. For simultaneous longitudinal movement of the threaded rod 4 , loosen the nut 9 and move the inner tube 3 in the housing 1, while the bolt 9 moves freely along the through longitudinal groove 11 of the housing 1. Having reached the required position of the threaded rod 4, tighten the nut 9, on the bolt 8, thereby fixing the inner tube 3 in the housing 1. For the dosed longitudinal movement of the threaded rod 4, loosen the screw 7, and by rotating the distraction nut 5 achieve the longitudinal movement of the threaded rod 4. Having reached the desired position, the threaded rod 4 is blocked from arbitrary rotation, tightening screw 7.

Using a telescopic distraction rod allows you to rigidly fix it in a predetermined position, to perform both metered and simultaneous longitudinal movement of the threaded rod, and also to block the threaded rod from arbitrary rotation.

Claims (1)

A telescopic distraction rod, comprising a housing equipped with a hinge assembly, made in the form of a sleeve equipped with a through longitudinal groove, an inner tube coaxially located in the housing and a threaded rod with a screw distraction nut fixed, rotatably mounted on the inner tube, the inner tube being fixed in the housing a bolt with a nut installed in a through longitudinal groove and passing through a radial hole made on the inner tube, characterized in that at the end of the inner the nozzle holding the distraction nut made with a collar is planted, the screw located in the threaded hole on the inner tube abuts the threaded rod, the housing is equipped with internal and external threads at one end, and the hinge assembly consists of a ball head with a threaded shank installed in made with a spherical end face, an inner flange at one end and an internal thread at the other end, a sleeve, the sleeve being screwed onto the housing, as well as a spherical nut located on the threaded shank and ryagaemoy with a spherical end of the sleeve.

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