Fixing clamp with spacer

Abstract

A clamping device of an external fixation system has a jaw set having a channel at one end configured to hold an element from a first size range and a second channel configured to hold an element from a different size range. The jaw set includes a first jaw, a second jaw, and a slide interposed between the first jaw and the second jaw that moves to a first position when a first element is in the first channel and moves to a second position when a second element is in the second channel.

Description

[0001] priority

[0002] This disclosure claims priority and benefit to U.S. non-provisional patent application No. 16 / 209,215, filed December 4, 2018; U.S. provisional patent application No. 62 / 689,437, filed June 25, 2018; and U.S. provisional patent application No. 62 / 595,344, filed December 6, 2017, both of which are incorporated herein by reference in their entirety. Background Technology

[0003] External fixation systems are used to construct a frame that rigidly holds bone fixation elements (such as pins, rods, or bars). The variability of the different conditions being treated (such as fractures) necessitates the versatility of the fixator frame's alignment and sizing. A common style of external fixation system uses fixation elements (i.e., rods and bone pins) and clamps that hold the fixation elements together. Typically, both pins and rods have a circular cross-section, but the rod's diameter is usually larger than the pin's diameter. For large frames used for legs and arms, the most common rod size is 11 mm, but they can vary between 8 and 13 mm, and the most common pin size is 5 mm, but they can vary between 3 and 6 mm. Clamps are used to attach pins to rods and rods to other rods. The most common type of clamp has a threaded shaft that can press two jaw assemblies together, thereby clamping them together and holding the elements in each jaw assembly. Although jaw assemblies can be configured to grip elements within a certain size range, fitting elements with diameter differences exceeding twice their size into jaw assemblies that are both compact and effective in terms of locking strength has always been a challenge. For this reason, most clamping systems have jaws configured to grip rods or pins, and therefore clamps configured to grip rods in one jaw assembly and pins in another, as well as a separate clamping assembly configured to grip rods in each jaw assembly.

[0004] Using separate clamps to connect two rods compared to connecting a rod to a pin presents problems. During medical procedures, users can accidentally pick the wrong one, resulting in wasted time. For desired frame geometry, the shaft-tightening element will be in an inconvenient position. Furthermore, it increases the number of clamps that need to be sterilized and used in every situation. To overcome some of these drawbacks, clamps have been developed that can receive both rods and pins in each jaw assembly. One of the earliest examples is the Synthes combination clamp, which has two grooves on each jaw in the jaw assembly, one sized for a rod and one sized for a pin. These jaws open to receive the rod or pin element to allow it into the groove, and they clamp the element by being pressed together onto it via a shaft.

[0005] Figures 1a and 1b illustrate such a conventional clamp 10. This clamp has a first jaw assembly 11 and a second similar jaw assembly 11a. These two jaw assemblies are similar, therefore the similar entries in the second jaw assembly are numbered the same as those in the first jaw assembly, but with the prefix "a". Each jaw assembly is configured to hold either a first fixing element 12 or a second fixing element 13. In some examples, the first jaw assembly includes an outer jaw 15 and an inner jaw 16. The outer jaw 15 has a first groove 17 and a second groove 18. The inner jaw 16 has a first groove 19 and a second groove 20. The first grooves 17 and 19 form a first channel 21, and the second grooves 18 and 20 form a second channel 22. The first element 12 can be placed in the first channel 21, and the inner jaw 16 and outer jaw 15 are slightly open, thus making contact near the second channel 22 at edge 23. As shown in Figure 1a, in the second jaw assembly 11a, the second element 13 can be placed in the second channel 22a. The inner jaw 16a and outer jaw 15a are slightly open, thus making contact at edge 24 near the first channel 21a. As shown in FIG1b, when a third element 14, similar in size to the first element 12, is placed in the first channel 21a, the second jaw assembly 11a may contact at edge 23a. In various embodiments, to clamp the element into the jaw assembly, the threaded shaft 25 and nut 26 may be tightened, thereby compressing both the jaw assembly and the element. Because edges 23 and 24 in contact are closer to the clamping force than elements 12, 13, or 14, these edges can bear a larger share of the clamping load. Moreover, since the user has access to both the first channel 21 and the second channel 22, one element may be mistakenly introduced into the jaw assembly when the other element is already in place, thus forcing the two elements parallel. Although there may be situations where this is necessary, often the goal is to clamp the elements together in a non-parallel orientation.

[0006] Another concept from Chreene and Austin (US 8,821,491) is similar, but the jaws in each set slide laterally relative to each other to allow rod or pin elements to enter the jaws. The Chreene clamp also holds elements by being pressed against them.

[0007] Both the Synthes combination clamp and the Chreene design have drawbacks. One example drawback is that, compared to a standard single-sided clamp, the amount of force transferred to the component via the jaw geometry is reduced. In these two-jaw style clamp designs, the locking force generated by the shaft is divided between the clamping force on the component and the reaction force between the two jaws as they pivot. Because the contact position between the two jaws moves closer to the line of action of the clamping force, the relative reaction force at that position increases, and the reaction force acting between the jaws and the component decreases.

[0008] Cremer et al. (US 8,827,997) presented another jaw assembly capable of holding components of more than one size. This jaw assembly for clamping components has exactly three sets of channels. Each set of channels is designed to hold a component of a specific size. It suffers from drawbacks similar to the double-sided design discussed above.

[0009] Brown and Denlinger (US Patent Publication 2009 / 0036891) demonstrated an alternative method for clamping components with large dimensional differences. The jaw assembly has two channels (a smaller channel closer to the fastener and a larger channel farther from the fastener) located on one side of the fastener.

[0010] Miller and Mullaney (US 9,138,260) demonstrated another method for clamping components of different sizes, wherein the jaw assembly has channels or other clamping devices on one side of the fastener. On the other side of the fastener, spacers with steps or catches are inserted between the jaws. Depending on the position of the spacers, the jaws are arranged to hold a component of a specific size by allowing the jaws to move to a position that allows the channels to open to a specific size. In this design, the primary purpose of the spacers is to configure the clamp to temporarily lock the component when the spacers are in the correct position. One disadvantage of this design is that the spacers can move to the wrong position, causing the jaw assembly to be configured for a component size different from the intended size. Another disadvantage is the difficulty in configuring the jaw channels and steps to allow for effective clamping of components with a size difference of up to twice.

[0011] Therefore, additional external fixing fixtures are needed to address at least one deficiency in the current level of technology, whether stated above or not. Summary of the Invention

[0012] Consistent with some embodiments, the basic design of the external fixation system clamp incorporates jaw assemblies for clamping the fixation elements and fasteners for pressing the jaw assemblies together. Most clamps have two jaw assemblies, allowing two fixation elements to be clamped together; however, a single jaw assembly can be attached to another device to clamp a fixation element to that other device. Each jaw assembly consists of two jaw halves. Typically, the jaw halves are separate components that rest against each other, with a first end of each component forming a channel for receiving the fixation element, and a second end of the component balancing the clamping load. Fasteners that apply the clamping load can be inserted between the channel and the rear end of the jaw component.

[0013] The first benefit of the system described in this article is its ability to clamp components of different sizes or shapes within a single jaw assembly. Most external fixation systems have a variety of components of different sizes. The most common configuration is a larger bar for traversing the defect and a smaller pin for fixation into the bone. This jaw assembly, with its jaws that can grip either the bar or the pin, or either of the two fixation components, can be used in a variety of situations. This reduces the need for several different clamps with different jaw assemblies specific to each fixation component.

[0014] A second benefit of the systems described in this paper is that they can deliver a higher clamping load to the fixing element for the same fastener load. Other devices that allow jaw assemblies to clamp fasteners of more than one size have trade-offs in their geometry, which reduces the amount of fastener load transferred through the fixing element due to force balancing on the jaws. By utilizing a slider to position the reaction force further away from the fastener load, the clamping force utilizes a higher amount of fastener load. This benefits the user, as they can achieve better stability when pre-tightening the clamp using only finger force. Finger force is sufficient to prevent the clamp from slipping before final tightening. Furthermore, for the same amount of load applied to the fastener, the final tightening will be more stable.

[0015] The exemplary embodiments described herein include jaw components, each jaw component having a groove at a first end that together forms a channel for a larger fixing element, and a groove at an opposite second end that together forms a channel for a smaller fixing element. A slider is positioned between the two jaw components. When a fixing element is introduced into the desired channel, the slider moves toward an unused channel. The slider is positioned such that clamping force is transmitted from one jaw component to the other through the fixing element and the slider. The slider is configured such that the contact points between the outer jaw and the slider, and between the slider and the inner jaw, are located away from the fastener opposite the fixing element.

[0016] The fastener applies a load to the outer jaws, which distribute the load between the component and the slider. The further the contact point with the slider moves away from the fastener, the higher the load share sent through the component. Conventional combination clamps without sliders have their contact points very close to the fastener, meaning a high share of the load passes through the contact point and a low share passes through the component.

[0017] Example embodiments include a slider inserted between two jaws that flip relative to each other to allow a retaining element to enter a channel. Another configuration positions the slider between an inner jaw and an outer jaw, with the outer jaw sliding relative to the inner jaw to allow the retaining element to enter a channel. For a load to be applied to the fastener in either channel, the fastener must be slightly larger than the channel. For conventional sliding head clamps, the outer jaw must flip relative to the inner jaw to allow it to slide rearward into place. Although this flip would be small, in practice, the fastener loads the outer jaw unevenly. In one embodiment of the invention, the outer jaw and slider are configured to contact only at the point furthest from the retained fastener. The outer jaw has a notch in the track at which it contacts the slider. When the retaining element is in place, the slider is moved proximally to a point adjacent to the notch and distally to contact the outer jaw.

[0018] The jaw assembly can be connected to a mating jaw assembly. An example embodiment shows radial serrations on the inner side of the inner jaw, which can abut against matching serrations on the matching inner jaw of the mating jaw assembly. These same serrations can also be paired with matching serrations on other devices. When the fastener is tightened, the serrations lock together, and the securing element is clamped.

[0019] The jaw assembly can be mated to other jaw assemblies or other devices via other components. One embodiment attaches the jaw assembly to a ball joint, allowing the jaw assembly to rotate relative to another device. Another embodiment has inner jaws that mat to a saddle, allowing the jaw assembly to roll relative to another device.

[0020] In another exemplary aspect, the device may be an external fixing frame that includes a clamp with a jaw assembly, wherein one side of the jaw assembly is configured to hold a first element and the other side is configured to hold a second element of a different shape or size, wherein a slider is inserted between the first jaw and the second jaw of the jaw assembly, and wherein the slider slides between a first position and a second position, wherein the first position helps to hold the first element and the second position helps to hold the second element.

[0021] In an exemplary aspect, this disclosure relates to an external clamping device configured to retain a fixing element. The external clamping device may include an inner jaw having a first end shaped to engage a first-sized fixing element and a second end shaped to engage a second-sized fixing element. An outer jaw may include a first end shaped to engage a first-sized fixing element and a second end shaped to engage a second-sized fixing element. A fastener may be configured to clamp the inner and outer jaws to at least one of a first and a second fixing element, and the fastener may have an axis. A sliding spacer may be inserted between the inner and outer jaws and may be arranged to slide in a direction transverse to the axis of the fastener. The sliding spacer may be structurally associated with the inner and outer jaws such that when a first-sized fixing element is introduced between the inner and outer jaws, the sliding spacer moves to a first position in which the sliding spacer contacts at least one of the inner and outer jaws at a first point remote from the fastener. When the second-sized fixing element is introduced between the inner jaw and the outer jaw, the sliding spacer can be moved to a second position in which the sliding spacer contacts at least one of the inner jaw and the outer jaw at a second point away from the fastener.

[0022] In some aspects, the outer jaws are configured to be inclined relative to the inner jaws to allow a retaining element to enter between the inner and outer jaws. In some aspects, the outer jaws are configured to slide relative to the inner jaws to allow a retaining element to enter between the inner and outer jaws. In some aspects, the first ends of the inner and outer jaws are configured to hold a retaining element with a diameter between 10 and 13 mm, and the second ends of the inner and outer jaws are configured to hold a retaining element with a diameter between 3 and 6.5 mm. In some aspects, the first ends of the inner and outer jaws are configured to hold a retaining element with a diameter between 6 and 9 mm, and the second ends of the inner and outer jaws are configured to hold a retaining element with a diameter between 3 and 5 mm. In some aspects, the first ends of the inner and outer jaws are configured to hold a retaining element with a diameter between 4 and 6 mm, and the second ends of the inner and outer jaws are configured to hold a retaining element with a diameter between 2 and 4 mm. In some aspects, the first ends of the inner and outer jaws are configured to hold a fixing element with a diameter of 11 mm, and the second ends of the inner and outer jaws are configured to hold a fixing element with a diameter of 5 mm. In some aspects, the clamp further includes: a second inner jaw disposed along an axis relative to the first inner jaw; and a second outer jaw, wherein the second inner and outer jaws are configured to cooperatively clamp the second fixing element. In some aspects, the clamp may include a saddle component, and the inner jaws may be configured to mate with the saddle component in a manner that allows the inner jaws, outer jaws, and sliding spacer to roll about an angle transverse to an axis of one of the first-sized and second-sized fixing elements and also transverse to the axis of the fastener. In some aspects, the inner jaws are configured to mate with a ball, such that the inner and outer jaws are configured to pitch, roll, and yaw relative to the device including the ball.

[0023] In another exemplary aspect, this disclosure relates to a jaw assembly of an external fixing clamp. The jaw assembly may include: an inner jaw having a first end configured to engage a first fixing element and a second end configured to engage a second fixing element; an outer jaw having a first end configured to engage the first fixing element and a second end configured to engage the second fixing element; and a fastener configured to clamp the inner and outer jaws to one of the first and second fixing elements. The fastener may have an axis. A sliding spacer may cooperatively engage the inner and outer jaws, and when said one of the first and second fixing elements is disposed between the inner and outer jaws, the sliding spacer may slide in a direction transverse to the axis of the fastener and transverse to the axis of said one of the first and second fixing elements. When one of the first and second fixing elements is introduced between the first end of the inner jaw and the first end of the outer jaw, the sliding spacer can move to a first position, in which the sliding spacer contacts at least one of the inner and outer jaws at a first position near the second end of either the inner or outer jaw. Alternatively, when one of the first and second fixing elements is introduced between the second end of the inner and outer jaws, the sliding spacer can move to a second position, such that the sliding spacer contacts at least one of the inner and outer jaws at a second position near the first end of either the inner or outer jaw.

[0024] In one aspect, the first end of the inner jaw and the first end of the outer jaw form a first channel configured to hold a first fixing element of a first size, and the second end of the inner jaw and the second end of the outer jaw form a second channel configured to hold a second fixing element of a second size, which is different from the first size. In another aspect, the first end of the inner jaw and the first end of the outer jaw form a first channel configured to hold the first fixing element when it is a non-cylindrical element, and the second end of the inner jaw and the second end of the outer jaw form a second channel configured to hold the second fixing element when its shape is different from that of a non-cylindrical element. In another aspect, the second end of the inner jaw and the second end of the outer jaw are configured to hold the second fixing element when it is a cylindrical element. In yet another aspect, the second end of the inner jaw and the second end of the outer jaw are configured to hold the second fixing element when its shape is proportionally the same as that of the first fixing element but its size is different.

[0025] In another exemplary aspect, this disclosure relates to an external clamping fixture configured to clamp a range of fixing elements. The clamp may include inner jaws having a first end and a second end, and may also include outer jaws having a first end and a second end. The first ends of the inner and outer jaws may be configured to cooperatively form a first channel sized to clamp a first fixing element of a first size. The second ends of the inner and outer jaws may be configured to cooperatively form a second channel sized to clamp a second fixing element of a second size. A fastener may be configured to clamp the inner and outer jaws to at least one of the first and second fixing elements. The fastener may have a fastener axis. A spacer may be slidably movable relative to the inner and outer jaws. When a first fixing element of the first size is introduced into the first channel, the spacer may be arranged to slide and intersect with a second channel. When a second fixing element of the second size is introduced into the second channel, the spacer may be arranged to slide and intersect with the first channel.

[0026] In another exemplary aspect, this disclosure relates to an external clamping fixture configured to hold a range of fixing elements. The clamping fixture may include inner jaws, outer jaws, a fastener, and a spacer. The spacer is slidably movable relative to the inner and outer jaws and slidable between a first channel and a second channel. When a first fixing element of a first size is introduced into the first channel, the spacer engages one of the inner and outer jaws at a first fulcrum. When a second fixing element of a second size is introduced into the second channel, the spacer engages one of the inner and outer jaws at a second fulcrum. The first fulcrum may be located on a first lateral side of the fastener axis, and the second fulcrum may be located on a second, different lateral side of the fastener axis.

[0027] In another exemplary aspect, this disclosure relates to a jaw assembly of an external clamping fixture, the jaw assembly having an outer jaw, an inner jaw, and a fastener. The claims may also include a rotating component having a convex surface shaped to mate with a concave surface of the inner jaw. The inner jaw may be configured to mate with the rotating component and allow the inner and outer jaws to roll about an axis transverse to both the axis of the clamping element and the axis of the fastener.

[0028] In one aspect, the second ends of the inner and outer jaws are configured to cooperatively form a second channel, the second channel being sized to clamp a second fixing element having a second size. The jaw assembly of the clamp may also include a sliding spacer slidably associated with the inner and outer jaws for sliding in a direction transverse to the axis of the fastener. The spacer may be structurally associated with the inner and outer jaws such that when a fixing element of the first size is introduced into the first channel, the sliding spacer moves to a first position in which it contacts at least one of the inner and outer jaws at a first position remote from the fastener. Alternatively, when a fixing element of the second size is introduced into the second channel, the sliding spacer can move to a second position in which it contacts at least one of the inner and outer jaws at a second position remote from the fastener.

[0029] In one aspect, the rotating component is configured to lock the first and second jaws obliquely relative to the fastener while the fastener clamps the inner and outer jaws to at least one fixing element. In one aspect, the convex surface of the rotating component is annular. In one aspect, the convex surface of the rotating component is cylindrical. In one aspect, the convex surface of the rotating component is a shape composed of two cones. In one aspect, the convex surface of the rotating component is partially spherical. In one aspect, the rotating component has a serrated surface opposite the convex surface. In one aspect, the outer jaw has a convex surface. In one aspect, the convex surface of the outer jaw mates with the flat surface of the fastener. In one aspect, the convex surface of the outer jaw mates with a washer inserted between the outer jaw and the fastener. In one aspect, the washer is incorporated into the convex surface to contact the outer jaw.

[0030] In one aspect, this disclosure relates to an external fixing clamp comprising a jaw assembly including an outer jaw and an inner jaw, thereby forming a channel therebetween. The jaw assembly may be configured to capture a rigid fixing element within the channel. The inner jaw may have a cavity on a surface opposite to the outer jaw. A clamping mechanism may be arranged to maintain axial alignment of the outer and inner jaws. A reference member may be biased from the jaw pair along a longitudinal axis. A coupling mechanism may be arranged between the jaw assembly and the reference member. The coupling mechanism may allow the jaw assembly to rotate relative to the reference member about a longitudinal axis. The coupling mechanism may include a convex surface that abuts against a cavity on the surface of the inner jaw opposite to the outer jaw, and the jaw assembly may pivot on the coupling mechanism about a transverse axis perpendicular to the longitudinal axis.

[0031] In one aspect, the clamping mechanism is a nut combined with a threaded stud. In another aspect, the nut includes a flat surface that hinges against a curved outer surface of the outer jaws, and the nut may be rotatable to lock the hinge of the jaw assembly when tightened onto the stud. In another aspect, the clamp may include a washer between the nut and the curved outer surface of the outer jaws. In another aspect, the washer includes a curved surface that engages against the curved outer surface of the outer jaws. In another aspect, the jaw assembly is configured to capture a rigid element of a second dimension.

[0032] In one aspect, the reference component comprises an external retaining clamp configured to hold a retaining element. The reference component may include an inner jaw having a first end shaped to engage a retaining element of a first size and a second end shaped to engage a retaining element of a second size. The outer jaw has a first end shaped to engage a retaining element of the first size and a second end shaped to engage a retaining element of the second size. A fastener, having an axis, may be configured to clamp the jaws to at least one of a first retaining element and a second retaining element. A sliding spacer may be inserted between the jaws and arranged to slide in a direction transverse to the axis of the fastener. In one aspect, when a clamping force is applied, the clamping mechanism locks both the retaining element and the hinged device. Attached Figure Description

[0033] The accompanying drawings illustrate embodiments of the apparatus and methods disclosed herein and, together with the specification, serve to explain the principles of this disclosure.

[0034] Figure 1a shows a conventional device with a jaw assembly having two channels, wherein a first channel is configured to hold an element of a first size, and a second channel is configured to hold an element of a different size.

[0035] Figure 1b shows a conventional device with a jaw assembly having two channels, wherein the first channel of the two jaw assemblies is configured to hold an element of a first size.

[0036] Figure 2 A simple external fixing frame of one type according to one or more aspects of this disclosure is shown, which uses a clamp incorporating the jaw assembly of the present invention.

[0037] Figure 3 It is a perspective view of a fixture according to one or more aspects of this disclosure.

[0038] Figure 4 Based on one or more aspects of this disclosure Figure 3 A perspective view of the jaw assembly.

[0039] Figure 5 One or more aspects of this disclosure are shown. Figure 3 A plan view of the fixture.

[0040] Figure 6 The passage shown is based on one or more aspects of this disclosure. Figure 5 A partial sectional view of the fixture taken from line 112-112.

[0041] Figure 7a An exploded view of a jaw assembly according to one or more aspects of this disclosure is shown.

[0042] Figure 7b Another exploded view of the jaw assembly according to one or more aspects of this disclosure is shown.

[0043] Figure 8 A clamp assembly is shown that holds an element of a first size in a first channel, according to one or more aspects of this disclosure.

[0044] Figure 9 A clamp assembly for holding a second-sized element in a second channel is shown, according to one or more aspects of this disclosure.

[0045] Figure 10 A perspective view of a clamp according to one or more aspects of the present disclosure is shown, the clamp being configured to have a jaw assembly of a second embodiment, wherein the jaws slide relative to each other.

[0046] Figure 11 A cross-sectional view of a jaw assembly according to one or more aspects of this disclosure is shown.

[0047] Figure 12 A clamping jaw assembly according to one or more aspects of this disclosure is shown as a second embodiment of clamping a first element in a first channel.

[0048] Figure 13 A clamping jaw assembly according to one or more aspects of this disclosure is shown as a second embodiment of clamping a second element, different in size from the first element, in a second channel.

[0049] Figure 14 A clamp according to one or more aspects of the present disclosure is shown, the clamp consisting of a jaw assembly of a third embodiment, wherein the jaw assembly is configured to be inclined relative to an axis.

[0050] Figure 15 A clamp, as shown in a side view, according to one or more aspects of this disclosure, is shown, the clamp having a jaw assembly according to a third embodiment.

[0051] Figure 16 The passage shown is based on one or more aspects of this disclosure. Figure 15The cross-sectional view taken from line 312-312 shows the mating between the inner jaws and the saddle.

[0052] Figure 17 This illustrates one or more aspects perpendicular to this disclosure. Figure 16 The view shown is a cross-sectional view.

[0053] Figure 18 A fourth embodiment of the invention according to one or more aspects of this disclosure is shown, wherein the inner jaws are mated with another device via a ball joint.

[0054] Figure 19 A cross-sectional view of a fourth embodiment according to one or more aspects of this disclosure is shown, illustrating the internal claw ball and internal claw socket configuration.

[0055] Figure 20 A fifth embodiment of a clamp according to one or more aspects of this disclosure is shown, which incorporates a rotary element that allows the jaw assembly to tilt relative to an axis.

[0056] Figure 21 A clamp according to one or more aspects of this disclosure is shown from a second angle.

[0057] Figure 22 A clamp according to one or more aspects of this disclosure is shown, wherein the jaw assembly is tilted relative to an axis.

[0058] Figure 23 A cross-sectional view of a clamp according to one or more aspects of this disclosure is shown.

[0059] Figure 24 A second cross-sectional view of a clamp according to one or more aspects of the present disclosure is shown.

[0060] Figure 25 A third cross-sectional view of a clamp according to one or more aspects of the present disclosure is shown, wherein the jaw assembly is inclined relative to the axis.

[0061] Figure 26a , Figure 26b , Figure 26c and Figure 26d This is a graph showing the clamping force of the clamp according to this disclosure compared to the conventional clamps in Figures 1a and 1b. Detailed Implementation

[0062] To facilitate an understanding of the principles of this disclosure, reference will now be made to embodiments illustrated in the accompanying drawings, and these embodiments will be described using specific language. However, it will be understood that this is not intended to limit the scope of this disclosure. Any changes and further modifications to the described apparatus, instruments, and methods, as well as any further applications of the principles of this disclosure, are fully contemplated, as will generally be apparent to those skilled in the art to which this disclosure pertains. In particular, it is fully contemplated that features, components, and / or steps described with respect to one embodiment may be combined with features, components, and / or steps described with respect to other embodiments of this disclosure.

[0063] Figure 2 An external fixation frame 1 of a certain type is shown. This frame can be held together with several clamps 2, 2a, 2b, 2c, 2d, 2e. Each clamp holds two fixation elements together. In an exemplary embodiment, they hold rods 3, 3a, 3b and bone pins 4, 4a, 4b, 4c. The bone pins are fixed to bone 5. The rods and bone pins are significantly different in size. Here, the different dimensions are represented by the cross-sectional width, which can be the diameter. The dimensions can vary, and in some embodiments, the rod size can be twice or more the size of the pin. However, in some embodiments, the rod size may be less than twice the size of the pin. In this depiction, all the clamps are of the same style and design. The clamps incorporate the jaw assembly of the present invention, such that the clamps can effectively clamp one rod to another or clamp a rod to a pin. Different configurations of clamp 2 are discussed below, and other types of clamps are envisioned.

[0064] Figure 3 This is a perspective view of an external clamping assembly 100 according to one or more aspects of this disclosure, which is configured as a jaw assembly 101 having an exemplary embodiment. The jaw assembly 101 includes an outer jaw 106, a spacer 107, and an inner jaw 108. Here, the clamping assembly 100 may incorporate a second, similar jaw assembly 102; however, depending on the implementation and embodiment, other jaw assemblies or other external clamping devices may replace or supplement the jaw assembly 102 to be mated to the first jaw assembly. To apply clamping force to the jaw assembly 101, a threaded shaft 103 (also referred to herein as a fastener) and a nut 104 act on another jaw assembly 102 and a washer 105. The washer 105 may be seated on the outside of the outer jaw 106 of the jaw assembly 101. In some examples, the outer jaw 106 may rest against the spacer 107, which may rest against the inner jaw 108. In this exemplary embodiment, Figure 3 The second jaw assembly 102 includes a similar washer 105a, outer jaw 106a, spacer 107a, and inner jaw 108a. In some embodiments, and as shown in the figure... Figure 3As shown, the inner jaws 108, 108a may have anti-rotation serrations 109, which are seated in similar serrations 109a on an opposing component, in this example, the opposing component being the inner jaws 108a of the jaw assembly 102. Other anti-rotation features are contemplated, which may include those relying solely on friction. A threaded shaft or fastener may define an axis coaxial with the threaded shaft, which may also define the axis of the clamping assembly 100.

[0065] exist Figure 3 In some embodiments described herein, and in other embodiments throughout this disclosure, the threaded shaft 103 (or fastener) and nut 104 may form a clamping mechanism arranged to maintain axial alignment of the outer and inner jaws.

[0066] Furthermore, despite Figure 3 A first jaw assembly 101 and a second jaw assembly 102 are shown, but the second jaw assembly 102 may also be referred to as a reference component. Although shown as a jaw assembly, the reference component may be a different component, such as a stabilizer, a multi-pin clamp, or other components that can be used as a reference when the first jaw assembly 101 is rotated, pivoted, or otherwise displaced to manipulate the fixed element.

[0067] Figure 4 A perspective view shows a jaw assembly 101 according to one or more aspects of this disclosure. The outer jaws 106 of the jaw assembly 101 may incorporate a seat 114 for a washer and a bore 115 through which a shaft 103 can pass. Depending on the embodiment, the seat may taper at an angle, may be cup-shaped, or may have some other shape.

[0068] Figure 5 The side view shows one or more aspects of this disclosure. Figure 3 The clamp. Spring 111 is visible in this view; in some embodiments, this spring can bias and selectively hold the jaw assemblies apart. A spring is a biasing feature that makes it easier for the clamp to snap onto the fixing element and holds it in place before tightening, but the device may not require a spring to function. Tightening nut 104 presses jaw assemblies 101, 102 against the head of shaft 103. Lines 112-112 are drawn to substantially show the center of the shaft.

[0069] Figure 6 It is a passage according to one or more aspects of this disclosure Figure 5 A cross-sectional view taken along line 112-112. In some embodiments, the cross-sectional view shows that the outer jaws 106 may have a first groove 121 and a second groove 122. The first groove 121 and the second groove 122 are in... Figure 6The inner jaws are the same size, but they can have different dimensions, including having grooves only on one of the jaws. In this embodiment, they are shown as completely opposite to each other, but in other embodiments they may be partially offset. Similarly, the inner jaws 108 may have a third groove 123 and a fourth groove 124. When the jaw assembly 101 is assembled, the first groove 121 and the third groove 123 can combine to form a first channel 125 for clamping a retaining element, and the second groove 122 and the fourth groove 124 can combine to form a second channel 126 for clamping retaining elements of different sizes.

[0070] Figure 7a and Figure 7b An exploded view of the jaw assembly 101 according to one or more aspects of this disclosure is shown from two different angles. In some embodiments, the inner jaw 108 shows a track 133 having a support surface 134. The spacer 107 may have a support surface 132 that contacts the inner jaw 106 on the mating support surface 134. The spacer may also have support surfaces 137 and 138 on its opposite sides. In some embodiments, the outer jaw 106 shows a track 135 having a support surface 136. The outer jaw support surface 136 may contact the spacer support surfaces 137 and 138. In exemplary embodiments, since each of the outer jaw 106, spacer 107, and inner jaw 108 is symmetrical, each has additional symmetrically matched support surfaces 132a, 137a, 138a and 134a, 136a (not shown). In various embodiments, on the spacer 107 and between the support surfaces 137 and 138, there exists Figure 7a The notch 139 is shown. In an exemplary embodiment, support surfaces 137 and 138 are coplanar surfaces, but other arrangements are contemplated. Edge 131 is shown at the outer edge of support surface 137. Edge 141 may be located on the other side of spacer 107 and at the outer edge of support surface 138. Similarly, edges 131a and 141a may be located at the outer edges of surfaces 137a and 138a.

[0071] The outer jaw 106 and the inner jaw 108 each include two component receiving ends, which are opposite each other in this embodiment. Here, the outer jaw 106 includes a first component receiving end 150 and a second component receiving end 151. The inner jaw 108 also includes a first component receiving end 152 and a second component receiving end 153. Each of the component receiving ends 150, 151, 152, and 153 is shaped to engage a fixing element, such as a rod or pin introduced into the jaw assembly formed by the outer and inner jaws. In the illustrated embodiment, the first component receiving end 150 of the outer jaw 106 and the first component receiving end 152 of the inner jaw 108 are shaped to engage a fixing element of a first size, and the second component receiving end 150 of the outer jaw 106 and the second component receiving end 152 of the inner jaw 108 are shaped to engage a fixing element of a second size. In the illustrated embodiment, the first element receiving end 150 of the outer jaw 106 and the first element receiving end 152 of the inner jaw 108 cooperate to define the channel 125. Similarly, the second element receiving end 151 of the outer jaw 106 and the second element receiving end 154 of the inner jaw 108 cooperate to define the channel 126.

[0072] Figure 8 A jaw assembly 101 in a first position is shown, wherein a sliding spacer 107 contacts at least one of the inner jaw 108 and the outer jaw 106 at a first point away from the fixing element and away from the fastener or threaded shaft 103. Here, the fixing element 130 may be located in a first channel 125 of the jaw assembly 101. In this embodiment, the element 130 may be a fixing rod, the size or diameter of which is larger than the size or diameter of the fixing pin. In an exemplary embodiment, the spacer 107 moves away from the first channel 125, and the outer jaw 106 contacts the spacer 107 at a contact point located on the outermost outer edge 131, 131a of the spacer 107, the contact point corresponding to... Figure 8 Reference numeral 131 in the attached figure. Corresponding to Figure 8 The contact point of reference numeral 131 in the figure can act as a fulcrum to pivot or rotate the outer jaws to increase or decrease the width of channel 125. Although shown as a contact point with the outer jaw 106, other embodiments utilize a contact point or contact fulcrum with the inner jaws, while other embodiments utilize contact points or contact fulcrums on both the inner jaw 108 and the outer jaw 106. Because the spacer can be displaced away from element 130, the edge in contact can be positioned away from axis 103. Figure 8 In the configuration shown, spacer 107 also prevents the introduction of an element into the second channel 126. This is possible because the sliding spacer 107 intersects with the first channel 126 and mechanically interferes with or prevents the introduction of an element into the second channel. Notably, some embodiments of spacer 107 include recessed or recessed portions that can engage or abut against the outer surface shape of the fixing element 130.

[0073] Figure 9 A jaw assembly 101 in a second position is shown, wherein a sliding spacer 107 contacts at least one of the inner jaw 108 and the outer jaw 106 at a second point away from the fixing element and away from the fastener or threaded shaft 103. Here, the fixing element 140 may be located in the second channel 126 of the jaw assembly 101. In this embodiment, the element 140 may be a fixing pin, the size or diameter of which is smaller than the size or diameter of the fixing rod. In an exemplary embodiment, the spacer 107 moves to the other end of the jaw assembly, and the outer jaw 106 contacts the spacer 107 at a contact point located on the other outer edge 141, 141a of the spacer furthest from the second element 140, the contact point corresponding to... Figure 9 Reference numeral 141 in the attached figure. Corresponds to Figure 9 The contact point of reference numeral 141 in the accompanying drawings can act as a fulcrum to pivot or rotate the outer jaws, thereby increasing or decreasing the width of the channel 126. Although shown as a contact point with the outer jaws 106, other embodiments utilize contact points or contact fulcrums with the inner jaws, while other embodiments utilize contact points or contact fulcrums on both the inner jaws 108 and the outer jaws 106. Moreover, in Figure 9 In the configuration shown, the positioning spacer 107 prevents any element from being introduced into the first channel 125. This is possible because the sliding spacer 107 intersects with the first channel 125 and mechanically interferes with or prevents the introduction of an element into the first channel 125.

[0074] Figure 9 The spacer 107 operates in a manner different from known latches (such as those described in U.S. Patent 9,138,260). Known latches are provided to temporarily lock the outer and inner jaws to prevent them from opening and allow removal of the retaining element. Known latches slide into alternative positions depending on the size of the retaining element being clamped, but the retaining element is always clamped by the first end of the jaw assembly, and the latch always contacts the second end of the jaw assembly. In contrast, the sliding spacer 107 described herein is configured to contact the second end of the jaw assembly when the first end holds the retaining element and to contact the first end when the second end holds the retaining element. Figure 8 and Figure 9 As can be seen, the outer jaw 106 is configured to be tilted relative to the inner jaw 108 to allow the retaining elements 130, 140 to enter between the outer jaw 106 and the inner jaw 108.

[0075] Figure 10This is a perspective view of an external clamping assembly 200 according to one or more aspects of this disclosure, which is configured as a jaw assembly 201 having an alternative embodiment. Some features are similar or identical to those described with reference to other embodiments and will not be repeated herein. The clamp may incorporate a second similar jaw assembly 202, but other jaw assemblies or other external clamping devices may be paired with the first jaw assembly, as described above with reference to clamping assembly 100. To apply clamping force to the jaw assembly, a threaded shaft 203 and a nut 204 act on another jaw assembly 202 or alternative clamping device instead of the jaw assembly 202. In some embodiments, the outer jaw 206 rests against a spacer 207, which rests against an inner jaw 208.

[0076] Figure 10 The second device in the alternative embodiment is also a jaw assembly, thus having a similar outer jaw 206a, spacer 207a, and inner jaw 208a. The inner jaw may have anti-rotation serrations 209, which are seated in similar serrations 209a on another device 202, although other anti-rotation features are envisioned, including those relying solely on friction.

[0077] Figure 11 This is a cross-sectional view of the device according to one or more aspects of this disclosure, passing through the axis of the shaft and perpendicular to the axis of any fixing element. Visible in this view is a biasing member shown as spring 211, which can bias or selectively hold the jaw assembly apart. A spring is a biasing feature that makes it easier for the clamp to engage with the fixing element and holds it in place before tightening, but the device may not require a spring to function. Other biasing elements are contemplated to be added to the device, including biasing elements that return the spacer 207 or the outer jaw 206 to an intermediate position relative to the inner jaw 208. Figure 11 This illustrates how the tightening nut 204 can press the jaw assemblies 201, 202 against the head of the shaft 203. Figure 11 As shown, in some embodiments, the outer jaw 206 may have a first groove 221 and a second groove 222. Similarly, the inner jaw 208 may have a third groove 223 and a fourth groove 224. When the jaw assembly 201 is assembled, the first groove 221 and the third groove 223 may combine to form a first channel 225 for clamping a fixing element, and the second groove 222 and the fourth groove 224 may combine to form a second channel 226 for clamping fixing elements of different sizes.

[0078] Figure 12A retaining element 230 located in a first channel 225 of a jaw assembly is shown, according to one or more aspects of this disclosure. In an exemplary embodiment, to insert the retaining element 230 into the channel 225, the outer jaw 206 and the spacer 207 are moved laterally relative to the inner jaw 208 and the shaft 203. In another exemplary embodiment, to retain the retaining element 230 in the channel 225, the outer jaw 206 is moved rearward to the appropriate position to form the channel 225. It is contemplated that, in various embodiments, a biasing element can be used to return the outer jaw 206 to the appropriate position, however... Figure 12 The embodiment shown (which is a non-limiting embodiment) is configured such that the step is performed by a user. In an exemplary embodiment, the spacer 207 is held in a position away from the first channel, and the outer jaws 206 contact the spacer 207 at its outermost edge 231 furthest from the element 230. Because the spacer is displaced away from the element, the edge in contact is positioned away from the axis 203. Figure 12 In the configuration shown, the spacer also prevents elements from being introduced into the second channel.

[0079] Figure 13 A second retaining element 240 is shown located in a second channel 226 of a jaw assembly 201 according to one or more aspects of this disclosure. In an exemplary embodiment, to introduce the element 240 into the channel 226, the outer jaw 206 and the spacer 207 are moved laterally relative to the inner jaw 208 and the shaft 203. In another exemplary embodiment, to retain the retaining element 240 in the channel 226, the outer jaw 206 is moved rearward to a suitable position to form the channel 226. The spacer 207 is held in a position away from the second channel. In some embodiments, the outer jaw 206 contacts the spacer 207 on the other outer edge 241 of the spacer 207 furthest from the second element. Moreover, in Figure 13 In the configuration shown, the positioning spacer 207 is positioned so that no element can be introduced into the first channel.

[0080] Figure 14Alternative embodiments according to one or more aspects of this disclosure are shown. Some features are similar or identical to those described with reference to other embodiments and will not be repeated herein. In some embodiments, the clamp 300 may consist of jaw assemblies 301 and 302. Jaw assembly 301 may include outer jaws 306, spacers 307, and inner jaws 308, and may be configured similarly to the example embodiment including jaw assembly 101 discussed above. In alternative embodiments, jaw assembly 302 may consist of similar outer jaws 306a and spacers 307a, but in some embodiments, inner jaws 341 are configured to mate with saddle 342. Saddle 342 may incorporate serrations 343 that mate with serrations 309 on inner jaws 308. For clamping the two jaw assemblies 301, 302 together, a threaded shaft 303 and a nut 304 are present. Optional washers 305, 305a are shown in this embodiment. In some implementations, the saddle may be referred to as a connecting mechanism arranged to connect the two jaw assemblies 301, 302 together.

[0081] exist Figure 15 The image shows a side view of a clamp according to one or more aspects of this disclosure. Lines 312-312 are shown passing substantially along the center of the clamp. Visible in this view is a biasing member shown as spring 311, which in some embodiments may hold or selectively keep the jaw assemblies apart.

[0082] Figure 16 This is a cross-sectional view of the clamp taken through line 312-312 according to one or more aspects of this disclosure. In some embodiments, the inner jaw 341 may have a convex lower surface 345 that engages against the saddle 342. The opening 344 in the inner jaw 341 may be configured such that the jaw assembly can tilt relative to an axis. The saddle 342 may include a relatively flat surface on a first side and a partially cylindrical recess or concavity on the opposite side. As discussed above, this allows the jaw assembly 302 to pivot or tilt. The opening 344 may be formed as: a wider opening facing the opposite jaw assembly 301; and a narrower opening adjacent to the spacer 307a and the outer jaw 306a. The saddle 342 may be mated with the inner jaw in a manner that allows the inner jaw, outer jaw, and sliding spacer to roll about an angle transverse to both the axis of the fixing element carried by the inner and outer jaws and the axis of the fastener.

[0083] Figure 17 This illustrates one or more aspects of the present disclosure in a direction perpendicular to... Figure 16 The same fixture in the section of the view. Figure 17In the diagram, the inner jaw 341 is shown in a cross-section through the profile. In various embodiments, the saddle 342 may have a recess with sidewalls 346 that maintain relative rotation about an axis between the inner jaw and the saddle while allowing the jaw assembly to tilt. The inner jaw may also have a first groove 353 and a second groove 354. The outer jaw 306a may have a first groove 351 and a second groove 352. In an exemplary embodiment, the first grooves 351 and 353 together form a first channel 355, and the second grooves 352 and 354 form a second channel 356.

[0084] In an exemplary embodiment, clamp 300 shows an embodiment of jaw assembly 302 coupled to jaw assembly 301 of another embodiment. It is contemplated that jaw assembly 302 may be coupled to another device (such as, for example, a multi-pin clamp or telescopic tube) to form an external fixing frame of different configurations.

[0085] Figure 18 Another clamp 400 according to one or more aspects of this disclosure is shown. Some features are similar to or the same as those described with reference to other embodiments and will not be repeated herein. In some embodiments, the clamp 400 consists of a jaw assembly 401 of one embodiment mating to a jaw assembly 402 of another embodiment. Both jaw assemblies may have washers 405, 405a, outer jaws 406, 406a, and spacers 407, 407a. In an exemplary embodiment, a first inner jaw 408 and a second inner jaw 409 may be mated together at a ball joint.

[0086] Figure 19 A cross-sectional view of a clamp 400 according to one or more aspects of this disclosure is shown. In various embodiments, the jaw assembly 401 may have a stud 414 screwed into an inner jaw 408. In an exemplary embodiment, the jaw assembly 401 is locked when the nut 404 is tightened, but the ball joint remains free to move if the other jaw assembly 402 remains unlocked. In some embodiments, the inner jaw 409 may have a recess 410 that mates against a ball 411 on the inner jaw 408. A threaded shaft 412 may have a ball 413 that rests in the ball 411 of the inner jaw 408. The shaft 412 passes through the inner jaw 409, the spacer 407a, and the outer jaw 406a. In an exemplary embodiment, when the nut 404a is loosened, the inner jaw 408 and the outer jaw are configured to pitch, roll, and yaw relative to the device including the ball 413. In an exemplary embodiment, when the nut 404a is tightened, the jaw assembly 402 locks, and the ball joint also locks.

[0087] Figure 19The outer jaw 406 is shown to have a first groove 421 and a second groove 422. Similarly, the inner jaw 408 may have a third groove 423 and a fourth groove 424. In some embodiments, when the jaw assembly 401 is assembled, the first groove 421 and the third groove 423 may combine to form a first channel 425 for clamping a fixing element, and the second groove 422 and the fourth groove 424 may combine to form a second channel 426 for clamping fixing elements of different sizes. Figure 19 A similar arrangement of the jaw assembly 402 is shown. The outer jaw 406a may have a first groove 421a and a second groove 422a. Similarly, the inner jaw 409 may have a third groove 427 and a fourth groove 428. In various embodiments, when the jaw assembly 402 is assembled, the first groove 421a and the third groove 427 may combine to form a first channel 429 for clamping a fixing element, and the second groove 422a and the fourth groove 428 may combine to form a second channel 430 for clamping fixing elements of different sizes.

[0088] In an exemplary embodiment, clamp 400 illustrates a jaw assembly 401 in one embodiment and a jaw assembly 402 in another embodiment. It is contemplated to connect jaw assembly 401 to different devices (such as, for example, telescopic tubes or multi-pin clamps) as part of an external fixing frame with different arrangements. It is also contemplated to connect jaw assembly 402 to different devices as part of an external fixing frame with different arrangements.

[0089] Figure 20 Another clamp 500 according to one or more aspects of this disclosure is shown. Some features are similar or identical to those described with reference to other embodiments and will not be repeated herein. In some embodiments, the clamp 500 comprises a jaw assembly 501 of one embodiment mating to a jaw assembly 502 of another embodiment. The first jaw assembly 501 has an outer jaw 506, a spacer 507, and an inner jaw 541. The inner jaw 541 mats with a rotating member 542. The second jaw assembly 502 has an outer jaw 509 and an inner jaw 508. The inner jaw 508 mats with a second rotating member 545. In an exemplary embodiment, the first rotating member 542 and the second rotating member 545 are mated together, and the two jaw assemblies are clamped together by fasteners 503, nuts 504, and washers 505. In some embodiments, the first rotating member 542 and the second rotating member 545 may be referred to as a coupling mechanism arranged to connect the two jaw assemblies together. Other complete mechanisms are contemplated, including other coupling mechanisms described herein.

[0090] Figure 21 This shows the relationship from another perspective. Figure 20The same clamps. In this figure, both jaw assemblies 501 and 502 are in the neutral position. In this position, any fixing element inserted into either jaw assembly will be positioned perpendicular to the fastener 503.

[0091] Figure 22 From and Figure 21 The same angle shows the same Figure 21 The same clamp. In this figure, jaw assemblies 501 and 502 are shown in a rotatable position. This allows any retaining element inserted into either jaw assembly to be in a position not perpendicular to fastener 503.

[0092] Figure 23 A cross-sectional view of a clamp 500 according to one or more aspects of this disclosure is shown. The cross-sectional view is through... Figure 21 The line was cut from 561. Figure 23 In the middle, the outer jaw 506 has a first groove 521 and a second groove 522. Similarly, the inner jaw 541 may have a third groove 523 and a fourth groove 524. In some embodiments, when the jaw assembly 501 is assembled, the first groove 521 and the third groove 523 may be combined to form a first channel 525 to clamp a fixing element, and the second groove 522 and the fourth groove 524 may be combined to form a second channel 526 to clamp fixing elements of different sizes. Figure 23 A similar arrangement of jaw assembly 502 is also shown. The outer jaw 509 may have a first groove 527. Similarly, the inner jaw 508 may have a third groove 528. In various embodiments, when jaw assembly 502 is assembled, the first groove 527 and the third groove 528 may combine to form a first channel 529 for clamping and securing the element. Jaw assemblies 501, 502 are configured to mate with a rotating element. In jaw assembly 501, the inner jaw 541 has a concave surface 510 that mates with the convex surface 511 of the rotating element. Similarly, in jaw assembly 502, the inner jaw 508 has a concave surface that mates with the convex surfaces 551, 551a of the rotating element, the concave surface being formed by straight lines 550, 550a.

[0093] The concave surface of the inner jaws and the convex surface of the rotating component are configured to allow the jaw assembly to pivot about a transverse axis perpendicular to the longitudinal axis established by the clamping fastener and perpendicular to the axis of the fixing element. In this embodiment, the center of rotation of the jaw assembly is located on the rotating component side of the interface between the inner jaws and the rotating component. This differs from the hinges shown in conventional clamps known in clamp 300 or U.S. Patent 9,138,260, where the jaw assembly rotates on the saddle about an axis on the jaw assembly side of the saddle / inner jaw interface.

[0094] Figure 24 It was cut from line 562. Figure 23 A cross-sectional view of the clamp. The jaw assembly is shown positioned with... Figure 21 In the same neutral orientation, the rotating member 542 may have a convex surface (with radius 513) that pairs with the concave surface (with radius 512) of the inner jaw 541. The radius of the convex radius 513 is greater than that of the convex radius 511. By sweeping radius 511 along radius 513, the convex surface of the rotating member 542 is toroidal. The radius of the concave radius 512 is greater than that of the concave radius 510. By sweeping radius 510 along radius 512, the concave surface of the inner jaw 541 is toroidal. The inner jaw 541 pairs with and remains oriented with the rotating member 542 because the toroidal shapes are similar, thus aligning the axes of each toroidal surface. The two inner jaw radii 510, 512 may also be the same, such that the concave surface of the inner jaw is spherical. The two rotating members radii 511, 513 may also be the same, such that the convex surface of the rotating member is spherical. In some aspects, this surface is formed by a cone, such as two cones.

[0095] exist Figure 24 In the design, the inner jaws 508 exhibit a concave surface 552, while the rotating member 545 exhibits an outer surface 553. In the inner jaws 508, straight lines 550, 550a sweep along a curve, thereby forming a concave surface 552 with conical sides. On the rotating member 545, straight lines 551, 551a sweep along a curve, thereby forming a convex surface 553 with conical sides. The inner jaws 508 mate against the rotating member 545 on the conical surface. The conical surface maintains alignment of the inner jaws to the rotating member while allowing the jaw assembly to hinge around the rotating member.

[0096] Figure 25 From and Figure 24 The same orientation is shown in the cross-sectional view of the clamp 500, but the jaw assemblies 501, 502 are inclined relative to the fastener. Inclination of the jaw assembly 501 is permitted because the slot 544 is larger than the shaft. In this embodiment, the slot 544 is larger than its axis when along the desired inclination direction. Figure 23 The vertical direction is as seen. A similar slot 544a is incorporated into the jaw assembly 502.

[0097] Nut 504 is tightened onto shaft 503, which brings together jaw assemblies 501, 502 and rotating parts 542, 545. Serrations 543, 543a on rotating parts 542, 545 can be incorporated to increase the locking strength of the rotating parts, thereby rotating the interface by relying on pure friction. Jaw assemblies 501, 502 are clamped between rotating parts 542, 545 and washer 505 or between the head of nut 504 and fastener 503, thereby rotationally locking them when clamped onto the fixing element. In the illustrated embodiment, a single washer 505 is placed between nut 504 and outer jaw 509. This washer is designed to promote a smoother feel when tightening the nut and to minimize marking on the outer jaw. The washer can be removed to reduce the number of parts. Washer 505 may have a concave surface 515 on the side opposite to the nut to increase the contact area with the outer surface 514 of the outer jaws 509. A washer with a concave surface may be used between the head of shaft 503 and the outer jaws 506 to increase the contact area. Increasing the contact area provides a smoother unlocking hinge and reduces scratching between components, but it is not necessary for the high locking strength of the hinge feature or general functionality.

[0098] In an exemplary embodiment, clamp 500 illustrates a jaw assembly 501 of one embodiment and a jaw assembly 502 of another embodiment. Embodiments are contemplated in which jaw assembly 501 is coupled to another jaw assembly 501. Jaw assembly 501 is contemplated to be coupled to different devices (such as, for example, telescopic tubes or multi-pin clamps) as part of an external fixing frame with different arrangements. Jaw assembly 502 is also contemplated to be coupled to different devices (such as, for example, jaw assembly 101, telescopic tubes, or multi-pin clamps) as part of an external fixing frame with different arrangements.

[0099] The dimensions of the clamping fixture described herein can be designed and the clamping fixture can be formed to allow clamping onto clamping elements of various sizes. In some embodiments, the first ends of the inner and outer jaws are sized and formed to hold clamping elements with diameters between 10 and 13 mm, and the second ends of the inner and outer jaws are configured to hold clamping elements with diameters between 3 and 6.5 mm. In some embodiments, the first ends of the jaws are configured to hold clamping elements with diameters between 6 and 9 mm, and the second ends of the jaws are configured to hold clamping elements with diameters between 3 and 5 mm. In yet other embodiments, the first ends of the jaws are configured to hold clamping elements with diameters between 4 and 6 mm, and the second ends of the jaws are configured to hold clamping elements with diameters between 2 and 4 mm. And in yet other embodiments, the first ends of the jaws are configured to hold clamping elements with diameters of 11 mm, and the second ends of the jaws are configured to hold clamping elements with diameters of 5 mm. These values ​​are for illustrative purposes only, and other dimensions are contemplated.

[0100] To verify the performance improvement provided by the slider, a clamping strength test of the fixing element was conducted. This test involved using a clamp according to the prior art shown in Figures 1a and 1b, and... Figure 3 The clamps were compared. Both the prior art clamp and the clamp of the preferred embodiment are made of titanium alloy. The clamping strength of the clamps was compared when clamping a carbon fiber rod with a diameter of 11 mm and when clamping a stainless steel pin with a diameter of 5 mm. Axial clamping test tested the strength of the clamp in holding the rod or pin to prevent slippage along its longitudinal direction. Torsional clamping test tested the resistance of the clamp to prevent rotation of the cylindrical element. The clamps were all tightened to the same torque of 10 N-m. Figure 26 shows the relative results of the different tests. For all tests, the difference in clamping strength was significant, with a large difference shown in pin clamping.

[0101] In all the preceding descriptions, the elements have been shown as cylinders. Other external fixing elements (such as rings, square bars, rectangular bars, and hexagonal bars) can all be used as frame components. It is envisioned that the jaw assembly can be configured to clamp any of the other frame component shapes of these shapes and similar objects.

[0102] Those skilled in the art will understand that the embodiments covered by this disclosure are not limited to the specific exemplary embodiments described above. In this regard, although illustrative embodiments have been shown and described, a wide range of modifications, alterations, and substitutions are contemplated in the foregoing disclosure. It should be understood that such changes may be made to the foregoing without departing from the scope of this disclosure. Therefore, it is appropriate that the appended claims be interpreted broadly and in a manner consistent with this disclosure.

Claims

1. A jaw assembly of an external fixing clamp, the jaw assembly being configured to clamp and fix an element, the jaw assembly comprising: The outer jaws have a first end and a second end; The inner jaw has a first end and a second end, the first end of the inner jaw and the first end of the outer jaw are configured to cooperate to form a first channel, the first channel is sized to hold a first fixing element having a first size, and the inner jaw has a concave surface opposite to the outer jaw. A fastener configured to clamp the inner jaws and the outer jaws to at least one fixing element, the fastener having a fastener axis, and A rotating component having a convex surface shaped to mate with the concave surface of the inner jaws; The inner jaw is configured to mate with the rotating component and allow the inner jaw and the outer jaw to roll about an axis that is transverse to both the axis of the fixing element and the axis of the fastener; Wherein, the second end of the inner jaw and the second end of the outer jaw are configured to cooperate to form a second channel, the second channel being sized to clamp a second fixing element having a second dimension, and the jaw assembly of the external fixing clamp includes: A sliding spacer, slidably associated with the inner and outer jaws to slide in a direction transverse to the axis of the fastener, The sliding spacer is structurally associated with the inner jaw and the outer jaw such that when the first fixing element is introduced into the first channel, the sliding spacer moves to a first position in which the sliding spacer contacts at least one of the inner jaw and the outer jaw at a first position away from the fastener, and when the second fixing element is introduced into the second channel, the sliding spacer moves to a second position in which the sliding spacer contacts at least one of the inner jaw and the outer jaw at a second position away from the fastener.

2. The jaw assembly according to claim 1, wherein, The rotating component is configured to lock the inner and outer jaws at an angle relative to the fastener while the fastener clamps the inner and outer jaws to at least one fixing element.

3. The jaw assembly according to claim 1, wherein, The convex surface of the rotating component is annular in shape.

4. The jaw assembly according to claim 1, wherein, The convex surface of the rotating component is cylindrical.

5. The jaw assembly according to claim 1, wherein, The convex surface of the rotating component is in the shape of two cones.

6. The jaw assembly according to claim 1, wherein, The convex surface of the rotating component is a partial spherical surface.

7. The jaw assembly according to claim 1, wherein, The rotating component has a serrated surface opposite the convex surface.

8. The jaw assembly according to claim 1, wherein, The outer jaws have a convex surface.

9. The jaw assembly according to claim 8, wherein, The convex surface of the outer jaws mates with the flat surface of the fastener.

10. The jaw assembly according to claim 8, wherein, The convex surface of the outer jaws mates with a washer inserted between the outer jaws and the fastener.

11. The jaw assembly according to claim 10, wherein, The washer incorporates a convex surface to contact the outer jaws.

12. An external fixing clamp, comprising: A jaw assembly comprising an outer jaw and an inner jaw, thereby forming a channel therebetween, the jaw assembly being configured to capture a rigid fixing element within the channel, the inner jaw having a cavity on a surface facing away from the outer jaw. A clamping mechanism arranged to maintain the axial alignment of the outer jaws and the inner jaws; Reference component, which is biased from the jaw assembly along the longitudinal axis; A connecting mechanism is arranged between the jaw assembly and the reference component, the connecting mechanism allowing the jaw assembly to rotate relative to the reference component about the longitudinal axis, the connecting mechanism including a convex surface that abuts against a cavity on the surface of the inner jaw facing away from the outer jaw, and the jaw assembly being pivotable on the connecting mechanism about a transverse axis perpendicular to the longitudinal axis; The jaw assembly is configured to capture a rigid element of a second size; The jaw assembly includes a sliding spacer that is cooperatively associated with the inner jaw and the outer jaw and arranged to slide in a direction transverse to the axis of the clamping mechanism. The sliding spacer is structurally associated with the jaws such that when a fixing element of a first size is introduced into the corresponding first end, the sliding spacer moves to a first position in which it contacts at least one of the inner jaw and the outer jaw at a first position away from the clamping mechanism, and when a fixing element of a second size is introduced into the second channel, the sliding spacer moves to a second position in which it contacts at least one of the inner jaw and the outer jaw at a second position away from the clamping mechanism.

13. The external fixing clamp according to claim 12, wherein, The clamping mechanism is a nut combined with a threaded stud.

14. The external fixing clamp according to claim 13, wherein, The nut includes a flat surface that hinges against the curved outer surface of the outer jaws, and the nut is rotatable to lock the hinge of the jaw assembly when tightened onto the stud.

15. The external clamping fixture of claim 14, comprising a washer between the curved outer surfaces of the nut and the external jaws.

16. The external fixing clamp according to claim 15, wherein, The washer includes a curved surface that engages with the curved outer surface of the outer jaws.

17. The external fixing clamp of claim 12, wherein the reference member comprises an external fixing clamp configured to retain a fixing element, comprising: The inner jaws have a first end shaped to engage a first-sized fixing element and a second end shaped to engage a second-sized fixing element. The outer jaws have a first end shaped to engage a fixing element of the first size and a second end shaped to engage a fixing element of the second size. A fastener configured to clamp the jaws to at least one of a first-sized fixing element and a second-sized fixing element, the fastener having an axis, and A sliding spacer, which is inserted between the jaws and arranged to slide in a direction transverse to the axis of the fastener, The sliding spacer is structurally associated with the jaws such that when a first-sized fixing element is introduced into the corresponding first end, the sliding spacer moves to a first position in which the sliding spacer contacts at least one of the jaws at a first point away from the fastener, and when a second-sized fixing element is introduced into the second end, the sliding spacer moves to a second position in which the sliding spacer contacts at least one of the jaws at a second point away from the fastener.

18. The external fixing clamp according to claim 17, wherein when a clamping force is applied, the clamping mechanism locks both the fixing element and the connecting mechanism.

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