The present invention relates generally to electrical connectors, and more specifically to electrical connectors configured to electrically couple at least one insulated electrical conductor to another electrically conductive surface.
Prior insulation displacement connectors (IDCs) may be found in a variety of configurations. One popular configuration is a blade or vampire tap configuration. In such configuration, insulated electrical conductors (e.g., wires), often required to be identical size or gauge, are placed in a connector housing. When the connector housing is closed, and usually locked, the electrical conductors are placed in electrical communication with each other, or with an electrical terminal connector plug or jack. Such electrical communication is achieved by one or more electrically conductive blades that slice through the insulation of the insulated conductor, usually at a single longitudinal location along the conductor, and physically contact the electrically conductive material of the conductor (e.g., one or more copper or other conductive strands of material).
One disadvantage of prior IDCs is a normal restriction on conductor size. That is, most prior devices cannot accommodate a large variation of size between the conductors to be coupled. Where a large deviation between conductor size is attempted, past IDCs have problems either displacing insulation adequately from all conductors and/or the IDC housings do not lock properly.
Another disadvantage of prior IDCs is a restriction on conductor types. Other connectors presume that, where two conductors are to be connected, for example, the conductors are not only the same size, as described above, but are of the same construction (e.g. solid conductor, stranded conductor, coiled conductor, coaxial, etc.). Thus, prior devices may be unable to accommodate a first conductor of one construction and a second conductor of a different construction, for example.
Still another disadvantage of IDCs is that they may not be suited for use in moist ambient environments. Many past IDC housings, even after being locked, thereby forming the desired electrical connection, remain penetrable by water and/or water vapor, usually through unsealed housing cracks or joints. While such housings may be substantially sufficient for applications where the connector will be kept in a dry environment or where a secondary housing is provided, it may not be useful in situations where electrical connection under water or for use in moist environments, such as a shower, steam room, etc.
Accordingly, the art of insulation displacement connectors would benefit from improved systems and methods of coupling electrical conductors that may solve one or more of the stated disadvantages, or may provide other advantages.
Embodiments of the present invention provide improved systems and methods of coupling electrical conductors.
An embodiment of a device for coupling electrical conductors according to the present invention includes a connector body having a plurality of body surfaces. Into the body and through at least one of the body surfaces, a first engagement aperture extends along a first engagement axis. A first coupling element is provided in moveable engagement at least partially within the first engagement aperture, and a first channel is formed into the connector body along a first channel axis, the first channel being adapted to receive a first insulated electrical conductor. The first channel at least partially intersects the first engagement aperture. The device preferably further includes a second engagement aperture extending along a second engagement axis into the connector body through at least one of the body surfaces. A second coupling element is provided in moveable engagement at least partially within the second engagement aperture, and a second channel is formed into the connector body along a second channel axis, the second channel being adapted to receive a second insulated electrical conductor. The second channel at least partially intersects the second engagement aperture. The device further includes an electrically conductive bridge member that at least partially intersects the first engagement aperture and the second engagement aperture, such that the first coupling element and the second coupling element may be electrically coupled together through the bridge member.
According to an aspect of an embodiment of the present invention, the first engagement aperture and the second engagement aperture may both be formed through the same body surface.
According to another aspect of an embodiment of the present invention, the first channel is formed along a first channel axis and the first channel axis is at least substantially parallel to the first engagement axis. Additionally or alternatively, the second channel may be formed along a second channel axis and the first channel axis may be at least substantially parallel to the second engagement axis. The first channel axis and the second channel axis may be at least substantially parallel.
According to still another aspect of an embodiment of the present invention, a bridge aperture may be formed into the connector body. The bridge aperture at least partially intersects the first and second engagement apertures, and the bridge member may be inserted into and disposed within the bridge aperture. Additionally or alternatively, the bridge member may be molded into the connector body.
According to still another aspect of an embodiment of the present invention, at least one of the first coupling element and the second coupling element may be moveable between a first position in electrical contact with the bridge member and a second position in electrical isolation from the bridge member.
According to a further aspect of an embodiment of the present invention, a first electrically insulative plug member may be inserted into the first engagement aperture. Additionally or alternatively, a second electrically insulative plug member may be inserted into the second engagement aperture. Preferably, if a plug member is provided for each engagement aperture, the first plug member is inserted into the first engagement aperture after the first coupling element is placed in electrical contact with the bridge member and the second plug member is inserted into the second engagement aperture after the second coupling element is placed in electrical contact with the bridge member.
According to another aspect of an embodiment of the present invention, the connector body is formed from an electrically insulative material.
According to still another aspect of an embodiment of the present invention, each coupling element comprises a substantially cylindrical stud. Each stud may be threadably engaged with the connector body in a respective engagement aperture.
According to yet another aspect of an embodiment of the present invention, the first channel may extend through two outer surfaces of the connector body. Additionally or alternatively, the second channel may extend through two outer surfaces of the connector body. If both the first and second channels extend through two outer surfaces of the connector body, the first channel and the second channel may extend through the same two outer surfaces of the connector body, or they may extend through two or more different surfaces.
According to an aspect of a method according to the present invention, the method includes the steps of providing a device, inserting first and second insulated electrical conductors into the device, moving first and second coupling elements, and as a result of the moving steps, placing the first and second insulated electrical conductors in electrical communication with each other. The device provided preferably includes a connector body having a plurality of body surfaces. Into the body and through at least one of the body surfaces, a first engagement aperture extends along a first engagement axis. A first coupling element is provided in moveable engagement at least partially within the first engagement aperture, and a first channel is formed into the connector body along a first channel axis, the first channel being adapted to receive a first insulated electrical conductor. The first channel at least partially intersects the first engagement aperture. The device preferably further includes a second engagement aperture extending along a second engagement axis into the connector body through at least one of the body surfaces. A second coupling element is provided in moveable engagement at least partially within the second engagement aperture, and a second channel is formed into the connector body along a second channel axis, the second channel being adapted to receive a second insulated electrical conductor. The second channel at least partially intersects the second engagement aperture. The device further includes an electrically conductive bridge member that at least partially intersects the first engagement aperture and the second engagement aperture, such that the first coupling element and the second coupling element may be electrically coupled together through the bridge member.
The first and/or second coupling elements may include a conductive stud having stud threads mateable with threads provided in a respective engagement aperture. The threads preferably protrude radially at least partially into at least one of the first channel and the second channel. In moving the conductive stud, a rotational force may be applied to an end of the stud thereby causing movement of the respective coupling element into electrical contact with the bridge member. As a result of the moving of a conductive stud, the threads of such stud preferably penetrate one or more insulation layers of an insulated electrical conductor.
Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structures. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
Turning now to the Figures, a first embodiment 100 of a coupling device or connector according to the present invention is shown in
While the connector body 110 may be formed of any desirable material that may be selected for a given use, the connector body 110 is preferably formed from an electrically insulative material, such as a thermoplastic material, which may be a USP Class VI medical grade plastic material. A preferred material may be selected from the Ultem® family of amorphous thermoplastic polyetherimide (PEI) available from Sabic Innovative Plastics Holding By, of Pittsville, Mass., and also of the Netherlands. A preferred material is Ultem 1000. Indeed, the connector body 110 may be machined from Ultem bar stock having a desired diameter, such as about 0.625 inches, which may cause the left surface 116 and right surface 118 to be generally convex along the body width 124.
Formed into the connector body 110 is at least one engagement aperture, bore or channel 128, formed along an engagement axis 130. The engagement aperture 128 is provided with an engagement means 132, such as threads 134, to cooperate with the coupling element 150. The engagement aperture 128 may be formed through the connector body 110, such as through the entire width 124, as shown. The threads 134 may be formed during casting of the body 110 or in a machining process after the body 110 has been cast or machined.
Also formed into the connector body 110 is at least one conductor aperture, bore or channel 136. In the embodiment shown, a first conductor channel 138 is formed into the front surface 112 of the connector body 110, the first conductor channel 138 being formed along a first conductor axis 139 which may be disposed at least substantially parallel to the engagement axis 130. The first conductor channel 138 is preferably a smooth reentrant bore, which is formed at a distance from or relation to the engagement aperture 128 so as to intersect the engagement aperture 128. As shown, the first conductor axis 139 is disposed substantially parallel to the engagement axis 130, and spaced therefrom by a distance that is less than the sum of the radius of each of the axes 130,139 such that the first conductor channel 138 overlaps the engagement aperture 128 longitudinally along a length thereof. A portion 138a of the first conductor channel 138 preferably extends through the connector body 110, and such arrangement may be desirable to provide for conductor length adjustment. The portion 138a may extend substantially obliquely to a tangent of threads 158 provided on the stud 152, as further described below.
In the first embodiment 100, a second conductor aperture, bore or channel 140 is formed along a second conductor axis 142. While the second conductor bore 140 may extend through the entire connector body 110, such as through the entire body length 126, the second conductor bore 140 is preferably a smooth reentrant bore, which at least partially intersects the engagement aperture 128. The second conductor axis 142 may be coplanar with the engagement axis 130, but is preferably obliquely skew to the engagement axis 130 at a desired angle 144. Thus, in the embodiment 100 shown, using the engagement axis 130 as a reference, the first conductor axis 139 is disposed substantially parallel to and below the engagement axis 130, while the second conductor axis 142 is disposed obliquely skew to and above the engagement axis 130. The angle 144 at which the second conductor bore 140 may be formed skew to the engagement axis 130 is preferably greater than 45 degrees and less than about 135 degrees, and is preferably about 90 degrees. However, as described in connection with later embodiments, the second conductor axis 142 may be disposed substantially parallel (about zero or about 180 degrees) to the engagement axis 130.
The coupling element 150 is preferably formed as a conductive stud 152 formed between a first end 152a and second end 152b along a stud axis 153 for a stud length 154. The stud length 154 is preferably less than a dimension of the connector body 110 that is parallel to the engagement axis 130. Indeed, when the coupling element 150 is operatively positioned to couple a plurality of conductors, the coupling element 150 is preferably situated completely within all perimeters of the connector body 110, so as to inhibit electrical conduction through the coupling element 150 through accidental outside contact. The stud 152 preferably has mating engagement means 156, such as threads 158, formed along at least a portion of the stud length 154, to cooperate with the engagement means 132 provided in the engagement aperture 128, such as at least a portion of the threads 134, provided in the engagement aperture 128. A preferred material for the stud 152 is stainless steel, copper, or any other conductive material. The first end 152 is preferably at least partially formed as a substantially planar surface disposed preferably orthogonally to the stud axis 153. The second end 152b is preferably provided with a tool engagement surface 155, which may include a female hexagonal socket 157, as shown, or other engagement surface.
To use the first embodiment 100 of a connector according to the present invention, a plurality of insulated conductors 900 are inserted into the connector 100, and electrically coupled by the coupling member 150. A first insulated conductor 902 may include a electrically conductive portion 904 circumferentially surrounded by an electrically insulative portion 906. The conductive portion 904 may be a solid conductor, such as a wire of suitable gauge, a plurality of conductors forming a straight stranded wire, or one or more coiled wires having an at-rest turns-per-inch count. Electrically coupled to the conductive portion 904 is an electrically conductive terminal 908, such as a stainless steel terminal that may be crimped onto the conductor 904 and/or the insulation 906. At an end opposite the terminal 908, the conductor 902 may be terminated with a custom or conventional electrical plug, socket, jack, etc., such as a conventional IS-1 connection. A second insulated conductor 912 may include a electrically conductive portion 914 circumferentially surrounded by an electrically insulative portion 916. The conductive portion 914 may be a solid conductor, such as a wire of suitable gauge, a plurality of conductors forming a straight stranded wire, or one or more coiled wires having an at-rest turns-per-inch count, and is preferably the latter. At an end of the second conductor 912 distal from the connector 100, the conductor 912 may terminate in a desired fashion, such as with a custom or conventional electrical plug, socket, jack, etc., or with a functional termination such as a stimulating electrode, and more preferably a stimulating electrode configured to be anchored in animal muscle tissue.
To use the connector 100, the first conductor 902 is inserted into the second conductor bore 140 such that the terminal 908 is disposed at least partially within the engagement aperture 128. Preferably, the terminal 908 abuts a closed end of the second conductor bore 140 to register the terminal 908 in a desirable position to help reduce guesswork as to positioning. The first conductor 902 may be secured to the connector body 110, such as with adhesive or sealant, or with a nonpenetrating set screw. Preferably, along at least a portion of the second conductor bore 140, void space that may exist between the insulator 906 and the bore 140 is filled with an electrically insulative substance, such as silicone. The process of disposing the first conductor 902 at least partially within the connector body 110 may be performed generally prior to product packaging, such as sterile product packaging, or such assembly may be performed by a user upon opening one or more sterile packages containing the first conductor 902 and the connector body 110. Preferably, though not necessarily, after the first conductor 902 is inserted and/or positioned, the second conductor 912 is preferably inserted into the first conductor channel 138 and at least partially into the engagement aperture 128. If the engagement aperture 128 extends entirely through the connector body 110, the second conductor 912 may be pulled through the body 110 to a desired length. Once the conductors 902,912 are at a desired position, the coupling member 150 is placed into electrical communication with both conductive portions 904,914. While the coupling member 150 may be completely removed from the body 110 to allow insertion of the second conductor 912, the coupling member 150 is preferably prepositioned at least partially within the engagement aperture 128 prior to the insertion of the second conductor 912. Such prepositioning may be done generally at the time of manufacture, and the member 150 may be held substantially rotationally stationary in the engagement aperture 128 by, for example, a drop of silicone. One way in which such electrical communication may be achieved is by the threads 158 cutting through the insulation 916 of the second conductor 912 and the first end 152a abutting the terminal 908 of the first conductor 902. The stud 152 may be advanced, such as with a standard L-shaped hex, or other wrench 950 (as shown in
As mentioned, the conductors 900 may be one or more coiled wires having an at-rest (unstretched) turns-per-inch count. The threads 158 on the coupling member 150 are preferably positioned at a thread pitch that approximates (preferably +/−10%) the at-rest turns-per-inch count of a (multi-)coiled conductor 900.
As mentioned, the stud 152 may be turned until a desired torque is reached. As shown in
Additionally or alternatively, the tool end of a wrench may be provided as being anchored to the stud 152, such as by being adhered thereto or formed integrally therewith. In such embodiment, the stress riser portion may be formed substantially at the second end 152b of the stud 152. An example of a combined stud and torque wrench, or wrench-stud 980 can be seen in
A third embodiment 300 of a connector according to the present invention is shown in
A fifth embodiment 500 of a connector according to the present invention is shown in
A first embodiment 1000 of a kit according to the present invention is shown in
Generally, the components of the kit 1000 are preferably disposed in the same package, bag or box. A preferred kit 1000 includes a segmented plastic tray 1002, wherein each compartment holds one or more components of the kit 1000. A perimeter of a top edge of the tray 1002 may be sealed by, for example, a plastic sheeting material 1004 that is adhered to or otherwise bonded to the tray 1002. The compartment formed by the package, bag or box of the kit, such as the one or more compartments formed by the tray 1002 and the plastic sheeting material 1004, may be and preferably are sterile.
The foregoing is considered as illustrative only of the principles of the invention. Furthermore, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
This application is a continuation of U.S. patent application Ser. No. 13/330,885, filed 20 Dec. 2011, which will issue as U.S. Pat. No. 8,231,402 on 31 Jul. 2012, entitled “Systems and Methods of Coupling Electrical Conductors,” which is a continuation of U.S. patent application Ser. No. 12/958,077, filed 1 Dec. 2010, now U.S. Pat. No. 8,079,865, entitled “Systems and Methods of Coupling Electrical Conductors.”
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Number | Date | Country | |
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20120291271 A1 | Nov 2012 | US |
Number | Date | Country | |
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Parent | 13330885 | Dec 2011 | US |
Child | 13562576 | US | |
Parent | 12958077 | Dec 2010 | US |
Child | 13330885 | US |