1. Field of the Disclosure
The disclosure relates generally to coaxial cable connectors, and particularly to a coaxial cable connector having a compressible.
2. Technical Background
Coaxial cable connectors such as F-connectors are used to attach coaxial cables to another object such as an appliance or junction having a terminal adapted to engage the connector. Coaxial cable F-connectors are often used to terminate a drop cable in a cable television system. The coaxial cable typically includes a center conductor surrounded by a dielectric, in turn surrounded by a conductive grounding foil and/or braid (hereinafter referred to as a conductive grounding sheath); the conductive grounding sheath is itself surrounded by a protective outer jacket. The F-connector is typically secured over the prepared end of the jacketed coaxial cable, allowing the end of the coaxial cable to be connected with a terminal block, such as by a threaded connection with a threaded terminal of a terminal block.
Crimp style F-connectors are known wherein a crimp sleeve is included as part of the connector body. A special radial crimping tool, having jaws that form a hexagon, is used to radially crimp the crimp sleeve around the outer jacket of the coaxial cable to secure such a crimp style F-connector over the prepared end of the coaxial cable.
Still another form of F-connector is known wherein an annular compression sleeve is used to secure the F-connector over the prepared end of the cable. Rather than crimping a crimp sleeve radially toward the jacket of the coaxial cable, these F-connectors employ a plastic annular compression sleeve that is initially attached to the F-connector, but which is detached therefrom prior to installation of the F-connector. The compression sleeve includes an inner bore for following such compression sleeve to be passed over the end of the coaxial cable prior to installation of the F-connector. The end of the coaxial cable must be prepared by removing a portion of the outer braid and/or folding the outer braid back over the cable jacket. The F-connector itself is then inserted over the prepared end of the coaxial cable. Next, the compression sleeve is compressed axially along the longitudinal axis of the connector into the body of the connector, simultaneously compressing the jacket of the coaxial cable between the compression sleeve and the tubular post of the connector. An example of such a compression sleeve F-connector is shown in U.S. Pat. No. 4,834,675 to Samchisen A number of commercial tool manufacturers provide compression tools for axially compressing the compression sleeve into such connectors.
Collars or sleeves within a coaxial cable connector can be compressed inwardly against the outer surface of a coaxial cable to secure a coaxial cable connector thereto. For example, in U.S. Pat. No. 4,575,274 to Hayward, a connector assembly for a signal transmission system is disclosed wherein a body portion threadedly engages a nut portion. The nut portion includes an internal bore in which a ferrule is disposed, the ferrule having an internal bore through which the outer conductor of a coaxial cable is passed. As the nut portion is threaded over the body portion, the ferrule is wedged inwardly to constrict the inner diameter of the ferrule, thereby tightening the ferrule about the outer surface of the cable. However, the connector shown in the Hayward '274 patent cannot be installed by a simple crimp or compression tool; rather, the mating threads of such connector must be tightened, as by using a pair of wrenches. Additionally, the end of the coaxial cable must be prepared by stripping back the outer jacket to expose the conductive grounding sheath and center conductor, then further requires that the conducting grounding sheath be folded back, or everted, all of which takes time, tools, and patience.
Embodiments disclosed herein include a coaxial connector for coupling an end of a coaxial cable to a terminal, the coaxial cable comprising an inner conductor, a dielectric surrounding the inner conductor, an outer conductor surrounding the dielectric, and a jacket surrounding the outer conductor. The coaxial cable connector includes a body having an internal surface extending between front and rear ends of the body, and defining a longitudinal opening. A retainer has an external surface and engages the body and rotatably engages the coupler. The retainer further has an internal surface in mechanical and electrical communication with a ferrule. The ferrule has an outer surface slidingly engaging at least a portion of the retainer and at least one portion of the body, and an inner surface to engage at least a portion of the cable outer conductor. In an alternate embodiment, the ferrule may engage at least a portion of the cable jacket. A shell has an outer surface and an internal surface, with the internal surface defining an opening through the shell. The internal surface slidingly engages at least a portion of the rear end of the body. A sealing ring is disposed within the shell and engages the rear end of the body. The sealing ring has an internal surface. Upon compression of the coaxial cable connector the sealing ring engages the jacket of the coaxial cable.
Alternatively, upon compression of the coaxial cable connector, the shell may push the sealing ring against the rear end of the body, causing the sealing ring to be compressed both axially and radially and a portion thereof to engage the outer jacket of the coaxial cable. The coaxial cable connector may include a coupling portion rotatably engaging the front end of the retainer. The coaxial cable connector may include a coupling portion rotatably engaging the front end of the body. The shell radially compresses the rear end of the coaxial cable connector body. The coaxial cable connector may be post-less.
In yet another aspect, embodiments disclosed herein include a method for connecting a coaxial cable to a coaxial cable connector. The method includes providing a coaxial cable connector comprising a body having an internal surface extending between front and rear ends of the body, the internal surface defining a longitudinal opening, a retainer having an external surface engaging the body and rotatably engaging a coupler, the retainer further having an internal surface in mechanical and electrical communication with a ferrule. The ferrule has an outer surface that slidingly engages at least a portion of the retainer and the body and has an inner surface to engage at least a portion of the cable outer conductor. Alternatively, the ferrule may engage at least a portion of the cable jacket, A shell has an outer surface and an internal surface. The internal surface defines an opening through the shell, and slidingly engages at least a portion of the rear end of the body. A sealing ring is disposed within the shell and engages the rear end of the body. The sealing ring has an internal surface. Upon compression of the coaxial cable connector, the sealing ring engages the jacket of the coaxial cable.
The method may also include providing a coaxial cable; the coaxial cable comprises an inner conductor, a dielectric surrounding the inner conductor, an outer conductor surrounding the dielectric, and a jacket surrounding the outer conductor; preparing the coaxial cable by exposing a predetermined length of the center conductor and a predetermined length of the outer conductor, the outer conductor covers the underlying dielectric; inserting the prepared coaxial cable through the shell and sealing ring and into the ferrule, wherein the dielectric and the outer conductor terminate at the front end of the ferrule; pushing the ferrule into the retainer thus forcing the ferrule to close about the cable outer conductor, the inner conductor extends beyond the coupling portion and the jacket terminates proximate the rear end of the body; axially compressing (with or without the use of a tool); the coaxial cable connector thereby causing the shell to push the sealing ring against the rear end of the body, causing the sealing ring to engage the outer jacket of the coaxial cable.
Additional features and advantages are set out in the detailed description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the embodiments as described herein, including the detailed description, the claims, as well as the appended drawings.
It is to be understood that both the foregoing general description and the following detailed description are merely exemplary, and are intended to provide an overview or framework to understanding the nature and character of the claims. The accompanying drawings are included to provide a further understanding, and are incorporated in and constitute a part of this specification. The drawings illustrate one or more embodiment(s), and together with the description serve to explain principles and operation of the various embodiments.
Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings, in which some, but not all embodiments are shown. Indeed, the concepts may be embodied in many different forms and should not be construed as limiting herein. Rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Whenever possible, like reference numbers will be used to refer to like components or parts.
Coaxial cable connectors are used to couple a prepared end of a coaxial cable to a threaded female equipment connection port of an appliance. The coaxial cable connector may have a post, a moveable post or be postless. In each case, though, in addition to providing an electrical and mechanical connection between the conductor of the coaxial connector and the conductor of the female equipment connection port, the coaxial cable connector provides a ground path from an outer conductor of the coaxial cable to the equipment connection port. The outer conductor may be, as examples, a conductive foil or a braided sheath. Maintaining a stable ground path protects against the ingress of undesired radio frequency (“RF”) signals which may degrade performance of the appliance. This is especially applicable when the coaxial cable connector is not fully tightened to the equipment connection port, either due to not being tightened upon initial installation or due to becoming loose after installation.
For purposes of this description, the term “forward” will be used to refer to a direction toward the portion of the coaxial cable connector that attaches to a terminal, such as an appliance equipment port. The term “rearward” will be used to refer to a direction that is toward the portion of the coaxial cable connector that receives the coaxial cable. The term “terminal” will be used to refer to any type of connection medium to which the coaxial cable connector may be coupled, as examples, an appliance equipment port, any other type of connection port, or an intermediate termination device.
Coaxial cable connector 100 is illustrated in
Coupling portion 200 has front end 220, back end 225, and opening 230 extending therebetween. Opening 230 of coupling portion 200 has internal surface 235. Internal surface 235 includes threaded portion 240 and channel 245, which is configured to receive elastic ring 250 to seal coaxial cable connector 100. Coupling portion 200 also has inwardly projecting ring 255 to engage rearward facing shoulder 335 of retainer 300,smooth outer surface 260 adjacent front end 220 and hexagonal configuration 265 adjacent back end 225. Coupling portion 200 may be made from any appropriate material, for example, metallic material, such as brass, and may be plated with a conductive, corrosion-resistant material, such as nickel.
Retainer 300 has front end 310 and back end 320 with internal surface 330 extending therebetween. Rearward facing annular surface 335 serves to rotatably retain coupler 200. Barb 340 engages body 400 at step 341to facilitate locating retainer 300 with respect to body 400. Retainer 300 may or may not have optional monolithic grounding flange 345. Retainer 300 may be made from any appropriate material, for example, metallic material, such as brass, and may be plated with a conductive, corrosion-resistant material, such as nickel.
Body 400 has internal surface 415 extending between front end 410 and rear end 420 and defining longitudinal opening 425. Body 400 also has outer surface 432 disposed proximate back end 420 to engage and retain shell 700, inner surface 435 to engage retainer 300, annular groove 440 to retain shell 700, and internal groove 430 to engage ferrule 500. Additionally, body 400 has tapered surface 450 proximate rear end 420 serving to shape or form separate and distinct sealing member 600 when shell 700 is advanced over body 400 forcing sealing member 600 under or into the body 400. Body 400 may be made from any appropriate material, such as, for example, plastic such as acetal.
Sealing member 600 may have front end 610, rear end 620, interior passage 625 and an external shape 630 and be disposed within opening 730 of shell 700. Front end 610 is preferably disposed against rear end 420 of body 400 and rear end 620 is preferably disposed against surface 735 of the shell 700. Sealing member 600 may be made of any appropriate material, for example, a rubber-like plastic material such as silicone or ethylene propylenediene monomer (EPDM).
Shell 700 has front end 710 and back end 720 with annular ring 740 proximate front end 710 to engage and be retained on body 400 by the annular groove 440. Shell 700 has outer surface 750 and internal surface 730 defining an opening 755 therethrough. As can be seen in
Returning to
The assembly of coaxial cable connector 100 will now be discussed with reference to
Turning to
In
Turning to
Alternatively, helical inclined plane system may consist of an external helical inclined plane on body 805 with a single tooth or peg as a follower as part of shell 850. The inverse is possible as well, where helical inclined plane system may consist of an internal helical inclined plane on shell 850 with a single tooth or peg as a follower as part of body 805. Gripping ribs 810 and 860 serve for applying hand-torque to the connector 800 during installation onto a coaxial cable and may be in any number of configurations that provides an improved grippable surface, such as a knurl, diamond or other suitable pattern.
Many modifications and other embodiments set forth herein will come to mind to one skilled in the art to which the embodiments pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the description and claims are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims.
It is intended that the embodiments cover the modifications and variations of the embodiments provided they come within the scope of the appended claims and their equivalents. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
This application claims the benefit of priority under 35 U.S.C. §119 of U.S. Provisional Application Ser. No. 61/714,504 filed on Oct. 16, 2012, the content of which is relied upon and incorporated herein by reference in its entirety. This application claims the benefit of priority under 35 U.S.C. §119 of U.S. Provisional Application Ser. No. 61/728,474 filed on Nov. 20, 2012, the content of which is relied upon and incorporated herein by reference in its entirety. This application is related to U.S. application Ser. No. 13/198,765, filed Aug. 5, 2011, which is incorporated herein by reference in its entirety. This application is related to U.S. application Ser. No. 13/653,095, filed Oct. 16, 2012, which is incorporated herein by reference in its entirety. This application is related to U.S. application Ser. No. 13/652,969, filed Oct. 16, 2012, which is incorporated herein by reference in its entirety.
Number | Date | Country | |
---|---|---|---|
61714504 | Oct 2012 | US | |
61728474 | Nov 2012 | US |