Patent Application
20240154363
The present invention relates generally to connectors for terminating coaxial cable. More particularly, the present invention relates to axially compressible connectors for hardline or semi-rigid coaxial cables.
Coaxial cables are commonly used in the cable television industry to carry cable TV signals to television sets in homes, businesses, and other locations. A hardline coaxial cable may be used to carry the signals in distribution systems exterior to these locations and a flexible coaxial cable is then often used to carry the signals within the interior of these locations. Hardline or semi-rigid coaxial cable is also used where a high degree of radio-frequency (RF) shielding is required.
The hardline cable includes a solid wire core or inner conductor, typically of copper or copper-clad aluminum, surrounded by a solid tubular outer conductor. The outer conductor is also usually made of copper or aluminum. Dielectric material or insulation separates the inner and outer conductors. The outer conductor is covered with a cable jacket or sheath of plastic to provide protection against corrosion and weathering.
Threaded cable connectors have been employed to provide even compression of the connector. Such connectors typically utilize some form of clamping mechanism that radially compresses the outer conductor of the cable against a tubular post or mandrel upon axial threaded movement of the connector components to retain the cable in the hardline connector. The clamping mechanism may include a conical sleeve surrounded by an outer sleeve which forces the conical sleeve to radially compress upon axial movement of the outer sleeve with respect to the conical sleeve. The length of the conical closure sleeve typically closes the full length of the mechanism with equal forces around the circumference of the mandrel. The resulting forces closing down on the coaxial cable compress the cable around the outside of the mandrel creating a formed bond on the outside surface.
The above referenced, and other, connectors can be used with cables having different outside diameters. However, cables having different outside diameters require the clamping mechanism to apply different amounts of compression to properly install the connector on the cable.
It may be desirable to provide a connector that overcomes one or more of the aforementioned disadvantages of hardline connectors. That is, it may be desirable to provide a connector having an improved system for use on cables of different outside diameters. For example, it may be desirable to provide the back nut of a hardline connector with markings that provide visual stop points corresponding to different amounts of compression to be applied to a cable being terminated by the connector such that a technician can apply a desired amount of compression based on the size of the cable.
Embodiments provide a cable connector having an indicator portion that is structurally configured to provide a visual stop indicator reference point when a second connector portion moves in an axial direction and when a first connector portion is coupled with the second connector portion such that a cable gripping portion grips a cable with a predetermined amount of radial force based on an outer diameter portion of the cable so as to allow an installer to use the visual stop indicator reference point to prevent under-tightening and/or over-tightening of the connector on the cable.
Embodiments include a cable connector having: a first connector portion having a cable receiving end and a forward end opposite the cable receiving end; a second connector portion having a front end, and a back end that is structurally configured to be coupled with the forward end of the first connector portion; a third connector portion that is structurally configured to be coupled with the front end of the second connector portion; a support portion that is structurally configured to be positioned in the second connector portion; a cable gripping portion that is structurally configured to be positioned partially in the support portion; and a plurality of indicator portions. The cable gripping portion is structurally configured to include an angled portion; the support portion is structurally configured to include an angled portion that is structurally configured to contact the angled portion of the cable gripping portion; the angled portion of the support portion is structurally configured to move axially relative to the angled portion of the cable gripping portion when the first connector portion moves relative to the second connector portion; the first connector portion is structurally configured to include an engaging portion; the second connector portion is structurally configured to include an engaging portion; the engaging portion of the first portion is structurally configured to engage with the engaging portion of the second connector portion such that rotation of the first connector portion relative to the second connector portion moves the first connector portion axially relative to the second connector portion; the first connector portion includes a first surface that is structurally configured to contact the support portion; the first surface of the first portion is structurally configured to move the support portion axially into the second connector portion in response to the axial movement of the first connector portion relative to the second connector portion; the angled portion of the support portion is structurally configured to move relative to the angled portion of the cable gripping portion is response to axial movement of the support portion such that the cable gripping portion is moved radially inward; each of the plurality of indicator portions is structurally configured to correspond to a predetermined position of the first portion relative to the second connector portion; each of the predetermined positions of the first connector portion relative to the second connector portion corresponds to a preferred assembled position for a particular outer diameter of a cable on which the connector is to be installed; the indicator portions correspond to different amounts of radial compression of the cable gripping portion in response to axial movement of the support portion; and the indicator portions are structurally configured to provide visual stop indicator reference points when the second connector portion moves in an axial direction and when the first connector portion is coupled with the second connector portion such that the cable gripping portion grips the cable with a predetermined amount of radial force based on an outer diameter portion of the cable so as to allow an installer to use the visual stop indicator reference point to prevent under-tightening and/or over-tightening of the connector on the cable.
In particular embodiments, the first connector portion comprises a back nut assembly.
In particular embodiments, the second connector portion comprises a center body.
In particular embodiments, the third connector portion comprises a front nut assembly.
In particular embodiments, the support portion comprises a support sleeve.
In particular embodiments, the cable gripping portion comprises a cable gripping ferrule.
In particular embodiments, the angled portion of the cable gripping portion comprises a ramp.
In particular embodiments, the angled portion of the support portion comprises a ramp.
In particular embodiments, each of the indicator portions is structurally configured as a groove.
In particular embodiments, the first connector portion is structurally configured to include the plurality of indicator portions on an outer surface of the first connector portion.
In particular embodiments, the engaging portion of the first connector portion comprises a threaded portion.
In particular embodiments, the engaging portion of the second connector portion comprises a threaded portion.
Embodiments include a cable connector having: a first connector portion having a cable receiving end and a second end opposite the cable receiving end; a second connector portion having a first end, and a second end that is structurally configured to be coupled with the second end of the first connector portion; a support portion that is structurally configured to be positioned in the second connector portion; a cable gripping portion that is structurally configured to be positioned partially in the support portion; and an indicator portion. The support portion is structurally configured to move axially relative to the cable gripping portion when the first portion moves relative to the second connector portion; the first connector portion is structurally configured to engage with the second connector portion such that rotation of the first connector portion relative to the second connector portion moves the first portion axially relative to the second connector portion; the first connector portion is structurally configured to move the support portion axially relative to the second connector portion in response to the axial movement of the first portion relative to the second connector portion; the indicator portion corresponds to an amount of radial compression of the cable gripping portion in response to axial movement of the support portion; and the indicator portion is structurally configured to provide a visual stop indicator reference point when the second connector portion moves in an axial direction and when the first connector portion is coupled with the second connector portion such that the cable gripping portion grips the cable with a predetermined amount of radial force based on an outer diameter portion of the cable so as to allow an installer to use the visual stop indicator reference point to prevent under-tightening and/or over-tightening of the connector on the cable.
In particular embodiments, the first connector portion comprises a back nut assembly.
In particular embodiments, the second connector portion comprises a center body.
In particular embodiments, the support portion comprises a support sleeve.
In particular embodiments, the cable gripping portion comprises a cable gripping ferrule.
In particular embodiments, the first connector portion is structurally configured to include the indicator portion on an outer surface of the first connector portion.
In particular embodiments, the indicator portion comprises a plurality of indicator portions.
In particular embodiments, the cable connector further comprises a third connector portion that is structurally configured to be coupled with the first end of the second connector portion.
In particular embodiments, the first connector portion is structurally configured to include an engaging portion, the second connector portion is structurally configured to include an engaging portion, and the engaging portion of the first connector portion is structurally configured to be engaged with the engaging portion of the second connector portion such that rotation of the first connector portion relative to the second connector portion moves the first portion axially relative to the second connector portion.
In particular embodiments, the first connector portion includes a first surface that is structurally configured to contact the support portion, the first surface of the first connector portion is structurally configured to move the support portion axially into the second connector portion in response to the axial movement of the first connector portion relative to the second connector portion.
In particular embodiments, the cable gripping portion is structurally configured to include an angled portion, the support portion is structurally configured to include an angled portion that is structurally configured to contact the angled portion of the cable gripping portion, and the angled portion of the support portion is structurally configured to move relative to the angled portion of the cable gripping portion is response to axial movement of the support portion such that the cable gripping portion is moved radially inward.
In particular embodiments, the indicator portion comprises a first indicator portion, the cable connector comprises a second indicator portion, the first indicator portion is structurally configured to correspond to a first predetermined position of the first connector portion relative to the second connector portion that corresponds to a preferred installed position for a first particular outer diameter of a cable on which the connector is installed, and the second indicator portion is structurally configured to correspond to a second predetermined position of the first connector portion relative to the second connector portion that corresponds to a preferred installed position for a second particular outer diameter of a cable on which the connector is installed.
In particular embodiments, the first and second indicator portions are structurally configured to facilitate the connector being installed on the cable with a preferred force for a given outer diameter of the cable.
Embodiments include a cable connector having: a support portion that is structurally configured to move relative to a cable gripping portion when a first connector portion moves relative to a second connector portion; and an indicator portion that is structurally configured to indicate an amount of radial compression of a cable gripping portion when the second connector portion moves in an axial direction. The indicator portion is structurally configured to provide a visual stop indicator reference point when the second connector portion moves in the axial direction and when the first connector portion is coupled with the second connector portion such that the cable gripping portion grips the cable with a predetermined amount of radial force based on an outer diameter portion of the cable so as to allow an installer to use the visual stop indicator reference point to prevent under-tightening and/or over-tightening of the connector on the cable.
In particular embodiments, the cable connector further comprises the support portion, and the support portion is structurally configured to be positioned in the second connector portion.
In particular embodiments, the first connector portion is structurally configured to move the support portion axially relative to the second connector portion in response to the movement of the first connector portion relative to the second connector portion.
In particular embodiments, the cable connector further comprises the cable gripping portion, and the support portion is structurally configured to move axially relative to the cable gripping portion when the first connector portion moves relative to the second connector portion.
In particular embodiments, the cable connector further comprises the cable gripping portion, and the cable gripping portion is structurally configured to be positioned partially in the support portion.
In particular embodiments, the first connector portion is structurally configured to engage with the second connector portion such that rotation of the first connector portion relative to the second connector portion moves the first connector portion axially relative to the second connector portion.
In particular embodiments, the indicator portion comprises a first indicator portion, the cable connector comprises a second indicator portion, the first indicator portion is structurally configured to correspond to a first predetermined position of the first connector portion relative to the second connector portion that indicates a preferred installed position for a first particular outer diameter of a cable on which the connector is to be installed, and the second indicator portion is structurally configured to correspond to a second predetermined position of the first connector portion relative to the second connector portion that indicates a preferred installed position for a second particular outer diameter of a cable on which the connector is to be installed.
Although embodiments of the disclosure are described with reference to a hardline connector, the features of the disclosure are also applicable to flexible coaxial cable connectors.
Various aspects of the hardline coaxial connector, as well as other embodiments, objects, features and advantages of this disclosure, will be apparent from the following detailed description of illustrative embodiments thereof, which is to be read in conjunction with the accompanying drawings.
Embodiments provide a cable connector having an indicator portion that is structurally configured to provide a visual stop indicator reference point when a second connector portion moves in an axial direction and when a first connector portion is coupled with the second connector portion such that a cable gripping portion grips a cable with a predetermined amount of radial force based on an outer diameter portion of the cable so as to allow an installer to use the visual stop indicator reference point to prevent under-tightening and/or over-tightening of the connector on the cable.
Embodiments of the disclosure provide the back nut of a hardline connector with markings that provide visual stop points corresponding to different amounts of compression to be applied to a cable being terminated by the connector such that a technician can apply a desired amount of compression based on the size of the cable. Although examples shown include a three piece body (front nut assembly, center body, back nut assembly), other embodiments include a two piece body such as, for example, a main body and a back nut assembly.
Referring
A coaxial cable 10, for example, a hardline coaxial cable, is inserted into the rearward end of the back nut assembly 120 of the connector 100. Coaxial cables generally include a solid center conductor typically formed from a conductive metal, such as copper, copper clad aluminum, copper clad steel, or the like capable of conducting electrical signals therethrough. Surrounding the cable center conductor is a cable dielectric, which insulates the cable center conductor to minimize signal loss. The cable dielectric also maintains a spacing between the cable center conductor and a cable outer conductor or shield. The cable dielectric is often a plastic material, such as, for example, a polyethylene, a fluorinated plastic material, such as, for example, a polyethylene or a polytetrafluoroethylene, a fiberglass braid, or the like. The cable shield or outer conductor is typically made of metal, such as aluminum or copper, and is often extruded to form a hollow tubular structure with a solid wall having a smooth exterior surface. An insulative cable jacket may surround the cable outer conductor to further seal the coaxial cable. The cable jacket is typically made of plastic, such as polyvinylchloride, polyethylene, polyurethane, or polytetrafluoroethylene.
The connector 100 includes a plurality of components generally having a coaxial configuration about an axis defined by a center conductor 12 of the coaxial cable 10. The front nut assembly 130 includes third portion main portion, for example, a front body housing, 132 supporting an extending conductor portion, for example, a pin assembly, 150 therein. Specifically, the front body housing 132 is formed with an axial bore configured to cooperatively contain the pin assembly 150 and is made from an electrically conductive material such as aluminum, brass, or the like. The front body housing 132 is formed with an external threaded portion at its forward end and a rearward external threaded portion opposite the forward threaded portion. The forward threaded portion is configured to cooperate with devices located in the field that receive the forward end of the pin assembly 150. A seal, for example, an O-ring, may be provided around the forward threaded portion to improve the seal that is made with a device. A portion of the exterior perimeter of the front body housing 132 may be provided with a tool receiving portion, for example, a hexagonal shape, to accommodate the use of tools during installation. An insulative (i.e., non-conductive) portion, for example, an insulative body, 140 maintains the position of the pin assembly 150 in the front body housing 132. A seizure portion, for example, a seizure bushing, 170 is urged forward into the front nut housing 132 by a conductor portion, for example, a mandrel, 160 during assembly and compresses a gripping portion in the pin assembly 150 around the center conductor 12 of the coaxial cable 10.
The rearward threaded portion of the front nut assembly 130 is configured to cooperate with the body. Specifically, the rearward threaded portion includes a rim face that cooperates with the mandrel 160. A seal, for example, an O-ring, may be provided around the rearward threaded portion to improve the seal that is made with the center body 110.
The center body 110 of the connector 100 includes a compression subassembly rotatably supported within the axial bore. The compression subassembly generally includes the mandrel 160, a support portion, for example, a support sleeve, 200, and a cable gripping portion, for example, a cable gripping ferrule, 300 arranged in a coaxial relationship about the central axis of the center body 110.
A first connector portion main portion, for example, a back body housing, 121 of the back nut assembly 120 is made from an electrically conductive material, such as, for example, aluminum, brass, or the like, and includes an engaging portion, for example, a forward threaded portion, configured to cooperate with an engaging portion, for example, a rearward threaded portion, of the center body 110 so that the back body housing 121 and the center body 110 may be threadedly coupled together. The exterior surface of the back body housing 121 is preferably provided with a tool receiving portion, for example, a hexagonal shape, to accommodate the use of tools to facilitate such threaded coupling.
As the support sleeve 200 moves axially forward relative to the cable gripping ferrule, an angled surface, for example, a ramp, 230 of the support sleeve 200 presses both axially and radially on an angled surface, for example, a ramp, 330 of the cable gripping ferrule 300 (see
As described above, movement of the back body housing 121 into the center body 110 causes the cable gripping ferrule to clamp down on the coaxial cable 10. The farther the back body housing 121 moves into the center body 110, the more radially inward force is exerted on the coaxial cable 10 by the cable gripping ferrule 300. Gaps 390 (shown in
Because coaxial cables having different outer diameters require a different relative position of the support sleeve 200 to the cable gripping ferrule 300 for proper installation, it is beneficial to know the position of the back body housing 121 relative to the center body 110 that corresponds to the proper relative position of the support sleeve 200 to the cable gripping ferrule 300. With conventional connectors, a technician rotates the back body housing “by feel” into the center body to a point where the technician believes that the proper clamping force is being exerted on the coaxial cable, which can lead to improper installation. Embodiments of the invention address this problem by providing visual indicators on the back body housing 121 that indicate to the technician the proper relative position of the back body housing 121 to the center body 110.
Although the illustrative embodiments of the present invention have been described herein with reference to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and that various other changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention.
Various changes to the foregoing described and shown structures will now be evident to those skilled in the art. Accordingly, the particularly disclosed scope of the invention is set forth in the following claims.
This application claims the benefit of U.S. Provisional Application No. 63/422,883 filed Nov. 4, 2022, which is pending, the disclosure of which is hereby incorporated by reference herein in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 63422883 | Nov 2022 | US |
