Patent Grant
11415759
The disclosure is directed to devices for providing optical connections in a communications network along with methods for making the same. More specifically, the disclosure is directed to devices having a compact form-factor and simplified design along with an along with methods of making the same.
Optical fiber is increasingly being used for a variety of applications, including but not limited to broadband voice, video, and data transmission. As bandwidth demands increase optical fiber is migrating deeper into communication networks such as in fiber to the premises applications such as FTTx, 5G and the like. As optical fiber extended deeper into communications networks the need for making robust optical connections in outdoor applications in a quick and easy manner was apparent. To address this need for making quick, reliable, and robust optical connections in communication networks for the outside the plant environment hardened fiber optic connectors such as the OptiTap® plug connector were developed.
Multiports were also developed for making an optical connection with hardened connectors such as the OptiTap. Prior art multiports have a plurality of receptacles mounted through a wall of the housing for protecting an indoor connector inside the housing that makes an optical connection to the external hardened connector of the branch or drop cable.
Illustratively,
Although, the housing 3 of the prior art multiport 1 is rugged and weatherable for outdoor deployments, the housings 3 of multiport 1 are relatively bulky for mounting multiple receptacles 7 for the hardened connector on the housing 3. Receptacles 7 allow an optical connection between the hardened connector such as the OptiTap male plug connector on the branch cable with a non-hardened connector such as the SC connector disposed within the housing 3, which provides a suitable transition from an outdoor space to an protected space inside the housing 3.
Receptacle 7 for the OptiTap connector is described in further detail in U.S. Pat. No. 6,579,014. As depicted in U.S. Pat. No. 6,579,014, the receptacle includes a receptacle housing and an adapter sleeve disposed therein. Thus, the receptacles for the hardened connector are large and bulky and require a great deal of surface array when arranged in an array on the housing 3 such as shown with multiport 1. Further, conventional hardened connectors use a separate threaded or bayonet coupling that requires rotation about the longitudinal axis of the connector and room for grabbing and rotating the coupling by hand when mounted in an array on the housing 3.
Consequently, the housing 3 of the multiport 1 is excessively bulky. For example, the multiport 1 may be too boxy and inflexible to effectively operate in smaller storage spaces, such as the underground pits or vaults that may already be crowded. Furthermore, having all of the receptacles 7 on the housing 3, as shown in
Other multiports designs have been commercialized to address the drawbacks of the prior art multiports depicted in
Although, these types of multiport designs such as shown in
Consequently, there exists an unresolved need for multiports that allow flexibility for the network operators to quickly and easily make optical connections in their optical network while also addressing concerns related to limited space, organization, or aesthetics.
The disclosure is directed to multiport and methods of making multiports as disclosed herein and recited in the claims.
One aspect of the disclosure is directed to a multiport for providing an optical connection comprising a shell and a connection port insert. The shell comprises a first end having a first opening leading to a cavity. The connection port insert comprises a body having a front face and at least one connection port comprising an optical connector opening extending from the front face into the connection port insert with a connection port passageway extending through part of the connection port insert to a rear portion, where the connection port insert is sized so that at least a portion of the connection port insert fits into the first opening and the cavity of the shell.
Another aspect of the disclosure is directed to a multiport for providing an optical connection comprising a shell and a connection port insert. The shell comprises a first end having a first opening leading to a cavity. The connection port insert comprises a body having a front face and at least one connection port comprising an optical connector opening extending from the front face into the connection port insert with a connection port passageway extending through part of the connection port insert to a rear portion and comprising a retention feature associated with the connection port passageway, where the connection pork insert is sized so that at least a portion of the connection port insert fits into the first opening and the cavity of the shell.
Still another aspect of the disclosure is directed to a multiport for providing an optical connection comprising a shell, a connection port insert, and at least one optical fiber. The shell comprises a first end having a first opening leading to a cavity. The connection port insert comprises a body having a front face and at least one connection port comprising an optical connector opening extending from the front face into the connection port insert with a connection port passageway extending through part of the connection port insert to a rear portion, where the connection port insert is sized so that at least a portion of the connection port insert fits into the first opening and the cavity of the shell. The at least one optical fiber is routed from at least one connection port toward an input connection port for providing optical connectivity with the multiport.
Yet another aspect of the disclosure is directed to a multiport for providing an optical connection comprising a shell, a connection port insert, at least one optical fiber, and at least one rear connector. The shell comprises a first end having a first opening leading to a cavity. The connection port insert comprises a body having a front face and at least one connection port comprising an optical connector opening extending from the front face into the connection port insert with a connection port passageway extending through part of the connection port insert to a rear portion, where the connection port insert is sized so that at least a portion of the connection port insert fits into the first opening and the cavity of the shell. The at least one optical fiber is routed from at least one connection port toward an input connection port within the shell. The at least one rear connector is in communication with the at least one connection port passageway from the rear portion, where the at least one rear connector is associated with the plurality of optical fibers.
Another aspect of the disclosure is directed to a multiport for providing an optical connection comprising a shell, a connection port insert, at least one optical fiber and at least one rear connector. The shell comprises a first end having a first opening leading to a cavity. The connection port insert comprises a body having a front face and at least one connection port comprising an optical connector opening extending from the front face into the connection port insert with a connection port passageway extending through part of the connection port insert to a rear portion, where the connection port insert is sized so that at least a portion of the connection port insert fits into the first opening and the cavity of the shell. The connection port insert comprises a sealing location disposed a first distance from the front face and a connector mating plane is disposed at a second distance from the front face with the second distance being greater than the first distance. At least one optical fiber being routed from the at least one connection port toward an input connection port within the shell. The at least one rear connector is in communication with the at least one connection port passageway from the rear portion, where the at least one rear connector is associated with the at least one optical fiber.
The disclosure is also directed to methods of making a multiport. One method comprises routing at least one optical fiber from a rear portion of at least one connection port of a connection port insert so that the at least one optical fiber is available for optical communication at an input connection port of the connection port insert; inserting the connection port insert into an opening disposed in a first end of a shell so that at least a portion of the connection port insert fits into the opening and is disposed within a cavity of the shell; and the connection port insert comprises a body comprising a front face and at least one connection port comprising an optical connector opening extending from the front face into the connection port insert with a connection port passageway extending through part of the connection port insert to the rear portion.
Additional features and advantages will be set forth 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 same as described herein, including the detailed description that follows, the claims, as well as the appended drawings.
It is to be understood that both the foregoing general description and the following detailed description present embodiments that are intended to provide an overview or framework for understanding the nature and character of the claims. The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated into and constitute a part of this specification. The drawings illustrate various embodiments and together with the description serve to explain the principles and operation.
Reference will now be made in detail to the embodiments of the disclosure, examples of which are illustrated in the accompanying drawings. Whenever possible, like reference numbers will be used to refer to like components or parts.
The concepts for the devices disclosed herein are suitable for providing at leak one optical connection to a device for indoor, outdoor or other environments as desired. Generally speaking, the devices disclosed and explained in the exemplary embodiments are multiports, but the concepts disclosed may be used with any suitable device as appropriate. As used herein, the term “multiport” means any device comprising at least one connection port for making an optical connection and a retention feature or securing feature associated with the at least one connection port. By way of example, the multiport may be any suitable device having at least one optical connection such as a passive device like an optical closure (hereinafter “closure”) or an active device such as a wireless device having electronics for transmitting or receiving a signal.
The concepts disclosed advantageously allow compact form-factors for devices such as multiports comprising at least one connection port and the retention feature or securing feature associated with the connection port. The concepts are scalable to many connection ports on a device in a variety of arrangements or constructions. The compact form-factors may allow the placement of the devices in tight spaces in indoor, outdoor, buried, aerial, industrial or other applications while providing at least one connection port that is advantageous for a robust and reliable optical connection in a removable and replaceable manner. The disclosed devices may also be aesthetically pleasing and provide organization for the optical connections in manner that the prior art multiports cannot provide.
The devices disclosed are simple and elegant in their designs. The devices disclosed comprise at least one connection port and a retention feature or securing feature associated with the connection port that is suitable for retaining an external fiber optic connector received by the connection port. Unlike prior art multiports, some of the concepts disclosed advantageously allow the quick and easy connection and retention by inserting the fiber optic connectors directly into the connection port of the device without the need or space considerations for turning a threaded coupling nut or bayonet for retaining the external fiber optic connector. Generally speaking, the retention features or securing features disclosed for use with devices herein may comprise one or more components with at least one component translating for releasing or securing the external fiber optic connector to the device. As used herein, the term “securing feature” excludes threaded portions or features for securing a bayonet disposed on a connector.
Since the connector footprint used with the devices disclosed does not require the bulkiness of a coupling nut or bayonet, the fiber optic connectors used with the devices disclosed herein may be significantly smaller than conventional connectors used with prior art multiports. Moreover, the present concepts using the securing features with the connection ports on devices allows an increased density of connection ports per volume of the shell since there is no need for accessing and turning the coupling nut or bayonets by hand for securing a fiber optic connector like the prior art multiports.
The devices disclosed comprise a retention feature or securing feature for directly engaging with a suitable portion of a connector housing of the external fiber optic connector or the like for securing an optical connection with the device. Different variations of the concepts are discussed in further detail below. The structure for securing the fiber optic connectors in the devices disclosed allows much smaller footprints for both the devices and the fiber optic connectors. Devices may also have a dense spacing of connection ports if desired. The devices disclosed advantageously allow a relatively dense and organized array of connection ports in a relatively small form-factor while still being rugged for demanding environments. As optical networks increase densifications and space is at a premium, the robust and small-form factors for devices such as multiports, closures and wireless devices becomes increasingly desirable for network operators.
The concepts disclosed herein are suitable for optical distribution networks such as for Fiber-to-the-Home applications, but are equally applicable to other optical applications as well including indoor, automotive, industrial, wireless or other suitable applications. Additionally, the concepts may be used with any suitable fiber optic connector footprint that cooperates with the retention feature or securing features disclosed, but the concepts disclosed herein may be used with other fiber optic connectors as well. Various designs, constructions or features for devices are disclosed in more detail as discussed herein.
Multiports provide optical connections to the multiport by inserting one or more external fiber optic connectors 10 as needed. Specifically, the connection port passageway 233 is configured for receiving a suitable fiber optic connector 10 (hereinafter connector) of fiber optic cable assembly 100 (hereinafter cable assembly) as depicted in
A plurality of optical fibers 250 are routed from one or more of the plurality of connection ports 236 toward an input connection port 260 for optical communication with the multiport 200. The input connection port 260 may be configured in a variety of different manners with any of the multiports disclosed herein as appropriate. For the sake of simplicity and clarity in the drawings, all of the optical fiber pathways may not be illustrated or portions of the optical fiber pathways may be removed in places so that other details of the design are visible.
Multiport 200 of
In the embodiment shown in
Although not visible in
Multiports may also have one or more dust caps 295 for protecting the connection port 236 or input connection ports 260 from dust, dirt or debris entering the multiport or interfering with the optical performance. Thus, when the user wishes to make an optical connection to the multiport, the appropriate dust cap 295 is removed and then connector 10 of cable assembly 100 may be inserted into the respective connection port 236 for making an optical connection to the multiport 200. Shells 210 may have any suitable shape, design or configuration as desired. The shell 210 of multiport 200 shown in
Any of the multiports 200 disclosed herein may optionally be weatherproof by appropriately sealing the connection port insert(s) 230,230′ with the shell 210 using any suitable means such as gaskets, O-rings, adhesive, sealant, welding, overmolding or the like. Moreover, the interface between the connection ports 236 and the dust cap 295 or connector 10 may be sealed using appropriate geometry and/or a sealing element such as an o-ring or gasket. Likewise, the input connection port may be weatherproofed in a suitable manner depending on the configuration such as a gasket, or O-ring with an optical connection or a heat shrink when using an input tether. If the multiport 200 is intended for indoor applications, then the weatherproofing may not be required.
However, the devices disclosed may locate the at least one connection port 236 in other portions or components of the device other than the connection port insert 230 using the concepts as disclosed herein as desired.
By way of explanation, other embodiments using the concepts disclosed herein may have the at least one connection port 236 being formed as a portion of a shell of the device. By way of explanation, at least one connection port 236 is molded as a first portion of shell 210 and a second portion of the shell 210 is a cover used for closing the opening such as at the bottom of the two-piece shell. In other words, instead of the parting line being in a vertical direction between the components of the connection port insert 230 and the shell 210 as shown in
Additionally, multiport 200 of
Furthermore, the input tether 270 may further comprise a furcation body 270F that has a portion that fits into a portion of the shell or the connection port insert 230 such as the bore of input connection port or that is disposed within the shell 210. The furcation body 270 is a portion of the input tether that transitions the optical fibers 250 to individual fibers for routing within the cavity 216 of the shell to the respective connector ports. As an example, a ribbon may be used for insertion into the back end of the ferrule of fiber optic connector 278 and then be routed through the input tether 270 to the furcation body 270F where the optical fibers are then separated out into individual optical fibers 250. From the furcation body 270F the optical fibers 250 may be protected with a buffer layer or not inside the cavity 216 of the multiport 200 and then terminated on a rear connector 252 (see
Consequently, the input tether 270 with the furcation body 270F may be assembled with the rear connectors 252 and/or fiber optic connector 278 in a separate operation from the assembly of multiport 200. Thereafter, the rear connectors 252 may be individually threaded through a bore 260B of the input connection port 260 (see
As depicted in
As shown in
The connection port passageways 233 may be configured for the specific connector 10 intended to be received externally into the multiport 200. Moreover, the connection port passageways 233 may be configured to provide a weatherproof seal with connector 10 or dust cap 295 for inhibiting dust, dirt, debris or moisture from entering the multiport 200 at a connection port passageway sealing surface 233SS (see
Rear connector 252 shown in
Rear connectors 252 can have other configurations for use with the multiports disclosed herein. By way of example, rear connectors 252 may comprise a resilient member for biasing the rear connector ferrule 252F. Additionally, rear connectors 252 may further comprise a keying feature. Likewise, connection port insert 230 can have other configurations for use with the multiports disclosed herein. By way of example, the connection port insert may comprise a plurality of adapters 230A that are integrally-formed with the connection port insert 230.
Connection port insert 230 may have the input connection port 260 disposed in any suitable location on the connection port insert 230. The previous embodiments of the connection port insert 230 depicted the input connection port 260 disposed in an outboard position of the connection port insert 230. However, the input connection port 260 may be disposed in a medial portion of the connection port insert 230 as desired. As best shown in
Multiports 200 that mate a rear connector 252 such as a SC with connector 10 that has a SC ferrule that is biased forward should have a spring force in connector 10 that mitigates concerns when mated within a ferrule sleeve or use a connector 10 that has a fixed ferrule for mitigating concerns. The spring force for connector 10 should be selected to be in a range to overcome sleeve friction and the spring force of the rear connector 10. By way of explanation, when the rear connector 252 is first inserted into the adapter 230A of connection port insert 230, the ferrule 252F of the rear connector 252 contact the ferrule sleeve 230FS and may displace the ferrule sleeve 230FS to extreme position on the right before the ferrule sleeve 230FS hits a physical stop in the adapter and the ferrule 252F is inserted into the ferrule sleeve 230FS. Thus, when the connector 10 is later inserted into the connector port 236 of the multiport it would be helpful for the ferrule to push the ferrule sleeve 230FS from an extreme position in the adapter if it was displaced. Consequently, the spring selected for biasing the ferrule of connector 10 should overcome the sum of initial friction along with the insertion friction to move the ferrule sleeve 230FS, thereby inhibiting the ferrule sleeve 230FS from being displaced at a maximum displaced position due to the rear connector 252 being inserted for mating first.
Shells 210 and connector port inserts 230 allow relative small multiports 200 having a relatively high-density of connections along with an organized arrangement for connectors 10 exiting the multiports 200. Shells have a given height H, width W and length L that define a volume for the multiport as depicted in
Furthermore, multiports 200 may have any suitable arrangement of connection ports 236 in connector port insert 230. By way of explanation,
Table 1 below compares representative dimensions, volumes, and normalized volume ratios with respect to the prior art of the shells (i.e., the housings) for multiports having 4, 8 and 12 ports as examples of how compact the multiports of the present application are with respect to convention prior art multiports. Specifically, Table 1 compares examples of the conventional prior art multiports such as depicted in
One of the reasons that the size of the multiports may be reduced in size with the concepts disclosed herein is that the connectors 10 that cooperate with the multiports may have locking features 20L that are integrated into the housing 20 of the connectors. In other words, the locking features for securing connector 10 are integrally formed in the housing 20 of the connector, instead of being a distinct and separate component like the conventional connector, Conventional connectors for multiports have threaded connections that require finger access for connection and disconnecting. By eliminating the threaded coupling nut (which is a separate component that must rotate about the connector) the spacing between conventional connectors may be reduced. Also eliminating the dedicated coupling nut from the conventional connectors also allows the footprint of the connectors to be smaller, which also aids in reducing the size of the multiports disclosed herein.
However, by changing the material and operation, the retention feature 233A may become a securing feature 310. By way of explanation, the pin could be configured so that it translates into and out of the paper within bore 230B and made of a more rigid material such as metal. Consequently, the metal pin could secure a dust cap 295 by cooperating with a scallop or groove in the dust cap 295 so when the pin is in a closed position the dust cap 295 could not be removed and protects the connection port 236. When the user desired to insert a connector into the connection port 236, he would move the pin to an open position by translating the pin out of paper so the pin did not interfere with the removal of the dust cap 295. Then the user could insert the connector 10 into the connection port 236 and translate the pin back into the paper so that the pin engaged a complementary scallop or groove on connector 10 and removal of the connector is inhibited. Thus, the retention 233A becomes securing feature 310 for securing the connector 10 within the connection port 236. Alternatively, the pin could have a flat portion and when the pin is rotated to the flat portion facing the scallop or groove then insertion and removal of the connector past the pin is allowed and when the pin rotates to a round portion the scallop or groove is engaged by the pin and the connector 10 is inhibited from being removed or inserted, thereby acting as a securing feature 310. Other variations could have the pin with a flat surface that rotates as the connector 10 is inserted or removes by having the rotation of the pin being driven by the surface of the connector 10. Illustratively,
Any of the multiports 200 disclosed herein may optionally be weatherproof by appropriately sealing the connection port insert or second insert 230,230′ with the shell 210 using other suitable means such as adhesive, sealant, welding, overmolding or the like. For instance, adhesive or sealant may be applied about the perimeter of the insert. Likewise, welding such as ultrasonic or induction welding may be used as appropriate for the sealing element 290. Moreover, the interface between the connection ports 236 and the dust cap 295 or connector 10 may be sealed using appropriate geometry and/or a sealing element such as an O-ring or gasket. Likewise, the input connection port may be weatherproofed in a suitable manner depending on the configuration such as a gasket, or O-ring with an optical connection or a heat shrink when using an input tether. Thus, making the multiports 200 suitable for an outdoor environment.
Multiports 200 can have other features or constructions using a second insert 230′ that is similar to the connection port insert 230. For instance, the second insert 230′ comprises a body 232 having a front face 234 comprising a plurality of connection ports 236 having an optical connector port opening 238 like the connection port insert 230, Second inserts 230′ can have other configurations as well for use with the multiports disclosed herein. Moreover, any of the multiport designs disclosed herein may use an optical splitter 275 (hereinafter “splitter”) within a cavity 216 or furcation body 270F of the multiports 200. By way of example, splitters 275 allow a single optical signal to be split into multiple signals such as 1×N split, but other splitter arrangements are possible such as a 2×N split. For instance a single optical fiber may feed an input tether 270 of multiport 200 and use a 1×8 splitter to allow eight connection ports 236 on the connection port insert.
Any suitable type of securing features may be used with the concepts disclosed herein and examples of the same are disclosed. Depending on the type of securing feature different types of actuation movement may be used for translation such as rotation, translation, or deforming of components. Further, embodiments may include other components such as protectors or covers 230C for keeping dirt, debris and other contaminants away from the actuation mechanism as desired.
By way of example and illustration, securing feature 310 of the multiport of
As best shown in
As depicted in
The present application also discloses methods for making a multiport. One method comprises inserting a connection port insert 230 into an opening 214 disposed in a first end 212 of an shell 210 so that at least a portion of the connection port insert 230 fits into the opening 212 and is disposed within a cavity 216 of the shell 210; and wherein the connection port insert 230 comprises a body 232 having a front face 234 and a plurality of connection ports 236 with each connector port 236 having an optical connector opening 238 extending from the front face 234 into the connection port insert 230 with a connection port passageway 233 extending through part of the connection port insert to a rear portion 237.
Another method for making a multiport comprises routing a plurality of optical fibers 250 from one or more rear portions 237 of a plurality of connection ports 236 of a connection port insert 230 so that the plurality of optical fibers 250 are available for optical communication at an input connection port 260 of the connection port insert 230. Then inserting the connection port insert 230 into an opening 214 disposed in a first end 212 of a shell 210 so that at least a portion of the connection port insert 230 fits into the opening 212 and is disposed within a cavity 216 of the shell 210; and wherein the connection port insert 230 comprises a body 232 having a front face 234 and a plurality of connection ports 236 with each connector port 236 having an optical connector opening 238 extending from the front face 234 into the connection port insert 230 with a connection port passageway 233 extending through part of the connection port insert to the rear portion 237.
The methods disclosed may further include installing at least one securing feature 310 into the connection port insert 230 so that the at least one securing feature 310 is associated with one or more of the plurality of connection ports 236. The securing feature 310 may include an open position OP and a closed position CP. The method may include translating or rotating the at least one securing feature 310 to the open position OP and the closed position CP.
The method may also comprise a connector port insert 230 having one or more slots 230S for receiving a portion of the at least one securing feature 310. The securing feature may be a U-clip with the methods disclosed.
The methods of actuating the securing features may comprises one or more bores 230B for receiving a portion of the at least one securing feature 310. Further, the one or more bores 230B may be arranged transversely to a longitudinal axis LA of the connection port insert 230. The securing feature may comprises a cam surface 310C. The method of actuating may comprise a plurality of securing features 310 associated with one or more of the plurality of connection ports 236 or using a single securing feature 310 associated with a plurality of connection ports 236. Additionally, the step of actuating the at least one securing feature 310 may comprises an intermediate position IP, wherein the intermediate position IP permits connector insertion into the one or more of the plurality of connection ports 236 and connector removal into the one or more of the plurality of connection ports 236.
Methods of making multiport make also include providing connection port inserts 230 having one or more flexures that cooperate with one or more securing features 310 as disclosed herein.
Although the disclosure has been illustrated and described herein with reference to explanatory embodiments and specific examples thereof, it will be readily apparent to those of ordinary skill in the art that other embodiments and examples can perform similar functions and/or achieve like results. All such equivalent embodiments and examples are within the spirit and scope of the disclosure and are intended to be covered by the appended claims. It will also be apparent to those skilled in the art that various modifications and variations can be made to the concepts disclosed without departing from the spirit and scope of the same. Thus, it is intended that the present application cover the modifications and variations provided they come within the scope of the appended claims and their equivalents.
This application is a continuation of International Application No. PCT/US2017/064087 filed. Nov. 30, 2017, which claims the benefit of priority to U.S. Application No. 62/526,011, filed on Jun. 28, 2017, U.S. Application No. 62/526,018, filed on Jun. 28, 2017, and U.S. Application No. 62/526,195, filed on Jun. 28, 2017, the content of which is relied upon and incorporated herein by reference in entirety.
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| Number | Date | Country | |
|---|---|---|---|
| 20200116962 A1 | Apr 2020 | US |
| Number | Date | Country | |
|---|---|---|---|
| 62526195 | Jun 2017 | US | |
| 62526011 | Jun 2017 | US | |
| 62526018 | Jun 2017 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/US2017/064087 | Nov 2017 | US |
| Child | 16714033 | US |
