FIBER-OPTIC CONNECTION ASSEMBLIES, FEATURES, COMPONENTS, AND METHODS
20210080670 · 2021-03-18
Assignee
Inventors
- Thomas A. Thigpen (Highland Village, TX, US)
- Oscar Fernando Bran de León (Belle Plaine, MN, US)
- Thomas Marcouiller (Shakopee, MN, US)
Cpc classification
G02B6/3825
PHYSICS
G02B6/3897
PHYSICS
G02B6/387
PHYSICS
International classification
Abstract
A fiber-optic connection assembly including a cable, a fiber-optic connector and an adapter. The cable terminates with the fiber-optic connector. The fiber-optic connector is removably connected to the adapter with a fastener. The fiber-optic connection assembly also includes a cover that is configured to inhibit access to the fastener. The cover includes a passageway that is configured to removably receive at least a portion of the fiber-optic connector and at least a portion of the adapter.
Claims
1. A fiber-optic connection assembly comprising: a cable, a fastener, a fiber-optic connector and an adapter, the cable terminating with the fiber-optic connector and extending away from the adapter, the fiber-optic connector being removably connected to the adapter with the fastener, the adapter comprising a protrusion; and a cover comprising a movement-inhibition arrangement, the cover being removably mounted over the fastener, and the cover being configured to inhibit unintended access to the fastener.
2. The fiber-optic connection assembly of claim 1, wherein the movement-inhibition arrangement is a protrusion-engagement arrangement removably engaged with the protrusion so that the cover is inhibited from axial movement along the cable away from the fiber-optic connector and the adapter.
3. The fiber-optic connection assembly of claim 1, wherein the cover comprises a passageway configured to removably receive at least a portion of the fiber-optic connector and at least a portion of the adapter.
4. The fiber-optic connection assembly of claim 1, wherein the fastener comprises a releasably-engaged connection between the fiber-optic connector and the adapter.
5. The fiber-optic connection assembly of claim 1, wherein the protrusion projects away from the adapter.
6. The fiber-optic connection assembly of claim 1, wherein the movement-inhibition arrangement is a lip, the lip being removably engaged with the protrusion.
7. The fiber-optic connection assembly of claim 6, wherein the lip is circumferential.
8. The fiber-optic connection assembly of claim 7, wherein the lip is discontinuous.
9. The fiber-optic connection assembly of claim 1, wherein the cover comprises a collar section and a tapered section, the collar section having a wider clearance than the tapered section.
10. The fiber-optic connection assembly of claim 1, wherein the cover is configured to rotate with respect to the fiber-optic connector and the adapter.
11. The fiber-optic connection assembly of claim 1, wherein the cover comprises a substantially rigid monolithic structure.
12. The fiber-optic connection assembly of claim 1, wherein the cover comprises a channel configured to allow the cable to be inserted therethrough.
13. The fiber-optic connection assembly of claim 1, wherein the cover comprises a channel defined by a clearance that is wider than the width of the cable and narrower than the width of the fiber-optic connector and the adapter.
14. The fiber-optic connection assembly of claim 1, wherein the cover comprises a channel extending along the entire length of the cover.
15. The fiber-optic connection assembly of claim 1, wherein the cover comprises a substantially circular cross-sectional geometry.
16. The fiber-optic connection assembly of claim 1, wherein the cover comprises a unitary structure.
17. The fiber-optic connection assembly of claim 1, wherein the cover comprises a pair of sections releasably connected to each other with a locking assembly.
18. The fiber-optic connection assembly of claim 17, wherein the pair of sections are pivotally connected to each other along a hinge.
19. The fiber-optic connection assembly of claim 1, wherein the cover comprises an open position and a closed position, the cover configured to be in the closed position when mounted about the fiber-optic connector and the adapter.
20. The fiber-optic connection assembly of claim 19, wherein the cover comprises a circular cross-sectional geometry when in the closed position.
21.-29. (canceled)
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0013]
[0014]
[0015]
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[0020]
[0021]
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DESCRIPTION OF EXAMPLE EMBODIMENTS
I. General Concepts: FIGS. 1 and 2
A. Fiber-Optic Connection Assembly
[0027]
[0028] In one example, a first 12a of the pair of fiber-optic cables can be a breakout cable and a second 12b of the pair of fiber-optic cables can be a drop cable. The example first (breakout) cable 14a can function to carry one 20a of a plurality 23 of optical fibers broken out from a multi-fiber cable, sometimes referred to as a stub cable, to a designated fiber-optic connection location. The example second (drop) cable 14b can function to carry an optical fiber 20b from the designated fiber-optic connection location to an optical network terminal, for example an end-user premises.
[0029] The pair of fiber-optic connectors 12a & 12b function to secure to the adapter 16 with a fastener assembly 22. An example fastener assembly 22 functions to releasably secure the pair of fiber-optic connectors 12a & 12b to the adapter 16. For example, the illustrated fastener assembly 22 can include correspondingly-engaging surfaces. Example correspondingly-engaging surfaces can include a first surface 24 on the adapter 24 and second surfaces 26a & 26b on the fiber-optic connectors. The correspondingly-engaged surfaces 24, 26a & 26b can be a threaded surface on the adapter 16 and correspondingly threaded surfaces on the fiber-optic connectors 12a & 12b. The fiber optic connectors 12a & 12b can be threaded into connection with the adapter 16, and reversibly removed from threaded connection with the adapter. Alternatively, the fastener assembly 22 can include corresponding snap engagement elements, corresponding key and keyway elements, or a similar assembly which functions to releasably secure the pair of fiber-optic connectors 12a & 12b to the adapter 16.
[0030] As particularly illustrated in
[0031] To maintain optical engagement between the optical fibers 20a & 20b, the fiber-optic connectors 12a & 12b should preferably remain connected in alignment to the adapter 16. However, the connection between the fiber-optic connector 12b on the drop cable 14b and the adapter 16 can be accidentally or undesirably accessed and manipulated, thus possibly causing a disconnection of the fastener 22, and a misalignment of the optical fibers 20a & 20b.
[0032] The fiber-optic connection assembly 10 also includes a cover 18, which functions to inhibit unintended access to the fastener 22 by covering at least a portion of the adapter 16 and the second fiber-optic connector 12b. For example, unintended access can include access other than by intended users such as those installing or maintaining the fiber-optic connection assembly 10. The cover 18 can have any structure and/or geometry, as long as the cover 18 functions to inhibit access to the fastener 22. Preferably, the cover 18 has a structure and/or geometry that shields/hides at least the fastener 22 from access, and more preferably shields/hides at least the fastener from access radially with respect to the fiber-optic connection assembly 10.
[0033] The cover 18 is also inhibited from unintended removal from a mounted position over the adapter 16 and the second fiber-optic connector 12b. The cover 18 can inhibit this unintended removal with a movement-inhibition arrangement 30 (or retainer).
[0034] In one option, the movement-inhibition arrangement 30 can be a protrusion-engagement arrangement 31 that engages a protrusion 28 on the adapter 16. For example, the protrusion-engagement arrangement 31 extends from the cover 18 to engage the protrusion 28 on the adapter 16 once the cover is in a mounted position to inhibit unintended access to the fastener 22. Once positioned to inhibit unintended access to the fastener 22, the illustrated cover 18 is inhibited from axial movement along the fiber-optic cable 14b away from the adapter 16 by the protrusion-engagement arrangement 31 on the cover coming into engagement with the protrusion 28 on the adapter 16.
[0035] The cover 18 can be removed from inhibiting unintended access to the fastener 22, for example by disengaging the protrusion-engagement arrangement 31 on the cover from the protrusion 28 on the adapter 16. The cover 18 can also be repositioned and reused to inhibit access to the fastener 22, without destruction, after the cover has been removed. Example fiber-optic connection assemblies which inhibit axial movement of the cover 18 along the second cable 14b by engaging a protrusion-engagement arrangement 31 with the protrusion 28 are illustrated in greater detail in
[0036] In another option, the movement-inhibition arrangement 30 can be an anchor 32 which fixes the cover 18 in position with respect to the adapter 16 and the second cable 12b. The anchor 32 is releasably fixed with respect to a base structure that supports the fiber-optic connection assembly 10. In this example the cover 18 is also releasably fixed with respect to the base structure. Example fiber-optic connection assemblies which fix the cover 18 with an anchor 32 with respect to a base structure are illustrated in greater detail in
II. Example Embodiments
A: Sleeve Embodiment: FIGS. 3-9
[0037]
[0038] The illustrated drop terminal 102 receives a multi-fiber cable 106 that removably inserts into the drop terminal. The illustrated multi-fiber cable 106 carries a plurality of optical fibers, similarly to the embodiment in
[0039] The illustrated drop terminal 102 can include at least one, preferably a plurality, of fiber-optic connectors, functioning similarly to the second fiber-optic connectors 12b in
[0040] Each fiber-optic connector in the drop terminal 102 can include a removable cap 108, supported by a fastener such as a ring and tether, which protects a fiber-optic connector during non-use. The cap 108 is secured on or around a cap ring holder 113, such as a flange, shown particularly in
[0041]
[0042] The first fiber-optic connector 112a and the second fiber-optic connector 112b can be releasably secured to the adapter 116 with corresponding engagement surfaces, for example similarly to the embodiment described in
[0043] As illustrated particularly in
[0044]
[0045] As described in the embodiment in
[0046] The illustrated cover 118a can have a monolithic single-body construction that is generally rigid. The illustrated cover 118a can have a sleeve-like body with a generally circumferential or collar-like geometry, for example a generally cylindrical shape with one consistent construction. The illustrated cover 118a can include a cable-receiving channel 144 that extends from the connection end 140a to the receiving end 142a. In use, a length of the drop cable 114, away from the second fiber-optic connector 112b and the adapter 116, is inserted through the channel 144. Once the cable 114 is inserted through the channel 144 and into the hollow passageway 146a, the cover 118a can be forced over the second fiber-optic connector 112b and onto the adapter 116. Force is applied to the cover 118a, in a direction away from the drop cable 114, to snap the protrusion engagement arrangement 131a over and past the protrusion 128. The channel 144 allows the cover 118a to flex slightly when the protrusion engagement arrangement 131a is being snapped over and past the protrusion 128. Conversely, with sufficient pulling force the cover 118a can also be pulled in a direction toward the drop cable 114 to uncover the first and second fiber optic connectors 112a, 112b and the adapter 116, such that the protrusion engagement arrangement 131a snaps over and out of engagement from the protrusion 128.
[0047] When the cover 118a is snapped over the adapter 116 and the protrusion engagement arrangement 131a axially engages the protrusion 128, the cover 118a can still be freely rotated about the adapter 116. This relationship further inhibits unintended access to the first and second fiber optic connectors 112a, 112b and the adapter 116.
[0048] The illustrated cover 118a can also include a tapered region 148 that narrows toward the receiving end 142a. The tapered region 148 narrows to provide an axially inhibitory barrier over the adapter 116 when the protrusion 128 is releasably engaged with the protrusion engagement arrangement 131a.
[0049] As illustrated, the cover 118a can have a series of vents 149 which extend through the tapered region 148. The vents 149 can continue along a plurality of recessions 151 extending between tapered region 148 and the connection end 140a. The vents 149 and recessions 151 improve manufacturing capability and usefulness of the cover 118a, for example allowing molding through what is known as a straight pull. The combination of the vents 149, recessions 151 and discontinuous protrusion engagement arrangement 131a allows the cover 118a to flex slightly when being snapped over the protrusion 128 on the adapter 116.
B: Hinged Embodiment: FIGS. 10-12
[0050]
[0051] The illustrated cover 118b can include a fastener assembly 154 shown assembled (or interlocked) in
[0052] The illustrated cover 118b, in its assembled condition shown in
[0053] As illustrated, each of the first and second shells 150a, 150b includes a protrusion engagement assembly 131b, for example an overhang or lip extending within the cover at the connection end 140b. As illustrated, the protrusion engagement assembly 131b can be generally continuous around the inner circumference of the cover 118b. When the cover 118b is closed and locked, as illustrated in
[0054] As particularly illustrated in
[0055] In use, the protrusion engagement assembly 131b on both first and second shells 150a, 150b is axially engaged with the protrusion 128 on a side opposite the drop cable 114. The cover 118b can then be removed from the adapter 116 only by unlocking the first and second locks 154a, 154b from each other and hingedly pivoting the first shell 150a away from the second shell 150b.
[0056] When the cover 118b is secured over the adapter 116 and the protrusion engagement arrangement 131b axially engages the protrusion 128, the cover 118b can still be freely rotated about the adapter 116. This relationship further inhibits unintended access to the first and second fiber optic connectors 112a, 112b and the adapter 116.
C: Anchor and Shroud Embodiment: FIGS. 13-14
[0057]
[0058] The illustrated fiber-optic connection assembly 200 is fixed between the drop terminal 102 and the bracket 104. As illustrated, the bracket 104 and the drop terminal 102 can be oriented along an axis V, and the fiber-optic connection assembly 200 and the drop cable 114 can be oriented along a different axis T. As shown, axis T can be oriented at an acute angle with respect to axis V, for example between about 30-60 degrees, preferably about 45 degrees.
[0059] The illustrated cover 218 can include a shield (or shroud) section 202 that is supported (or tethered) to an anchor (or fixation) section 204. The cover 200 is preferably a single-body construction of stiff (or rigid) material, such as metal or plastic.
[0060] The illustrated shield section 202 can define a passageway 210 extending therein to receive the first and second fiber-optic connectors 112a, 112b and the adapter 116. The shield section 202 can have a U-shaped geometry that defines a closed side and an open receiver 212 (mouth, or opening) providing access to the passageway 210. The shield section 202 can also have open front and rear ends providing access to the passageway 210. In use, as illustrated in
[0061] The illustrated anchor section 204 includes a fixation arm 206 and a support arm 208. As shown, the support arm 208 can have a length L that extends between the fixation arm 208 and the shield section 202. The length L can vary depending on needs, as described below, but should be long enough to extend from the fiber-optic connectors 112a, 112b to a bottom surface of the terminal 102.
[0062] As illustrated, the support arm 208 extends along a planar axis Y, and the fixation arm 206 extends along a planar axis X. Planar axes X and Y can be perpendicularly oriented with respect to each other. The shield section 202 can be oriented along an axis Z. Axis Z is oriented differently from axes X and Y. For example axis Z can be oriented at an acute angle with respect to axis Y, for example between about 30-60 degrees, preferably about 45 degrees. Preferably, axis Z can be oriented co-axially, or at least in parallel to, axis T shown in
[0063]
[0064] In use, the shield section 202 is placed over the first and second fiber-optic connectors 112a, 112b and the adapter 116, which rest within the passageway 210. The anchor section 204 is then releasably fitted or fixed between the terminal 102 and the bracket 104. Specifically, the support arm 208 is aligned along a side of the terminal 102, and the fixation arm 206 is positioned along the bottom surface of the terminal. Preferably, the support arm 208 and the fixation arm 206 are positioned substantially flush against the respective sides or surfaces of the terminal 102. The terminal 102 and the cover 218 are then inserted into the bracket 104, such that the fixation arm 206 and the support arm 208 are positionally secured, for example with a friction fit or pinch fit, between the terminal and the bracket. Once the cover 218 and the terminal 102 are releasably secured within the bracket 104, the cover 218 cannot be removed or repositioned. In this respect, unless the terminal 102 is removed from the bracket 104, the cover 218 is fixed in position and inhibits access to the first and second fiber-optic connectors 112a, 112b and the adapter 116.
[0065] Although specific embodiments of the disclosure have been described, numerous other modifications and alternative embodiments are within the scope of the disclosure. For example, any of the functionality described with respect to a particular device or component may be performed by another device or component. Further, while specific device characteristics have been described, embodiments of the disclosure may relate to numerous other device characteristics. Further, although embodiments have been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure is not necessarily limited to the specific features or acts described. Rather, the specific features and acts are disclosed as illustrative forms of implementing the embodiments. Conditional language, such as, among others, can or could, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments could include, while other embodiments may not include, certain features, elements, and/or steps. Thus, such conditional language is not generally intended to imply that features, elements, and/or steps are in any way required for one or more embodiments.