Ingress-protected optical fiber connector assembly

Patent metadata

Field	Value
Publication number	US-11982845-B2
Application number	US-202217678640-A
Country	US
Kind code	B2
Filing date	Feb 23, 2022
Priority date	Feb 24, 2021
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

In an ingress-protected fiber optic connector assembly, an optical fiber plug mates with a receptacle at a bulkhead adapter and an ingress-protected housing assembly couples to the bulkhead adapter to enclose the optical fiber plug. The ingress-protected housing includes an outer housing and a compressible cable seal. The outer housing is rotatable to advance the outer housing, simultaneously compressing the compressible cable seal and fastening the housing assembly to the bulkhead adapter. The outer housing can have a plurality coupling positions at which the cable seal is compressed with a different amount of compression force. A non-sealing cable clamp can transfer tension on the cable to the bulkhead adapter.

First claim

What is claimed is:

1. An optical fiber connector assembly comprising:
an optical fiber plug configured for terminating an optical fiber cable and for mating with a receptacle at a bulkhead adapter; and
a rugged housing assembly configured to couple to the bulkhead adapter and enclose the optical fiber plug mated with the receptacle, the rugged housing assembly comprising a housing configured to mate with the bulkhead adapter, a cable seal configured to be coupled to the optical fiber cable and seal an interface between the housing and the optical fiber cable, and a non-sealing cable clamp configured to clamp onto the optical fiber cable such that movement of the optical fiber cable in relation to the cable clamp is inhibited, the cable clamp configured to be housed within the housing and interface with the housing such that, when the optical fiber plug is mated with the receptacle and the housing is coupled to the bulkhead adapter, tension on the cable is transferred via the cable clamp to the bulkhead adapter and transfer of tension to the optical fiber plug and receptacle is inhibited,
wherein the cable clamp comprises a first keying feature for keying the cable clamp in relation to the housing to inhibit relative rotation between the cable clamp and the housing.

2. The optical fiber connector assembly of claim 1 , wherein
the cable clamp is configured to inhibit twisting of the optical fiber cable in relation to both the optical fiber plug and the housing.

3. The optical fiber connector assembly as set forth in claim 1 , wherein
the first keying feature comprises a longitudinal keyway, the housing comprising a complementary feature comprising a longitudinal key configured to be slidably received in the longitudinal keyway.

4. The optical fiber connector assembly as set forth in claim 1 , wherein
further comprises a nut configured to be threadably tightened onto a rear end portion of the housing to compress the cable seal against the optical fiber cable.

5. The optical fiber connector assembly as set forth in claim 1 , wherein
the cable clamp further comprises a second keying feature for keying the cable clamp in relation to the optical fiber plug to inhibit relative rotation between the cable clamp and the optical fiber plug.

6. The optical fiber connector as set forth in claim 2 , wherein
the cable clamp further comprises a keying feature comprising a non-circular socket and the optical fiber plug comprises a non-circular section configured to be received in the non-circular socket, whereby relative rotation between the cable clamp and the plug is inhibited.

7. The optical fiber connector as set forth in claim 1 , wherein
the cable clamp comprises a first and second clamp shell pieces configured to be coupled together for clamping onto the optical fiber cable.

8. The optical fiber connector as set forth in claim 7 , wherein
the first and second clamp shell pieces are configured to be coupled together for clamping onto any of a plurality of different optical cables within a cable size range.

9. The optical fiber connector as set forth in claim 8 , wherein
the cable size range extends from at least a minimum cable outer diameter of 4.8 mm to at least a maximum cable diameter of 6.0 mm.

10. The optical fiber connector as set forth in claim 7 , wherein
the cable clamp has a front end portion and a rear end portion spaced apart along a longitudinal axis of the optical fiber connector.

11. The optical fiber connector as set forth in claim 10 , wherein
the cable clamp comprises a first set of cable gripping teeth at a first location along the longitudinal axis and a second set of cable gripping teeth at a second location along the longitudinal axis spaced apart from the first location.

12. The optical fiber connector as set forth in claim 11 , wherein
the cable clamp defines a receiving space between the first set of cable gripping teeth and the second set of cable gripping teeth, the receiving space configured to receive deformed cable jacketing when the cable clamp is clamped onto the optical fiber cable.

13. The optical fiber connector as set forth in claim 1 , wherein
the rugged housing assembly is field-installable onto the optical fiber cable.

14. The optical fiber connector as set forth in claim 1 , wherein
the housing includes an inner housing configured to accommodate optical fiber plug and an outer housing configured to make a rotational connection to the bulkhead adapter.

15. The optical fiber connector as set forth in claim 14 , wherein
the inner housing comprises an inner shoulder and an outer shoulder and the outer housing comprises an inner shoulder, when tension is imparted on the cable, the cable configured to engage rearward against the inner shoulder of the inner housing and the outer shoulder of the inner housing configured to engage rearward against the inner shoulder of the outer housing, whereby tension on the cable is transferred from the cable clamp to the inner housing and from the inner housing to the outer housing.

16. An optical fiber connector comprising:
an optical fiber plug configured for terminating an optical fiber cable and for mating with a receptacle at a bulkhead adapter; and
a rugged housing assembly configured to couple to the bulkhead adapter and enclose the optical fiber plug mated with the receptacle, the rugged housing assembly comprising a housing configured to mate with the bulkhead adapter, a cable seal configured to be coupled to the optical fiber cable and seal an interface between the housing and the optical fiber cable, and a non-sealing cable clamp configured to clamp onto the optical fiber cable such that movement of the optical fiber cable in relation to the cable clamp is inhibited, the cable clamp configured to be housed within the housing and interface with the housing such that, when the optical fiber plug is mated with the receptacle and the housing is coupled to the bulkhead adapter, tension on the cable is transferred via the cable clamp to the bulkhead adapter and transfer of tension to the optical fiber plug and receptacle is inhibited,
wherein the rugged housing assembly further comprises:
a collet including a deflectable portion configured for compressing the cable seal onto the optical fiber cable.

17. The optical fiber connector assembly as set forth in claim 16 , further comprising
a nut configured to be threadably tightened onto a rear end portion of the housing to compress the cable seal against the optical fiber cable.

18. The optical fiber connector assembly as set forth in claim 16 , wherein
the cable clamp comprises a first and second clamp shell pieces configured to be coupled together for clamping onto the optical fiber cable.

19. The optical fiber connector assembly as set forth in claim 16 , wherein
the rugged housing assembly is field-installable onto the optical fiber cable.

20. The optical fiber connector assembly as set forth in claim 16 , wherein
the housing includes an inner housing configured to accommodate the optical fiber plug and an outer housing configured to make a rotational connection to the bulkhead adapter.

Assignees

• Senko Advanced Components Inc

Inventors

• Iizumi Kenji
• Takano Kazuyoshi
• Newbury Paul

Classifications

• G02B6/3849 Primary

  using mechanical protective elements, e.g. caps, hoods, sealing membranes (G02B6/3816 takes precedence; provisionally see H01R13/44) · CPC title

• G02B6/3825

  with an intermediate part, e.g. adapter, receptacle, linking two plugs · CPC title

• G02B6/3887

  Anchoring optical cables to connector housings, e.g. strain relief features · CPC title