Strain relief system for a fiber optic connector

• US 5,710,851 A
• Filed: 11/06/1995
• Issued: 01/20/1998
• Est. Priority Date: 11/06/1995
• Status: Expired due to Fees

• Current Assignee: Amphenol Corporation
• Original Assignee: Amphenol Corporation
• Inventors: Repta, Eric, Chen, Wenzong, Walter, Eric, Duda, Donald W.
• Primary Examiner(s): Palmer, Phan T. H.
• Application Number:
  US08/553,895
• Time in Patent Office: 806 Days
• Field of Search: 385/86, 385/76, 385/139, 385/69, 385/75, 385/87, 385/88, 385/100, 385/102, 385/109
• US Class Current: 385/86
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/4478 Bending relief means

Abstract

A strain relief system for a fiber optic connector includes a boot made up of two halves, the halves being fitted together by press-fit pins supported by a flange which also serves increase the rigidity of the boot. The boot is held in place on the cable by using internal ribs at an distal from the connector. The force required to make the ribs hold the boot in place is provided by stretching a standard elastomeric boot over the outer diameter of the section containing the ribs. The system further incorporates a support clip at the connector end to assist the two halves in staying together and further resist lateral bending moments. The outer profile of the support clip can be adapted to fit a variety of different connector configurations, and thus the support clip also serves as an adapter for the strain relief system.

Claims

1. A strain relief system for a connector, comprising:

an essentially rigid boot made up of two halves in the form of discrete members which, when assembled together around a cable, define a central passage through which the cable extends;

means for aligning and securing together the two halves of the boot; and

a clip which fits over one end of the boot and which includes an opening for permitting the clip to be fitted over the cable even after the cable has been terminated to the connector, said clip including a portion arranged to extend into an opening in the connector to hold together said two halves at one end and to retain said one end in said opening, said clip having an outer profile which is arranged to correspond to the inner profile of the connector into which the boot is to be fitted.

2. A strain relief system as claimed in claim 1, wherein the essentially rigid boot is arranged to receive at its distal end an elastomeric boot which is fitted over an outer surface of the distal end to hold together the two halves of the boot at the distal end.

3. A strain relief system as claimed in claim 2, wherein said means for aligning and securing together the two halves comprises, on a first of the two halves, a flange having at least one opening and, on a second of the two halves, a flange having at least one projection, said projection being arranged to be press-fit into said opening.

4. A strain relief system as claimed in claim 3, wherein said clip includes a flange and two arms each having a radiused inner surface corresponding to an exterior surface of said boot, said arms having an outer surface which corresponds in shape to a shape of an interior surface of the connector which receives the arms, said flange defining an inner extent of travel of said clip into the connector.

5. A strain relief system as claimed in claim 4, wherein the essentially rigid boot includes ribs extending into the central passage and arranged to squeeze a jacket of the cable to prevent movement of the boot relative to the cable.

6. A strain relief system as claimed in claim 2, wherein said clip includes a flange and two arms each having a radiused inner surface corresponding to an exterior surface of said boot, said arms having an outer surface which corresponds in shape to a shape of an interior surface of the connector which receives the arms, said flange defining an inner extent of travel of said clip into the connector.

7. A strain relief system as claimed in claim 2, wherein said distal end has a reduced diameter such that when the elastomeric boot is placed over the distal end, the elastomeric boot is flush with an outer surface of the remainder of the boot.

8. A strain relief system as claimed in claim 1 wherein the essentially rigid boot includes ribs extending into the central passage and arranged to squeeze a jacket of the cable to prevent movement of the boot relative to the cable.

9. A strain relief system as claimed in claim 2, further comprising an elastomeric boot which is fitted over an outer surface of a distal end of the essentially rigid boot, said elastomeric boot supplying pressure to cause the ribs to squeeze the cable jacket.

10. A strain relief system as claimed in claim 1, wherein said means for aligning and securing together the two halves comprises, on a first of the two halves, a flange having at least one opening and, on a second of the two halves, a flange having at least one projection, said projection being arranged to be press-fit into said opening.

11. A strain relief system as claimed in claim 1, wherein said boot includes an inner diameter section arranged to fit over a rear end of an inner body in said connector and on which the clip is positioned.

12. A strain relief system as claimed in claim 1, wherein said clip includes a flange and two arms each having a radiused inner surface corresponding to an exterior surface of said boot, said arms having an outer surface which corresponds in shape to a shape of an interior surface of the connector which receives the arms, said flange defining an inner extent of travel of said clip into the connector.

13. A strain relief system as claimed in claim 12, wherein said outer surface of said arms is substantially planar.

14. A strain relief system as claimed in claim 1, wherein said clip is substantially cylindrical in shape.

15. A strain relief system for a connector, comprising:

an essentially rigid boot made up of two halves in the form of discrete members which, when assembled together around a cable, define a central passage through which the cable extends;

means for aligning and securing together the two halves of the boot; and

a clip member which fits over one end of the boot and which includes a portion arranged to fit with an opening in the connector to hold together said two halves at one end and to retain said one end in said opening, said clip having an outer profile which is arranged to correspond to the inner profile of the connector into which the boot is to be fitted.

16. A strain relief system as claimed in claim 15, wherein the essentially rigid boot includes ribs extending into the central passage and arranged to squeeze a jacket of the cable to prevent movement of the boot relative to the cable.

17. A strain relief system as claimed in claim 16, further comprising an elastomeric boot which is fitted over an outer surface of a distal end of the essentially rigid boot, said elastomeric boot supplying pressure to cause the ribs to squeeze the cable jacket.

18. A strain relief system as claimed in claim 15, wherein the essentially rigid boot is arranged to receive at its distal end an elastomeric boot which is fitted over an outer surface of the distal end to hold together the two halves of the boot at the distal end.

19. A strain relief system as claimed in claim 18, wherein said clip member includes a flange and two arms each having a radiused inner surface corresponding to an exterior surface of said boot, said arms having an outer surface which corresponds in shape to a shape of an interior surface of the connector which receives the arms, said flange defining an inner extent of travel of said clip member into the connector.

20. A strain relief system as claimed in claim 18, wherein said distal end has a reduced diameter such that when the elastomeric boot is placed over the distal end, the elastomeric boot is flush with an outer surface of the remainder of the boot.

21. A strain relief system as claimed in claim 15, wherein said means for aligning and securing together the two halves comprises, on a first of the two halves, a flange having at least one opening and, on a second of the two halves, a flange having at least one projection, said projection being arranged to be press-fit into said opening.

22. A strain relief system as claimed in claim 21, wherein said clip member includes a flange and two arms each having a radiused inner surface corresponding to an exterior surface of said boot, said arms having an outer surface which corresponds in shape to a shape of an interior surface of the connector which receives the arms, said flange defining an inner extent of travel of said clip member into the connector.

23. A strain relief system as claimed in claim 22, wherein the essentially rigid boot includes ribs extending into the central passage and arranged to squeeze a jacket of the cable to prevent movement of the boot relative to the cable.

24. A strain relief system as claimed in claim 15, wherein said means for aligning and securing together the two halves comprises, on a first of the two halves, a flange having at least one opening and, on a second of the two halves, a flange having at least one projection, said projection being arranged to be press-fit into said opening.

25. A strain relief system as claimed in claim 15, wherein said boot includes an inner diameter section arranged to fit over a rear end of an inner body in said connector and on which the clip member is positioned.

26. A strain relief system as claimed in claim 15, wherein said clip member includes a flange and two arms each having a radiused inner surface corresponding to an exterior surface of said boot, said arms having an outer surface which corresponds in shape to a shape of an interior surface of the connector which receives the arms, said flange defining an inner extent of travel of said clip member into the connector.

27. A strain relief system as claimed in claim 26, wherein said outer surface of said arms is substantially planar.

28. A strain relief system as claimed in claim 15, wherein said clip member is substantially cylindrical in shape.

29. A strain relief system as claimed in claim 15, wherein an outer profile of said clip member is substantially square.

30. A strain relief system as claimed in claim 15, wherein an outer profile of said clip member is substantially circular.

31. A strain relief system as claimed in claim 15, wherein said clip member has a continuous outer profile.