Fiber optic connector and tool for assembling same

• US 5,265,183 A
• Filed: 07/02/1992
• Issued: 11/23/1993
• Est. Priority Date: 07/02/1992
• Status: Expired due to Fees

• Current Assignee: Molex Incorporated (KOCH Industries Incorporated)
• Original Assignee: Molex Incorporated (KOCH Industries Incorporated)
• Inventors: Feng, David Q., Grois, Igor
• Primary Examiner(s): Healy, Brian
• Application Number:
  US07/908,093
• Time in Patent Office: 509 Days
• Field of Search: 385/77, 385/78, 385/81, 385/84, 385/87, 385/134, 385/139
• US Class Current: 385/78
• CPC Class Codes: G02B 6/3833 Details of mounting fibres in ferrules; Assembly methods; Manufacture
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• 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 6/389 characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type
• CPC Class Codes: G02B 6/3898 Tools, e.g. handheld; Tuning wrenches; Jigs used with connectors, e.g. for extracting, removing or inserting in a panel, for engaging or coupling connectors, for assembling or disassembling components within the connector, for applying clips to hold two connectors together or for crimping tools for cleaning, G02B6/3866; tools in general B25B

Abstract

A fiber optic connector includes a housing having a longitudinal passage extending therethrough and having two ends. A rear end is adapted for attaching a fiber optic cable therethrough. A front end is adapted for having a mating fiber contact plug secured thereto in the passage. The plug has a fiber-receiving passage coextensive with the passage in the housing. A retaining ring is disposed in a transverse groove in the passage in the housing for abutment against the fiber contact plug near the front end thereof to secure the plug in the passage in the housing. A tool is provided for assembling the fiber optic connector. The tool includes a head for receiving and holding the housing of the connector in position with the fiber contact plug and retaining ring insertable into the passage thereof. A pusher apparatus is mounted for movement relative to the head and is engageable with the retaining ring to push the retaining ring into the groove while the connector housing is held by the head of the tool.

Claims

1. In a fiber optic connector which includes a housing having a longitudinal passage extending therethrough and having two ends, a rear end for attaching a fiber optic cable thereto and a front end for having a mating fiber contact plug secured thereto in said passage, the fiber contact plug having a fiber-receiving passage coextensive with the passage in the housing, wherein the improvement comprises a retaining ring disposed in a transverse groove in the passage in the housing for abutment against the fiber contact plug near the front end thereof to secure the plug in the passage in the housing.

2. In a fiber optic connector as set forth in claim 1, including spring means operatively associated between the fiber contact plug and the housing to bias the plug forwardly against the retaining ring.

3. In a fiber optic connector as set forth in claim 1, wherein said housing comprises a one-piece component.

4. In a fiber optic connector as set forth in claim 1, wherein the passage in the housing at said front end thereof is sized for insertion of the fiber contact plug thereinto, said retaining ring being resiliently contractible for insertion into the passage and resiliently expandable into said groove.

6. In a fiber optic connector as set forth in claim 1, including a mating ferrule secured in a recess in a front end of the mating fiber contact plug, the ferrule projecting from the front end of the plug and having a fiber passage coextensive with the passage in the plug.

5. In a fiber optic connector as set forth in claim 5, wherein said retaining ring is generally C-shaped.

7. A fiber optic connector, comprising:

one-piece housing having a longitudinal passage extending therethrough and having two ends, a rear end for attaching a fiber optic cable thereto and a front end;

a mating fiber contact plug in the front end of the passage through the housing the plug having a fiber-receiving passage coextensive with the passage in the housing and including a mating ferrule secured in a recess in a front end of the plug, the ferrule projecting from the front end of the plug and having a fiber passage coextensive with the passage in the plug;

a retaining ring disposed in a transverse groove in the passage in the housing for abutment against the fiber contact plug near the front end thereof to secure the plug in the passage in the housing, the retaining ring being radially resilient whereby the ring is resiliently contractable for insertion into the passage in the housing and resiliently expandable into said groove; and

spring means operatively associated between the fiber contact plug and the housing to bias the plug forwardly against the retaining ring.

8. A tool for assembling a fiber optic connector which includes a housing having a longitudinal passage with a mating fiber contact plug insertable into the passage and a retaining ring insertable into the passage behind the plug for engagement in a groove in the passage to secure the plug in the passage, comprising:

a head for receiving and holding the housing of the connector in position with the fiber contact plug and retaining ring insertable into the passage of the housing; and

a pusher apparatus mounted for movement relative to the head and engageable with the retaining ring to push the retaining ring into the groove while the connector housing is held by the head.

9. The tool of claim 8 wherein said pusher apparatus comprises a piston element of a piston-and-cylinder device, with the head being mounted at one end of a cylinder of the device, the piston element being movable within the cylinder toward the head.

10. The tool of claim 9 wherein the piston element projects from the opposite end of the cylinder for manual manipulation thereof.

11. The tool of claim 10, including a manually graspable handle secured to the piston outside the opposite end of the cylinder.

12. The tool of claim 11 wherein said handle is telescoped over the outside of said opposite end of the cylinder.

13. The tool of claim 8 wherein said head includes coupling means for interengagement with a coupling ring of the fiber optic connector.

14. The tool of claim 13 wherein said coupling means comprises external threads on the head for interengagement with a complementarily internally threaded coupling ring of the fiber optic connector.

15. The tool of claim 8 wherein said head includes a passageway coextensive with the passage in the connector housing when the housing is mounting on the head, and the pusher apparatus is movable axially into the passageway to push the retaining ring therewith into said groove.

16. The tool of claim 15 wherein said passageway is tapered to compress the retaining ring radially whereby the retaining ring can expand into said groove.

17. The tool of claim 16 wherein said head includes a radially outwardly opening slot for insertion therethrough of the retaining ring into the passageway from outside the head.

18. The tool of claim 8 wherein said head includes a passageway coextensive with the passage in the connector housing and a radially outwardly opening slot for insertion therethrough of the retaining ring into the passageway from outside the head.