Monolithic optical fiber coupler including sleeve with flexible flap

• US 5,737,464 A
• Filed: 08/31/1995
• Issued: 04/07/1998
• Est. Priority Date: 08/31/1995
• Status: Expired due to Fees

• Current Assignee: Siecor Technology, Inc. (Corning Incorporated)
• Original Assignee: Siecor Corporation (Corning Incorporated)
• Inventors: Underwood, David T., de Jong, Mike
• Primary Examiner(s): Bovernick, Rodney B.
• Assistant Examiner(s): Sanghavi, Hemang
• Application Number:
  US08/521,700
• Time in Patent Office: 950 Days
• Field of Search: 385/56, 385/58, 385/69, 385/66, 385/60, 385/77, 385/78, 385/70, 385/88, 385/92
• US Class Current: 385/72
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3874 using tubes, sleeves to align ferrules
• CPC Class Codes: G02B 6/3877 Split sleeves
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on

Abstract

A coupler is provided for coupling standard optical fiber connectors of the type with a ferrule extending from a connector housing. The coupler has a monolithic ferrule sleeve that defines a passageway configured for receiving and operatively aligning the ferrules from the two connectors to be coupled. A first latch portion is spaced from and generally parallel with the ferrule sleeve. A midpoint of the first latch portion is connected to a midpoint of the ferrule sleeve. A second latch portion is similarly connected to the ferrule sleeve opposite the first latch portion. The first and second latch portions are configured for engaging the connector housings of the connectors to be coupled.

Claims

1. A monolithic coupler for coupling optical fiber connectors, each optical fiber connector having a ferrule extending from a connector housing, the coupler comprising:

(a) a sleeve portion having a generally sleeve-shaped wall with a first end and a second end opposite thereto, the wall defining a passageway extending there through in a longitudinal direction from the first end to the second end, the passageway sized for receiving and operatively aligning the ends of each of each of the ferrules in an end to end abutting relation at a point in the passageway, the sleeve portion further defines at least one cut-out through the wall so as to create at least one flexible flap in the wall that bears against the ferrules when the ferrules are disposed in the passageway of the sleeve portion;

(b) a first spacer portion and a second spacer portion extending from opposite sides of the sleeve portion at a midpoint along the sleeve portion and in a direction perpendicular to the longitudinal direction of the sleeve portion;

(c) a first latch portion extending in opposite directions from the first spacer portion so as to be spaced from and extending generally parallel with the sleeve portion, the first latch portion having a first end with a first projection and a second end opposite thereto with a second projection, the first and second projections engageable with the connector housings; and

(d) a second latch portion extending in opposite directions from the second spacer portion so as to be spaced from and extending generally parallel with the sleeve portion, the second latch portion having a first end with a third projection and a second end opposite thereto with a fourth projection, the third and fourth projections engageable with the connector housings.

2. The coupler of claim 1 wherein at least a portion of the sleeve portion is flexible radially outward so as to be expandable radially outward when the ferrules are inserted in such portion of the sleeve portion.

3. The coupler of claim 2 wherein said first cut-out through the wall extends along a first circumferential length, a longitudinal length and then a second circumferential length so as to define said flexible flap in the wall, the first and second circumferential lengths spaced from the first and second ends of the sleeve portion, respectively, and wherein the cross-section of the passageway along the flexible flap is smaller than the cross-section of the passageway at the first end and second end of the sleeve portion.

4. The coupler of claim 3 wherein the sleeve portion further defines a second cut-out through the wall so as to create a second flexible flap in the wall, along which the cross-section of the passageway is reduced.

5. The coupler of claim 3 wherein the interior of the flexible flap has a flat extending along the length of the flexible flap for aligning the ferrule in the passageway.

6. The coupler of claim 2 wherein the sleeve portion defines a slot through the wall extending from the first end to the second end of the sleeve portion.

7. The coupler of claim 1 wherein the sleeve shaped wall is solid.

8. The coupler of claim 1 further comprising a first flange portion extending out from the first latch portion opposite the first spacer portion, and a second flange portion extending out from the second latch portion opposite the second spacer portion.

9. A coupler for connecting optical fiber connectors, each optical fiber connector having a ferrule disposed in a housing, the coupler comprising:

(a) a monolithic ferrule sleeve having an interior and an exterior, the interior configured for receiving and axially aligning the ends of each of the ferrules in an end to end abutting relation at a point in the interior of the ferrule sleeve, the monolithic ferrule sleeve defines at least one cut-out there through so as to create at least one flexible flap in the ferrule sleeve that bears against the ferrules when the ferrules are disposed in the ferrule sleeve;

(b) a first latch portion spaced from and extending substantially parallel with the ferrule sleeve, a midpoint of the first latch portion connected to a midpoint of the exterior of the ferrule sleeve;

(c) a second latch portion spaced from and extending substantially parallel with the ferrule sleeve, a midpoint of the second latch portion connected to a midpoint of the exterior of the ferrule sleeve; and

(d) the first and second latch portions configured to be engageable with the connector housings.

10. The coupler of claim 9 wherein at least a portion of the ferrule sleeve is flexible radially outward so as to be expandable radially outward when the ferrules are inserted in such portion of the ferrule sleeve.

11. The coupler of claim 9 wherein the ferrule sleeve and the first and second latch portions are all cast as one piece.

12. The coupler of claim 9 wherein the ferrule sleeve is rigid in the radially outward direction.