IP Library › Granted Patent US 12,546,955
Granted Patent B2
US 12,546,955 · App. 18/099,058 · Granted Feb 10, 2026

Compact fiber optic connectors having keying portions and locking features

Inventor: Joel Christopher Rosson (Hickory, NC)
Assignee: CORNING RESEARCH & DEVELOPMENT CORPORATION
G02B6/3879G02B6/3825G02B6/3826G02B6/3831G02B6/3851G02B6/3869G02B6/387G02B6/3873G02B6/3885G02B6/3897G02B6/44515G02B6/381G02B6/3821G02B6/3837G02B6/3841G02B6/3843G02B6/3849G02B6/3871G02B6/3887G02B6/3889G02B6/389G02B6/3893G02B6/3895G02B6/4262G02B6/4401G02B6/4446G02B6/4471G02B6/4472G02B6/4477G02B6/4479
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Quick Facts
Patent No.
US 12,546,955
App. No.
18/099,058
Granted
Feb 10, 2026
Kind
B2
Abstract

Fiber optic connectors, cable assemblies and methods for making the same are disclosed. In one embodiment, the optical connector comprises a housing and a ferrule. The housing comprises a longitudinal passageway between a rear end and a front end, and, a part of the rear portion of the housing comprises a round cross-section and a part of the front portion of the housing comprises a non-round cross-section with a transition region disposed between the rear portion and the front portion.

Claims (40)

1 . A fiber optic connector, comprising:

a housing comprising a rear portion defining a rear end, a front portion defining a front end, and a longitudinal passageway extending from the rear end to the front end, wherein a part of the rear portion of the housing comprises a round cross-section with a keying portion and a locking feature integrally formed in the rear portion of the housing for securing the optical mating of the fiber optic connector, and wherein a part of the front portion of the housing comprises a non-round cross-section with a transition region disposed between the rear portion and the front portion;

a ferrule holder disposed within the housing component; and

a ferrule comprising a fiber bore extending from a rear end to a front end, wherein the ferrule is disposed within a portion of the ferrule holder.

2 . The fiber optic connector of claim 1 , wherein the keying portion extends into the transition region.

3 . The fiber optic connector of claim 1 , wherein the keying portion is configured as a female key.

4 . The fiber optic connector of claim 1 , wherein the transition region comprises a threaded portion.

5 . The fiber optic connector of claim 4 , wherein the threaded portion is adjacent to the keying portion.

6 . The fiber optic connector of claim 1 , wherein the locking feature of the housing is disposed about 180 degrees from the keying portion.

7 . The fiber optic connector of claim 1 , wherein the locking feature of the housing is disposed less than 180 degrees from the keying portion.

8 . The fiber optic connector of claim 1 , wherein the locking feature is a ramp with a ledge.

9 . The fiber optic connector of claim 1 , wherein the locking feature is a notch, a groove, a shoulder, or a scallop formed in the housing.

10 . The fiber optic connector of claim 1 , further comprising a cable adapter sized for fitting into a rear opening of the housing.

11 . The fiber optic connector of claim 10 , further comprising a boot attached to the cable adapter.

12 . The fiber optic connector of claim 11 , wherein the boot is overmolded on the cable adapter.

13 . The fiber optic connector of claim 11 , further comprising a sealing element disposed about a portion of the boot.

14 . The fiber optic connector of claim 1 , further comprising a resilient member for biasing the ferrule holder to a forward position.

15 . The fiber optic connector of claim 1 , wherein the housing further comprises one or more latch arms for securing the ferrule holder within the housing.

16 . The fiber optic connector of claim 1 , further comprising an O-ring disposed on the housing.

17 . The fiber optic connector of claim 1 being a portion of a cable assembly comprising a fiber optic cable.

18 . A fiber optic connector, comprising:

a housing comprising a rear portion defining a rear end, a front portion defining a front end, and a longitudinal passageway extending from the rear end to the front end, wherein a part of a rear portion of the housing comprises a round cross-section with a keying portion and a locking feature integrally formed in the rear portion of the housing for securing the optical mating of the fiber optic connector, and wherein a part of a front portion of the housing comprises a non-round cross-section with a transition region disposed between the rear portion and the front portion;

a ferrule holder disposed within the housing component;

a ferrule comprising a fiber bore extending from a rear end to a front end, wherein the ferrule is disposed within a portion of the ferrule holder; and

a fiber optic cable comprising an optical fiber, wherein the optical fiber is disposed in the fiber bore of the ferrule.

19 . The fiber optic connector of claim 18 , wherein the keying portion extends into the transition region.

20 . The fiber optic connector of claim 18 , wherein the keying portion is configured as a female key.

21 . The fiber optic connector of claim 18 , wherein the transition region comprises a threaded portion.

22 . The fiber optic connector of claim 21 , wherein the threaded portion is adjacent to the keying portion.

23 . The fiber optic connector of claim 18 , wherein the locking feature of the housing is disposed about 180 degrees from the keying portion.

24 . The fiber optic connector of claim 18 , wherein the locking feature of the housing is disposed less than 180 degrees from the keying portion.

25 . The fiber optic connector of claim 18 , wherein the locking feature is a ramp with a ledge.

26 . The fiber optic connector of claim 18 , wherein the locking feature is a notch, a groove, a shoulder, or a scallop formed in the housing.

27 . The fiber optic connector of claim 18 , further comprising a cable adapter sized for fitting into a rear opening of the housing.

28 . The fiber optic connector of claim 27 , further comprising a boot attached to the cable adapter.

29 . The fiber optic connector of claim 28 , wherein the boot is overmolded on the cable adapter.

30 . The fiber optic connector of claim 28 , further comprising a sealing element disposed about a portion of the boot.

31 . The fiber optic connector of claim 18 , further comprising a resilient member for biasing the ferrule holder to a forward position.

32 . The fiber optic connector of claim 18 , wherein the housing further comprises one or more latch arms for securing the ferrule holder within the housing.

33 . The fiber optic connector of claim 18 , further comprising an O-ring disposed on the housing.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 19, 2023
From: ROSSON, JOEL CHRISTOPHER
To: CORNING RESEARCH & DEVELOPMENT CORPORATION
Reel/Frame 062426/0567 →
Continuity (7)
Continuation 17704231 · Mar 25, 2022
Continuation 16695025 · Nov 25, 2019
Continuation PCTUS2017064027 · Nov 30, 2017
Provisional Application 62526011 · Jun 28, 2017
Provisional Application 62526018 · Jun 28, 2017
Provisional Application 62526195 · Jun 28, 2017
Related Publication 20230152533A1 · May 18, 2023
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