Suspended line breakaway device

• US 5,315,064 A
• Filed: 11/08/1991
• Issued: 05/24/1994
• Est. Priority Date: 11/08/1991
• Status: Expired due to Fees

• Current Assignee: William D. Piper
• Original Assignee: William D. Piper
• Inventors: Andrews, Dean D.
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): SOUGH, HYUNG SUB
• Application Number:
  US07/789,581
• Time in Patent Office: 928 Days
• Field of Search: 174/40 TD, 174/40 R, 174/44, 174/45 R, 174/45 TD, 439/155, 439/160, 439/258, 439/474, 439/923, 439/348, 439/350, 439/352, 439/353, 439/354, 403/319, 403/323, 403/361, 403/375, 403/DIG. 3
• US Class Current: 174/40.0TD
• CPC Class Codes: H01R 13/633 for disengagement only in combination with safety switch H01R13/7132
• CPC Class Codes: H01R 13/635 by mechanical pressure, e.g. spring force
• CPC Class Codes: H02G 7/04 Arrangements or devices for relieving mechanical tension
• CPC Class Codes: H02G 7/18 Devices affording mechanical protection in the event of breakage of a line or cable, e.g. net for catching broken lines
• CPC Class Codes: Y10S 403/03 Load-responsive release

Abstract

An improved suspended line cable breakaway device includes a first body portion for connecting to a first end of a support cable and a second body portion for connecting to a second end of the support cable. The first body portion includes resilient fingers having nubs, which are releasably received by slots contained in a cavity wall of the second body portion. A biased spreader, slidably contained in a cavity in the second body portion, is displacable axially along the cavity by an external force along the support cable to urge the nubs outwardly such that the second body portion is disengaged from the first body portion, simultaneously disconnecting component lines of a first end of a suspended line from corresponding component lines of a second end of the suspended line. A shield protects the component line connections, which are spaced internal to the device, from the elements. One embodiment provides a breakaway device for a three-component line and a first modified embodiment provides a breakaway device for a four-component line. A second modified embodiment provides a breakaway device without internal component line connections.

Claims

1. A breakaway device for use with a suspended line supported by a support cable having a first cable end and a second cable end, comprising:

(a) a first body portion having first connecting means for connecting to the first cable end;

(b) a second body portion having second connecting means for connecting to the second cable end;

(c) latching means for engaging said first body portion to said second body portion in a latching engagement;

(d) disengaging means for disengaging said latching means;

(e) a plurality of first component lines, each having a first end embedded in said first body portion;

(f) a plurality of second component lines, each having a second end embedded in said second body portion;

each of said first component lines adapted to establish disengageable connection with a respective one of said second component lines as said first body portion and said second body portion are in said latching engagement;

(g) a plurality of connector cavities, one for each of said first component lines;

(h) a plurality of connector blocks, one disposed in each of said connector cavities;

each said connector block slidable axially along respective said conductor cavity;

each said connector block connected to a respective one of said component lines embedded in said first body portion; and

(i) a plurality of connector springs, one disposed in each of said connector cavities such that respective said connector block is biased toward said second body portion as said first body portion and said second body portion are in said latching engagement.

2. The breakaway device according to claim 1 wherein said latching means comprises:

(a) a plurality of fingers, each having a proximal end and a distal end;

said proximal ends connected to said first body portion such that said fingers extend generally parallel outwardly from said first body portion;

each of said distal ends having a nub extending generally transversely inwardly therefrom; and

(b) a plurality of slots formed in said second body portion;

each of said slots spaced to cooperatively receive a respective one of said nubs as said first body portion and said second body portion are in said latching engagement.

3. The breakaway device according to claim 2, wherein:

(a) said second body portion includes an endwall with a bore therethrough and a cavity;

said cavity formed within said second body portion such that as said nubs are received in said slots, said nubs protrude into said cavity, partitioning said cavity into a first cavity portion and a second cavity portion;

(b) said disengaging means includes;

(1) a pullrod having a spreader end;

said pullrod slidably contained in said endwall bore;

(2) a spreader connected to said pullrod spreader end;

said spreader slidably displaceable axially along said cavity; and

(3) a trigger spring spaced about said pullrod such that said trigger spring biases said spreader away from said endwall; and

(c) said second connecting means includes a hook end secured to said pullrod;

said hook end extending outwardly from said second body portion.

4. The breakaway device according to claim 3, wherein:

said first body portion has a registration end such that said second body portion is slidably telescoped over said registration end as said first body portion and said second body portion are in said latching engagement.

5. The breakaway device according to claim 1 including:

shield means for shielding said disengageable connections.

6. The breakaway device according to claim 2, including:

(a) each of said nubs having a rounded leading edge and a tapered trailing edge; and

(b) a plurality of grooves, each receiving a respective one of said fingers as said first body portion and said second body portion are in said latching engagement.

7. The breakaway device according to claim 1, wherein:

said first connecting means include a tab with a throughbore extending outwardly from said first body portion.

8. The breakaway device according to claim 1 including:

a plurality of prongs, one connected to each of said second component lines embedded in said second body portion;

said prongs protruding from said second body portion such that each of said prongs establishes connection with a different one of said connector blocks as said first body portion and said second body portion are in said latching engagement.

9. The breakaway device according to claim 8 wherein:

each said connector block has a partial bore in an outwardly facing side thereof for receiving a respective one of said prongs.

10. The breakaway device according to claim 1 wherein:

the number of said first component lines and said second component lines is three.

11. The breakaway device according to claim 1 wherein:

the number of said first component lines and said second component lines is four.

12. The breakaway device according to claim 1 wherein:

said disengageable connection provides electrical communication between each of said first component lines and a respective one of said second component lines.

13. The breakaway device according to claim 1 wherein:

said disengageable connection provides generally fluid-tight communication between each of said first component lines and a respective one of said second component lines.

14. A breakaway device for use with a suspended line supported by a support cable having a first cable end and a second cable end, comprising:

(a) a first body portion having first connecting means for connecting to the first cable end;

(b) a second body portion having second connecting means for connecting to the second cable end;

(c) a plurality of circumferentially spaced slots in said second body portion, each slot terminating at an edge formed on said second body portion;

(d) a plurality of flexible fingers projecting from said first body portion, each finger terminating in a tip;

(e) a nub projecting inwardly on the tip of each finger, said nubs fitting through the respective slots and hooking onto the corresponding edges of the slots when the first and second body portions are assembled, the engagement between the nubs and edges acting to latch the first and second body portions together; and

(f) a spreader carried on said second body portion and acting against said nubs in a manner to force the nubs outwardly through the slots to disengage the nubs from the edges of the slots when said first and second cable ends are pulled apart with a force applied at a predetermined level, whereby disengagement of the nubs from the edges of the slot releases said first and second body portions from one another.

15. The breakaway device according to claim 14, including:

a plurality of grooves on said second body portion adjacent to the respective slots at locations to receive said fingers in the grooves when said first and second body portions are latched together.