WATERPROOF SEAL FOR ELECTRICAL ASSEMBLIES

• US 20140174822A1
• Filed: 12/09/2013
• Published: 06/26/2014
• Est. Priority Date: 12/11/2012
• Status: Active Grant

• Current Assignee: DSM&T Company Inc.
• Original Assignee: DSM&T Company Inc.
• Inventors: Corona, Sergio
• Granted Patent: US 9,614,361 B2
• Time in Patent Office: Days
• US Class Current: 174/77.R
• CPC Class Codes: H01R 13/5205 Sealing means between cable and housing, e.g. grommet H01R13/5221 takes precedence
• CPC Class Codes: H01R 13/521 Sealing between contact members and housing, e.g. sealing insert
• CPC Class Codes: H01R 4/02 Soldered or welded connections H01R4/625, H01R4/723, H01R12/59 take precedence
• CPC Class Codes: H01R 43/24 Assembling by moulding on contact members
• CPC Class Codes: H02G 15/003 Filling materials, e.g. solid or fluid insulation
• CPC Class Codes: H02G 15/04 Cable-end sealings

Abstract

A waterproof seal for electrical assemblies having conductive wires attached to a metal contact and inserted into a connector body. The conductive wires and metal contact are coated with solder to fill the gaps. The space between the soldered wires and the connector body are filled with an epoxy. The wire insulation and connector body are continuously sealed with a bonding agent. A section of wire insulation and the connector body are encased within an outer plastic jacket overmold.

Claims

1. A waterproof seal for electrical assemblies comprising:

an electrical cable having at least one conductive wire covered with insulation and a terminal end stripped of insulation;

a metal post having a contact section and a juncture section securely connected to said terminal end;

a coating of solder applied to said terminal end to fill the spaces between the terminal end and the juncture section;

a connector body surrounding said metal post;

an epoxy material disposed between said connector body and said juncture section to fill the space therebetween;

a bonding agent covering the connector body and cable insulation; and

an outer plastic jacket overmolded to said connector body, said bonding agent and said cable insulation, wherein said outer thermoplastic jacket prevents moisture from penetrating into said connector body, and wherein said solder and epoxy material occupy spaces within said connector body to prevent water from wicking along the wire.

2. The waterproof seal for electrical assemblies of claim 1, wherein said electrical cable includes two or more conductive wires covered with insulation.

3. The waterproof seal for electrical assemblies of claim 2, wherein the wire comprises a plurality of wire strands, and wherein said coating of solder fills the spaces between the wire strands.

4. The waterproof seal for electrical assemblies of claim 1, wherein the wire comprises solid wire.

5. The waterproof seal for electrical assemblies of claim 1, wherein said solder coating comprising a tin solder coating to electrically and mechanically improve the connection between the wire and the juncture section.

6. The waterproof seal for electrical assemblies of claim 1, wherein the connector comprises a plurality of connectors.

7. The waterproof seal for electrical assemblies of claim 1, wherein the epoxy is selected from the group consisting of a thermoplastic material, a thermoset material, and a hot melt adhesive.

8. The waterproof seal for electrical assemblies of claim 7, wherein the epoxy is a hot melt adhesive (HMA).

9. The waterproof seal for electrical assemblies of claim 1, wherein the bonding agent comprises one-part or two-part epoxy cement.

10. The waterproof seal for electrical assemblies of claim 1, wherein the outer plastic jacket is made from a thermoplastic material.

11. The waterproof seal for electrical assemblies of claim 10, wherein the outer thermoplastic jacket is made from a material selected from the group consisting of polyethylene (PE), polystyrene (PS), polypropylene (PP), polyvinyl chloride (PVC), ethylene propylene diene monomer (EPDM) and Chlorobutyl Rubber.

12. The waterproof seal for electrical assemblies of claim 1, wherein the electrical assembly provides a wicking barrier to prevent fluid from damaging attached equipment.

13. The waterproof seal for electrical assemblies of claim 1, wherein the electrical assembly is configured to be used in an outdoor lighting assembly.

14. The waterproof seal for electrical assemblies of claim 9, wherein the epoxy material is a water-borne epoxy coating.

15. The waterproof seal for electrical assemblies of claim 10, wherein the outer thermoplastic jacket is made from a thermoplastic elastomer (TPE).

16. The waterproof seal for electrical assemblies of claim 1, wherein said terminal ends are sealed within multiple concentric layers of protective materials comprising in order from the center extending radially outward:

(a) a central bundle containing terminal ends, solder and juncture section,

(b) a layer of epoxy consisting of a thermoplastic material or a thermoset material,

(c) the juncture housing consisting of a plastic material,

(d) a bonding agent in the form of a 1- or 2-part cement, and

(e) an outer plastic jacket overmold made from a thermoplastic material, a thermoset material or a thermoplastic elastomer,

wherein the multiple layers of protective materials encase the terminal ends and prevent moisture from penetrating radially inward.

17. The waterproof seal for electrical assemblies of claim 16, wherein said conductive wires are sealed within multiple concentric layers of protective materials comprising in order from the center extending radially outward:

(i) a central bundle containing conductive wire and solder,

(ii) a layer of insulation encasing the conductive wire,

(iii) a bonding agent in the form of a 1- or 2-part cement, and

(iv) an outer plastic jacket overmold made from a thermoplastic material, a thermoset material or a thermoplastic elastomer,

wherein the multiple layers of protective materials encase the conductive wires and prevent moisture from penetrating radially inward.

18. The waterproof seal for electrical assemblies of claim 17, wherein said bonding agent and said outer plastic jacket overmold extend continuously from said juncture housing to said layer of insulation, and wherein said solder extends continuously from said terminal ends to said conductive wire to prevent moisture from wicking axially along said conductive wires.

19. The waterproof seal for electrical assemblies of claim 18, further comprising an electrical device coupled to said connector body, wherein said solder prevents moisture from wicking axially along said conductive wires into said electrical device.