Crossbox protection cap

• US 5,083,940 A
• Filed: 11/04/1988
• Issued: 01/28/1992
• Est. Priority Date: 11/04/1988
• Status: Expired due to Term

• Current Assignee: Raychem Limited (TE Connectivity Limited)
• Original Assignee: Raychem Limited (TE Connectivity Limited)
• Inventors: Larson, Bruce, Dubrow, Robert S., Dawes, Keith
• Primary Examiner(s): Pirlot, David L.
• Application Number:
  US07/267,065
• Time in Patent Office: 1,180 Days
• Field of Search: 427/44, 427/358, 156/224, 174/76, 174/DIG. 8, 428/220, 428/447, 439/519-523, 439/276, 439/932, 439/200, 439/204, 439/892, 29/877, 29/878, 523/455, 523/466, 524/506, 524/268, 524/269
• US Class Current: 439/521
• CPC Class Codes: H01R 13/5216 characterised by the sealing material, e.g. gels or resins
• CPC Class Codes: H01R 4/70 Insulation of connections end caps H01R4/22

Abstract

A gel and container means capable of protecting a binding post and drop wire from moisture and corrosion is provided which will effectively prevent the exposure of the drop wire and binding post cap and screw from moisture and corrosive atmospheres without the need for a pressure maintaining means other than the combination of the cap and gel. The pressure of the gel is maintained on the binding post through the extraction of plasticizers from the container means causing a shrinkage.

Claims

1. A corrosion protection device comprising:

a gel containing means for containing a gel; and

a gel contained therein, said gel and gel containing means cooperate in combination to cause a migration of plasticizer from the gel containing means and into the gel which results in a shrinkage of the gel containing means upon pressing of the gel containing means onto a substrate, said shrinkage is sufficient to cause the gel containing means to maintain the gel in contact with the substrate under compression.

2. The device according to claim 1 wherein the gel containing means has a nonconforming shape to the shape of the substrate.

3. The device according to claim 2 wherein the gel is selected from a urethane gel or a silicone gel or mixtures thereof.

4. The device according to claim 2 wherein the gel containing means is plastic.

5. The device according to claim 4 wherein the plastic is a flexible highly plasticized polyvinylchloride.

6. The device according to claim 4 wherein the gel containing means is plastisol.

9. The device according to claim 1 wherein the gel is a cured gel having a cone penetration of about 50 to about 350 (10-1 mm) with an ultimate elongation in excess of about 100%, the gel including a source of a finely divided matrix containing a plasticizer therein with the gel.

10. The device according to claim 9 wherein the gel has a cone penetration of about 200 to about 300 (10-1 mm) with an ultimate elongation in excess of about 200%.

11. The device according to claim 9 wherein the matrix if from about 0.0001 grams to about 0.5 grams per gram of gel.

12. The device according to claim 11 wherein the matrix has a particle size of from about 0.0001 microns to about 100 microns.

13. The device according to claim 12 wherein the matrix containing a plasticizer is plastisol.

14. The device according to claim 13 wherein the gel is a silicone gel.

15. The device according to claim 14 wherein the silicone gel is a poly-di-methyl siloxane gel.

7. The device according to claim 7 wherein the gel is a silicone gel.

8. The device according to claim 7 wherein the gel is a poly-di-methyl siloxane gel.

16. A method of maintaining a gel containing means for containing a gel in contact with a substrate to be protected comprising:

curing a gel within a gel containing means;

placing the gel containing means in contact with the substrate to be protected with a sufficient initial force to cause a displacement of the gel within the containing means sufficient to cover an area of the containing means greater than prior to placement over the substrate wherein said gel extracts an ingredient from the containing means whereby the containing means undergoes a shrinkage to maintain the gel within the containing means in contact with the substrate.

17. The method according to claim 16, wherein the cured gel has a cone penetration of about 50 to about 350 (10^- mm) with an ultimate elongation in excess of 100%.

18. The method according to claim 16 wherein the initial force is less than the amount of force capable of causing a loss of gel out of the containing means.

19. The method according to claim 18 further comprising adding a source of plasticizer within a support matrix into the gel.

20. The method according to claim 19, wherein the cured gel has a cone penetration of from about 50 to about 350 (10^- mm) with an ultimate elongation in excess of 100%.