Corrosion protection tube for a post-tension anchor system

• US 5,839,235 A
• Filed: 08/20/1997
• Issued: 11/24/1998
• Est. Priority Date: 08/20/1997
• Status: Expired due to Term

• Current Assignee: Felix L. Sorkin
• Original Assignee: Felix L. Sorkin
• Inventors: Sorkin, Felix L.
• Primary Examiner(s): Mai, Lanna
• Application Number:
  US08/914,989
• Time in Patent Office: 461 Days
• Field of Search: 52/223.13, 52/223.14, 52/226, 52/228, 52/225, 52/230, 52/231, 24/122.6, 264/228
• US Class Current: 52/223.13
• CPC Class Codes: E04C 5/10 Ducts
• CPC Class Codes: E04C 5/12 Anchoring devices tools or methods for tensioning in situ E04G21/12
• CPC Class Codes: Y10T 24/3909 Plural-strand cord or rope

Abstract

A post-tension anchor system including an encapsulated anchor having a trumpet portion extending outwardly therefrom, a tendon affixed to the encapsulated anchor and extending through the trumpet portion, and a tubular body affixed in snap-fit engagement with the trumpet portion so as to extend outwardly from the trumpet portion in axial alignment therewith. The tubular body has a seal at an end opposite the trumpet portion so as to form a generally liquid-tight seal with an exterior surface of the tendon. The tubular body has a notch formed on an exterior surface thereof. The trumpet portion has an inwardly extending surface. The inwardly extending surface engages the notch so as to form a generally liquid-tight connection. A collar extends around the tubular body on a side of the notch so as to be in close relationship to the end of the trumpet portion.

Claims

1. A corrosion protection tube for connection to a trumpet portion of an encapsulated anchor of a post-tension anchor system comprising:

a tubular body have a notch means extending therearound, said notch means for snap-fit engagement with a protrusion extending from the trumpet portion when said tubular body is attached on the trumpet portion, said tubular body body having open ends and a closed interior; and

a collar formed on said tubular body so as to extend outwardly of an exterior surface of said tubular body adjacent to said notch means.

2. The tube of claim 1, said notch means comprising a notch formed so as to be indented inwardly of said exterior surface.

3. The tube of claim 2, said end being tapered so as to have a wide diameter proximal said notch and a narrow diameter distal said notch.

4. The tube of claim 3, said tubular body having an end at said narrow diameter.

5. The tube of claim 1, said tubular body having an end for placement interior of the trumpet portion, said collar positioned on a side of said notch opposite said end.

6. The tube of claim 1, further comprising:

a seal means affixed to an end of said tubular body distal said notch means, said seal means for forming a generally liquid-tight seal between said tubular body and a tendon of the post-tension anchor system.

7. The tube of claim 6, said tubular body having an outwardly extending edge adjacent said end of said tubular body, said seal means further comprising:

an elastomeric seal having an interior surface abutting said outwardly extending edge, said elastomeric seal having a portion extending over said end and extending into an interior of said tubular body.

8. The tube of claim 1, said notch means comprising an abutment surface formed on an interior of said tubular body adjacent an end of said tubular body, said abutment surface engagable with a protrusion extending outwardly of an exterior surface of said trumpet portion.

9. A post-tension anchor system comprising:

an encapsulated anchor having a trumpet portion extending outwardly therefrom;

a tendon affixed to said encapsulated anchor and extending through said trumpet portion; and

a tubular body affixed in snap-fit engagement with said trumpet portion so as to extend outwardly from said trumpet portion in axial alignment therewith, said tubular body extending around said tendon, said tubular body having a notch formed on an exterior surface thereof, said trumpet portion having an inwardly extending surface, said inwardly extending surface engaging said notch, said tubular body having open ends and a closed interior, said tubular body having one end extending into said trumpet portion, said one end being continuously tapered so as to have a wide end proximal said notch and a narrow end distal said notch.

10. The system of claim 9, said tubular body having a seal means at an end opposite said trumpet portion, said seal means for forming a generally liquid-tight seal with an exterior surface of said tendon.

11. The system of claim 10, said tubular body having an end extending into said trumpet portion, said tubular body having a collar extending therearound on a side of said notch opposite said end, said collar having a diameter greater than a diameter of said tubular body.

12. The system of claim 11, said collar being in abutment with an end of said trumpet portion.

13. The system of claim 9, said tubular body having a portion with an outer diameter less than an inner diameter of said trumpet portion, said portion of said tubular body being positioned within said trumpet portion in generally liquid-tight engagement therewith.

14. The system of claim 9, said tendon having a sheathed portion and an unsheathed portion, said unsheathed portion connected to said anchor and extending through said trumpet portion, said tubular body extending over said unsheathed portion so as to have an end overlying said sheathed portion of said tendon.

15. The system of claim 14, said tubular body having a seal means at an end overlying said sheathed portion, said seal means for forming a liquid-tight seal between said tubular body and said sheathed portion of said tendon.

16. The system of claim 15, said seal means comprising an elastomeric seal, said tubular body having an outwardly extending edge adjacent said end of said tubular body, said elastomeric seal having an interior surface engaging said outwardly extending edge, said elastomeric seal extending over said end of said tubular body and into an interior of said tubular body so as to be in surface-to-surface contact with said sheathed portion.

17. The system of claim 9, said encapsulated anchor being an intermediate anchorage of the post-tension anchor system, said encapsulated anchor having a tubular section extending outwardly therefrom on an end opposite said trumpet portion, said tubular section being in axial alignment with said trumpet portion, the system further comprising:

a tubular connection in snap-fit engagement with said tubular section so as to extend outwardly therefrom, said tendon extending through an interior of said tubular connector.

18. The system of claim 17, said tubular connector having an abutment edge formed thereon, said tubular section having an inwardly extending annular surface, said abutment edge engaging said annular surface, said tubular connector having a portion extending interior of said tubular section.