Anchorage with tendon sheathing lock and seal

• US 8,065,845 B1
• Filed: 07/18/2008
• Issued: 11/29/2011
• Est. Priority Date: 07/18/2008
• Status: Active Grant

• Current Assignee: Felix L. Sorkin
• Original Assignee: Felix L. Sorkin
• Inventors: Sorkin, Felix L.
• Primary Examiner(s): Katcheves; Basil
• Assistant Examiner(s): KWIECINSKI, RYAN D
• Application Number:
  US12/175,905
• Time in Patent Office: 1,229 Days
• Field of Search: 522/231, 522/234, 522/235, 522/236, 522/237, 522/231.3, 522/231.4, 241/226, 241/15.M
• US Class Current: 52/223.13
• CPC Class Codes: E04C 5/122 the tensile members are anchored by wedge-action
• CPC Class Codes: Y10T 24/3909 Plural-strand cord or rope
• CPC Class Codes: Y10T 24/3996 Sliding wedge

Abstract

A post-tension apparatus has an anchor member having a cavity formed in an interior thereof, a tendon extending through the cavity of the anchor member the has an unsheathed portion and a sheathed portion, an encapsulation affixed to the anchor member and extending thereover that has a trumpet formed at one end of the anchor member, a sheathing lock positioned in the cavity and engaged with the sheathed portion of the tendon, a seal affixed within the trumpet so as to reside in liquid-tight sealing relation with the sheathed portion of the tendon, and wedges recessed in the cavity of the anchor member. The pair of wedges is engaged with the unsheathed portion of the tendon. The sheathing lock is positioned adjacent an end of the pair of wedges.

Claims

1. A post-tension anchorage comprising:

an anchor member having a tapered cavity formed in an interior thereof, said cavity having a wall;

a polymeric encapsulation surrounding said anchor member, said encapsulation having a tubular extension integrally formed therewith, said tubular extension extending outwardly relative to said anchor member;

a sheathing locking means affixed against said wall of said cavity, said sheathing locking means for fixing a position of a sheathing of a tendon extending through said cavity; and

a seal affixed against an interior wall of said tubular extension, said seal extending inwardly therefrom, said seal positioned adjacent an end of said sheathing locking means, said seal being juxtaposed against an end of said anchor member.

2. The post-tension anchorage of claim 1, said seal having an inner wall of a diameter greater than an outer diameter of said sheathing locking means.

3. The post-tension anchorage of claim 1, further comprising:

a tendon having a sheathed portion and an unsheathed portion; and

a sheathing lock interposed between a wall of said cavity and said sheathed portion of said tendon, said seal being in liquid-tight sealing relation with said sheathed portion of said tendon.

4. The post-tension anchorage of claim 1, said seal having a first portion and a second portion, said second portion having an inner diameter less than an inner diameter of said first portion.

5. The post-tension anchorage of claim 1, said seal being of a more pliable material than a material of said tubular extension.

6. The post-tension anchorage of claim 1, said sheathing locking means comprising:

a tubular body having a plurality of locking ribs extending radially inwardly therefrom.

7. A post-tension apparatus comprising:

an anchor member having a cavity formed in an interior thereof;

a tendon extending through said cavity of said anchor member, said tendon having an unsheathed portion and a sheathed portion;

an encapsulation affixed to said anchor member and extending thereover, said encapsulation having a tubular extension integrally formed therewith, said tubular extension extending outwardly relative to an end of said anchor member;

a sheathing lock positioned in said cavity and engaged with said sheathed portion of said tendon; and

a seal affixed within said tubular extension so as to reside in liquid-tight sealing relation with said sheathed portion of said tendon, said seal affixed to an interior wall of said tubular extension in liquid-tight sealing relation therewith, said seal having an end juxtaposed against said end of said anchor member, said seal having a first portion and a second portion, said second portion having an inner diameter less than an inner diameter of said first portion, said inner diameter of said first portion being greater than an outer diameter of said sheathing lock.

8. The post-tension apparatus of claim 7, said trumpet having an inwardly extending shoulder abutting an end of said second portion.

9. The post-tension apparatus of claim 7, said seal being of a more pliable material than a material of said tubular extension.

10. The post-tension apparatus of claim 7, further comprising:

a pair of wedges recessed in said cavity of said anchor member, said pair of wedges being engaged with said unsheathed portion of said tendon, said sheathing lock positioned adjacent an end of said pair of wedges.

11. The post-tension apparatus of claim 10, said cavity having a tapered portion and a generally constant diameter portion, said sheathed portion having an end received in said generally constant diameter portion, said pair of wedges being received in said tapered portion.

12. The post-tension apparatus of claim 11, said sheathing lock affixed within said generally constant diameter portion.

13. The post-tension apparatus of claim 7, said sheathing lock comprising:

a tubular body having a plurality of ribs formed on an inner wall thereof, said plurality of ribs being engaged with said sheathed portion of said tendon.

14. The post-tension apparatus of claim 13, said sheathing lock further comprising:

a shoulder formed on an end thereof, said shoulder abutting an end of said sheathed portion.