Corrosion protection seal for an anchor of a post-tension system

• US 6,817,148 B1
• Filed: 08/28/2000
• Issued: 11/16/2004
• Est. Priority Date: 08/28/2000
• Status: Expired due to Term

• Current Assignee: Felix L. Sorkin
• Original Assignee: Felix L. Sorkin
• Inventors: Sorkin, Felix L.
• Primary Examiner(s): Johnson, Blair M.
• Application Number:
  US09/649,157
• Time in Patent Office: 1,541 Days
• Field of Search: 522/231.3, 522/231.4, 241/226
• US Class Current: 52/223.13
• 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 anchor body having a polymeric encapsulation extending therearound in which the encapsulation has a tubular portion integrally formed therewith and extending outwardly from the anchor body. A tendon is affixed within a wedge-receiving cavity of the anchor body. The tendon has a sheathed portion and an unsheathed portion. A seal member is affixed to an end of the tubular portion opposite the anchor body. The seal member has a portion extending around the sheathed portion of the tendon in generally liquid-tight relationship therewith. The tubular portion has an interlock area extending therearound for engaging an interior surface of the seal member. The tubular portion has a length of generally greater than four inches extending outwardly of the anchor body. A plurality of wedges are positioned in interference-fit relationship with the unsheathed portion of the tendon within the wedge-receiving cavity of the anchor body.

Claims

1. A post-tension anchor system comprising:

an anchor body having a polymeric encapsulation extending therearound, said encapsulation having a tubular portion integrally formed therewith and extending outwardly from one end of said anchor body, said anchor body having a wedge-receiving cavity formed therein, said tubular portion having an interlock area extending around an exterior surface thereof, said interlock area comprising a protrusion extending outwardly and around said tubular portion adjacent an end of said tubular portion opposite said anchor body;

a tendon affixed within said wedge-receiving cavity of said anchor body, said tendon having a sheathed portion and an unsheathed portion;

a seal member affixed to an end of said tubular portion opposite said anchor body, said seal member extending around said sheathed portion of said tendon in generally liquid-tight relationship therewith, said protrusion engaging an indentation formed on an interior surface of said seal member, said seal member comprising;

a first annular portion extending around said tubular portion at said end; and

a second annular portion extending outwardly from said first annular portion, said second annular portion being in liquid-tight relationship with said sheathed portion of said tendon, said second annular portion having a diameter smaller than a diameter of said first annular portion, said second annular portion extending outwardly of said end of said tubular portion, said seal member being formed of an elastomeric material, said tubular portion having a length of greater than four inches extending outwardly of said anchor body; and

a plurality of wedges in interference-fit relationship with said unsheathed portion of said tendon within said wedge-receiving cavity of said anchor body.

2. An anchor system for a post-tension anchorage system comprising:

an anchor body having a polymeric encapsulation extending thereover, said encapsulation having a tubular portion integrally formed therewith and extending outwardly from one end of said anchor body for greater than four inches, said anchor body having a wedge-receiving cavity formed therein, said tubular portion having an indentation extending therearound adjacent an end of said tubular portion opposite said anchor body, said tubular portion being in co-axial longitudinal alignment with said wedge-receiving cavity;

a tendon affixed within said wedge-receiving cavity of said anchor body, said tendon extending through said tubular portion, said tendon having a sheathed portion and an unsheathed portion, only said sheathed portion extending outwardly of an end of said tubular portion opposite said anchor body; and

a seal member affixed to an end of said tubular portion opposite said anchor body, said seal member having an interior opening of a diameter less than a diameter of said wedge-receiving cavity, said seal member comprising;

first annular portion extending around said tubular portion at said end, said first annular portion having a protrusion extending inwardly from an inner wall of said first annular portion, said protrusion received by said indentation of said tubular portion; and

a second annular portion extending from said first annular portion, said second annular portion having a diameter smaller than a diameter of said first annular portion, said second annular portion extending outwardly of said end of said tubular portion.