[특허]Post-tensioning concrete pipe wrap

Post-tensioning concrete pipe wrap 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E04C-005/08 E01D-019/14 E04C-003/34
출원번호	US-0270788 (2014-05-06)
등록번호	US-9574349 (2017-02-21)
발명자 / 주소	Subacchi, Claudio
출원인 / 주소	Hawkeye Pedershaab Concrete Technologies, Inc.
대리인 / 주소	Shuttleworth & Ingersoll, PLC
인용정보	피인용 횟수 : 0 인용 특허 : 31

초록 ▼

A post-tensioning wrap includes a housing having at least one cavity and at least one tendon bonded to the housing. The wrap can be wrapped around the concrete article to equalize compression. Thereafter, a medium is injected into the cavity causing the housing to swell and compression of the concre

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1. A post-tensioning wrap for a concrete article, comprising: a housing comprising a mass of material and comprising at least one cavity within and surrounded around its circumference by the housing extending a longitudinal length of the housing;at least one tendon substantially surrounded by the housing and parallel to the cavity and extending the longitudinal length of the housing; andwherein the post-tensioning wrap is configured to be spirally wrapped around the concrete article and the at least one tendon extends circumferentially around the concrete article, and thereafter, the post-tensioning wrap is operable to have a medium injected into the cavity and flow circumferentially around the concrete article causing the housing to swell and causing compression of the concrete article by the tendon. 2. The post-tensioning wrap of claim 1, and further comprising a plurality of cavities. 3. The post-tensioning wrap of claim 1, and further comprising a plurality of tendons, wherein the plurality of tendons are positioned radially away from the concrete article and the at least one cavity. 4. The post-tensioning wrap of claim 1, wherein the tendon is steel. 5. The post-tensioning wrap of claim 1, and wherein the tendon has a first end and a second end, and the housing has a first end and a second end, wherein the first end of the tendon extends beyond the first end of the housing and the second end of the tendon extends beyond the second end of the housing, and the post-tensioning wrap further comprises a first clamp attached to the first end of the tendon and a second clamp attached to the second end of the tendon to cause the tendon to stretch and compress the concrete article. 6. The post-tensioning wrap of claim 5, wherein the post-tensioning wrap is configured to equalize and provide uniform compression around the concrete article. 7. A post-tensioning wrap for a concrete article, comprising: a housing including a front face and a back face separated from the front face by a longitudinal length of the housing, a least one cavity extending from the front face to the back face and surrounded around its circumference by the housing, wherein the cavity is operable to receive a medium for causing the housing to swell, the housing further including a step on each side of the housing;at least one tendon extending from the front face of the housing parallel with the cavity to the back face of the housing, wherein the at least one tendon is combined to the housing and operable to compress the concrete article; andwherein the post-tensioning wrap is configured to be spirally wrapped around the concrete article with a space between each contiguous position of the housing formed by the step on each side of the housing, the space is configured to receive a low permeable seal to combine each contiguous position of the housing. 8. The post-tensioning wrap of claim 7, and further comprising a plurality of cavities configured to extend circumferentially around the concrete article so that the medium flows circumferentially around the concrete article. 9. The post-tensioning wrap of claim 7, and further comprising a plurality of tendons configured to extend circumferentially around the concrete article, wherein the plurality of tendons are positioned radially away from the concrete article and the at least one cavity. 10. The post-tensioning wrap of claim 7, wherein the tendon is one chosen from steel and a high tensile strength material with an elasticity greater than or equal to concrete. 11. The post-tensioning wrap of claim 7, and wherein the tendon has a first end and a second end, and the housing has a first end and a second end, wherein the first end of the tendon extends beyond the first end of the housing and the second end of the tendon extends beyond the second end of the housing, and the post-tensioning wrap further comprises a first clamp attached to the first end of the tendon and a second clamp attached to the second end of the tendon to cause the tendon to stretch and compress the concrete article. 12. The post-tensioning wrap of claim 11, wherein the post-tensioning wrap is configured to be spirally wrapped around the concrete article to equalize compression around the concrete article. 13. The post-tensioning wrap of claim 7, wherein the housing is made from a low permeable material to protect the tendon.

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