US3877113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring system used in post stressing concrete
Assignee: Individual
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Filing: 1974-02-06
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Granted: 1975-04-15
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Expires: 1994-02-06
Abstract
Abstract The specification discloses an anchor for post-tensioning a cable in a body of set concrete. The anchor comprises an elongated cylindrical tapered case having an internal bore tapering from a large diameter to a small diameter. An imbedding flange is formed around the outer periphery of the case and a cylindrical insert is fitted securely within the small bore opening in the case. The insert is adapted with a circular flange extending radially outwardly so that the insert is prevented from moving completely into the case. The insert receives the cable in sealing relationship to prevent the ingress of moisture and unset concrete into the case through the small end. Wedge segments, slidably mounted in the case, mate with the tapered bore in the case and have a serrated surface on their inner surface for gripping the cable. A collapsible sealing cap encircles the larger end of the case. In an alternate embodiment, the cap walls are formed with accordian pleats which collapse when compressed. A cylindrical flange is affixed to the sealing cap and defines an opening therein; the flange extends to the outside of the cap and receives the cable in a sealing relationship to prevent the ingress of moisture and unset concrete into the case through the large ends. A coil spring is positioned between the wedge segments and the sealing cap maintaining the wedge segments in assembled relationship with the tapered bore within the case.
Inventors
- 👤 Cesar D Reyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:48
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/122; F; F16; F16G; F16G11/00; F16G11/10; F16G11/105; F16G11/106; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3996; Y10T403/00; Y10T403/70; Y10T403/7062; Y10T403/7064; Y10T403/7066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
244 words
An anchor for tensioning a cable in a body of set concrete comprising: an elongated cylindrical case tapering in diameter from a large end to a small end and having a bore therethrough tapering in diameter from a large opening to a small opening; an imbedding flange formed around the outer periphery of said case; a cylindrical insert adapted to fit securely within the small bore opening in said case, said insert being adapted to receive said cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into said case through the small end; wedge segments slidably mounted in said case, said segments being contoured on their outer surface to mate with the tapered bore in said case and having a serrated surface on their inner surface for gripping the cable; a collapsible sealing cap encircling the larger end of said case and having an opening therein which coaxially aligns with the axis of said case when said cap is properly fitted on said case; a cylindrical flange as an integral part of said sealing cap and defining the opening therein, said flange extending to the outside of said cap and adapted to receive said cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into said case througH the large end; and flexible means positioned between said wedge segments and said sealing cap maintaining said wedge segments in assembled relationship with the tapered bore within said case.
Claim 2
Dependent Claim
244 words
An anchor for tensioning a cable in a body of set concrete comprising: an elongated cylindrical case tapering in diameter from a large end to a small end and having a bore therethrough tapering in diameter from a large opening to a small opening; an imbedding flange formed around the outer periphery of said case; a cylindrical insert adapted to fit securely within the small bore opening in said case, said insert being adapted to receive said cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into said case through the small end; wedge segments slidably mounted in said case, said segments being contoured on their outer surface to mate with the tapered bore in said case and having a serrated surface on their inner surface for gripping the cable; a collapsible sealing cap encircling the larger end of said case and having an opening therein which coaxially aligns with the axis of said case when said cap is properly fitted on said case; a cylindrical flange as an integral part of said sealing cap and defining the opening therein, said flange extending to the outside of said cap and adapted to receive said cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into said case througH the large end; and flexible means positioned between said wedge segments and said sealing cap maintaining said wedge segments in assembled relationship with the tapered bore within said case.
Claim 3
Dependent Claim
30 words
The anchor in claim 1 wherein said cylindrical insert further comprises a flange attached thereto extending radially outwardly so that the insert is prevented from moving completely into said case.
Claim 4
Dependent Claim
23 words
The anchor in claim 1 wherein the walls of said collapsible sealing cap are characterized by inner accordian pleats which collapse when compressed.
Claim 5
Dependent Claim
52 words
The anchor in claim 1 wherein said case further comprises an outwardly extending flange around said large end and said sealing cap comprises a corresponding inwardly extended flange whereby the two flanges form a sealing engagement in an overlapping relationship to effect a positive seal around the large end of said case.
Claim 6
Dependent Claim
192 words
An anchor for tensioning a cable in a body of set concrete comprising: an elongated cylindrical case tapering in diameter from a large end to a small end and with a bore therethrough tapering in diameter from a large opening to a small opening; wedge segments slidably mounted in said case; a cap having an opening therein which coaxially aligns with the axis of the case sealing the larger end of said case and characterized by accordian pleats which collapse when compressed; means between the wedge segments and the sealing cap for engaging the wedge segments against the cable; a cylindrical insert adapted to fit securely within the small bore opening in the case, said insert being adapted to receive the cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into the case through the small end; and a cylindrical flange as an integral part of said sealing cap and defining the opening therein, said flange extending to the outside of said cap and adapted to receive said cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into the case through the large end.
Claim 7
Dependent Claim
192 words
An anchor for tensioning a cable in a body of set concrete comprising: an elongated cylindrical case tapering in diameter from a large end to a small end and with a bore therethrough tapering in diameter from a large opening to a small opening; wedge segments slidably mounted in said case; a cap having an opening therein which coaxially aligns with the axis of the case sealing the larger end of said case and characterized by accordian pleats which collapse when compressed; means between the wedge segments and the sealing cap for engaging the wedge segments against the cable; a cylindrical insert adapted to fit securely within the small bore opening in the case, said insert being adapted to receive the cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into the case through the small end; and a cylindrical flange as an integral part of said sealing cap and defining the opening therein, said flange extending to the outside of said cap and adapted to receive said cable in sealing relationship thereby preventing the ingress of moisture and unset concrete into the case through the large end.
Claim 8
Dependent Claim
30 words
The anchor in claim 5 wherein said cylindrical insert further comprises a flange attached thereto extending radially outwardly so that the insert is prevented from moving completely into the case.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |