Patent US4024688A successfully refreshed from Google Patents.
US4024688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete reinforcing bar extension construction and method
Assignee: Individual
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Filing: 1976-03-05
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Granted: 1977-05-24
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Expires: 1996-03-05
Abstract
Abstract This specification discloses a method and construction for joining the ends of concrete reinforcing bars which permits the development of both tension and compression in the bars. A joining member compressively engages adaptor members integrally joined to the ends of the bars and reacts any forces tending to separate the bars, and further permits transmittal of compressive forces therebetween.
Inventors
- 👤 Anthony J. Calini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:01
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/162; E04C5/163; E04C5/165; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5761; Y10T403/5766; Y10T403/5781
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
In combination with a concrete structure cast on site and having first and second contacting concrete sections poured on site at different times, a first rigid reinforcing bar extending in the structure from the first poured section to the other and a second rigid reinforcing bar in the other section and connected to said first bar, an improved joint between said first and second bars comprising an adaptor member rigidly joined to adjacent ends of each of said bars, each of said adaptor members comprising a first end portion of a first diameter connected to the adjacent ends of each of the bars and a second end portion of larger diameter and having a planar end surface, a peripheral surface between said different diameter portions defining a shoulder, a clamping member disposed about said adaptors and engaging said shoulders of said adaptors and rigidly holding said end surfaces in contact whereby the joint between said reinforcing rods reacts all compression and tension forces exerted on said rods.
Claim 2
Dependent Claim
167 words
In combination with a concrete structure cast on site and having first and second contacting concrete sections poured on site at different times, a first rigid reinforcing bar extending in the structure from the first poured section to the other and a second rigid reinforcing bar in the other section and connected to said first bar, an improved joint between said first and second bars comprising an adaptor member rigidly joined to adjacent ends of each of said bars, each of said adaptor members comprising a first end portion of a first diameter connected to the adjacent ends of each of the bars and a second end portion of larger diameter and having a planar end surface, a peripheral surface between said different diameter portions defining a shoulder, a clamping member disposed about said adaptors and engaging said shoulders of said adaptors and rigidly holding said end surfaces in contact whereby the joint between said reinforcing rods reacts all compression and tension forces exerted on said rods.
Claim 3
Dependent Claim
39 words
The structure of claim 1 wherein said clamping member has an internal wall defining a cylindrical cavity, said clamping member cavity provides end surfaces which react against said adaptor shoulders to compressively engage said end surfaces of said adaptors.
Claim 4
Dependent Claim
37 words
The construction of claim 1 wherein said adaptors have a tapered peripheral surface between the end portions thereof and said clamping member has internal tapered surfaces adapted to matingly engage the tapered peripheral surfaces of said adaptors.
Claim 5
Dependent Claim
24 words
The construction of claim 1 wherein said clamping member comprises mating half sections, and means for compressively joining said half sections about said adaptors.
Claim 6
Dependent Claim
16 words
The construction of claim 1 wherein said adaptors have a generally T-shape in longitudinal half section.
Claim 7
Dependent Claim
25 words
The construction of claim 1 wherein at least one rigid shim is disposed between said end surfaces and in surface engagement with said end surfaces.
Claim 8
Independent Claim
145 words
A method of making a reinforced concrete structure comprising abutting sections of concrete poured at different times on site comprising the steps of providing two concrete reinforcing bars, rigidly connecting joining adaptors to at least one end of each bar, said adaptors having a first portion of a first diameter connected to the ends of the bar and a second portion of a larger diameter and having a planar end surface, and a peripheral surface extending between said different diameter portions, pouring one section of concrete with one bar embedded therein with the adaptor end extending therefrom, abutting said end surfaces of said adaptors, applying a joining member about said abutting adaptors which engages said peripheral surfaces of said adaptors and holds said surfaces in contact to connect the second bar to the first and pouring the second section of concrete about said second bar.
Claim 9
Independent Claim
145 words
A method of making a reinforced concrete structure comprising abutting sections of concrete poured at different times on site comprising the steps of providing two concrete reinforcing bars, rigidly connecting joining adaptors to at least one end of each bar, said adaptors having a first portion of a first diameter connected to the ends of the bar and a second portion of a larger diameter and having a planar end surface, and a peripheral surface extending between said different diameter portions, pouring one section of concrete with one bar embedded therein with the adaptor end extending therefrom, abutting said end surfaces of said adaptors, applying a joining member about said abutting adaptors which engages said peripheral surfaces of said adaptors and holds said surfaces in contact to connect the second bar to the first and pouring the second section of concrete about said second bar.
Claim 10
Dependent Claim
41 words
The method of claim 7 wherein the step of connecting includes positioning said first end portion of an adaptor with respect to an end of a bar and passing an electric current axially through said ends to fuse said ends together.
References Cited (Backward Citations)
US760621A
Cited
US1281284A
Cited
US1406229A
Cited
FR553019A
Cited
US2067271A
Cited
US2060548A
Cited
US2326941A
Cited
US2303031A
Cited
US2920475A
Cited
US2845701A
Cited
US3245190A
Cited
US3253332A
Cited
US3562978A
Cited
US3398978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |