WO2023098965 - REINFORCING BAR COUPLER BASED ON DOUBLE ACTION OF SCREW ELEMENTS
National phase entry:
Publication Number
WO/2023/098965
Publication Date
08.06.2023
International Application No.
PCT/EG2021/000039
International Filing Date
01.12.2021
Title **
[English]
REINFORCING BAR COUPLER BASED ON DOUBLE ACTION OF SCREW ELEMENTS
[French]
COUPLEUR DE BARRES DE RENFORCEMENT BASÉ SUR UNE DOUBLE ACTION D'ÉLÉMENTS DE VIS
Applicants **
AL-TUHAMI, Al-Tuhami Abuzeid
2nd Floor,Building 28, local Plot33, 2nd district, Obour City,
Qaliobia, EG
AL-TUHAMI, Ahmed yaseen Al-Tuhami Abuzeid
2nd Floor,Building 28, local Plot33, 2nd district, Obour City,
Qaliobia, EG
Inventors
AL-TUHAMI, Al-Tuhami Abuzeid
2nd Floor,Building 28, local Plot33, 2nd district, Obour City,
Qaliobia, EG
AL-TUHAMI, Ahmed yaseen Al-Tuhami Abuzeid
2nd Floor,Building 28, local Plot33, 2nd district, Obour City,
Qaliobia, EG
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
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International Searching Authority |
EPO
* |
| Applicant's Legal Status |
Natural Person
* |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter II
* |
| * | |
| * | |
| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing | 888 | |
| EPO | Filing, Examination | 3573 | |
| Japan | Filing | 594 | |
| South Korea | Filing | 482 | |
| USA | Filing, Examination | 2710 |
Total: 8247 USD
The term for entry into the National Phase has expired. This quotation is for informational purposes only
Abstract[English]
Most of the reinforcing bars used in reinforced concrete industry have outwardly circumferential ribs. The common form of these ribs, are the inclined shape ribs. In addition, a pair of longitudinal ribs may be formed as a result of the manufacturing process. Despite the importance of these ribs in increasing the bond between it and the surrounding concrete, it represents one of the most important obstacles in finding a strong and small size mechanical coupler to connect two or more bar ends. These ribs significantly reduce the contact surfaces needed to transfer loads and stresses between the reinforcing bars and the inner surface of the mechanical coupler. Presented herein, apparatuses and methods for coupling reinforcing bars based on double action of screw elements and bar end threading without enlargement or undercut. The rebar outwardly circumferential ribs and the inner surface of the mechanical coupler tubular sleeve, are machined to form an interlock between them which significantly enhance the coupling strength. When the screw elements are tightening against a reinforcing bar, the machining that done, make the circumferential surface of the rebar end between the ribs not only in direct contact but also dig into the inner surface of the mechanical coupler and does eliminate the spaces between them. Means for coupling and gripping the tubular sleeve body over the ends reinforcing bar ends.[French]
La plupart des barres de renforcement utilisées dans l'industrie du béton armé présentent des nervures circonférentielles externes. La forme commune de ces nervures est inclinée. De plus, deux nervures longitudinales peuvent se former lors du processus de fabrication. Malgré l'importance de ces nervures pour augmenter leur liaison avec le béton environnant, elles représentent l'un des obstacles les plus importants de la recherche d'un coupleur mécanique robuste et de petite taille pour relier deux extrémités de barres ou plus. Ces nervures réduisent nettement les surfaces de contact nécessaires pour transférer des charges et des contraintes entre les barres de renforcement et la surface interne du coupleur mécanique. L'invention présente ici des appareils et des procédés d'accouplement de barres de renforcement basés sur une double action d'éléments de vis et sur un filetage d'extrémité de barres sans agrandissement ni dégagement. Les nervures circonférentielles externes de barres d'armature et la surface interne du manchon tubulaire de coupleur mécanique sont usinées pour former un interverrouillage, ce qui améliore nettement la résistance d'accouplement. Lorsque les éléments de vis sont serrés contre une barre de renforcement, l'usinage effectué non seulement met en contact direct la surface circonférentielle de l'extrémité de barre d'armature séparant les nervures mais creuse également dans la surface interne du coupleur mécanique en éliminant les interstices. Des moyens d'accouplement et de préhension du corps de manchon tubulaire sur les extrémités de barres de renforcement d'extrémités sont en outre décrits.