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公开(公告)号：EP0591210A1
公开(公告)日：1994-04-13
申请号：EP91919094.0
申请日：1991-10-29
发明人： GRAY, Peter, Andrew
IPC分类号： E21D21
CPC分类号： E21D21/0026 , E21D21/0053
摘要： Boulon de rocher autotaraudeur comprenant un profil fileté discontinu (9) ayant plusieurs arêtes de coupe (11) et au moins une cannelure (13) s'étendant sur la longueur du boulon de rocher. Les arêtes de coupe (11) sont conçues pour découper un profil taraudé dans la surfce interne d'un trou pilote, de sorte que le profil fileté (9) du boulon de rocher s'engage avec le profil taraudé de la surface interne. Ladite cannelure ou chacune d'entre elles (13) est (sont) conçue(s) pour enlever plus facilement le matériau découpé par les arêtes de coupe (11). Dans une réalisation préférée, le boulon de rocher comprend un trou axial interne (25) permettant d'injecter de l'eau à travers le boulon de rocher pendant la découpe du profil taraudé. Un boulon de rocher autotaraudeur et autoperceur comprend un boulon de rocher autotaraudeur du type de celui décrit plus haut et un dispositif de découpe (23) permettant de creuser un trou pour le boulon de rocher.
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公开(公告)号：EP0591210B1
公开(公告)日：1997-07-09
申请号：EP91919094.2
申请日：1991-10-29
发明人： GRAY, Peter, Andrew
IPC分类号： E21D21/00
CPC分类号： E21D21/0026 , E21D21/0053
摘要： A self-tapping rock bolt comprises a discontinuous threaded profile (9) having a plurality of cutting edges (11) and at least one flute (13) extending along the length of the rock bolt. The cutting edges (11) are adapted to cut a threaded profile in the internal surface of a pilot hole so that the threaded profile (9) of the rock bolt interlocks therewith. The or each flute (13) is adapted to facilitate removal of material cut by the cutting edges (11). A preferred embodiment of the rock bolt includes an internal axial hole (25) to enable water to be injected through the rock bolt as the threaded profile is being cut. A self-tapping and self-drilling rock bolt comprises the self-tapping rock bolt described above and a cutting means (23) to cut a hole for the rock bolt.
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公开(公告)号：EP0662018B1
公开(公告)日：2000-03-15
申请号：EP93920612.4
申请日：1993-09-22
发明人： GRAY, Peter, Andrew
CPC分类号： B21C37/06 , B21B1/163 , B21C37/08 , B21H8/00 , B21K5/02 , E21D21/0066 , Y10T29/49893
摘要： A hollow bar (3) and a method of manufacturing the hollow bar are disclosed. Typically, the hollow bar is a threaded rock bolt or a drill rod. The hollow bar (3) comprises two or more elongate members (21a, 21b) connected together along the longitudinal edges (41) of the members (21a, 21b). The method comprises rolling the members (21a, 21b) and welding or gluing the members (21a, 21b) together along the longitudinal edges (41) of the members (21a, 21b).
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公开(公告)号：EP0662018A1
公开(公告)日：1995-07-12
申请号：EP93920612.0
申请日：1993-09-22
发明人： GRAY, Peter, Andrew
CPC分类号： B21C37/06 , B21B1/163 , B21C37/08 , B21H8/00 , B21K5/02 , E21D21/0066 , Y10T29/49893
摘要： A hollow bar (3) and a method of manufacturing the hollow bar are disclosed. Typically, the hollow bar is a threaded rock bolt or a drill rod. The hollow bar (3) comprises two or more elongate members (21a, 21b) connected together along the longitudinal edges (41) of the members (21a, 21b). The method comprises rolling the members (21a, 21b) and welding or gluing the members (21a, 21b) together along the longitudinal edges (41) of the members (21a, 21b).
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公开(公告)号：EP0752069A1
公开(公告)日：1997-01-08
申请号：EP95911161.0
申请日：1995-03-08
发明人： GRAY, Peter, Andrew
摘要： A bracket (3) for suspending a chain (19) or the like member is disclosed. The bracket (3) comprises a body portion (7, 9, 11) and a pair of slots (15) formed in the body portion for receiving links (17) of the chain (19) that are separated by one or more intermediate links (17a).
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公开(公告)号：EP0710320A1
公开(公告)日：1996-05-08
申请号：EP94922168.0
申请日：1994-07-26
发明人： GRAY, Peter, Andrew
IPC分类号： E21D21
CPC分类号： E21D21/0086 , E21D21/0053
摘要： The bearing plate assembly for a rock bolt has a hemispherical or similarly domed bearing plate (15) having a rim providing a reduced contact area with rock face (21) and a circular opening sized so that the rock bolt (3) can assume a range of angles to the rock face. A washer (17) is provided having a radius matching that of plate (15). A keyblock (19) is inserted in the hole of the washer and surrounding the rock bolt. Its presence increases resistance by preventing deformation of the washer (17) into the hole thereof when the assembly is subjected to excessive stress. The keyblock (19) may be of metal or plastics and formed integrally with tightening nut (13) or with the rock bolt if desired.
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