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公开(公告)号：US20170342836A1
公开(公告)日：2017-11-30
申请号：US15680640
申请日：2017-08-18
CPC分类号： E21D20/021 , E21D20/02 , E21D20/023 , E21D20/028 , E21D21/0006 , E21D21/0026 , E21D21/004 , E21D21/0046 , E21D21/008 , E21D21/0086
摘要： A rock bolt includes an elongate metallic body having a first end and an opposed second end, a threaded portion at the second end, for attaching thereto and locating thereon, a nut and a bearing plate, a mechanical anchor at, or at least partially located on, a first end portion of the body and a first resistive anchor, located between the threaded portion and the mechanical anchor.
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公开(公告)号：US20180291737A1
公开(公告)日：2018-10-11
申请号：US15578001
申请日：2016-06-23
CPC分类号： E21D21/0026 , E21D20/02 , E21D20/028 , E21D21/0006 , E21D21/0033 , E21D21/008
摘要： A rock bolt assembly includes a rock bolt with an elongate body between distal and proximal ends, a tubular sleeve with first and second ends, proximal and distal ends of the bolt projecting from first and second ends of the sleeve, a load bearing barrel centrally bored to engage the rock bolt between the sleeve's first end and the bolt's proximal end, which barrel is adapted at a forward end to engage with the sleeve's second end in sealing contact, and which barrel has at least one grout conduit between the barrel's exterior surface and the bore, which at least one conduit defines a part of a grout passage which communicates the exterior surface of the barrel with an interior of the sleeve, when the barrel is engaged with the sleeve, and a seal which seals the grout passage to grout outflow but accommodates inflow of grout from a source.
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公开(公告)号：US20190100998A1
公开(公告)日：2019-04-04
申请号：US15937744
申请日：2018-03-27
摘要： A rock anchor assembly includes a rock anchor with a flexible element and first/second cylindrical connector elements engaged to proximal and distal ends of the element, a flexible tubular sleeve longitudinally extending between first and second ends, on the rock anchor so end parts of the rock anchor project from sleeve ends; a load bearing barrel centrally bored engaging the first connector element between the first end of the sleeve and a proximal end of the rock anchor, the barrel engaging the first end of the sleeve in sealing contact, the barrel having a grout conduit between the barrel exterior and the bore, the conduit defining part of a grout passage interconnecting the barrel exterior and sleeve interior, when the barrel engages the sleeve; a seal preventing grout outflow but accommodating grout inflow; a tensioner engaging the first tubular connector element, and a mechanical anchor engaging the second tubular connector.
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公开(公告)号：US20180230801A1
公开(公告)日：2018-08-16
申请号：US15746215
申请日：2015-09-16
IPC分类号： E21D21/00
CPC分类号： E21D21/0033 , E21D20/003 , E21D20/02 , E21D21/0046
摘要： A friction bolt assembly includes: an expansible sleeve having a tubular body between leading and trailing ends, which body has a longitudinally extending formation about which the body resiliently deforms and which formation extends along at least part of the body, ending at the body leading end; a rod extending through the sleeve body and between first and second ends and on which a projecting part is defined between the trailing end of the sleeve body and the second end; an expansion element on the rod at the first end; a first load bearing formation on the projecting rod part, moveable along the projecting part to abut the sleeve trailing end; a load applicator on the projecting part of the rod; and a second load bearing formation mounted over the projecting part of the rod between the first load bearing formation and the load applicator unit.
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