EP 0259755 B1 19910828 - ROCK ANCHORING BOLT
Title (en)
ROCK ANCHORING BOLT
Publication
Application
Priority
- DE 3630832 A 19860910
- DE 3724165 A 19870722
Abstract (en)
[origin: WO8802058A1] A rock anchor consists of a body member formed as a drilling-rod (1), which at one end carries a drill-head (2) and has externally over its whole length a coarse thread, for example an approximately round thread (3). The drill-head (2) is welded to the drilling-rod (1). The drilling-rod (1) has only at its forward region, that is adjacent the drill-head (2) peripheral bores (6), whereby the aforesaid forward region, from the drill-head (2), extend over a length of at most 20 cm. The bores (6) extend as an angle to the axis of the drilling-rod (1), namely, from inside to outside in a direction from the drill-head (2). This rock anchor serves simultaneously for making a drilling, whereby the tubular body member serves for the supply of the hydraulic fluid, which passes into the bore-hole via a hydraulic bore (5) in the drill-head (2) and the aforesaid peripheral bores (6) and passes back to the outside of the drilling-rod (1) with the drilling fines produced. After completion of the drilling a mortar suspension under pressure is injected via the aforementioned body member, which likewise flows via the bores (6), so that the borehole is gradually filled with the mortar base of the borehole. The rock anchor according to the invention has considerable structural simplicity and likewise is simple to handle, so that broken rock can readily be stabilised by means of it.
IPC 1-7
IPC 8 full level
E02D 5/76 (2006.01); E02D 5/80 (2006.01); E21D 20/00 (2006.01); E21D 20/02 (2006.01); E21D 21/00 (2006.01)
CPC (source: EP US)
E02D 5/76 (2013.01 - EP US); E21D 20/02 (2013.01 - EP US); E21D 21/0026 (2013.01 - EP US); E21D 21/0053 (2016.01 - EP US)
Designated contracting state (EPC)
AT ES FR GB
DOCDB simple family (publication)
EP 0259755 A1 19880316; EP 0259755 B1 19910828; AU 598048 B2 19900614; AU 8029487 A 19880407; CA 1295155 C 19920204; DE 3724165 A1 19880324; DE 3724165 C2 19900613; ES 2023861 B3 19920216; JP H01500680 A 19890309; JP H0594400 U 19931224; JP H072799 Y2 19950125; US 4946314 A 19900807; WO 8802058 A1 19880324
DOCDB simple family (application)
EP 87112726 A 19870901; AU 8029487 A 19870905; CA 546485 A 19870909; DE 3724165 A 19870722; EP 8700503 W 19870905; ES 87112726 T 19870901; JP 1894793 U 19930414; JP 50569887 A 19870905; US 39018889 A 19890804