(19)
(11) EP 2 913 477 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.07.2016 Bulletin 2016/28

(43) Date of publication A2:
02.09.2015 Bulletin 2015/36

(21) Application number: 15155614.9

(22) Date of filing: 18.02.2015
(51) International Patent Classification (IPC): 
E21D 20/02(2006.01)
 E21D 21/00(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 18.02.2014 ZA 201401189

(71) Applicant: Mine Support Products (pty) Ltd
Vereeniging 1939 (ZA)

(72) Inventor:
  • Nissen, Christian
    1939 (Duncanville) Vereeniging (ZA)

(74) Representative: Patentanwälte Ruff, Wilhelm, Beier, Dauster & Partner mbB 
Kronenstraße 30
70174 Stuttgart
70174 Stuttgart (DE)

   


(54) Rock bolt


(57) A rock bolt (10) which has a rectangular blade (42), which can pierce and shred a flexible housing, extending from cross-shaped mixing formations (44) at one end of an elongate rod (12).







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