(19)
(11) EP 0 163 479 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.01.1987 Bulletin 1987/03

(43) Date of publication A2:
04.12.1985 Bulletin 1985/49

(21) Application number: 85303580

(22) Date of filing: 21.05.1985
(84) Designated Contracting States:
AT CH DE FR GB IT LI LU SE

(30) Priority: 22.05.1984 AU 511384

(71) Applicant: ROCK ENGINEERING PTY. LIMITED
 ()

(72) Inventor:
  • Hutchins, Warwick
     ()

   


(54) Ground control


(57) A cable bolt for ground control is made from individual twisted wires obtained from destranding a wire strand. The cable bolt is made by twisting the wires in the direction opposite to their normal twist, the cable bolt so formed having alternate areas (62) of enlarged diameter where the wires are spaced from one and other and areas (61) where the wires lie closely adjacent.






Search report