(19)
(11)EP 0 600 007 A1

(12)

(43)Date of publication:
08.06.1994 Bulletin 1994/23

(21)Application number: 92918818.0

(22)Date of filing:  25.08.1992
(51)International Patent Classification (IPC): 
E21D 21/ 00( . )
(86)International application number:
PCT/US1992/007203
(87)International publication number:
WO 1993/005274 (18.03.1993 Gazette  1993/08)
(84)Designated Contracting States:
AT DE FR IT

(30)Priority: 30.08.1991 US 19910753106

(71)Applicant: INGERSOLL-RAND COMPANY
Woodcliff Lake New Jersey 07675-8738 (US)

(72)Inventor:
  • LANDSBERG, Thomas, J.
    Princeton, NJ 08540 (US)

(74)Representative: Feakins, Graham Allan, et al 
RAWORTH, MOSS & COOK RAWORTH HOUSE 36 Sydenham Road
Croydon, Surrey CRO 2EF
Croydon, Surrey CRO 2EF (GB)

  


(54)FRICTION ROCK ANCHOR