(19)

(11)

EP 0 697 049 A1

(12)

(43) Date of publication: 21.02.1996 Bulletin 1996/08 (21) Application number: 93910112.0 (22) Date of filing: 12.05.1993

(51) International Patent Classification (IPC):  E02F 3/ 14( . ) E21C 25/ 34( . ) (86) International application number: PCT/FR1993/000459 (87) International publication number: WO 1994/026987 (24.11.1994 Gazette 1994/26)

(84) Designated Contracting States: DE ES FR GB IE IT (71) Applicants: Dalaine, Jean-Charles F-95150 Taverny (FR) DE CARLI, Lucien F-95550 Bessancourt (FR)	(72) Inventors: Dalaine, Jean-Charles F-95150 Taverny (FR) DE CARLI, Lucien F-95550 Bessancourt (FR) (74) Representative: Derambure, Christian, et al  Cabinet Bouju Derambure Bugnion 52, rue de Monceau F-75008 Paris F-75008 Paris (FR)