(19)

(11)

EP 0 845 062 A1

(12)

(43) Date of publication: 03.06.1998 Bulletin 1998/23 (21) Application number: 96927793.0 (22) Date of filing: 15.08.1996

(51) International Patent Classification (IPC):  E01C 19/ 29( . ) E04G 21/ 10( . ) (86) International application number: PCT/GB1996/001997 (87) International publication number: WO 1997/007286 (27.02.1997 Gazette 1997/10)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 16.08.1995 GB 19950016799 19.01.1996 GB 19960001092 22.01.1996 GB 19960001238 (71) Applicant: ERRUT PRODUCTS LIMITED Chesterfield Derbyshire S43 3PG (GB)	(72) Inventor: WILLIAMSON, John Cutthorpe, Chesterfield S42 7AD (GB) (74) Representative: Fyles, Julie Marie, et al  Markgraaf Patents Limited The Crescent 54 Blossom Street York YO2 2AP York YO2 2AP (GB)