(19)

(11)

EP 1 526 764 A1

(12)

(43) Date of publication: 04.05.2005 Bulletin 2005/18 (21) Application number: 98931630.2 (22) Date of filing: 25.06.1998

(51) International Patent Classification (IPC)7: A01B 79/00, A01C 1/06 (86) International application number: PCT/US1998/013315 (87) International publication number: WO 1999/066783 (29.12.1999 Gazette 1999/52)

(84) Designated Contracting States: DE FR GB IT SE (71) Applicant: Soil Air Technology LLC Middlefield, CT 06455 (US)	(72) Inventor: POTTS, David A. Killingworth, CT 06412 (US) (74) Representative: Boyce, Conor et al F. R. Kelly & Co.,27 Clyde Road,Ballsbridge Dublin 4 Dublin 4 (IE)