(19)

(11)

EP 1 236 015 A1

(12)

(43) Date of publication: 04.09.2002 Bulletin 2002/36 (21) Application number: 99951769.1 (22) Date of filing: 05.10.1999

(51) International Patent Classification (IPC)7: F26B 11/16, F26B 25/04, F26B 17/28, F26B 17/20 (86) International application number: PCT/US9923/112 (87) International publication number: WO 0102/5709 (12.04.2001 Gazette 2001/15)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (71) Applicant: Rubicon Development Company, L.L.C. New Orleans, LA 70130-2646 (US)	(72) Inventors: BOLTON, Danny, R. Brownwood, TX 76801 (US) BIGHAM, David, L. Novice, TX 79538 (US) (74) Representative: Vleck, Jan Montagu  Reddie & Grose,16 Theobalds Road London WC1X 8PL London WC1X 8PL (GB)