(19)

(11)

EP 1 387 610 A1

(12)

(43) Date of publication: 11.02.2004 Bulletin 2004/07 (21) Application number: 01921088.9 (22) Date of filing: 19.04.2001

(51) International Patent Classification (IPC)7: A01G 31/02, F25D 31/00 (86) International application number: PCT/CA2001/000531 (87) International publication number: WO 2002/085103 (31.10.2002 Gazette 2002/44)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (71) Applicant: Boulter, Clayton Maple Ridge, British Columbia V2X 1X4 (CA)	(72) Inventor: Boulter, Clayton Maple Ridge, British Columbia V2X 1X4 (CA) (74) Representative: Burrows, Anthony Gregory  Business Centre WestAvenue One, Business Park Letchworth Garden CityHertfordshire SG6 2HB Letchworth Garden CityHertfordshire SG6 2HB (GB)