(19)

(11)

EP 0 809 774 A1

(12)

(43) Date of publication: 03.12.1997 Bulletin 1997/49 (21) Application number: 96934259.0 (22) Date of filing: 25.10.1996

(51) International Patent Classification (IPC):  F25C 3/ 04( . ) (86) International application number: PCT/CA1996/000709 (87) International publication number: WO 1997/016686 (09.05.1997 Gazette 1997/20)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (30) Priority: 30.10.1995 CA 19952161720 (71) Applicant: McKinney, Vernon, Lorne Calgary, Alberta T3L 1V2 (CA)	(72) Inventor: McKinney, Vernon, Lorne Calgary, Alberta T3L 1V2 (CA) (74) Representative: Pidgeon, Robert John, et al  Appleyard Lees 15 Clare Road Halifax West Yorkshire HX1 2HY Halifax West Yorkshire HX1 2HY (GB)