(19)

(11)

EP 0 581 941 A1

(12)

(43) Date of publication: 09.02.1994 Bulletin 1994/06 (21) Application number: 93904262.0 (22) Date of filing: 26.02.1993

(51) International Patent Classification (IPC):  F28D 11/ 02( . ) (86) International application number: PCT/GB1993/000398 (87) International publication number: WO 1993/017291 (02.09.1993 Gazette 1993/21)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE (30) Priority: 26.02.1992 GB 19920004093 (71) Applicant: WYKES ENGINEERING CO. ( RUSHDEN) LTD. Wymington, Rushden, Northants NN 10 9LU (GB)	(72) Inventor: WYKES, David John Rushden, Northants NN10 9LU (GB) (74) Representative: Gregory, Timothy Mark  Urquhart-Dykes & Lord Midsummer House 411C Midsummer Boulevard Central Milton Keynes MK9 3BN Central Milton Keynes MK9 3BN (GB)