(19)

(11)

EP 0 777 843 A1

(12)

(43) Date of publication: 11.06.1997 Bulletin 1997/24 (21) Application number: 94932173.0 (22) Date of filing: 25.08.1994

(51) International Patent Classification (IPC):  F16K 31/ 68( . ) F25B 41/ 06( . ) F25B 41/ 04( . ) G05D 23/ 12( . ) (86) International application number: PCT/US1994/010255 (87) International publication number: WO 1996/006316 (29.02.1996 Gazette 1996/10)

(84) Designated Contracting States: AT CH DE DK GB LI (71) Applicant: Alsenz, Richard H. Missouri City, TX 77489 (US)	(72) Inventor: Alsenz, Richard H. Missouri City, TX 77489 (US) (74) Representative: Flint, Adam  W.H. Beck, Greener & Co., 7 Stone Buildings, Lincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)