(19)

(11)

EP 0 066 604 A1

(12)

(43) Date of publication: 15.12.1982 Bulletin 1982/50 (21) Application number: 82900230.0 (22) Date of filing: 27.11.1981

(51) International Patent Classification (IPC):  F16L 23/ 028( . ) (86) International application number: PCT/US1981/001596 (87) International publication number: WO 1982/001927 (10.06.1982 Gazette 1982/15)

(84) Designated Contracting States: DE FR GB (30) Priority: 01.12.1980 US 19800212021 (71) Applicant: SCHLICHT, Gunter Orinda, CA 94563 (US)	(72) Inventor: SCHLICHT, Gunter Orinda, CA 94563 (US) (74) Representative: Daunton, Derek  Barlow, Gillett & Percival 94, Market Street Manchester M1 1PJ Manchester M1 1PJ (GB)