(19)

(11)

EP 0 050 656 A1

(12)

(43) Date of publication: 05.05.1982 Bulletin 1982/18 (21) Application number: 81901259.0 (22) Date of filing: 23.04.1981

(51) International Patent Classification (IPC):  F15B 13/ 01( . ) (86) International application number: PCT/US1981/000536 (87) International publication number: WO 1981/003208 (12.11.1981 Gazette 1981/27)

(84) Designated Contracting States: DE FR GB NL SE (30) Priority: 01.05.1980 US 19800145511 (71) Applicant: THE BOEING COMPANY Seattle Washington 98124 (US)	(72) Inventor: TURNER; Bernus Gene Woodinville, WA 98072 (US) (74) Representative: Hoijtink, Reinoud, et al  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 NL-2517 GK Den Haag NL-2517 GK Den Haag (NL)