(19)

(11)

EP 0 065 988 A1

(12)

(43) Date of publication: 08.12.1982 Bulletin 1982/49 (21) Application number: 82900411.0 (22) Date of filing: 02.12.1981

(51) International Patent Classification (IPC):  F02B 41/ 00( . ) F02B 75/ 26( . ) F02B 75/ 02( . ) F02B 41/ 02( . ) F02F 7/ 00( . ) (86) International application number: PCT/US1981/001602 (87) International publication number: WO 1982/001913 (10.06.1982 Gazette 1982/15)

(84) Designated Contracting States: FR (30) Priority: 02.12.1980 US 19800212093 (71) Applicants: EVANS, Hugh G. Spokane, WA 99204 (US) SPEER, Stephen R. Spokane, WA 99204 (US)	(72) Inventors: EVANS, Hugh G. Spokane, WA 99204 (US) SPEER, Stephen R. Spokane, WA 99204 (US) (74) Representative: Kyle, Diana, et al  Elkington and Fife Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)