(19)

(11)

EP 0 214 999 A1

(12)

(43) Date of publication: 25.03.1987 Bulletin 1987/13 (21) Application number: 85904165.0 (22) Date of filing: 25.02.1985

(51) International Patent Classification (IPC):  B64C 39/ 00( . ) (86) International application number: PCT/US1985/000305 (87) International publication number: WO 1986/004874 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicant: RICHARDS AEROSPACE RESEARCH CORPORATION Burnsville, MN 55337 (US)	(72) Inventor: CUCUZZA, Joseph, R. Bellevue, WA 98004 (US)