(19)

(11)

EP 0 072 794 A1

(12)

(43) Date of publication: 02.03.1983 Bulletin 1983/09 (21) Application number: 81901606.0 (22) Date of filing: 17.02.1981

(51) International Patent Classification (IPC):  B63B 35/ 79( . ) (86) International application number: PCT/US1981/000196 (87) International publication number: WO 1982/002866 (02.09.1982 Gazette 1982/21)

(84) Designated Contracting States: AT CH DE FR GB LI LU NL SE (71) Applicant: KRANSCO MANUFACTURING, INC. South San Francisco, CA 94080 (US)	(72) Inventor: FREMONT, Michael J. Encinitas, CA 92024 (US)