(19)

(11)

EP 0 366 653 A1

(12)

(43) Date of publication: 09.05.1990 Bulletin 1990/19 (21) Application number: 88903558.0 (22) Date of filing: 08.03.1988

(51) International Patent Classification (IPC):  B23B 5/ 16( . ) (86) International application number: PCT/US1988/000833 (87) International publication number: WO 1989/008517 (21.09.1989 Gazette 1989/23)

(84) Designated Contracting States: DE FR GB (71) Applicant: BIRKESTRAND, Orville J. South El Monte, CA 91733 (US)	(72) Inventor: BIRKESTRAND, Orville J. South El Monte, CA 91733 (US) (74) Representative: Wilson, Nicholas Martin, et al  WITHERS & ROGERS 4 Dyer's Buildings Holborn London EC1N 2JT London EC1N 2JT (GB)