(19)

(11)

EP 0 252 904 A1

(12)

(43) Date of publication: 20.01.1988 Bulletin 1988/03 (21) Application number: 85905519.0 (22) Date of filing: 29.10.1985

(51) International Patent Classification (IPC):  B25C 1/ 06( . ) (86) International application number: PCT/GB1985/000492 (87) International publication number: WO 1987/002611 (07.05.1987 Gazette 1987/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicant: CUNNINGHAM, James D. Boulder, CO 80302 (US)	(72) Inventor: CUNNINGHAM, James D. Boulder, CO 80302 (US)