(19)

(11)

EP 0 435 962 A1

(12)

(43) Date of publication: 10.07.1991 Bulletin 1991/28 (21) Application number: 90901434.0 (22) Date of filing: 27.12.1989

(51) International Patent Classification (IPC):  B25B 15/ 00( . ) (86) International application number: PCT/US1989/005729 (87) International publication number: WO 1990/007402 (12.07.1990 Gazette 1990/16)

(84) Designated Contracting States: DE ES FR GB (30) Priority: 30.12.1988 US 19880292481 (71) Applicant: COLVIN, David S. Farmington Hills, MI 48018 (US)	(72) Inventor: COLVIN, David S. Farmington Hills, MI 48018 (US) (74) Representative: Jackson, Peter Arthur, et al  GILL JENNINGS & EVERY Broadgate House 7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)