(19)

(11)

EP 0 517 813 A1

(12)

(43) Date of publication: 16.12.1992 Bulletin 1992/51 (21) Application number: 91905748.0 (22) Date of filing: 27.02.1991

(51) International Patent Classification (IPC):  A47K 13/ 12( . ) A47K 13/ 10( . ) (86) International application number: PCT/US1991/001314 (87) International publication number: WO 1991/012760 (05.09.1991 Gazette 1991/21)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IT LI LU NL SE (30) Priority: 27.02.1990 US 19900485479 (71) Applicants: YOKE, W., Calvin Morristown, IN 46161 (US) YOKE, James, H. Acton, IN 46259 (US)	(72) Inventors: YOKE, W., Calvin Morristown, IN 46161 (US) YOKE, James, H. Acton, IN 46259 (US) (74) Representative: Allman, Peter John, et al  MARKS & CLERK, Sussex House, 83-85 Mosley Street Manchester M2 3LG Manchester M2 3LG (GB)