(19)

(11)

EP 0 841 882 A1

(12)

(43) Date of publication: 20.05.1998 Bulletin 1998/21 (21) Application number: 97921471.0 (22) Date of filing: 30.04.1997

(51) International Patent Classification (IPC):  A61F 13/ 44( . ) (86) International application number: PCT/US1997/007326 (87) International publication number: WO 1997/040797 (06.11.1997 Gazette 1997/47)

(84) Designated Contracting States: AT BE DE ES FR GB IE IT NL SE (30) Priority: 01.05.1996 US 19960640486 (71) Applicant: DEROYAL INDUSTRIES, INC. Powell, TN 37849 (US)	(72) Inventor: DEBUSK, Autry, O., V. Powell, TN 37849 (US) (74) Representative: Rostovanyi, Peter  AWAPATENT AB, Box 5117 200 71 Malmö 200 71 Malmö (SE)