(19)

(11)

EP 2 531 137 A1

(12)

(43) Date of publication: 12.12.2012 Bulletin 2012/50 (21) Application number: 11740251.1 (22) Date of filing: 01.02.2011

(51) International Patent Classification (IPC):  A61F 2/00(2006.01) (86) International application number: PCT/US2011/023306 (87) International publication number: WO 2011/097209 (11.08.2011 Gazette 2011/32)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 02.02.2010 US 300674 P 04.02.2010 US 301373 P (71) Applicant: BFKW, LLC Ada, MI 49301 (US)	(72) Inventor: BAKER, Randal S. Ada, Michigan 49301 (US) (74) Representative: Moser & Götze  Patentanwälte Paul-Klinger-Strasse 9 45127 Essen 45127 Essen (DE)