(19)

(11)

EP 2 699 732 A1

(12)

(43) Date of publication: 26.02.2014 Bulletin 2014/09 (21) Application number: 11864035.8 (22) Date of filing: 19.04.2011

(51) International Patent Classification (IPC):  E01C 19/38(2006.01) (86) International application number: PCT/US2011/032970 (87) International publication number: WO 2012/144986 (26.10.2012 Gazette 2012/43)

(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 (71) Applicant: Volvo Construction Equipment AB 631 85 Eskilstuna (SE)	(72) Inventors: HAUPT, John R. Shippensburg, Pennsylvania 17257 (US) MACDONALD, Michael P. Chambersburg, Pennsylvania 17202 (US) (74) Representative: Eriksson, Tommy  Volvo Technology Corporation Corporate Patents, 06820, M1.7 405 08 Göteborg 405 08 Göteborg (SE)