(19)

(11)

EP 1 869 255 A2

(12)

(43) Date of publication: 26.12.2007 Bulletin 2007/52 (21) Application number: 06739113.6 (22) Date of filing: 21.03.2006

(51) International Patent Classification (IPC):  E01C 11/02(2006.01) (86) International application number: PCT/US2006/010196 (87) International publication number: WO 2006/102310 (28.09.2006 Gazette 2006/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 21.03.2005 US 663201 P (71) Applicant: KALMAN fLOOR cOMPANY Evergreen,CO 8043 (US)	(72) Inventor: YTTERBERG, Carl, N. Evergreen, CO 80439 (US) (74) Representative: Hedges, Martin Nicholas  A.A. Thornton & Co. 235 High Holborn London WC1V 7LE London WC1V 7LE (GB)