(19)

(11)

EP 2 403 994 A1

(12)

(43) Date of publication: 11.01.2012 Bulletin 2012/02 (21) Application number: 10711449.8 (22) Date of filing: 25.02.2010

(51) International Patent Classification (IPC):  E01B 29/10(2006.01) E01B 29/13(2006.01) (86) International application number: PCT/GB2010/050327 (87) International publication number: WO 2010/097628 (02.09.2010 Gazette 2010/35)

(84) Designated Contracting States: 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 SE SI SK SM TR (30) Priority: 25.02.2009 GB 0903147 (71) Applicant: W & D McCulloch Ltd. Ballantrae, Ayrshire KA26 0NB (GB)	(72) Inventor: McCULLOCH, William Ballantrae Ayrshire KA26 0NB (GB) (74) Representative: Gray, John James  Murgitroyd & Company Scotland House 165-169 Scotland Street Glasgow G5 8PL Glasgow G5 8PL (GB)