(19)

(11)

EP 2 513 880 A1

(12)

(43) Date of publication: 24.10.2012 Bulletin 2012/43 (21) Application number: 10807530.0 (22) Date of filing: 17.12.2010

(51) International Patent Classification (IPC):  G08B 13/16(2006.01) G01V 1/20(2006.01) G01D 5/20(2006.01) (86) International application number: PCT/GB2010/002288 (87) International publication number: WO 2011/073624 (23.06.2011 Gazette 2011/25)

(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: 17.12.2009 GB 0922044 (71) Applicant: Geoquip Limited Matlock, Derbyshire DE4 4BG (GB)	(72) Inventors: BRIDGEN, Adam, Leonard Matlock Derbyshire DE4 4BG (GB) BARRATT, John Matlock Derbyshire DE4 4BG (GB) (74) Representative: Swindell & Pearson Limited  48 Friar Gate Derby DE1 1GY Derby DE1 1GY (GB)