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(11)

EP 2 678 497 A1

(12)

(43) Date of publication: 01.01.2014 Bulletin 2014/01 (21) Application number: 12704540.9 (22) Date of filing: 10.02.2012

(51) International Patent Classification (IPC):  E04H 9/10(2006.01) E04C 2/26(2006.01) E04C 2/292(2006.01) E04B 1/343(2006.01) E04B 2/54(2006.01) E04B 1/61(2006.01) E04C 2/284(2006.01) E04C 2/296(2006.01) E04B 2/40(2006.01) (86) International application number: PCT/GB2012/050294 (87) International publication number: WO 2012/114084 (30.08.2012 Gazette 2012/35)

(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: 21.02.2011 GB 201102944 (71) Applicants: Hertel Technical Services Limited Teeside, Cleveland TS22 5FG (GB) Rokk, Michael Jon Hartlepool, County Durham TS26 0LX (GB)	(72) Inventors: ROKK, Michael Jon Hartlepool County Durham TS26 0LX (GB) ZIELINSKI, Garry Jan Hartlepool County Durham TS25 2QS (GB) ALBANS-JACKSON, Michael John Scotton Lincolnshire DN21 3QT (GB) (74) Representative: Vinsome, Rex Martin  Urquhart-Dykes & Lord LLP 12th Floor Cale Cross House 156 Pilgrim Street Newcastle-upon-Tyne NE1 6SU Newcastle-upon-Tyne NE1 6SU (GB)