(19)

(11)

EP 2 900 874 A1

(12)

(43) Date of publication: 05.08.2015 Bulletin 2015/32 (21) Application number: 13778290.0 (22) Date of filing: 15.04.2013

(51) International Patent Classification (IPC):  E01H 1/08(2006.01) E01H 1/04(2006.01) (86) International application number: PCT/CA2013/000361 (87) International publication number: WO 2013/155599 (24.10.2013 Gazette 2013/43)

(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 (30) Priority: 15.04.2012 US 201261624373 P (71) Applicant: Vanderlinden, Roger Burlington, Ontario L7L 6B2 (CA)	(72) Inventor: Vanderlinden, Roger Burlington, Ontario L7L 6B2 (CA) (74) Representative: Orr, Robert  Urquhart-Dykes & Lord LLP Tower North Central Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)