(19)

(11)

EP 2 591 172 A2

(12)

(88) Date of publication A3: 29.11.2012 (43) Date of publication: 15.05.2013 Bulletin 2013/20 (21) Application number: 11803039.4 (22) Date of filing: 06.07.2011

(51) International Patent Classification (IPC):  E01H 1/04(2006.01) A47L 11/30(2006.01) A47L 11/282(2006.01) E01H 1/08(2006.01) (86) International application number: PCT/CA2011/000761 (87) International publication number: WO 2012/003572 (12.01.2012 Gazette 2012/02)

(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: 06.07.2010 US 361588 P (71) Applicant: Vanderlinden, Roger Burlington, Ontario L7L 6B2 (CA)	(72) Inventor: Vanderlinden, Roger Burlington, Ontario L7L 6B2 (CA) (74) Representative: Orr, Robert et al Urquhart-Dykes & Lord LLP Tower North Central Merrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)