(19)

(11)

EP 2 994 639 A1

(12)

(43) Date of publication: 16.03.2016 Bulletin 2016/11 (21) Application number: 14719308.0 (22) Date of filing: 23.04.2014

(51) International Patent Classification (IPC):  F04B 17/04(2006.01) F04B 53/16(2006.01) F04B 53/12(2006.01) (86) International application number: PCT/EP2014/058268 (87) International publication number: WO 2014/177442 (06.11.2014 Gazette 2014/45)

(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 Designated Extension States: BA ME (30) Priority: 30.04.2013 CH 887132013 (71) Applicant: Gotec SA 1950 Sion (CH)	(72) Inventors: MAYORAZ, Pierre CH-1981 Vex (CH) DAYER, Gaetan 1950 Sion (CH) (74) Representative: P&TS SA (AG, Ltd.)  Av. J.-J. Rousseau 4 P.O. Box 2848 2001 Neuchâtel 2001 Neuchâtel (CH)