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EP 3 177 808 A1

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(43) Date of publication: 14.06.2017 Bulletin 2017/24 (21) Application number: 15741453.3 (22) Date of filing: 09.07.2015

(51) International Patent Classification (IPC):  E21C 47/00(2006.01) B23K 20/12(2006.01) B23K 33/00(2006.01) B23K 11/00(2006.01) B23K 20/22(2006.01) B23K 103/18(2006.01) (86) International application number: PCT/US2015/039785 (87) International publication number: WO 2016/007771 (14.01.2016 Gazette 2016/02)

(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 Designated Extension States: BA ME Designated Validation States: MA (30) Priority: 10.07.2014 US 201462023166 P (71) Applicants: Megastir Technologies LLC Provo, UT 84604 (US) Canavan, John T. North Versailles, Pennsylvania 15137 (US) Klinginsmith, Michael D. Moreland Hills, Ohio 44022 (US)

(72) Inventors: STEEL, Russell J. Salem, UT 84653 (US) FLECK, Rodney Dale Mansfield, TX76063 (US) TUCKER, Christopher Arthur Provo, UT 84601 (US) ROSAL, David West Bountiful, UT 84087 (US) PACKER, Scott M. Alpine, UT 84004 (US) CANAVAN, John T. North Versailles, PA 15137 (US) KLINGINSMITH, Michael D. Moreland Hills, OH 44022 (US) (74) Representative: Gulde & Partner  Patent- und Rechtsanwaltskanzlei mbB Wallstraße 58/59 10179 Berlin 10179 Berlin (DE)