F01C 1/107

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9988513 Stator compound having an NBIR terpolymer elastomeric base and stators and downhole motors using the sameJan 24, 17Jun 05, 18PV Fluid Products, Inc.
9796835 Stator compound having an NBIR terpolymer elastomeric base and stators and downhole motors using the sameJan 24, 17Oct 24, 17PV Fluid Products, Inc.
9540877 Drilling motor valve and method of using sameNov 08, 11Jan 10, 17NATIONAL OILWELL VARCO, L.P.
9447688 Indexed positive displacement rotary motion deviceDec 09, 13Sep 20, 16EXPONENTIAL TECHNOLOGIES, INC.
9309862 Nutating fluid-mechanical energy converterNov 25, 13Apr 12, 16HALLIBURTON ENERGY SERVICES, INC.
9051780 Progressive cavity hydraulic machineJan 09, 08Jun 09, 15SCHLUMBERGER TECHNOLOGY CORPORATION
8956135 Screw compressor with asymmetric portsMay 26, 09Feb 17, 15CARRIER CORPORATION
8708643 Counter-rotatable fan gas turbine engine with axial flow positive displacement worm gas generatorAug 14, 07Apr 29, 14GENERAL ELECTRIC COMPANY
8678786 Scroll compressor with partial unloader for start-upOct 21, 10Mar 25, 14HONEYWELL INTERNATIONAL INC.
8439658 Progressing cavity pump rubber reinforcement device for rotor alignmentNov 03, 09May 14, 13BAKER HUGHES INCORPORATED
8308463 Resin screw rotor molded to a metallic shaftSep 28, 07Nov 13, 12KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
7837451 Non-contact seal for positive displacement capture deviceFeb 29, 08Nov 23, 10GENERAL ELECTRIC COMPANY
6716008 Eccentric screw pump with expanded temperature rangeOct 09, 02Apr 06, 04Wilhelm Kaechele GmbH Elastomertechnik
6461128 Progressive cavity helical deviceJan 18, 01Oct 08, 02BICO DRILLING TOOLS, INC.
6425745 Surface treatment of helically-profiled rotorsMay 03, 01Jul 30, 02Monitor Coatings and Engineers Limited
5221197 Working member of a helical downhole motor for drilling wellsAug 08, 91Jun 22, 93Not available
4764094 Screw machine having a plurality of symmetrically arranged rotorsMar 20, 87Aug 16, 88Vsesojuzny Nauchnoissledovatelsky Institut Burovoi Tekhniki
4676725 Moineau type gear mechanism with resilient sleeveDec 27, 85Jun 30, 87BAKER HUGHES INCORPORATED
4482305 Axial flow apparatus with rotating helical chamber and spindle membersDec 29, 83Nov 13, 84Orszagos Koolaj es Gazipari Troszt
4415316 Down hole motorApr 27, 81Nov 15, 83Christensen, Inc., EASTMAN CHRISTENSEN COMPANY,