with elements extending radially from the rotor body not necessarily cooperating with corresponding recesses in the other rotor

Patents Grantslast 30 patents

  • Information Patent Grant

    Multi-stage pump apparatus including sealing member

    • Patent number 12,049,894
    • Issue date Jul 30, 2024
    • Edwards Limited
    • Paul Milner
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Electric pump

    • Patent number 11,905,954
    • Issue date Feb 20, 2024
    • Kabushiki Kaisha Toyota Jidoshokki
    • Tatsushi Mori
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary internal combustion engine

    • Patent number 11,085,298
    • Issue date Aug 10, 2021
    • Marlin Harold Thompson
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Motor-driven roots pump

    • Patent number 10,738,778
    • Issue date Aug 11, 2020
    • Kabushiki Kaisha Toyota Jidoshokki
    • Takayuki Hirano
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Vacuum pump rotor for a vacuum pump having a roots pumping mechanism

    • Patent number 9,920,761
    • Issue date Mar 20, 2018
    • Edwards Limited
    • Nigel Paul Schofield
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Coupling structure for vacuum exhaust device and vacuum exhaust system

    • Patent number 9,273,568
    • Issue date Mar 1, 2016
    • ULVAC, Inc.
    • Toshio Suzuki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Root pump

    • Patent number 8,348,650
    • Issue date Jan 8, 2013
    • Kabushiki Kaisha Toyota Jidoshokki
    • Masahiro Inagaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Fluid machine with divided housing

    • Patent number 8,215,937
    • Issue date Jul 10, 2012
    • Kabushiki Kaisha Toyota Jidoshokki
    • Masahiro Inagaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotary engine

    • Patent number 6,273,055
    • Issue date Aug 14, 2001
    • Robert A. White
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Fluid machine

    • Patent number 6,206,668
    • Issue date Mar 27, 2001
    • Tochigi Fuji Sangyo Kabushiki Kaisha
    • Masao Teraoka
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Control of a lobed rotor machine

    • Patent number 6,176,695
    • Issue date Jan 23, 2001
    • Rotary Power Couple Engines Limited
    • Anthony O. Dye
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary device with means for monitoring and adjusting the clearance...

    • Patent number 6,168,385
    • Issue date Jan 2, 2001
    • Rotary Power Couple Engines Limited
    • John H. Clamp
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary internal combustion engine

    • Patent number 5,329,900
    • Issue date Jul 19, 1994
    • Surgevest Limited
    • Anthony O. Dye
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Hysteresis magnet coupling for roots type pumps

    • Patent number 5,215,501
    • Issue date Jun 1, 1993
    • NGK Insulators, Ltd.
    • Ryusuke Ushikoshi
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Fixing mechanism for a timing gear system

    • Patent number 5,154,595
    • Issue date Oct 13, 1992
    • Aisin Seiki Kabushiki Kaisha
    • Toshio Takeda
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston blower having piston lobe portions shaped to avoid co...

    • Patent number 5,039,289
    • Issue date Aug 13, 1991
    • Wankel GmbH
    • Dankwart Eiermann
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Method of making a dual-shaft machine

    • Patent number 4,974,318
    • Issue date Dec 4, 1990
    • Leybold Aktiengesellschaft
    • Josef Heppekausen
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Two-shaft type rotary machine having a tip circle diameter to shaft...

    • Patent number 4,943,214
    • Issue date Jul 24, 1990
    • Ebara Corporation
    • Yoshihiro Niimura
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary fluid machine

    • Patent number 4,938,670
    • Issue date Jul 3, 1990
    • Tocew Lee
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Method of broaching outer periphery of lobe-type rotor of roots-typ...

    • Patent number 4,869,623
    • Issue date Sep 26, 1989
    • Toyota Jidosha Kabushiki Kaisha
    • Hajime Takeshita
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Mechanical supercharger

    • Patent number 4,823,758
    • Issue date Apr 25, 1989
    • Aisin Seiki Kabushiki Kaisha
    • Toru Tamura
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    External axial rotary piston blower with noise suppressing transfer...

    • Patent number 4,781,541
    • Issue date Nov 1, 1988
    • Wankel GmbH
    • Wolfgang Sohler
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Prime mover with toothed rotors having different diameter portions

    • Patent number 4,753,585
    • Issue date Jun 28, 1988
    • Mark C. Thompson
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary positive displacement machine

    • Patent number 4,702,206
    • Issue date Oct 27, 1987
    • John Harries
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston engine

    • Patent number 4,697,999
    • Issue date Oct 6, 1987
    • Kurt Jauch
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Method of broaching outer periphery of lobe-type rotor of roots-typ...

    • Patent number 4,693,813
    • Issue date Sep 15, 1987
    • Toyota Jidosha Kabushiki Kaisha
    • Hajime Takeshita
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Rotary engine

    • Patent number 4,640,242
    • Issue date Feb 3, 1987
    • Usher Meyman
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Clearance-controlling means comprising abradable layer and abrasive...

    • Patent number 4,466,785
    • Issue date Aug 21, 1984
    • Ingersoll-Rand Company
    • Chandi P. Biswas
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Rotary machine with a plurality of rotors having peripheral rolling...

    • Patent number 4,324,537
    • Issue date Apr 13, 1982
    • Usher Meyman
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Rotary piston engine

    • Patent number 4,078,526
    • Issue date Mar 14, 1978
    • Josef Gail
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

  • Information Patent Application

    External Lobe Rotary Compressor, Expander, or Engine

    • Publication number 20200056613
    • Publication date Feb 20, 2020
    • Roy Michael Kies
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Application

    COMPOSITE MOLDED ROTARY COMPONENT

    • Publication number 20170298733
    • Publication date Oct 19, 2017
    • EATON CORPORATION
    • Kelly Ann WILLIAMS
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTARY PISTON ENGINE

    • Publication number 20150377025
    • Publication date Dec 31, 2015
    • RB HOLDING GMBH
    • Glenn ROLUS BORGWARD
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    ROTOR FOR PUMP

    • Publication number 20140079581
    • Publication date Mar 20, 2014
    • EDWARDS LIMITED
    • Nigel Paul Schofield
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    COUPLING STRUCTURE FOR VACUUM EXHAUST DEVICE AND VACUUM EXHAUST SYSTEM

    • Publication number 20130280062
    • Publication date Oct 24, 2013
    • Ulvac, Inc.
    • Toshio Suzuki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    TURBINE HAVING COOPERATING AND COUNTER-ROTATING ROTORS IN A SAME PLANE

    • Publication number 20120160209
    • Publication date Jun 28, 2012
    • Bobby BOUCHER
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    FLUID MACHINE

    • Publication number 20100047104
    • Publication date Feb 25, 2010
    • Masahiro Inagaki
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    FLUID MACHINE

    • Publication number 20090285711
    • Publication date Nov 19, 2009
    • Kabushiki Kaisha Toyota Jidoshokki
    • Masahiro Inagaki
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Fluid Flow Modulation and Measurement

    • Publication number 20090035121
    • Publication date Feb 5, 2009
    • Dresser, Inc.
    • David B. Watson
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Rotary piston machine

    • Publication number 20080310987
    • Publication date Dec 18, 2008
    • IXETIC HUCKESWAGEN GmbH
    • Stefan Kross
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    COMPOSITE FLUID MACHINE

    • Publication number 20080193301
    • Publication date Aug 14, 2008
    • KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    • Toshiro FUJII
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    ROOTS-TYPE FLUID MACHINE

    • Publication number 20080193315
    • Publication date Aug 14, 2008
    • KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    • Daisuke Masaki
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Engine And An Apparatus For Providing Forced Aspiration To An Engine

    • Publication number 20070277524
    • Publication date Dec 6, 2007
    • EPICAM LIMITED
    • Anthony Osborne Dye
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Turbocompound forced induction system for small engines

    • Publication number 20050198957
    • Publication date Sep 15, 2005
    • Bryan Hyun Joong Kim
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES