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with coaxially-mounted members having continuously-changing circumferential spacing between them

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  • CPC
  • F04C2/063
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Parent Industries

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F04Liquid pumps F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS F04C2/00Rotary-piston machines or pumps

Current Industry

F04C2/063with coaxially-mounted members having continuously-changing circumferential spacing between them
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Arrangement comprising a rotor, a stator and means for mutual posit...
    • Patent number 10,612,541
    • Issue date Apr 7, 2020
    • Hudiksvalls Teknikcentrum AB
    • Curt Gunnar Falk
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Electromagnetic only vane coordination of a cat and mouse engine
    • Patent number 10,472,965
    • Issue date Nov 12, 2019
    • Anatoli Galin
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Mud motor assembly
    • Patent number 9,803,424
    • Issue date Oct 31, 2017
    • Smart Drilling and Completion, Inc.
    • William Banning Vail
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mud motor assembly
    • Patent number 9,611,693
    • Issue date Apr 4, 2017
    • Smart Drilling and Completion, Inc.
    • William Banning Vail
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Systems and methods for energizing and distributing fluids
    • Patent number 8,011,903
    • Issue date Sep 6, 2011
    • Robert William Pollack
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Micro-fluidic valve with a colloidal particle element
    • Patent number 6,802,489
    • Issue date Oct 12, 2004
    • Colorado School of Mines
    • David W. M. Marr
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Twin vane pump apparatus for dispensing meat products
    • Patent number 6,626,643
    • Issue date Sep 30, 2003
    • Handtmann Piereder Machinery Ltd.
    • Georg Staudenrausch
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Hydraulic displacement machine
    • Patent number 6,149,391
    • Issue date Nov 21, 2000
    • Carl Schenk AG
    • Andreas Pohl
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Extracorporeal blood pump for cardiac surgery
    • Patent number 5,800,138
    • Issue date Sep 1, 1998
    • Salvador Merce Vives
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Pump with inlet and outlet simultaneously exposed to pump chamber a...
    • Patent number 5,639,220
    • Issue date Jun 17, 1997
    • Brother Kogyo Kabushiki Kaisha
    • Kiyoharu Hayakawa
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotary pump apparatus with plural abutting pumping segments
    • Patent number 4,385,874
    • Issue date May 31, 1983
    • Hilbert J. Savoie
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    3404632
    • Patent number 3,404,632
    • Issue date Oct 8, 1968
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    3333546
    • Patent number 3,333,546
    • Issue date Aug 1, 1967
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    3277796
    • Patent number 3,277,796
    • Issue date Oct 11, 1966
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    3227090
    • Patent number 3,227,090
    • Issue date Jan 4, 1966
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    2816508
    • Patent number 2,816,508
    • Issue date Dec 17, 1957
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    2751888
    • Patent number 2,751,888
    • Issue date Jun 26, 1956
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    2672099
    • Patent number 2,672,099
    • Issue date Mar 16, 1954
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    2642807
    • Patent number 2,642,807
    • Issue date Jun 23, 1953
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    2569640
    • Patent number 2,569,640
    • Issue date Oct 2, 1951
    • F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
  • Information Patent Grant

    2475703
    • Patent number 2,475,703
    • Issue date Jul 12, 1949
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    2149143
    • Patent number 2,149,143
    • Issue date Feb 28, 1939
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    2118589
    • Patent number 2,118,589
    • Issue date May 24, 1938
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    2112573
    • Patent number 2,112,573
    • Issue date Mar 29, 1938
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    2111682
    • Patent number 2,111,682
    • Issue date Mar 22, 1938
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    1991308
    • Patent number 1,991,308
    • Issue date Feb 12, 1935
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    1833501
    • Patent number 1,833,501
    • Issue date Nov 24, 1931
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    1653343
    • Patent number 1,653,343
    • Issue date Dec 20, 1927
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents