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of intermeshing-engagement type

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  • CPC
  • F04C18/08
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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 F04C18/00Rotary-piston pumps specially adapted for elastic fluids

Current Industry

F04C18/08of intermeshing-engagement type
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Dry pump for gas and set of a plurality of dry pumps for gas
    • Patent number 11,920,592
    • Issue date Mar 5, 2024
    • Ateliers Busch SA
    • Théodore Iltchev
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Slide valve for a twin-screw compressor
    • Patent number 11,913,453
    • Issue date Feb 27, 2024
    • Johnson Controls Tyco IP Holdings LLP
    • Shengmei Yang
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor including spoked gear
    • Patent number 11,913,451
    • Issue date Feb 27, 2024
    • Atlas Copco Airpower, naamloze vennootschap
    • Wim Meeusen
    • 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

    Working members of a rotary hydraulic or pneumatic machine
    • Patent number 11,898,560
    • Issue date Feb 13, 2024
    • PERFOBORE INC.
    • Dmitry Fedorovich Baldenko
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Transmission and compressor or vacuum pump provided with such a tra...
    • Patent number 11,867,183
    • Issue date Jan 9, 2024
    • Atlas Copco Airpower, naamloze vennootschap
    • Linus Van Hove
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Geared compressor
    • Patent number 11,821,424
    • Issue date Nov 21, 2023
    • Mitsubishi Heavy Industries Compressor Corporation
    • Hiroyuki Miyata
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Low coefficient of expansion rotors for blowers
    • Patent number 11,746,782
    • Issue date Sep 5, 2023
    • Gardner Denver, Inc.
    • Roger Clive Palmer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor with male and female rotors
    • Patent number 11,725,658
    • Issue date Aug 15, 2023
    • Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd.
    • Haijun Li
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotor polishing device
    • Patent number 11,712,776
    • Issue date Aug 1, 2023
    • Terry Sullivan
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Low coefficient of expansion rotors for vacuum boosters
    • Patent number 11,668,304
    • Issue date Jun 6, 2023
    • Gardner Denver, Inc.
    • Roger Clive Palmer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor with multi-layered coating of the rotor screws
    • Patent number 11,649,823
    • Issue date May 16, 2023
    • KAESER Kompressoren SE
    • Andreas Foerster
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Complex screw rotors
    • Patent number 11,644,034
    • Issue date May 9, 2023
    • GARDNER DENVER, INC.
    • Luke Gray
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Transmission and compressor or vacuum pump provided with such a tra...
    • Patent number 11,629,715
    • Issue date Apr 18, 2023
    • Atlas Copco Airpower, naamloze vennootschap
    • Linus Van Hove
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Compressor or vacuum pump provided with a transmission
    • Patent number 11,629,716
    • Issue date Apr 18, 2023
    • Atlas Copco Airpower, naamloze vennootschap
    • Linus Van Hove
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotor structure of screw compressor and inverter screw compressor w...
    • Patent number 11,629,711
    • Issue date Apr 18, 2023
    • Gree Electric Appliances, Inc. of Zhuhai
    • Hua Liu
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotary fluid flow device
    • Patent number 11,614,089
    • Issue date Mar 28, 2023
    • Alejandro Juan
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Screw compressor for a utility vehicle
    • Patent number 11,578,723
    • Issue date Feb 14, 2023
    • KNORR-BREMSE Systeme fuer Nutzfahrzeuge GmbH
    • Gilles Hebrard
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Driving structure of three-axis multi-stage roots pump
    • Patent number 11,441,564
    • Issue date Sep 13, 2022
    • OVG VACUUM TECHNOLOGY (SHANGHAI) CO., LTD
    • Yi Rong
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Motor-driven roots pump with smooth activation in low-temperature e...
    • Patent number 11,401,936
    • Issue date Aug 2, 2022
    • Kabushiki Kaisha Toyota Jidoshokki
    • Fumiya Shinoda
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Roots pump having a seal member with first and second projections
    • Patent number 11,353,021
    • Issue date Jun 7, 2022
    • Kabushiki Kaisha Toyota Jidoshokki
    • Fumiya Shinoda
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Pump system for semiconductor chamber
    • Patent number 11,353,023
    • Issue date Jun 7, 2022
    • PLAN CO., LTD
    • In Cheol Lee
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Screw vacuum pump without internal cooling
    • Patent number 11,300,123
    • Issue date Apr 12, 2022
    • LEYBOLD GMBH
    • Thomas Dreifert
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Optimized helix angle rotors for roots-style supercharger
    • Patent number 11,286,932
    • Issue date Mar 29, 2022
    • EATON INTELLIGENT POWER LIMITED
    • Matthew G. Swartzlander
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Fluid machine with helically lobed rotors
    • Patent number 11,268,512
    • Issue date Mar 8, 2022
    • Carrier Corporation
    • Richard T. Pandzik
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Offset stator bores for pump sealing
    • Patent number 11,255,326
    • Issue date Feb 22, 2022
    • Edwards Limited
    • Alan Ernest Kinnaird Holbrook
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Multi-stage rotary lobe pump
    • Patent number 11,255,328
    • Issue date Feb 22, 2022
    • LEYBOLD GMBH
    • Dieter Kolvenbach
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Pump end plate manufacturing method and pump
    • Patent number 11,255,330
    • Issue date Feb 22, 2022
    • Taiho Kogyo Co., Ltd.
    • Syuhei Nishida
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Rotor pair for a compression block of a screw machine
    • Patent number 11,248,606
    • Issue date Feb 15, 2022
    • KAESER Kompressoren SE
    • Gerald Weih
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Method and pump arrangement for evacuating a chamber
    • Patent number 11,215,180
    • Issue date Jan 4, 2022
    • Sterling Industry Consult GmbH
    • Heiner Kösters
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

  • Information Patent Application

    ROTOR PAIR FOR A COMPRESSION BLOCK OF A SCREW MACHINE
    • Publication number 20240175436
    • Publication date May 30, 2024
    • KAESER KOMPRESSOREN SE
    • Gerald Weih
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Rotor Assembly, Compressor and Air Conditioner
    • Publication number 20240110565
    • Publication date Apr 4, 2024
    • GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    • Hua Liu
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    LOW COEFFICIENT OF EXPANSION ROTORS FOR BLOWERS
    • Publication number 20230366399
    • Publication date Nov 16, 2023
    • Gardner Denver, Inc.
    • Roger Clive Palmer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    GEARED COMPRESSOR
    • Publication number 20230272796
    • Publication date Aug 31, 2023
    • MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION
    • Hiroyuki Miyata
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    COMPLEX SCREW ROTORS
    • Publication number 20230272797
    • Publication date Aug 31, 2023
    • Gardner Denver, Inc.
    • Luke Gray
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Low Coefficient of Expansion Rotors for Vacuum Boosters
    • Publication number 20230265849
    • Publication date Aug 24, 2023
    • Gardner Denver, Inc.
    • Roger Clive Palmer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    SCREW COMPRESSOR WITH MULTI-LAYERED COATING OF THE ROTOR SCREWS
    • Publication number 20230258180
    • Publication date Aug 17, 2023
    • KAESER KOMPRESSOREN SE
    • Andreas Foerster
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ROTOR PAIR FOR A COMPRESSION BLOCK OF A SCREW MACHINE
    • Publication number 20220136504
    • Publication date May 5, 2022
    • KAESER KOMPRESSOREN SE
    • Gerald Weih
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    LOW COEFFICIENT OF EXPANSION ROTORS FOR BLOWERS
    • Publication number 20210310487
    • Publication date Oct 7, 2021
    • GARDNER DENVER INC.
    • Roger Clive Palmer
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Rotary Fluid Flow Device
    • Publication number 20210301825
    • Publication date Sep 30, 2021
    • Exponential Technologies, Inc.
    • Alejandro Juan
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Rotor Structure of Screw Compressor and Inverter Screw Compressor W...
    • Publication number 20210277898
    • Publication date Sep 9, 2021
    • GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    • Hua Liu
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    COMPLEX SCREW ROTORS
    • Publication number 20210231122
    • Publication date Jul 29, 2021
    • GARDNER DENVER, INC.
    • Luke Gray
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ACTIVE HYDRAULIC RIPPLE CANCELLATION METHODS AND SYSTEMS
    • Publication number 20210207597
    • Publication date Jul 8, 2021
    • ClearMotion, Inc.
    • Colin Patrick O'Shea
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    PUMP SYSTEM FOR SEMICONDUCTOR CHAMBER
    • Publication number 20210180596
    • Publication date Jun 17, 2021
    • PLAN CO., LTD
    • In Cheol LEE
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Application

    MOTOR-DRIVEN ROOTS PUMP
    • Publication number 20210025388
    • Publication date Jan 28, 2021
    • Kabushiki Kaisha Toyota Jidoshokki
    • Fumiya SHINODA
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    STEAM COMPRESSOR COMPRISING A DRY POSITIVE-DISPLACEMENT UNIT AS A S...
    • Publication number 20200386228
    • Publication date Dec 10, 2020
    • Ralf Steffens
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ELECTRIC PUMP DEVICE AND MOUNTING STRUCTURE OF ELECTRIC PUMP
    • Publication number 20200309130
    • Publication date Oct 1, 2020
    • NIDEC TOSOK CORPORATION
    • Hitoshi SAKAMOTO
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    DISPLACEMENT COMPRESSOR SYSTEM FOR R-718
    • Publication number 20200309129
    • Publication date Oct 1, 2020
    • Ralf Steffens
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    A Slide Valve for a Twin-Screw Compressor
    • Publication number 20200291942
    • Publication date Sep 17, 2020
    • Johnson Controls Technology Company
    • Shengmei Yang
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Screw Compressor with Multi-layered Coating of the Rotor Screws
    • Publication number 20200240411
    • Publication date Jul 30, 2020
    • KAESER KOMPRESSOREN SE
    • Andreas Foerster
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Repair of Cast Iron Bore Inner Diameter Surfaces
    • Publication number 20200114478
    • Publication date Apr 16, 2020
    • Caterpillar Inc.
    • Kegan Jon Luick
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Application

    Rotor Pair for a Compression Block of a Screw Machine
    • Publication number 20200040894
    • Publication date Feb 6, 2020
    • KAESER KOMPRESSOREN SE
    • Gerald Weih
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    IMPROVEMENTS IN ROTARY CLAW PUMPS
    • Publication number 20200032799
    • Publication date Jan 30, 2020
    • THE QUEENSTOWN TRUST
    • John FLEMING
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Screw Compressor for a Utility Vehicle
    • Publication number 20190390672
    • Publication date Dec 26, 2019
    • Gilles HEBRARD
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    OPTIMIZED HELIX ANGLE ROTORS FOR ROOTS-STYLE SUPERCHARGER
    • Publication number 20190383287
    • Publication date Dec 19, 2019
    • Eaton Intelligent Power Limited
    • Matthew G. Swartzlander
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    MULTI-STAGE ROTARY LOBE PUMP
    • Publication number 20190376515
    • Publication date Dec 12, 2019
    • Leybold GmbH
    • Dieter Kolvenbach
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    MULTI-STAGE VACUUM BOOSTER PUMP COUPLING
    • Publication number 20190368354
    • Publication date Dec 5, 2019
    • Edwards Limited
    • Michael Henry North
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    FLUID MACHINE WITH HELICALLY LOBED ROTORS
    • Publication number 20190331113
    • Publication date Oct 31, 2019
    • Carrier Corporation
    • Richard T. Pandzik
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    SCREW-TYPE VACUUM PUMP
    • Publication number 20190203711
    • Publication date Jul 4, 2019
    • Leybold GmbH
    • Thomas DREIFERT
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    ACTIVE HYDRAULIC RIPPLE CANCELLATION METHODS AND SYSTEMS
    • Publication number 20190162179
    • Publication date May 30, 2019
    • ClearMotion, Inc.
    • Colin Patrick O'Shea
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...