F04C 2/22

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Description

Class  F04C : ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS


Subclass 2/22: Rotary-piston machines or pumps (with non-parallel axes of co-operating members F04C 3/00; with the working-chamber walls at least partly resiliently deformable F04C 5/00; with fluid ring or the like F04C 7/00; rotary-piston pumps specially adapted for elastic fluids F04C 18/00, F04C 19/00; rotary-piston machines or pumps in which the working-fluid is exclusively displaced by, or exclusively displaces, one or more reciprocating pistons F04B) of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth-equivalents than the outer member

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
12228132 Variable displacement gerotor pumpApr 18, 23Feb 18, 25Not available
12158149 Fluid transfer apparatusOct 04, 19Dec 03, 24KOREA ATOMIC ENERGY RESEARCH INSTITUTE
11988208 Sealing in helical trochoidal rotary machinesOct 07, 22May 21, 24Rotoliptic Technologies Incorporated
11867179 Fluid transfer apparatus with a plurality of rotor housings arranged at different angularity with the neighboring rotor housingsJul 03, 19Jan 09, 24Korea Atomic Energy Research Institute
11841019 Rotary piston compressor and system for temperature conditioning with rotary piston compressorMar 09, 21Dec 12, 23BorgWarner Inc.
11608827 Helical trochoidal rotary machines with offsetMar 10, 21Mar 21, 23Rotoliptic Technologies Incorporated
11566618 Rotary pump driven medicament delivery deviceAug 16, 18Jan 31, 23MEDICO INVEST AG
11519406 Oil pump having housing with seal portionNov 25, 20Dec 06, 22AISIN CORPORATION
11499550 Sealing in helical trochoidal rotary machinesOct 11, 20Nov 15, 22Rotoliptic Technologies Incorporated
11306720 Helical trochoidal rotary machinesMar 10, 21Apr 19, 22Rotoliptic Technologies Incorporated
11047382 Variable displacement gear pumpJan 02, 20Jun 29, 21Not available
10844859 Sealing in helical trochoidal rotary machinesFeb 29, 20Nov 24, 20Rotoliptic Technologies Incorporated
10837444 Helical trochoidal rotary machines with offsetFeb 29, 20Nov 17, 20Rotoliptic Technologies Incorporated
10801324 Double-working-medium expander used for two-stage organic Rankine cycleJul 24, 15Oct 13, 20Tianjin University
10617807 Rotary-piston pumpJul 09, 15Apr 14, 20Rheinisch-Westfaelische Technische Hochschule Aachen
10463989 Mud pump and vacuum gas extraction systemJul 31, 18Nov 05, 19Baker Hughes, a GE company, LLC
RE47590 Pump with conveying chamber formed in outer rotor surfaceApr 14, 14Sep 03, 19Quantex Patents Limited
10087758 Rotary machineJun 04, 14Oct 02, 18Rotoliptic Technologies Incorporated
10035083 Mud pump and vacuum gas extraction systemMar 11, 16Jul 31, 18BAKER HUGHES, A GE COMPANY, LLC
9958367 Apparatus for measuring rheological parameters and methods for its operationApr 09, 14May 01, 18Indian Institute of Technology Madras

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Recent Publications

Publication #TitleFiling DatePub DatePatent Owner
2024/0425,192 TURBO-COMPOUNDED ENGINE WITH EXHAUST DUCT ACOUSTIC ARRANGEMENTJun 26, 23Dec 26, 24Not available
2024/0280,099 Sealing In Helical Trochoidal Rotary MachinesApr 18, 24Aug 22, 24Not available
2021/0156,379 PUMP BODY ASSEMBLY, FLUID MACHINERY, AND HEAT EXCHANGE DEVICEDec 13, 18May 27, 21Not available
2019/0309,747 Screw Compressor for a Utility VehicleSep 19, 17Oct 10, 19Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH

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Patents Issued To Date - By Filing Year

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