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Patent (1252204) 1252204
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mechanical engineering (1252206) 1252206
blasting (1252204) 1252204
heating (1252204) 1252204
lighting (1252204) 1252204
weapons (1252204) 1252204
positive displacement machines for liquids (1140666) 1140666
pumps for liquids or elastic fluids (1140666) 1140666
pumps (478348) 478348
non-positive displacement pumps (454893) 454893
rotary-piston, or oscillating-piston, positive-displacementmachines for liquids (239668) 239668
rotary-piston, or oscillating-piston, positive-displacementpumps (239668) 239668
general tagging of cross-sectional technologies spanning over several sections of the ipc (201133) 201133
general tagging of new technological developments (201133) 201133
technical subjects covered by former uspc cross-reference art collections [xracs] and digests (201133) 201133
indexing schemes relating to engines or pumps in varioussubclasses of classes f01-f04 (147082) 147082
engine plants in general (146366) 146366
machines or engines in general (146366) 146366
steam engines (146366) 146366
performing operations (146364) 146364
transporting (146364) 146364
technologies or applications for mitigation or adaptation againstclimate change (130378) 130378
machines or engines for liquids (128636) 128636
or a reactive propulsive thrust, not otherwise provided for (128636) 128636
producing mechanical power (128636) 128636
wind, spring weight and miscellaneous motors (128636) 128636
engineering elements and units (120239) 120239
general measures for producing and maintaining effectivefunctioning of machines or installations (120239) 120239
thermal insulation in general (120239) 120239
reduction of greenhouse gas [ghg] emissions, related to energygeneration, transmission or distribution (96161) 96161
indexing scheme relating to machines or engines other thannon-positive-displacement machines or engines, to wind motors,to non-positive displacement pumps, and to generating combustionproducts of high pressure or high velocity (90345) 90345
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generation (67190) 67190
non-positive displacement machines or engines, e.g. steamturbines (64103) 64103
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human necessities (52951) 52951
indexing scheme for aspects relating tonon-positive-displacement machines or engines, gas-turbines orjet-propulsion plants (48143) 48143
dynamo-electric machines (47201) 47201
pumping of fluid by direct contact of another fluid or byusing inertia of fluid to be pumped (47055) 47055
siphons (47055) 47055
fixed constructions (44465) 44465
rotary-piston or oscillating-piston machines or engines (42294) 42294
combined heating and refrigeration systems (36359) 36359
heat pump systems (36359) 36359
liquefaction solidification of gases (36359) 36359
manufacture or storage of ice (36359) 36359
refrigeration or cooling (36359) 36359
heat-pump systems (32299) 32299
refrigeration machines, plants or systems (32299) 32299
hygiene (30924) 30924
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physical or chemical processes or apparatus in general (30102) 30102
ranges (29110) 29110
ventilating (29110) 29110
vehicles in general (29089) 29089
climate change mitigation technologies related totransportation (27864) 27864
positive-displacement engines driven by liquids (26900) 26900
chemistry (26537) 26537
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testing (26205) 26205
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air intakes for jet-propulsion plants (25943) 25943
controlling fuel supply in air-breathing jet-propulsion plants (25943) 25943
gas-turbine plants (25943) 25943
technical subjects covered by former uspc cross-reference artcollections [xracs] and digests (25197) 25197
shafts (24483) 24483
valves (24346) 24346
actuating-floats (24344) 24344
cocks (24344) 24344
devices for venting or aerating (24344) 24344
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bearings (24027) 24027
elements or crankshaft mechanisms (24026) 24026
flexible shafts (24026) 24026
rotary bodies other than gearing elements (24026) 24026
supplying combustion engines in general, with combustiblemixtures or constituents thereof (23832) 23832
cylinders (23547) 23547
pistons (23546) 23546
sealings (23545) 23545
combustion engines in general (22780) 22780
internal-combustion piston engines (22780) 22780
air-conditioning, air-humidification, ventilation, use of aircurrents for screening (21523) 21523
devices for introducing media into, or onto, the body (21228) 21228
devices for producing or ending sleep or stupor (21228) 21228
devices for transducing body media or for taking media fromthe body (21228) 21228
earth drilling (20563) 20563
mining (20563) 20563
fluid-pressure actuators (20240) 20240
hydraulics or pneumatics in general (20240) 20240
gearing (19705) 19705
basic electric elements (18457) 18457
earth drilling, e.g. deep drilling (18205) 18205
obtaining oil, gas, water, soluble or meltable materials or aslurry of minerals from wells (18205) 18205
separation (17671) 17671
applying liquids or other fluent materials to surfaces, in general (17461) 17461
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Publication Date Publication Date
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11/2017
The invention relates to a displacement machine comprising a housing, a first rotor in the housing on a first shaft, a second rotor in the housing on a second shaft, synchronising means to synchronise... 
MECHANICAL ENGINEERING | PUMPS FOR LIQUIDS OR ELASTIC FLUIDS | WEAPONS | BLASTING | POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS | HEATING | LIGHTING | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
Patent
03/2020
A hydrostatic positive displacement machine has an adjustable swept volume, and has a lifting element, a rotor with positive displacement elements supported on the lifting element, and a hydraulic... 
MECHANICAL ENGINEERING | PUMPS FOR LIQUIDS OR ELASTIC FLUIDS | WEAPONS | BLASTING | POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS | PUMPS | HEATING | LIGHTING
Patent
09/2019
A conical screw compressor or pump comprising: an inner element configured to rotate around a first axis; and an outer element configured to rotate around a... 
MECHANICAL ENGINEERING | PUMPS FOR LIQUIDS OR ELASTIC FLUIDS | WEAPONS | BLASTING | POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS | HEATING | LIGHTING | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
Patent
08/2019
This positive-displacement machine is provided with: a guide cylindrical member; a reciprocating member that has a piston part that performs a reciprocating motion and a swinging motion in the guide cylindrical member... 
MECHANICAL ENGINEERING | PUMPS FOR LIQUIDS OR ELASTIC FLUIDS | WEAPONS | BLASTING | POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS | PUMPS | HEATING | LIGHTING
Patent
04/2018
A conical screw compressor or pump comprises an inner element configured to rotate around a first axis, an outer element configured to rotate around a second... 
MECHANICAL ENGINEERING | PUMPS FOR LIQUIDS OR ELASTIC FLUIDS | WEAPONS | BLASTING | POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS | HEATING | LIGHTING | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
Patent
02/2018
A geared positive-displacement machine (10), comprising a housing (11) provided with a suction port and with a discharge port, a pair of gearwheels (14, 15... 
MECHANICAL ENGINEERING | PUMPS FOR LIQUIDS OR ELASTIC FLUIDS | WEAPONS | BLASTING | POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS | HEATING | LIGHTING | ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
Patent
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