| Patents for F04C 2 - Rotary-piston machines or pumps (14,296) |
|---|
| 01/04/1989 | EP0297960A2 Fluid-pumping apparatus in a well |
| 01/04/1989 | EP0297147A1 Internal gear pump as a lubrication pump |
| 12/27/1988 | US4793781 External and internal rotor machine having internal axes and circumferential reinforcement web |
| 12/22/1988 | DE3718866A1 Pumpe Pump |
| 12/22/1988 | DE3718863A1 Screw pump |
| 12/20/1988 | US4792296 Scroll compressor with pressure-equalizing passage and gas vent conduit in main shaft |
| 12/20/1988 | US4792294 Two-stage screw auger pumping apparatus |
| 12/20/1988 | US4792292 Ink pump system |
| 12/15/1988 | WO1988009877A1 Pump |
| 12/15/1988 | DE3813132A1 Vane-cell pump |
| 12/15/1988 | DE3718311A1 Multiple-piston flywheel rotary pump |
| 12/14/1988 | EP0294399A1 Swivelling vane pump. |
| 12/07/1988 | CN88102029A Oil-allocation type gear pump |
| 12/07/1988 | CN87211905U Gear pump for non-lubricating liquid |
| 12/06/1988 | US4789317 Rotary vane oil pump and method of operating |
| 12/06/1988 | US4789315 Positive displacement machine, more particularly pump, and method for fabricating such pump |
| 11/30/1988 | EP0292594A1 Stator for a Moineau pump |
| 11/29/1988 | US4787332 Adhesive dispensing pump control system |
| 11/22/1988 | CA1245100A1 Rotary vane pump |
| 11/02/1988 | CN87102829A Floating shaft type gear pump-gear motor |
| 11/02/1988 | CN87101507A Conical ring plate rotating piston pump |
| 11/01/1988 | US4781552 High pressure hydraulic generator receiver for power transmission |
| 11/01/1988 | CA1243898A1 Vane slots for a fluid power converter |
| 10/27/1988 | DE3712270A1 Displacing-body machine |
| 10/25/1988 | US4780071 Internal gear machine having segmented, pivotal filler members |
| 10/25/1988 | US4780070 Gear pump having multiple outputs |
| 10/25/1988 | US4780069 Directlly actuated vane-type pump |
| 10/19/1988 | CN87102721A Equal width curve pump |
| 10/18/1988 | US4778363 Internal-gear machine having segmented, pivotal filler members |
| 10/18/1988 | US4778361 Variable output gerotor pump |
| 10/18/1988 | US4778080 Metering dispenser of a screw pump |
| 10/12/1988 | CN87102280A A double-eccentric center internal axle revolving piston machinery |
| 10/05/1988 | EP0284712A2 Vane pump |
| 09/29/1988 | DE3707722A1 Rotor pump, especially for pumping liquids containing solids |
| 09/28/1988 | EP0284241A2 Vane pump |
| 09/28/1988 | EP0284226A2 Variable output oil pump |
| 09/28/1988 | EP0283755A1 Apparatus for distributing inhomogeneous liquids, notably liquid manure |
| 09/27/1988 | US4773837 Screw pump |
| 09/27/1988 | US4773836 Rotary vane pump |
| 09/27/1988 | US4773834 Progressive cavity pump |
| 09/27/1988 | CA1242424A1 Double-eccentric rotary apparatus with minimal chamber volume |
| 09/20/1988 | US4772190 Vane cell pump having resilient sealing means biasing the pressure plate |
| 09/20/1988 | US4772187 Rotary pump |
| 09/20/1988 | US4772177 Screw pump |
| 09/20/1988 | CA1242183A1 Downhole sectional screw motor and method of oriented assembly of working members thereof using a mounting fixture |
| 09/14/1988 | EP0282358A2 Improved inlet for a positive displacement pump |
| 09/07/1988 | EP0281369A2 Vane type variable displacement motor |
| 09/07/1988 | CN88101522A Apparatus for quantitative extrusion of food raw materials |
| 08/31/1988 | EP0280518A2 An apparatus for quantitatively extruding food material |
| 08/31/1988 | EP0280294A2 Test drill string for deep wells |
| 08/30/1988 | US4767296 Trochoidal toothed oil pump with thin discharge channel communicating with discharge chamber |
| 08/30/1988 | US4767293 Scroll-type machine with axially compliant mounting |
| 08/30/1988 | US4767292 Electrical commutation apparatus |
| 08/24/1988 | EP0279413A2 Motor lubrication with no external case drain |
| 08/24/1988 | CN87100632A Variable-displacement gear pump |
| 08/10/1988 | EP0277861A1 Screw-type hydraulic motors |
| 08/09/1988 | US4762480 Rotary pump |
| 08/09/1988 | US4762479 Motor lubrication with no external case drain |
| 08/03/1988 | EP0276680A2 Two-speed valve in-star motor |
| 08/03/1988 | CN87100432A 滚柱泵 Roller pump |
| 08/02/1988 | US4761125 Twin-shaft multi-lobed type hydraulic device |
| 08/02/1988 | US4760696 Fuel system for gas turbine engines |
| 07/28/1988 | WO1988005501A1 Gear machine (pump or engine) |
| 07/26/1988 | US4759182 Steering control unit with flow amplification |
| 07/19/1988 | US4758141 Vane pump with flexible tongue valve |
| 07/19/1988 | US4758137 Vane type variable displacement motor |
| 07/12/1988 | US4756676 Gerotor motor with valving in gerotor star |
| 06/30/1988 | WO1988003229A3 Swivelling impeller pump |
| 06/28/1988 | CA1238618A1 Vane pump |
| 06/16/1988 | DE3641855A1 Adjustable stator for eccentric screw pumps |
| 06/15/1988 | CN87107847A Device for measuring, pumping, suction or compression of liquids or liquefied gases |
| 06/14/1988 | US4750867 Regulating pump |
| 06/08/1988 | CN87213968U Variable displacement vane type pump with hydraulic float side plates |
| 06/07/1988 | CA1237601A1 Lobe rotor pumps |
| 06/01/1988 | EP0269474A1 Hydrostatic component with axially movable vanes and axial pressing |
| 06/01/1988 | EP0269165A2 Liquid flow meter |
| 05/31/1988 | US4747763 Rotor assembly of roots pump |
| 05/31/1988 | US4747762 Fluid machine |
| 05/31/1988 | US4747744 Magnetic drive gerotor pump |
| 05/25/1988 | CN87211223U Integrated double oscillating spiral rod pump |
| 05/11/1988 | DE3638022A1 Rotary piston pump |
| 05/10/1988 | US4743180 Reversible gear-type pump |
| 05/05/1988 | WO1988003229A2 Swivelling impeller pump |
| 05/04/1988 | EP0265774A2 Sliding-vane rotary compressor |
| 05/03/1988 | US4741681 Gerotor motor with valving in gerotor star |
| 04/27/1988 | EP0264778A2 Vane pump |
| 04/27/1988 | EP0264490A1 Rotor and shaft equal rotation |
| 04/26/1988 | US4740142 Variable capacity gear pump with pressure balance for transverse forces |
| 04/26/1988 | US4740140 Pump having integral switch and bypass valve |
| 04/26/1988 | CA1235605A1 Toroidal motor/pump |
| 04/19/1988 | US4738603 Hydraulic vane pump |
| 04/13/1988 | CN87201626U Hydraulic oil pump |
| 04/12/1988 | US4737089 Eccentric pump with lock valve, mainly for the lubricant circulation of drives |
| 04/07/1988 | WO1988002438A1 Rotary machine |
| 04/07/1988 | DE3631527C1 Gear pump |
| 04/06/1988 | EP0262721A1 A rotary engine of the type having a planetary rotor with rotor and shaft equal rotation |
| 04/06/1988 | EP0262189A1 High-pressure hydraulic generator-receiver for power transmission. |
| 03/31/1988 | DE3632155A1 Engine or machine |
| 03/30/1988 | EP0261757A2 Internal axis rotary piston machine with rotary valve |
| 03/24/1988 | DE3724089A1 Vane pump for conveying foodstuffs |