Patents
Sitemap › F03 - Machines or engines for liquids; Wind, spring, or weight motors; Producing mechanical power or a reactive propulsive thrust, not otherwise provided for › F03C - Positive-displacement engines driven by liquids › F03C 2 - Rotary-piston engines
Patents for F03C 2 - Rotary-piston engines (2,448)
12/1991
12/10/1991US5071330 Roller-vane hydraulic machine
12/10/1991US5071327 Two speed gerotor motor with centrally located valve and commutator
11/1991
11/27/1991EP0457796A1 Positive displacement wing motor
10/1991
10/16/1991CN1014346B Rotary compressor
10/15/1991US5056994 Hydrostatic rotary piston machine having interacting tooth systems
10/02/1991DE4115642A1 Hydraulic pump with radially sliding vanes - has housing with internal rib which presses the vane inwards
10/01/1991US5052905 Gear motor with valve controlled pressure biased end-plate seal
09/1991
09/18/1991EP0377617B1 Gearwheel motor
09/11/1991EP0445584A1 Planetary gear pump or motor and process for radial force compensation
09/04/1991CN1054297A Balanced planetary gear pump
08/1991
08/21/1991CN1013608B Tangent multi-action rotaty hydraulic motor with oscillating gear ring
08/14/1991DE4004142A1 IC-piston engine - has adjustable displaced volume with drive shaft encompassed by eccentric wheels rotatable in relation to drive shaft
07/1991
07/10/1991CN2080571U Rotary energy-saving engine with fluid external combustion and changeable path
06/1991
06/18/1991US5024590 Rotary engine of the type having a planetary rotor with rotor and shaft equal rotation
06/05/1991EP0430789A1 Rotary machine with rolling piston
05/1991
05/29/1991CA2029796A1 Rotary machine with a rolling piston
05/21/1991US5017098 Power transmission
05/02/1991EP0424378A1 Rotator for crane-mounted working implements, especially tree-processing units.
04/1991
04/23/1991US5009582 Rotary fluid pressure device and improved stationary valve plate therefor
04/10/1991EP0421616A2 Hydraulic device
02/1991
02/13/1991EP0412403A2 Rotary fluid pressure device and improved stationary valve plate therefor
02/13/1991CN1011610B Alternative stepped hydraulic prime mover and pump
02/12/1991US4992034 Low-speed, high-torque gerotor motor and improved valving therefor
02/05/1991US4989652 Rotor for crane-mounted working implements, especially tree-processing units
01/1991
01/16/1991EP0408011A1 Gerotor motor and improved pressure balancing therefor
01/01/1991US4981423 Hydraulic motor with wobble-stick and brake assembly
01/01/1991US4981422 Gerotor device having a valve opening diameter smaller than the drive connection diameter
12/1990
12/11/1990US4976594 Gerotor motor and improved pressure balancing therefor
12/05/1990CN1047551A Power transmission
11/1990
11/28/1990EP0399387A2 Rotary vane machine
11/20/1990US4971536 Rotor for fluidic apparatus
11/07/1990CN1046779A Low-speed, high-torque gerotor motor and improved valving therefor
11/07/1990CN1010337B Large internally tangent arc unloading vane-type pump or motor
11/06/1990US4968233 Hydraulic gear motor
10/1990
10/31/1990EP0394821A2 Valve for gerotor motor
10/16/1990US4963080 Rotary hydraulic vane machine with cam-urged fluid-biased vanes
10/02/1990US4960373 Fluid motor rotor assembly
09/1990
09/27/1990DE3909259A1 Hydraulic motor with axial working connections
09/26/1990CN1045628A Power transmission
09/19/1990EP0388127A1 Fluid motor rotor assembly
09/19/1990EP0387713A2 Gerotor type hydraulic motor or pump
09/05/1990EP0385211A1 Rotary hydraulic machine
08/1990
08/29/1990EP0384335A1 Rotary hydraulic machine
08/23/1990WO1990009510A1 Positive displacement wing motor
07/1990
07/18/1990EP0377617A1 Gearwheel motor.
05/1990
05/09/1990EP0367046A1 Hydrostatic rotary piston machine
04/1990
04/18/1990EP0213154B1 Rotary motion fluid apparatus
04/18/1990CN1007648B Wearless sealing type power machine with sliding blade
04/18/1990CN1007646B Radial-movable variable-dispacement gear pump (motor)
04/17/1990US4917585 Gerotor motor or pump having sealing rings in commutator members
03/1990
03/14/1990CN1040417A 旋转压缩机 Rotary compressor
02/1990
02/15/1990DE3916623A1 Rotary hydraulic pump or motor - has coupling wobble bar of larger dia. than opening in rotary valve
02/14/1990EP0354867A2 Scroll type compressor
12/1989
12/27/1989EP0347738A2 Constant radial clearance gerotor design
12/27/1989CN1038335A Tangent multi-action rotary hydraulic motor with oscillating gear-ring
11/1989
11/08/1989CN1037020A 螺旋柱塞机 Spiral piston machine
11/08/1989CN1037019A Gear type variable rate pump or motor
11/08/1989CN1005742B Rotary fluid pressure device having free-wheeling capability
11/02/1989WO1989010487A1 Roller-blade hydraulic machine
10/1989
10/10/1989US4872819 Rotary gerotor hydraulic device with fluid control passageways through the rotor
08/1989
08/08/1989CA1258275A1 Hydraulic seals
07/1989
07/13/1989WO1989006216A1 Rotator for crane-mounted working implements, especially tree-processing units
07/12/1989CN2040959U Screw plunger machine
06/1989
06/06/1989CA1255187A1 Rotary motion fluid apparatus
05/1989
05/09/1989US4827800 Multi-groove and spline connection between gear shaft of a rotary piston machine with internal axis and method of making such a multigroove spline connection
04/1989
04/26/1989EP0199741B1 Pinion motor
04/18/1989US4822260 Device for controlling fluid supply to a rotary piston machine
04/04/1989US4818196 Variable capacity vane-type motor having a control channel selectively communicating with the work chamber
03/1989
03/23/1989WO1989002515A1 Gearwheel motor
03/08/1989CN2033861U Planetary gear reduction type high power motor
03/07/1989US4809590 Sealing arrangement for rotary vane-type motors
02/1989
02/23/1989DE3726800A1 Fluegelzellenmaschine Fluegelzellenmaschine
02/21/1989US4806085 Rotary hydraulic piston motor with fluid path in pistons for inlet pressure
11/1988
11/22/1988US4785714 Positive-displacement fluid motor having self-stopping function, and method and control circuit for stopping the motor
11/01/1988CA1244073A1 Thrust bearing and seal assembly
11/01/1988CA1243898A1 Vane slots for a fluid power converter
09/1988
09/27/1988CA1242424A1 Double-eccentric rotary apparatus with minimal chamber volume
09/07/1988EP0281369A2 Vane type variable displacement motor
08/1988
08/24/1988EP0279413A2 Motor lubrication with no external case drain
08/09/1988US4762479 Motor lubrication with no external case drain
08/03/1988EP0276680A2 Two-speed valve in-star motor
07/1988
07/19/1988US4758137 Vane type variable displacement motor
06/1988
06/15/1988EP0270740A2 Method of controlling a fluid motor
06/07/1988CA1237602A1 Rolling rotor volumetric motor
05/1988
05/03/1988US4741681 Gerotor motor with valving in gerotor star
04/1988
04/27/1988EP0264490A1 Rotor and shaft equal rotation
04/06/1988EP0262721A1 A rotary engine of the type having a planetary rotor with rotor and shaft equal rotation
03/1988
03/23/1988CN86100403B Rotative piston type hydraulic motor
03/09/1988CN86103779A Wearless sealing type power machine with sliding blade
12/1987
12/29/1987US4715798 Rotary fluid pressure device
12/16/1987CN86103891A Alternative stepped hydraulic prime mover and pump
12/08/1987US4711619 Vane fuel pump having reduced displacement at high speeds
11/1987
11/25/1987EP0246567A2 Reversible system for the transfer of energy from a fluid to a rotating shaft
11/11/1987EP0244672A2 Gerotor motor with valving in gerotor star
11/03/1987US4704096 Crowned splines and defination of root radius therefor
10/1987
10/06/1987US4697997 Rotary gerotor hydraulic device with fluid control passageways through the rotor
09/1987
09/30/1987CN86100534A Globular variable-displacement pump
09/09/1987CN86101263A Cycloidal pinion engaged pair
09/08/1987US4692105 Roller displacement motor
08/1987
08/05/1987EP0223788A4 Hydraulic motor.
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