Patents
Sitemap › F04 - Positive-displacement machines for liquids; Pumps for liquids or elastic fluids › F04C - Rotary-piston, or oscillating-piston, positive-displacement machines for liquids; Rotary-piston, or oscillating-piston, positive-displacement pumps › F04C 2 - Rotary-piston machines or pumps
Patents for F04C 2 - Rotary-piston machines or pumps (14,296)
08/1981
08/11/1981CA1106696A1 Gear pump
08/04/1981US4281974 Seal mechanism in gear pumps or motors
07/1981
07/15/1981EP0031908A2 Method and circuit for controlling a plurality of output values as a function of a plurality of input values
07/08/1981EP0031324A1 Positive pressure pump or motor.
06/1981
06/30/1981CA1103989A1 Geared pump
06/25/1981WO1981001729A1 Drive transmission means
06/23/1981US4274817 Rotary vane pump with inlet and discharge ports in end sealing plates
06/16/1981US4273521 Drive arrangement
06/09/1981US4272227 Variable displacement balanced vane pump
06/02/1981CA1102178A1 Eccentric disc pump
05/1981
05/28/1981WO1981001446A1 Vane pump
05/27/1981EP0029356A1 Pressure gradient controlled rotary hydraulic machine
05/19/1981US4268232 Intermeshing gear pump with sealing means comprising two concentric slide rings
05/19/1981CA1101274A1 Liquid immersible scroll pump
05/14/1981WO1981001315A1 Contaminant resistant gear pumps and motors
05/13/1981EP0028349A1 Hydrostatic gear machine
05/06/1981EP0028197A1 Hydraulic rotary device
05/06/1981EP0028061A1 Gear pump or motor
05/05/1981US4265606 Fositive displacement pulse free rotary fluid pump
05/05/1981US4265605 Rotary pump with wedge roller eccentric means driving the rotor
05/05/1981US4265602 Gear pump with low pressure shaft lubrication
05/05/1981US4265323 Direct bit drive for deep drilling tools
04/1981
04/28/1981US4264288 Gerotor machine with flow control recesses in the inner gear member
04/28/1981US4264214 Gear motor/mixer
04/28/1981CA1099990A1 Hydrostatic gear machine
04/14/1981US4261691 Rotary screw machine with two intermeshing gate rotors and two independently controlled gate regulating valves
03/1981
03/31/1981US4259044 Fuel pump assembly
03/31/1981US4259043 Thrust bearing/coupling component for orbiting scroll-type machinery and scroll-type machinery incorporating the same
03/17/1981US4256443 Rotary vane-type engine throttle channels communicating between adjacent working spaces
03/10/1981US4255093 Combined lift and metering pump
03/03/1981US4253808 Hydraulic pumps
03/03/1981US4253807 Fluid pressure operated wheel drive
03/03/1981US4253805 Rotary compressor
02/1981
02/19/1981WO1981000437A1 Hydraulic motor
02/17/1981US4251192 Rotary pump with symmetrical by-pass and rotor with resiliently mounted vanes
02/10/1981US4249750 Fluid-power converter with paired rotators providing seals and displacement paths and pump-motor utilizing same
01/1981
01/28/1981EP0022782A1 Gear machine.
01/28/1981EP0022781A1 Gear machine.
01/27/1981US4247268 Rotary vane machine with radial vane constraining members
01/22/1981WO1981000133A1 Positive pressure pump or motor
01/20/1981US4245969 Pump
01/07/1981EP0022103A1 A rotary vane machine
01/07/1981EP0020354A1 Manifolded multiple hydraulic pump structure.
01/06/1981US4242887 Shaft coupling
12/1980
12/30/1980US4242067 Hydraulic screw machine with balance plunger
12/30/1980US4242066 Rotary pumps and motors and thrust plates therefor
12/30/1980US4242064 Rotary fluid pump with eccentrically moving pumping sleeve
12/30/1980US4241484 Method for assembling a fuel pump and motor
12/16/1980US4239470 Thick stock pump having flexible blades
12/16/1980US4239468 Apparatus for controlling pressure distribution in gear pump
11/1980
11/26/1980EP0019605A1 A rotary vane machine
11/18/1980US4234296 Screw compressor
11/14/1980EP0020354A4 Manifolded multiple hydraulic pump structure.
11/12/1980EP0018359A1 Apparatus for transforming pressure and/or flow motion of a fluid to rotational motion of a body, or vice versa
11/11/1980US4233005 Hydraulic gear pump with recesses in non-working gear flanks
11/11/1980US4233003 Rotary pump
11/04/1980US4231726 Gear pump having fluid deaeration capability
10/1980
10/29/1980EP0018216A1 Reversible gear pump or motor and diverter plates therefor
10/14/1980US4227869 Intermeshing pump rotor gears with involute and linear flank portions
10/01/1980EP0016584A1 Lubrication and cooling system for a high speed ultracentrifuge drive assembly
09/1980
09/30/1980US4225296 Gear pump with transmission gearwheel adjustment
09/30/1980CA1086568A1 Flow diverter pressure plate
09/23/1980CA1086277A1 Pair of rotors for a rotary piston pump
09/23/1980CA1086135A1 Gear pump
09/18/1980WO1980001936A1 Planetary gear mechanism
09/18/1980WO1980001935A1 Rotary-piston machine
09/16/1980US4222719 Reversible unidirectional fluid flow pump
09/09/1980US4221553 Oribital pump with fluid flow control
09/09/1980US4221036 Method of securing a Moineau pump stator
09/09/1980CA1085126A1 Multi-shaft screw extruder
09/04/1980WO1980001785A1 Fluid-power converter with paired rotors
08/1980
08/26/1980US4219313 Commutator valve construction
08/05/1980US4216270 Machine parts of powdered metal
07/1980
07/29/1980CA1082681A1 Direct drive bit for deep drilling tools
07/22/1980US4213746 Internal gear hydraulic device with balancing recesses in the housing and crescent shaped separation member
07/15/1980US4212603 Rotary vane machine with cam follower retaining means
07/10/1980WO1980001401A1 Manifolded multiple hydraulic pump structure
07/09/1980EP0013277A1 A reversible unidirectional fluid flow pump
07/08/1980US4211521 Eccentric disc pump
07/08/1980CA1081190A1 Rotary fluid pump or compressor
07/08/1980CA1081043A1 High-pressure rotary fluid-displacing machine
06/1980
06/25/1980EP0012614A1 Improvements in scroll type fluid compressor units
06/25/1980EP0012328A1 Gear pump for water or the like
06/24/1980US4209001 Orbital internal combustion engine
06/10/1980US4207038 Power steering pump
06/10/1980CA1079121A1 Pump assembly
05/1980
05/27/1980US4204817 Torque-amplifying hydraulic servo-mechanism, particularly for power steering systems in motor vehicles
05/27/1980US4204816 Discharge and pressure relief ports for mechanisms with involute shaped vanes
05/20/1980CA1077780A1 Method for sealing off in the radial direction a volume of fluid bound between a stator and a rotor and an arrangement for carrying out said method
05/13/1980US4202657 Fluid pump
05/06/1980US4201526 Pivoted blade between rotor and stator having arcuate sections
04/1980
04/29/1980US4200427 Reversible gear pump with invariant flow direction
04/22/1980US4199308 Axial compliance/sealing means for improved radial sealing for scroll apparatus and scroll apparatus incorporating the same
04/22/1980US4199304 Positive displacement compact slipper pump
04/22/1980US4198818 Primary pump drive for automatic motor vehicle transmissions
04/15/1980US4198195 Rotary fluid pump or compressor
04/15/1980US4198194 Rotary piston machine with wear surface on rotary valve member
04/03/1980WO1980000592A1 Gear machine
04/03/1980WO1980000591A1 Gear machine
04/02/1980EP0009355A1 Scroll-type fluid compressor units
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