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| Number | Title | Issue Date |
| 7179070 | Variable capacity pump/motor A variable capacity pump/motor has a meshing internal and external gear set disposed between an upper mandrel and a lower mandrel, each including a flange extending towards the gears to divide a pump/motor chamber into suction and discharge chambers. The outer gear ... | 02/20/2007 |
| 6984114 | Two-step self-modulating scroll compressor A self-modulating scroll compressor includes a pair of valves. A first valve moves to a low capacity position when the pressure differential is below a predetermined amount. A second valve moves to a low capacity position when the suction pressure is above a predete... | 01/10/2006 |
| 6402487 | Control system for variable exhaust nozzle on gas turbine engines The present invention relates to a system that provides independently operated or controlled circuits in a single device. An exemplary application adapts a variable displacement roller pump into an engine geometry control system that uses one circuit of t... | 06/11/2002 |
| 6022201 | Hydraulic vane pump with flexible band control A variable pump or motor is providing including a housing with inlet and outlet ports and a vaned rotor, the vanes being extensible against a shape controlled freely rotatable flexible band within the housing.... | 02/08/2000 |
| 5618165 | Variable displacement and constant pressure pump A pump comprising a pump housing (12) and a rotor (28) driven by a shaft (10), said rotor having at least two outwardly spring-biased elements (30). These lie in contact with the wall of a chamber (27) surrounding the rotor and transport, during rotation ... | 04/08/1997 |
| 5524587 | Sliding vane engine A sliding vane engine, where the vanes slide with at least of one of an axial and radial component of vane motion, and where the compression ratio of the engine may be variably controlled. The engine includes a stator and a rotor in relative rotation, and... | 06/11/1996 |
| 5399077 | Variable capacity vane pump The invention relates to a vane pump, the volumetric delivery of which can be regulated by varying the axial width of the pump working chambers. The vanes are carried in an axially fixedly disposed vane-carrier which rotates with the rotor. An axial slide... | 03/21/1995 |
| 5306127 | Fluid pump with axially adjustable gears A fluid pump is arranged to employ cooperating gears that are arranged for axial displacement relative to one another, whereupon a volumetric chamber positioned between a surrounding housing and one of a plurality of inter-nesting first and second cylindr... | 04/26/1994 |
| 4812111 | Variable displacement rotary fluid machine An internally meshing gear-pump, or motor comprises inlet and outlet ports 27,28 for the working fluid through a sealing plate 5 mounted on the shaft 1, an externally-toothed gear 2 is longitudinally displaceable relative to internally-toothed gears 3,4 t... | 03/14/1989 |
| 4516919 | Capacity control of rotary vane apparatus A capacity control arrangement for a rotary vane fluid displacement apparatus, such as a rotary vane compressor, having a vane retaining means that normally engages and retains the vanes in their retracted or nonworking position within the rotor defined g... | 05/14/1985 |
| 4472119 | Capacity control for rotary compressor A capacity control arrangement for a rotary vane fluid displacement apparatus, such as a rotary vane compressor, having a vane retaining means that may be moved to engage and retain the vanes in their retracted or nonworking position within the rotor defi... | 09/18/1984 |
| 4219314 | Rolling piston rotary compressor A rotary compressor 10 of the rolling piston type is shown wherein the rolling cylindrical piston 28 is forced into rolling contact with the cylindrical interior 15 of the compressor chamber by a hydraulic piston 78 and cylinder 64 arrangement providing a... | 08/26/1980 |
| 4188176 | Variable displacement rotary fluid energy converter An elongate rotor operated by a crank and rotating within a generally triangular chamber to act as a positive displacement pump or fluid motor. Sliding the rotor axially through a close-fitting hole in a plate which is free to move radially but not axiall... | 02/12/1980 |
| 4008982 | Rotary fluid energy converter A mechanism with only two dynamic components, in which rotating crank motion is converted to intermittent rotation of an elongate rotor within a generally triangular chamber and vice versa. When the rotor and chamber are enclosed, the mechanism becomes a ... | 02/22/1977 |
