Abstract: A rotor is eccentrically mounted in a bore of a housing and formed with radial slots in which vanes are slidably retained. An oil passageway leads from an oil sump through the radially inner portions of the slots to a fluid inlet passageway, the oil sump communicating with an oil separation chamber which constitutes part of a fluid outlet passageway. The high pressure in the oil separation chamber forces oil through the oil passageway to lubricate the vanes and urge the vanes into sealing engagement with the inner wall of the bore. Oil sucked from the inlet passageway into the bore and entrained in the working fluid lubricates the outer ends of the vanes and flows into the oil separation chamber. The fluid outlet passageway is formed so that the fluid flow path reverses direction in the oil separation chamber. The oil entrained in the fluid is unable, due to its higher density and inertial force, to negotiate the reversal of direction, is thereby separated from the fluid and returned to the oil sump.

Abstract: A rotary, sliding vane compressor is provided with means for supplying a relatively small, predetermined quantity of an incompressible fluid, such as lubricating oil, underneath the vanes. The fluid is injected at a point while the vanes are collapsing within the vane pockets formed within the rotor and is trapped underneath the vane during its movement to the contact point thereby resisting the collapse of the vane so as to hold the vane tip in continuous engagement with the stator surface in the compression cavity. The means for supplying the fluid underneath said vanes includes a device for interrupting flow of lubricant from a sump to the interior of the compressor housing thereby controlling or metering the lubricant and also preventing reverse rotation of the compressor rotor caused by oil pressure under the vanes forcing the vane tips to follow the curvature of the cylinder wall in a backward direction.

Abstract: The invention discloses a vane-type rotary machine of the type in which at any angular position of a rotor which has a plurality of vanes slidably fitted into the radial vane slots and is rotated in a cam ring, the satisfactory contact of the tip of each vane with the inner surface of the cam ring may be ensured so that the discharge or intake through the ports formed through the side wall of the cam ring may be carried out with maximum efficiency.

Abstract: A working member, i.e., an eccentric drive ring having internal teeth, orbits about a driven pinion having a lesser number of teeth to achieve gear reduction. Hydraulically expressed divider vanes on the orbiting drive ring engage the inner periphery of a surrounding fixed ring to define working chambers between the outer periphery of the drive ring and the inner periphery of the fixed ring. Port plates on opposite sides of the drive ring are respectively exposed to high and low pressure fluid. Valving occurs when slots on opposite sides of the drive ring are exposed to ports on the port plate as the result of the orbital movement of the drive ring, so as to establish fluid flow paths to and from the working chambers.

Abstract: A vane-pump or motor which includes a rotor equipped with vanes slidable within at least approximately radial slots and with an endless cam surface which surrounds the rotor and together with the same forms a sickle-shaped working space; the cam surface is so shaped that it includes a radially outwardly directed inclination with respect to a circular cam concentric to the center of rotation of the rotor which forms the suction area and in other circumferential areas, it includes a radially inwardly directed inclination, forming the discharge area; two base plates are provided which axially sealingly enclose the rotor together with the vanes and the cam ring and which axially delimit the working space or spaces; internal channels connect the suction or inlet area of the working space with the feed line and the discharge area of the working space with the discharge channel; an unobstructed working medium supply is also provided out of the channel subjected to the higher pressure level which leads to the slot bo

Abstract: A rotary vane pump can be constructed so as to utilize an auxiliary inlet port which is used to convey one fluid under pressure to the interior of the pump where such fluid is mixed with fluid drawn into the pump in a normal manner. In the disclosed structure the fluid conveyed to the pump through the auxiliary inlet port is used to force vanes carried by the pump rotor outwardly into contact with an eccentric wall in the pump stator. The vanes are preferably formed and mounted on the rotor so that the fluid conveyed through the auxiliary inlet port passes into the space between the rotor and the stator by flowing alongside the vanes. A structure of this type is preferably utilized with one of the inlet fluids being water and the other of the inlet fluids being a gaseous mixture containing a high proportion of ozone.