Abstract: The present invention relates to a rotary piston pump for conveying and/or metering liquid or pourable media. It consists of a pump casing (2) with a cylinder chamber (4) having a cylindrical inner periphery (6) into which open at least one inlet (8) and at least out outlet (10), and a rotary piston (20) rotating inside the cylinder chamber (4) which, together with at least one region of its outer peripheral surface (22) forms a seal with the inner peripheral surface (6) of the cylinder chamber (4) and is separated in regions from the inner peripheral surface (6) by a radial stroke distance. When the rotary piston rotates (arrow 70), an expanding working chamber (24) is formed in the region of the inlet (8) to draw the medium in and, on further rotation, contracts again in the region of the outlet to force the medium out.

Abstract: A multiple stage rotary compressor having a housing with a pump cavity, an orbiting ring piston in the cavity, a cylindrical post carried by the housing within the orbiting ring, a pair of vanes engaging the outer surface of the orbiting ring to define a pair of primary pumping chambers in the cavity and a second pair of internal vanes contacting the inner surface of the orbiting ring to define a pair of secondary pumping chambers and a capacity controller adapted to selectively disable each of the outer vanes to establish differing compressor pump capacities depending upon the operating requirements of the compressor.

Abstract: The invention concerns a vane pump for conveying bulk substances, in particular meat pastes, having a housing (4) with an inlet (6) and an outlet (10) for the bulk substance. Disposed inside the housing (4) is a rotor (14) displaying a rotatably-journaled, central driving element (16) and several moving vanes (20a to j), which are arranged on the central driving element, in its direction of rotation (C), one behind the other and at an angle to the direction of rotation (C), and commonly surrounded by a limiting wall (24) of the housing (4) running about in the direction of movement (C) of the vanes (20a to j), with the limiting wall (24) forming conveying chambers for picking up (accommodating) bulk substances and, with rotation of the driving element (16), being moved in sequence past the inlet (6) and the outlet (10).

Abstract: The rotary machine comprises a cylindrical chamber having a rolling piston rotating therein, the piston rolling against the inside surface of the chamber wall. In normal operation, springs keep a vane pressed against the periphery of the rolling piston. A control device for controlling the piston of the vane comprises a control rod lying in the same plane as the vane. The rod includes a retaining abutment formed at the bottom of the control rod and received in a housing formed inside the vane and including a top wall through which the control rod passes, the top wall co-operating with the abutment and the housing having a vertical extent which is not less than the maximum distance between the peripheral surface of the piston and the casing of the rotary machine, thereby enabling the vane to move freely relative to the abutment when the abutment is in its low position.

Abstract: An apparatus harnessing energy belonging to fluid stream comprises a plurality of elongated fluid dynamic force receiving members with cambered cross sections disposed parallel to and about a shaft and supported by at least one hub member affixed to the shaft wherein the individual fluid dynamic force receiving member is secured to the hub member in a pivotable arrangement about a pivot axis disposed near one extremity thereof in a parallel relationship to the shaft, and at least one circular cam guide disposed on a plane perpendicular to the shaft that is engaged by a plurality of cam followers respectively secured to the plurality of elongated fluid dynamic force receiving members.

Abstract: A stuffing-batching machine wherein the bottom of the blades pump chamber for stuffing comprises a detachable discoid plate having a recess in the top to pilot and guide the sliding blades eccentrically with respect to the chamber wall, the plate when assembled resting on an annular seat and locked in a determined angular position with respect to the chamber wall. A set of plates with different plotting of the pilot recess is provided, each plate providing a different degree of compression for the material treated. The propeller of the hopper feeding the product to be treated, is linked by a mechanical device interlocked with an annular part, associated in turn, through a ripid switch assembly, with the hopper lower section, where it remains locked by the arrangement of the propeller and is free once it is disconnected so that it can be pulled out.

Abstract: Supercharger device for reciprocating internal combustion engines, particularly for motor vehicles, comprising, inserted on the induction manifold of the engine, a rotary positive-displacement supercharger driven constantly by the motor shaft, the capacity and therefore the delivery pressure whereof is variable from a minimum value to a maximum value and vice versa by virtue of the corresponding controlled variation of the geometry of the pumping means constituted by a stator cylinder, a rotor and vanes.

Abstract: A fluid pressure-operated device has a rotor mounted inside a main housing, radial slots circumferentially spaced in the rotor, radially sliding vanes in the slots, springs urging the vanes radially inwardly to engage at their inner ends with a cam at the center of the rotor, a control arm pivotally mounted on the housing for changing the position of the cam to control radial displacement of the vanes and opening and closing of a valve having inlet/outlet ports connected to an annular chamber in which the vanes rotate so that fluid pressure from the valve will drive the vanes and thus the rotor in either direction of rotation, depending upon the position of the control arm and cam.

Abstract: A bearing unit for a rotating component, such as a toothed gear or guide pulley, with an integrated pump consists of a housing with a pump chamber defined therein, a pump rotor installed in the pump chamber, a support pin having an end supported in the housing, and a bearing ring rotatably mounted on the support pin. The bearing unit is mountable on a support surface of an associated machine element, such as an engine block by means of a flange on the housing. The pump rotor and the rotating component are securely mounted on the outer surface of the bearing ring in mutual abutting relationship. The pump rotor is disposed between the housing flange and a web portion of the rotating component. The rim portion of the rotating component circumscribes the pump rotor. A sliding sealing ring is provided between the housing or housing ring and the rotating component.

Abstract: In a vane compressor wherein at least two spaces are defined between a pump housing and a rotor disposed within the pump housing, for defining pump working chambers in cooperation with vanes carried in slits in the rotor, each of the vanes has an axial end edge provided with engaging means. Arresting means is disposed for engagement and disengagement with the engaging means of the vanes. When the arresting means is in a position engaging with the engaging means, it arrests each of the vanes in a retracted position in the vane slit in the rotor, while the vane is circumferentially moving in at least one of the pump working chamber-defining spaces from a pump inlet opening in the same space to a pump outlet opening in the same space.

Abstract: 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 guide slits of such rotary vane compressor. The retaining means are actuated to the vane-disengaged position by hydraulic control fluid which is communicated to the retaining means in response to an external parameter sensed by a control means.

Abstract: The communication between at least one of the pump inlets opening in at least two housing cavities and the suction chamber can be interrupted by a first valve means for prohibiting fluid compression in at least one of the housing cavities associated with the at least one pump inlet. At least one of the front and rear side blocks is formed with at least two passage means at locations corresponding to different ones of the cavities for introducing compressed fluid into back pressure chambers formed in the rotor. The communication between at least one of the passage means and the suction chamber can be interrupted by a second valve means.

Abstract: A capacity control circuit for a fluid displacement apparatus, especially for a rotary vane compressor, which circuit controls the volume of fluid displaced or transmitted through such apparatus. The present invention provides a means to retain the vanes within the rotor guide slits with a fluid pressure differential to modulate the volume throughput of such rotary vane compressor or apparatus. This vane control is provided by controlling the suction or input pressure to such apparatus through a fluid control valve.

Abstract: The invention relates to a rotary electrohydraulic device of the volumetrical pump type having stator and rotor as well as vanes axially slidable in said rotor. According to the invention, the intermediary space between the rotor and the stator has an axial longitudinal circulary variable interval partly defined by a continuous stator bottom surface of a constant width, said slidable vanes coming to bear constantly and totally on said continuous bottom surface, which is single for a considered set of said vanes. The device according to the invention is mainly applicable as a brake or slackening means but can also work as a motor and a pump.

Abstract: A variable-displacement vane compressor has a pump housing and a cylindrical rotor supported on a drive shaft and rotatably disposed in the pump housing. The rotor has a plurality of vanes movably fitted in respective slits formed in the rotor and having radially outward ends slidable against an inner peripheral camming surface of the pump housing. Certain ones of the vanes are made of a ferromagnetic material and can be retracted back into the slits in response to energization of an electromagnetic coil to thereby reduce the volume of a fluid discharged from pump working chambers in the pump housing. When the electromagnetic coil is de-energized, all of the vanes are slidably held against the inner peripheral camming surface to discharge the compressed fluid in an increased volume.

Abstract: 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 defined guide slits. The retaining means are actuated to the vane-engaged position by hydraulic control fluid which is communicated to the retaining means in response to an external parameter sensed by a control means.

Abstract: Rotary piston assembly comprising a housing having a bore, a piston rotatably mounted in the housing, a plurality of slide vanes distributed about the circumference of said piston, each slide vane supported for pivotal movement about an axis parallel to the axis of rotation of said piston, said slide vanes operable to pivot and engage the bore of the housing during rotation of the piston due the effect of centrifugal force, each of said slide vanes being of arcuate, vane shaped configuration having an enlarged end section of generally circular cross section, means defining a plurality of axially directed, circumferentially spaced arcuate recesses on the outer peripheral surface of said rotary piston to receive the end sections of said pivoted slide vanes.

Abstract: A rotary vacuum pump is proposed, having a rotor with vanes which rotates eccentrically within a housing bore. Each vane is coupled with a body which is ineffective at relatively low pump rpm; however, at higher rpm, the body engages the vane in such a manner that it removes the vane from its track within the housing bore.In this manner, an rpm-dependent shutoff device is created for the pump. In cooperation with the furnishing of underpressure as an auxiliary pressure in motor vehicles, the pump is used to supplement the underpressure which prevails when the internal combustion engine is at low, idling rpm; this prevailing underpressure is at a very low pressure level, and so when it is thus supplemented there is sufficient auxiliary vacuum force available over the entire rpm range.

Abstract: A rolling piston compressor comprising: a casing of circular cross-section; a rolling piston supported within the casing on a drivable eccentric shaft so as to be freely rotatable thereon and adapted to roll on the internal surface of the casing in the course of rotation of the shaft; at least one separating slide slidably supported in the casing and resiliently urged by the action of a spring against the circumference of the rolling piston, said slide being disposed between an inlet port for drawing in a medium which is to be compressed and an outlet port for the delivery of the compressed medium, and being associated with a device for locking the separating slide in a position in which the free edge does not bear on the rolling piston circumference.

Abstract: A rotary vane type motor, compressor or pump in which an eccentrically mounted rotor having sliding vanes rotates within a stationary main housing or stator. The stator is in turn defined by a pair of opposed shells, each shell essentially being a half cylinder such that the internal working surface of the stator against which the vanes move, forms essentially two opposed and identical circular paths or segments. The movement path of the vanes may be further controlled by rollers affixed thereto and adapted to engage a free idling race ring mounted inside of the hollow rotor and supported by means of a stationary crankshaft. In this added way the vanes pass the internal working surface of the stator without contact at a controlled clearance and the centrifugal force of the vanes acting against the stator housing is eliminated such that increased efficiency and operation at substantially higher speeds is accomplished.

Abstract: Rotary hydraulic device comprising a stator 1, a rotor 2 and closing flanges together forming a tore that can amount to several meters in diameter. The rotor 1 has radial grooves 3 each receiving a valve 4 whose lower face moves on the periphery of the stator which provides swept-volume recesses A, B, C, D limited by a cylindrical part r connected to the periphery of radius R by ramps, the differential valves 4 receiving the thrust of the drive fluid through conduits coming out in the swept volumes.

Abstract: A rotary positive-displacement pump in which the vane or vanes separating the chambers are locked in the inner dead center point after a certain outlet pressure has been attained, in order to shut off the pump. A corresponding locking apparatus has a detent which assures that each vane is locked in a form-locking manner in the position which shuts off the pumping action. Preferably, the locking apparatus has an overstroke step by means of which it is assured that each vane is constantly held at an increased distance from its sliding surface so that friction and impact noises are positively avoided.

Abstract: A rotary sliding vane compressor is provided with magnetic vane retractor means to control the pumping capacity of the compressor without the use of an on/off clutch in the drive system.

Abstract: Method and apparatus for pumping fuel to jet engines and the like utilizing at least two stages, the first of which is a main stage including a centrifugal pump, together with a secondary stage including a positive displacement pump. The two pump stages are driven from a common drive means. In the new system, the positive displacement pump is used as a startup pump and the centrifugal pump is the sole pumping means employed during conditions of higher fuel demand. Speed responsive means are provided in conjunction with the positive displacement pump, which means are responsive to the speed of the centrifugal pump, the speed responsive means being used to terminate pumping action by the positive displacement upon the centrifugal pump reaching a predetermined speed.