Abstract: The present invention relates to an apparatus for pumping or compressing a fluid, the apparatus characterised by a compression chamber including an inlet and outlet, opposed front and rear vane members disposed inside said compression chamber, each vane member including at least one axially extending vane segment and at least one radially disposed open segment adapted to receive a vane segment of the opposed vane member, wherein adjacent vane segments of mating vane members form radial compartments there between. The assembly further includes a swing arm assembly for effecting equal and opposite rotational oscillation of the front and rear vane members such that adjacent vane segments oscillate toward and away from one another simultaneously, thereby creating a bellowing effect which draws fluid into the chamber via the inlet and discharges fluid out of the chamber via the outlet.

Abstract: Disclosed herein is an oscillating vane type pump actuator. The pump actuator of the present invention provides a method of preventing fretting corrosion from being caused on joined surfaces of elements. A cylinder (3c) has a comparatively low radial strength, and each of side covers (1c) and (2c) has a high radial strength. A cylindrical portion (1c-c), (2c-c) is provided on each side cover. Thus, when high pressure of work oil distorts the cylinder into a shape in which the cross-section of the cylinder becomes an ellipse-like shape, the cylindrical portions of the side covers act such that they are distorted in the same shape as that of the cylinder. Further, a passage that always communicates with a low-pressure side working chamber is formed in the contact surfaces between a fixed vane that is fixed to the cylinder and the side covers.

Abstract: A rotary engine is described including: (1) a rotor eccentrically located within a housing, the rotor configured with a plurality of rotor vane slots; (2) a first vane of a set of vanes separating an interior space between the rotor and the housing into at least a trailing chamber and a leading chamber, where the first vane slidingly engages a rotor vane slot; (3) a first conduit within the rotor configured to communicate a first flow between the trailing chamber and the rotor vane slot; and (4) a second conduit within the rotor configured to communicate a second flow between the trailing chamber and the first conduit. Optionally, a vane seal is affixed to the first vane or the rotor, where the vane seal is configured to valve the first conduit or a vane conduit, respectively.

Abstract: A rotary apparatus is described having: a vane; a rotor comprising a center, the rotor configured to carry the vane; and a housing, the rotor operatively mounted within the housing. The vane includes: a central vane axis extending longitudinally through the vane along a y-axis, the y-axis comprising a line from the center of the rotor to the housing, and a vane end intersecting the y-axis, the vane end proximate an inner surface of said housing. The vane end of the vane further includes a vane extension protruded radially outward from about the vane end along an x-axis about perpendicular to the y-axis, the vane extension comprising at least one aperture therethrough. During operation of the rotary apparatus, fuel flows through the aperture reducing pressure between a portion of the vane extension and the housing, which facilitates vane sealing to the housing and improves efficiency by reducing engine chatter.

Abstract: A vacuum pump has inside the pumping chamber valves intended to control the operation by opening and closing during the suction and delivery cycle of the pump. The valves or parts connected thereto are formed at least in part by a ferromagnetic material. A magnetic inductor is applied outside a wall, formed by a non ferromagnetic material, of the pumping chamber of the pump, and inside the pumping chamber are installed conducting elements of ferromagnetic material, for conducting magnetic flow produced, by the inductor, up to polar points close to the positions taken in the conditions of inactivity by the valves, so as to magnetically attract the valves (10,20) in an inactivity position when the inductor is operated, and thus stop the pneumatic operation of the pump without stopping its motion which then becomes idle.

Abstract: A rotary pump includes a stator having a chamber delimited by a circumferential wall, a cylindrical rotor tangent to the circumferential wall of the chamber and suitable for being driven in rotation around an axis eccentric with respect to the chamber, and at least a vane diametrically traversing the rotor by delimiting in the rotor two half shells, mutually separated by the walls guiding the vane. The two half shells are hollow, and inside these hollow half shells are housed elastic leaf springs forming one-way valves with respect to four passageways formed in the half shells; the discharge of the air-oil mixture takes place, after a centrifugation and a partial recycling, through passageways, also in the case of a counter rotation of the pump. This configuration allows a bidirectional use of the same rotor.

Abstract: A rotary engine configured to use compressed air or high pressure steam to produce power. It has a casing with two peripheral exhaust ports each adjacent to a flattened area, a rotor having three slotted pistons, and a center valve with two opposed inlet ports that provide high pressure steam or compressed air to the pistons. Each rotor revolution produces three power strokes. Furthermore, the volume of air used for a single cycle is reduced, as a result of the air traveling through its pistons. Also, the engine stops when the vehicle it powers is at rest, and a spring inside each piston causes its angled tip to contact the rotary chamber upon start up. In addition, it is inexpensive to manufacture, as there is not much tooling needed to make the rotary engine, and it has only four moving parts, its rotor and the three pistons attached to it.

Abstract: A check valve of a scroll compressor which has a driving unit inserted in a casing and generating a driving force and a compression unit consisting of an orbiting scroll and fixed scroll for compressing and discharging fluid when the driving unit is driven, includes: a valve guide having one side fixed at an upper surface of the fixed scroll and having a certain space at an upper side of a discharge passage of the fixed scroll through which fluid is discharged, and a valve member with one side fixed at the upper surface of the fixed scroll, being slidably disposed in an horizontal direction at an inner surface of the valve guide, and performing an opening and closing operation on the discharge passage (34) by being slid in a horizontal direction of the valve guide.

Abstract: A rotary machine (10) comprises an inner housing (12) having valving means (14) which includes a shaft (15) for directing working fluid through the machine (10) and, an outer housing (16) within which the inner housing resides. A working chamber (18) is defined between the inner and outer housings (12 and 16). A plurality of gates (20) are supported by the inner housing and are swingable along their respective longitudinal axis between a sealing position in which the gates form a seal against surface (22) of outer housing (16) and a retracted position in which the gates (20) lie substantially against surface (24) of the housing (12).

Abstract: A rotary engine consisting of a slightly oblong casing (10) housing a circular shaped rotor (12). Attached to the rotor are separating vanes (14) that slide in and out of the rotor to create separate chambers within the engine. Additionally, the rotor houses inlet valves (16) and exhaust valves (18) which draw in and expel the fuel/air mixture, respectively. The rotor houses the means for manipulating the valves.

Abstract: A compressor with a hypotrochoidal design is constructed in such fashion that its delivery can be varied in ways other than by the drive rpm alone. A controlling edge of an inlet opening that determines the beginning of compression has a variable angular position for this purpose.

Abstract: A rotary piston engine is shown which includes a housing (22) having a cylindrical working chamber with inlet (88) and exhaust (86) ports. First and second piston assemblies (30 and 32) each of which includes at least one pair of diametrically wedge-shaped pistons (30A and 30B, and 32A and 32B) are located in the working chamber. The piston assemblies rotate in the same direction at recurrently variable speeds so that one pair of diametrically opposite sub-chambers decreases in volume while the other pair increases in volume. In FIG. 1, four eccentric elliptical gear sets (60, 62, 64 and 66) interconnect coaxial piston shafts (38 and 36B). Compound eccentric elliptical gear sets (106 and 108) for interconnection of the piston shafts are shown in FIG. 7. Gear trains of large effective eccentricity are employed such that during the power phase of engine operation the trailing piston rotates only a small amount for efficient engine operation.

Abstract: A rotary engine includes separate compressor and combustion sections which are interconnected. Each section includes a cylinder formed with a cylindrical working chamber containing a pair of pistons rotatable about the cylinder axis. The pistons are attached by cylindrical hubs to coaxial shafts extending from an end of the cylinders, which shafts are interconnected by generally elliptical gear means to provide for rotation of the pistons at periodically variable speeds such that sub-chambers of periodically variable volume are provided. The outer free edges of the pistons and attached hubs are recessed, and seal means are located in the recesses to prevent gas leakage between opposite sub-chambers. The combustion section cylinder is provided with intake and exhaust ports in the cylinder wall and, for spark ignition, with a spark plug. For compression ignition, fuel injector means are provided in place of the spark plug.

Abstract: A scroll-type positive displacement apparatus which can be used as a vacuum pump is disclosed. A pair of interfitting scrolls are housed in a first container which communicates with a vacuum chamber to be evacuated by the pump. The scrolls are rotated in synchrony about parallel, nonaligned axis by a drive motor. The scrolls define a plurality of spiral compression chambers which change in size when the scrolls are rotated, compressing a gas contained in the compression chambers. The shaft of one of the scrolls has a discharge port formed therein which communicates between the centermost compression chamber and the inside of a second container which adjoins the first container. The second container is partially filled with lubricating oil and communicates with the atmosphere. The discharge port is equipped with a check valve which permits compressed gas to enter the second container from the scrolls but prevents gas from flowing in the opposite direction.

Abstract: A scroll type positive displacement apparatus which can be used as a vacuum pump is disclosed. A pair of interfitting scrolls are housed in a first container which communicates with a vacuum chamber to be evacuated by the pump. The scrolls are rotated in synchrony about parallel, nonaligned axes by a drive motor. The scrolls define a plurality of spiral compression chambers which change in size when the scrolls are rotated, compressing a gas contained in the compression chambers. The shaft of one of the scrolls has a discharge port formed therein which communicates between the centermost compression chamber and the inside of a second container which adjoins the first container. The second container is partially filled with lubricating oil and communicates with the atmosphere. The discharge port is equipped with a check valve which permits compressed gas to enter the second container from the scrolls but prevents gas from flowing in the opposite direction.

Abstract: A rotary vane pump comprising an inner rotor and an outer rotor which rotate together about eccentric axes. A pair of support shafts is attached to the inner rotor and are rotatably mounted for rotation of the inner rotor. At least one of the support shafts is hollow and serves as a fluid conduit. The outer rotor and the inner rotor are provided with ports at the ends thereof for flow of fluid into the inner rotor. The relative dimensions of the rotors are such that a chamber is formed between the rotors. A vane is attached to the outer rotor and slidably extends into a slot in the inner rotor. The vane divides the chamber into intake and outlet portions. Fluid flows from the inner rotor into the chamber between the rotors, and fluid flows from the chamber into a fluid conduit formed by the hollow support shaft. The rotary vane pump is adapted to pump fluids, such as gases and liquids, separately or in combination.

Abstract: An apparatus, particularly for compressing and conveying fluids, comprising a rotor (1) and a thin-walled rotary sleeve (7) which is rotatably arranged eccentrically with respect to the axis (M1) of the rotor and which is in surface contact with the surface of the rotor throughout a predetermined angular range (.phi.). At least one separator slide (12) is provided between working chambers (S, D) the volumes of which vary when the rotary sleeve rotates. The apparatus is constructed such that the fluid throughput and the speed of rotation can be increased compared to conventional devices, so that a device of given capacity may have smaller dimensions and a lower weight.

Abstract: A rotary vane pump comprising an inner rotor and an outer rotor which rotate together about eccentric axes. A pair of support shafts are attached to the inner rotor and are rotatably mounted for rotation of the inner rotor. At least one of the support shafts is hollow and serves as a fluid conduit. The outer rotor is rotatably mounted upon the support shafts. The outer rotor and the inner rotor are provided with ports at the ends thereof for flow of fluid into the inner rotor. The relative dimensions of the rotors is such that a chamber is formed between the rotors. A vane is attached to the outer rotor and slidably extends into a slot in the inner rotor. The vane divides the chamber into intake and outlet portions. Fluid flows from the inner rotor into the chamber between the rotors, and fluid flows from the chamber into fluid conduit formed by the hollow support shaft.

Abstract: A vane compressor comprising a rotor eccentrically arranged in a cylindrical housing and vanes, which define a space between the periphery of the rotor and the inner surface of the housing. The volume of the space varies during the rotation of the rotor due to the eccentricity of the rotor. The rotor (14) comprises inlet valves (19, 23) arranged between the inlet (12) of the compressor and the space (46) in order to open when the pressure in the space (46) is below the pressure at the inlet (12) in order to suck in air inside the space (46) during the intake stroke of the rotor. Moreover, the rotor comprises outlet valves (20, 24) arranged between the space and the outlet (48) of the compressor and adapted to open when the pressure in the space (46) exceeds the counter-pressure at the outlet (48) during the compression stroke.

Abstract: A rotary vane pump comprising an inner rotor and an outer rotor which rotate about eccentric axes. A pair of hollow support shafts rotatably support the inner rotor and serve as passages for flow of fluid to and from the inner rotor. Passages within the inner rotor are in fluid communication with the passages which extend through the support shafts. The relative dimensions of the inner rotor and outer rotor are such that a chamber is formed between the inner rotor and outer rotor. A vane is attached to the outer rotor and slidably extends into a slot in the inner rotor. The vane divides the chamber into intake and outlet portions. A check-valve is positioned to control flow of fluid in the outlet portion of the inner rotor.

Abstract: The invention relates to a hydrostatic steering control unit of the type having a metering motor for supplying metered pressurized fluid to external servomotor. The unit has a throttled controlled passage which bypasses the metering motor and has a flow therethrough which has a definite relationship to the flow through the metering motor. In this way a comparatively large amount of pressure fluid can be supplied to the servomotor even though the flow capacity of the metering motor is much smaller.

Abstract: A rotary compressor is provided with a rotary valve arranged rotatably in the housing unit. The rotary valve is partially exposed to an interior space of the housing unit. The interior space is divided into a plurality of variable working spaces. A return port is formed in the rotary valve for feeding a cooling medium into an inlet port from the working space. A quantity of the cooling medium discharged from the working space through an outlet port is changed in accordance with the rotation of the rotary valve controlled by the actuator.

Abstract: A compressor, particularly such suited for use in motor vehicles, especially passenger cars, for instance, in the air conditioning systems thereof, includes a stator including a housing bounding an internal space accommodating a rotatable body of a rotor. An internal surface of the housing and an external surface of the rotatable body together form at least one compression space of a varying radial dimension as considered in the circumferential direction. The rotary body is provided with a plurality of recesses each of which partially receives a respective vane for reciprocation in contact with the internal surface of the housing, such that the vanes subdivide the compression space into a plurality of compartments. The medium to be compressed is sequentially admitted into the respective compartments through respective inlet openings provided in the stator. The compressed medium is discharged from the respective compartments through a passage provided in the interior of the rotary body.

Abstract: A sliding vane compressor for use in refrigeration systems includes a rotatable hollow shaft, a cylindrical compressor rotor which surrounds the shaft, end covers enclosing the compressor rotor and a pair of vanes disposed within the rotor to compress a working medium entering the rotor. The compressor rotor and end covers have end faces in a contact area therebetween. At at least one of end faces of either rotor or end cover, a number of spirally-shaped grooves are formed curved in the direction of rotation of the rotor shaft. These grooves extend from the periphery of the respective end face toward the center thereof but short of said center to produce a flow preventing leakage of the working medium between the low pressure region and the high pressure region in the compressor.

Abstract: A variable displacement balanced vane pump includes an alternate flow passage for fluid being compressed in an intervane chamber whereby the excess portion of the fluid is by-passed from the pump discharge zone to the pump inlet zone without appreciably increasing the pressure of the excess fluid portion to minimize the required pump input energy.

Abstract: A rotary compressor includes housing means in which an impeller is rotatably mounted.

Abstract: A rotary pump which comprises a cylinder having two walls which cover both ends thereof to form a compressing chamber, each of the walls includes a bearing at its center and holes around the bearing to form an inlet or an outlet of the fluid, a shaft supported by the bearings and driven by a motor, a piston having two connected arc surfaces rotatably mounted within the cylinder, each surface of the piston including a groove, an outlet port and an inlet port, a separating plate mounted in the hole of the piston and dividing the hole into two parts and separating the outlet ports and inlet ports on each part, a plunger which may be moved back and forth in the piston hole to open or close the inlet ports. The present invention can pump the fluid in periodic high pressure or stable middle pressure by controlling the movement of the plunger in piston.

Abstract: A positive displacement engine utilizing interlocking vaned rotors and providing for the virtually complete exclusion of spent vapors following the expansion cycle.

Abstract: The specification discloses a rotary machine, providing internal compression or expansion, connectable to a driving or driven shaft and comprising a cylinder rotatable about its axis, a piston within the cylinder rotatable, synchronously with the cylinder, about an axis parallel to but offset from the axis of rotation of the cylinder, cylinder end boundaries contiguous with either the cylinder or the piston, and a series of flexible vanes each of which is insealable rubbing contact with the end boundaries and is sealably connected to the circumferential surfaces of the cylinder and piston, whereby rotation of the cylinder or piston is transmitted by the pull of the vanes to the piston or cylinder, the volume between each adjacent pair of vanes alternately increasing and decreasing during induction and exhaust of the said volume.

Abstract: A rotary piston, internal combustion engine of the trochoid type is disclosed. The piston is arranged to rotate planetary fashion within a surrounding housing and has inlet and outlet channels therein for the inflow and outflow, respectively, of the working medium. According to the invention, a spring-loaded check flap is provided in each of the inlet channels to improve the charge alternation of the engine.