Abstract: A rotary engine includes a housing body having a first rotation chamber and a second rotation chamber. A first rotary body is arranged within the first rotation chamber, and a second rotary body is arranged within the second rotation chamber. A boundary surface of the first rotation chamber has a variable distance from an opposite surface of the first rotary body. A pair of valve flaps having a first valve flap and a second valve flap is arranged on the first rotary body. Upon rotation of the first rotary body, the valve flaps are in engagement with the boundary surface of the first rotation chamber and are rotated in mutually opposite directions with regard to the first rotary body so as to form two mutually demarcated working chambers within the first rotation chamber.

Abstract: An alloy suitable for use in a rotor, such as one or more regions of a steam turbine rotor, as well as a forged rotor formed with the alloy. The alloy consists of, by weight, 0.20 to 0.30% carbon, 0.80 to 1.5% chromium, 0.80 to 1.5% molybdenum, 0.50 to 0.90% vanadium, 0.30 to 0.80% nickel, 0.05 to 0.15% titanium, 0.20 to 1.0% manganese, and 0.005 to 0.012% boron, the balance iron, optionally low levels of other alloying constituents, and incidental impurities.

Abstract: Disclosed herein is a compression unit of an orbiting vane compressor. The compression unit comprises a circular operation space formed in a cylinder, the circular operation space having opposite ends, a circular vane disposed in the operation space for performing an orbiting movement, the circular vane having opposite ends, a linear slider disposed in the operation space for performing a linear reciprocating movement while one end of the linear slider is in contact with the end of the circular vane, and a pressurizing member disposed in the operation space adjacent to the other end of the linear slider for applying pressure to the linear slider such that the linear slider is brought into tight contact with the circular vane. Consequently, interference between the inner wall of the cylinder and the circular vane is prevented, and creation of dead volume in the operation space is prevented.

Abstract: A compressor comprising a hermetic casing, a cylinder assembly disposed in the casing, a Z-plate disposed in the cylinder assembly for dividing an inner space of the cylinder assembly into a plurality of compression spaces, and sucking, compressing and discharging a fluid while being rotated by a driving unit, and vanes being contacted with both sides of the Z-plate to make a reciprocal movement, wherein the cylinder assembly includes a vane slot for inserting the vane, said vane slot having an opened portion opened towards an outer circumference of the cylinder assembly, thereby facilitating a processing of the vane slot, enhancing productivity of the cylinder assembly and reducing a production cost.

Abstract: An internal geared wheel pump that does not have a crescent shaped piece. The pump has an internal geared wheel that meshes with a pinion. The pinion and geared wheel are mounted in a rotatable manner in a housing that has a suction connection and a pressure connection. The geared wheel has passages that produce each time a conductive connection between the base of the tooth and the envelope surface of the geared wheel. Conductive connections are produced between the bearing flanks of the teeth of the geared wheel or the teeth of the pinion and the radial boreholes of the geared wheel.

Abstract: A crescentless internal gear pump includes a housing with an intake connection and a pressure connection. An internally toothed internal gear has an outside surface and is disposed for rotation within the housing. Each tooth includes a head and a base, the internal gear having radial openings that form a conducting connection between a tooth base and the outside surface. A pinion, which is rotatably disposed within the housing and meshing with the internal gear, has teeth with each tooth including a head. The teeth of one of the internal gear and pinion, includes a profile groove with a base provided in the heads into which a sealing element is disposed and which slides on an opposing tooth head. The sealing element has a sealing surface and includes a channel that produces a conducting connection between the profile groove base and the sealing surface. The sealing element is slightly movable in the profile groove in the radial direction to form a controlled gap.

Abstract: A drilling motor has been developed with a hollow tubular stator having at least one rod recess therein and an inlet port therethrough corresponding to each of the at least one rod recess; a rod movably disposed in each of the at least one rod recess; a tubular rotor movably disposed within the stator for rotation therein, the tubular rotor having a central motive fluid flow channel therethrough and extending along the length of the rotor, the rotor having one or more radial exhaust flow channels therethrough for providing a motive fluid flow path to the central motive fluid flow channel from at least one action chamber between the hollow tubular stator and tubular rotor; the tubular rotor having at least one rotor seal; and the at least one action chamber defined by an interior surface of the hollow tubular stator and an exterior surface of the tubular rotor, each of the at least one action chamber sealed at one end by the rod and at another end by one of the at least one rotor seals.

Abstract: A rotary device containing a housing with a curved inner surface in the shape of a trochoid and an interior wall, an eccentric mounted on a shaft disposed within the housing, a rotor mounted on the eccentric shaft and several pins attached to the rotor and extending from the rotor to the interior wall of the housing. A continuously arcuate track is disposed within the interior wall of the housing, and the pins are disposed within the track.

Abstract: The invention is directed to a sickleless internal gear pump with an internal ring gear and a pinion meshing with the ring gear. The ring gear has radial apertures for the medium being pumped, and sealing elements radially movably disposed in an appropriate profile groove, and inserted in respective tooth heads of the ring gear, or in the tooth heads of the pinion. The sealing elements are able to slide on the opposite tooth heads of the pinion, or of the ring gear. The head shape of the sealing element and the shape of the tooth space bottom of the ring gear, or of the pinion, are configured such that the sealing element establishes a seal between the pressure space and the suction space in the area of dead center.

Abstract: A drilling motor has been developed with a hollow tubular stator having at least one rod recess therein and an exhaust port therethrough corresponding to each of the at least one rod recess; a rod movably disposed in each of the at least one rod recess; a tubular rotor movably disposed within the stator for rotation therein, the tubular rotor having a central motive fluid flow channel therethrough and extending along the length of the rotor, the rotor having one or more radial flow channels therethrough for providing a motive fluid flow path from the central motive fluid flow channel to at least one action chamber between the hollow tubular stator and tubular rotor; the tubular rotor having at least one rotor seal; and the at least one action chamber defined by an interior surface of the hollow tubular stator and an exterior surface of the tubular rotor, each of the at least one action chamber sealed at one end by the rod and at another end by one of the at least one rotor seals.

Abstract: The invention relates to a sickleless internal gear pump with an internally toothed ring gear and a pinion meshing with the ring gear. The pinion and ring gear are rotatably mounted in a housing having a suction port and a pressure port. The ring gear includes radial ports for the medium to be pumped. The tooth heads of the ring gear or the tooth heads of the pinion have a profile groove into which a plurality of sealing elements are respectively inserted. The sealing elements are able to slide on the radially opposite tooth of the pinion or ring gear. The invention is characterized by a profile groove, viewed in axially perpendicular section, which has no ports. The individual sealing elements are provided with a channel establishing a fluid connection between the interior of the profile groove and the sealing face of the sealing element. The channel, viewed in the direction of rotation of the pinion, is enveloped by the material of the sealing element.

Abstract: A crescent-less internal gear pump. The internally geared wheel has a plurality of radial openings from its peripheral surface into the tooth gaps at the tooth base. The axial width of the pinion and/or the internally geared wheel is at least as great as the diameter of the rolling circle of the pinion. The filling of the inside of the pump through radial openings makes it possible to make the internally geared wheel as axially wide as the suction connection or as that part of the housing which receives the active gear parts participating in the formation of the delivery stream. It is possible to develop the axial width of the toothing considerably larger than the diameter of the rolling circle of the pinion. Complete filling of the tooth gaps with pressure fluid is assured without the occurrence of flow velocities at which the formation of noise or other disadvantages is to be expected. The pump can also be provided with two internally geared wheels arranged alongside each other.

Abstract: A rotary compressor for compressing fluid. A housing having a cylindrical internal cavity is provided with vanes and delivery ports. A rotor is rotatably mounted in the housing. The rotor has a portion for making a sealing contact with the inner peripheral surface of the housing. The rotor has a suction chamber formed therein. The number of the vanes is greater by 1 (one) than the number of the sealing contacts between the rotor and the inner peripheral surface of the housing. At least one suction port is formed through the wall of the rotor, so that the fluid in the suction chamber may be sucked into the working chamber defined by the vanes, rotor and the housing. The suction port is so located that, when a working chamber has been expanded to its maximum volume, the suction port is positioned between the vane located at the leading side of the working chamber as viewed in the direction or rotation of the rotor and the sealing portion closer to the vane.

Abstract: A seal mechanism for the periphery of the rotor of a rotary piston engine including a sealing ledge supported on the rotor to be pivotable about an axis extending in the longitudinal directional thereof and operative to make sealing contact with an opposed surface of said rotary piston engine over a limited region of the periphery of the sealing ledge facing toward said opposed surface. Through at least one secondary member extending parallel to the sealing ledge at a point of its periphery between the sealing ledge and the rotor, a surface region is defined on the sealing ledge at which forces are developed by the fluid working medium of the engine to effect a desired sealing engagement between the sealing ledge and the opposed surface of the engine.

Abstract: A sealing structure for a rotary valve including a rotary member having a plurality of pockets opening toward the outer periphery of a rotary member. A casing encloses the outer periphery of the rotary member. Sealing members are provided between the outer periphery of the rotary member and the inner periphery of the casing. The sealing members are adjustably projectable in the radial direction.

Abstract: Corner seal for rotary piston engines comprising a substantially cylindrical body which is formed with a groove for accommodating an end of the apex seal. The corner seal has an end surface adapted to be brought into a slidable engagement with the inner surface of a side housing. The end surface of the corner seal is formed with a recess so that the area of the sliding surface is decreased to 45 to 75% of a sum of the area of the sliding surface and the area of the recess.

Abstract: The improved rotor is for a rotary compressor or expansion engine of the type having a rotor supported for planetation in a multi-lobe housing cavity and comprises an endless band embracing the peripheral surface of the rotor, which band functions to continuously engage at the apex portions of the rotor, the peripheral surface of the housing cavity and thereby seal the working chambers from each other as the rotor rotates within the cavity.

Abstract: An improved apex seal for a rotary engine of the type having a housing with an interior wall and a rotor having plural apices within the housing. A plurality of apex seals are provided, one at each of the apices on the rotor, for establishing a seal between the rotor and the interior wall of the housing. Each of the seals is thin walled and hollow and further includes a fluid inlet and a fluid outlet. Conduits are provided in the rotor for directing a coolant through each of the seals via the inlets and the outlets so as to control seal temperature and thereby minimize seal wear.

Abstract: An improved rotary mechanism such as a rotary engine. The mechanism includes a main shaft with a rotor supporting portion thereon. A rotor is journalled on the supporting portion and has a plurality of apices. Each apex is provided with a seal retaining groove and a seal is disposed therein. A plurality of hydraulic passages are provided in the rotor, one for each apex seal, and open from the rotor to the rotor supporting portion of the main shaft. The rotor is provided with suitable devices for transmitting hydraulic pressure applied in each of the passages to the corresponding apex seal to bias the apex seal out of the groove into good sealing engagement with the operating chamber walls. A hydraulic fluid conduit is located in the main shaft and has a port terminating in the rotor supporting portion. The port is disposed to be periodically, serially aligned with the passages in the rotor for timed biasing of the apex seals as desired.

Abstract: An improved rotary mechanism having a housing defining an operating chamber, a shaft journalled in the housing and extending through the chamber, a rotor journalled on the shaft and within the operating chamber, at least one seal receiving groove in the rotor and a seal within the groove having a surface sealingly engaging the housing. An elastomeric O-ring is disposed within the groove and sealingly engages the sides of the groove. It is also disposed adjacent the seal oppositely from the sealing surface. A conduit is provided for directing fluid under pressure to the interior of the O-ring to cause the same to bias the seal against the housing.

Abstract: A rotary engine of the trochoidal type in which the rotor and the profile of a basically trochoidally shaped inner housing wall bear such relationship to one another that when the differential in pressure in the flanking chambers is Greatest, the rotor apex seals are deliberately caused to stroke out, so that the resulting friction between the outwardly stroking apex seals and the sides of the rotor slots, so modifies the outward forces acting on the seals that the contact force between the seals and the housing wall are significantly less than they would be without such outward stroking of the apex seals.