Abstract: The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.

Abstract: A metering pump or segment, and a metering pump assembly comprising a plurality of the metering pumps or segments, are disclosed. The drive shaft assembly for driving the pump gears of each metering pump or segment is coaxially aligned with the longitudinal axis of the pump or segment, as is the fluid inlet. The single drive shaft assembly is utilized to drive all of the metering pumps or segments comprising the metering pump assembly, and the different metering pumps or segments are fluidically connected together by means of a common fluid passageway. In addition, the different metering pumps or segments can be interchanged or exchanged so as to permit different metered fluid output volumes to be outputted at different predetermined locations, and the dispensing volumes can also be added together.

Abstract: A cam ring fluid machine, a rotary cam ring fluid machine has a casing, a flange in the casing, a stator in the casing, a rotor cam ring in the stator, a fixed axis in the rotor cam ring, and a vane in the vane groove of the fixed axis. A fluid chamber is formed with the inner circumferential surface of the rotor cam ring, the outer circumferential surface of the fixed axis, the vane, and the flange. When the rotor cam ring rotates, the volume of the fluid chamber increases or decreases.

Abstract: A scroll fluid machine with ensured reliability of an oil seal and a bearing even in a compressor operation at high rpm and high load is provided, which includes: a fixed scroll; an orbiting scroll facing the fixed scroll and having a boss provided on a face opposite to the fixed scroll; a drive shaft having a leading end mounted to the boss; an orbiting bearing supporting the drive shaft in connection with the orbiting scroll; and a seal member placed between the boss and the drive shaft to seal against a lubricant supplied to the orbiting bearing. The seal member has an oil lip producing action of moving the lubricant toward the orbiting bearing by rotation of the drive shaft. A communication passage is provided in the oil lip for communication between a space between the orbiting bearing and the seal member and a space outside the boss.

Abstract: An axial washer of a gear-type pump, in particular an internal gear pump, includes a seal which surrounds a pressure area of the axial washer. The seal is applied to the axial washer as a free-flowing bonding mass that bonds with the axial washer.

Abstract: A device includes a ring having a tubular interior surface centred about an axis. The surface includes a plurality of axially extending, inwardly-projecting ridges. On opposite sides of each ridge is a first port and a second port. A rotor rotates in the ring about the axis. A plurality of vanes is mounted to the rotor body for rotation therewith and for radial extension and retraction relative thereto such that the surface can be swept by the vanes. The rotor and the ring are sealed to permit fluid communication into and out of the device only via the ports. The vanes retract and extend as the body rotates such that chambers are created which decrease in volume when in communication with the first ports and chambers are created which increase in volume when in communication with the second ports. A fluid pressure mechanism can cause vane retraction.

Abstract: The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.

Abstract: A screw compressor includes a casing, a screw rotor and a gate rotor. The casing has a cylinder. The screw rotor is cylindrical-shaped and configured to be fitted into the cylinder. The gate rotor is configured to be engaged with the screw rotor. A, outlet width of a seal surface of the casing on a gas-outlet side of the screw rotor is larger than an inlet width of the seal surface on a gas-inlet side of the screw rotor. The seal surface of the casing is opposed to one surface of the gate rotor.

Abstract: A shaft assembly includes a shaft with a first radial shoulder and a second radial shoulder along a shaft axis. A seal retaining sleeve is defined around the shaft axis to position a shaft seal. A retainer plate at least partially between the first radial shoulder and the second radial shoulder is adjacent to the seal retaining sleeve to position and provide access to the seal retaining sleeve and shaft seal.

Abstract: There is disclosed a sealed type scroll compressor which decreases a sliding loss between a thrust ring and a orbit scroll and improves the efficiency of the sealed type scroll compressor while preventing the leakage of a refrigerant between a fixed scroll and the orbit scroll, and the compressor provides a relation of F1<F2, in which F1 is an operating pressure applied from the front surface space of the thrust ring to the thrust ring, and F2 is an operating pressure applied from a back surface space to the thrust ring.

Abstract: A face of a base of an orbiting scroll member is aligned with a thrust bearing. The thrust bearing includes a back pressure pocket and a seal for sealing the back pressure pocket to entrap a compressed fluid. There is a tap for tapping fluid at a discharge pressure into said back pressure pocket.

Abstract: A vane pump for an automatic transmission includes a housing which may be spaced from the axis of the transmission input shaft axis and driven by a chain or gear train driven by the torque converter hub or disposed on and about the axis of the transmission input shaft and driven at engine speed. The vane pump includes a pair of port plates which reside on the end faces of a pump body having a cylindrical chamber which receives an eccentrically disposed rotor that is coupled to a stub shaft. The rotor includes two halves that define a central chamber. The rotor also includes a plurality of radial slots which receive a like plurality of vanes. The outer ends of the vanes are in contact with the wall of the cylindrical chamber and the inner ends are in contact with a single vane ring received within the central chamber.

Abstract: A compressor may include a shell, first and second scroll members, a partition and a first annular seal. The partition may be fixed to the shell and may overly the first scroll member. The partition may include first and second sides having a second discharge opening passing therethrough and being in communication with the first discharge opening. The first side may include a protrusion extending toward the first scroll member and generally surrounding the second discharge opening. The first annular seal may sealingly engage the partition and may be displaceable radially inward to a position abutting the protrusion to limit a radially inward travel of the first annular seal.

Abstract: In a seal system for a scroll type fluid machine, a seal mechanism is provided between a backpressure plate and a holder, so as to surround an orbiting backpressure chamber. The seal member comprises a seal attachment groove, a seal member and a Y-shaped packing. The seal attachment groove is stepped on its outer circumference to define a shallow bottom portion. The seal member includes, on its outer circumference side, a cutout portion matching the shallow bottom portion. The Y-shaped packing is disposed between a deep groove peripheral wall of the seal attachment groove and the cutout portion of the seal member, and a backpressure chamber is defined on a reverse surface side of the seal member. By this arrangement, a slide surface of the seal member can be larger than an effective area of the backpressure side of the seal member. Thereby it is possible to reduce a difference between a load Ff acting on the slide surface and a load Fb acting on the reverse surface.

Abstract: Gear pumps and methods of using the gear pumps are provided. In general embodiments, the pumps comprise a gear housing defining a passage and having an inlet and an outlet and one or more gears contained within the gear housing. The gears can comprise corresponding bearings that are movably engaged with the gear. The bearings are separated from the passage of the gear housing by one or more seals. The bearings can be contained within a bearing housing attached to the gear housing.

Abstract: A fluid pump (10) or motor (100) includes a pair of enmeshed tapered rotors (22,24,122,124) having intersecting axes of rotation. The first rotor (22,122) includes a small low pressure end (34,54,134,154) and a larger high pressure end (32,52,132,152) and a spiral thread (36,56,136,156) that increases in width and depth as it progresses from the high pressure end (28,128) to the low pressure end (26,126). The second rotor (24,124) enmeshes with the first rotor (22,122), and has an identical structure, except that its threads (36,56,136,156) progress in the opposite direction. Both rotors (22,24,122,124) are mounted on sliding splines (42,62,142,162) which permit them to move, to a limited extent, into and out of their respective receiving cavities.

Abstract: A compressor includes a male rotor (26) having a screw-type boy portion (30) extending from a first end (31) to a second end (32) and held within a housing assembly for rotation about a first rotor axis (500). A female rotor (27, 28) has a screw-type female body portion (33, 34) meshed with the male body portion and extending from a first end (35, 36) to a second end (37, 38) and held within the housing assembly for rotation about a second rotor axis (501, 502). An end seal (120) has a first surface (126) engaging the female body portion first end and being asymmetric around the second axis.

Abstract: An oil rotary vacuum pump of mechanical type is filled with a requested amount of oil at the end of the manufacturing process, then it is stored and then shipped to the user, letting the user to avoid an operation of introducing the proper amount of oil into the pump. The oil leakage is prevented by securing the suction and/or exhaust ports of the pump, which are sealed by means of a removable sealing member, for instance by means of a membrane.

Abstract: In a rotary piston machine with an inner housing and rotors, the axes of the rotors are disposed at an angle to one another in order to equalize manufacturing tolerances and to reduce gap losses of such machines.

Abstract: Within a cam ring (8), a rotor having a plurality of vanes (27) is eccentrically disposed. A metering orifice (136) is provided halfway on a discharge passage (135) of pressure fluid discharged from the pump, and a control valve is activated due to a pressure difference between the upstream and downstream sides of the metering orifice (136). A fluid pressure of the first fluid pressure chamber (21) is controlled by activation of the control valve (123). The second fluid pressure chamber (22) is shut off from the control valve (123) to introduce a pressure on the suction side at any time. To return the cam ring (8) in a direction of expanding a pump chamber (11), an internal pressure of the cam ring (8) is applied in the return direction.

Abstract: A rotary fluid machine is provided that includes a rotor chamber (14), a rotor (41), vanes (48) guided by vane channels formed in the rotor (41), and pistons (47) slidably fitted in cylinders (44) provided in the rotor (41). Rollers (71) provided on support shafts (48d) of the vane (48) are rollably engaged with annular channels (74) of a casing (11) so as to interconvert reciprocation of the pistons (47) and rotational movement of the rotor (41). By capturing water of a hydrostatic bearing, which supports the vane (48) in the vane channel in a floating state, by a U-shaped lubricating water guide channel (43g) formed on the end face of a rotor segment (43) and discharging it into the annular channels (74), the water is prevented from flowing into the rotor chamber (14) and decreasing the temperature of steam, thereby preventing the output of the rotary fluid machine from being degraded.

Abstract: An outer periphery of an output shaft integral with a rotor of an expander of a vane-type operated by a high-pressure vapor is supported at its opposite ends by a static-pressure bearing mounted at one end thereof in a floated state provided by a liquid film of a pressurized liquid-phase fluid supplied from a pressurized liquid-phase fluid feed bore through a pressurized liquid-phase fluid passage, and by a static-pressure bearing mounted at the other end thereof in a floated state provided by a liquid film of a pressurized liquid-phase fluid supplied from a pressurized liquid-phase fluid feed bore through pressurized liquid-phase fluid passages. Vanes supported radially in the rotor for reciprocal movement are supported in floated states by a liquid film of a pressurized liquid-phase fluid supplied through pressurized liquid-phase fluid passages extending radially outwards within the rotor.

Abstract: A piston engine including casing (1, 3, 4, 5) and a parallel-rotating piston (8). The piston is supported on the crank pin (7) of a crankshaft (2) and is secured in rotation relative to said pin (7), piston (8) is fitted with an outer wall that, when viewed in a plane perpendicular to the crankshaft axis, is partly convex (9) and partly concave (10). The outer wall is opposite a casing peripheral wall that, when viewed in the perpendicular plane, is partly concave (11) and partly convex (12). The piston outer wall and casing peripheral wall subtend a chamber (13) that opens, closes and changes its enclosed volume during parallel rotation. The chamber (13) is bounded by axially spaced side walls (14) whereby, one of the side walls (14) is affixed to the piston (8) and overlaps in sliding manner a boundary wall (3′) which is perpendicular to the axis and which is part of the compartment (3) that subtends the peripheral wall (11, 12) and is part of the casing (1, 3, 4, 5).

Abstract: A rotating fluid machine is provided with a rotor chamber, a rotor accommodated in the rotor chamber, and vanes guided by vane grooves formed in the rotor. A U-shaped vane seal is held by a seal holding groove formed in the end face of each of the vanes. The opposite ends of the vane seal are fitted into slits in seal ancillary members which are fitted into engaging holes formed in the end faces of each of the vanes. The seal ancillary members are pressed by springs toward the inner circumferential face of the rotor chamber. The pressure of a gaseous phase working medium introduced into the bottom parts of the seal holding grooves is restrained from leaking out of the ends of the vane seal by the seal ancillary members. Thus, sealing performance can be secured by pressing the vane seal against the inner circumferential face of the rotor chamber.

Abstract: A sanitary pump with gear shaft bearing blocks in opposed cylindrical portions of a pump body bore, blocks constituting hand removable structural pump ends. Gear shaft bearings extending completely through blocks for easy cleaning, sealed by O-rings and clamp plates. Oval gear cavity bore between cylindrical portions of body bore extends only length of largest of interchangeable gears. Seals at end of gear cavity eliminate entrapment zones. Minimal intrusion of bearing blocks into gear cavity allows large operating temperature range. Shaft seals are contained in a hand removable cartridge. Complete pump disassembly by one manually operated clamp. Gear shaft diameters differ assuring correct assembly. Mount receives pump, tie rods sealing pump and securing to mount. Mount allows pump removal without changing pump-drive alignment. Pin and groove engagement of pump to mount allows 90° interval pump ports orientation. Pump displacement is altered with interchangeable gears and drive end bearing blocks.

Abstract: A screw rotor device has a housing with an inlet port and an outlet port, a male rotor, and a female rotor. The male rotor has a pair of helical threads with a phase-offset aspect, and the female rotor has a corresponding pair of helical grooves. The female rotor counter-rotates with respect to the male rotor and each of the helical grooves respectively intermeshes in phase with each of the helical threads. The phase-offset aspect of the helical threads is formed by a pair of teeth bounding a toothless sector. The arc angle of the toothless sector is a least twice the arc angle that subtends either one of the teeth. The helical grooves have a radially narrowing axial width at the periphery of the female rotor.

Abstract: In a rotary pump in which axial end surfaces of outer and inner rotors is in pressurized direct contact with an axial end surface of a second side plate to form a mechanical sealing, both of the axial end surfaces of the outer and inner rotors and the axial end surface of the second side plate are provided with radial line grinding stripes. Teeth gap portions formed by the outer and inner rotors in mesh communicate with an outer circumference gap between the circumference of the outer rotor and inner circumference of a center plate and also with a shaft hole of the inner rotor through extremely slight gaps formed by concave and convex of the radial line grinding stripes so that contact surface between the outer and inner rotors and the second side plate is well lubricated to reduce torque loss.

Abstract: The area of the discharge end of a screw rotor acted on by the discharge pressure is reduced by locating a region of suction pressure acting on the discharge end of the rotor and separating the suction and discharge pressures by a labyrinth seal located between the discharge end of the rotor and the facing housing structure.

Abstract: A sanitary design gear pump in which two gear shaft bearing blocks constitute hand removable structural end bodies of the pump. The gear shaft bearing journals extend completely through the blocks for easy cleaning and are sealed by O-rings retained by simple clamp plates. Gear cavity bore extends only the length of the largest gears, among interchangeable gear sizes. Bearing block to gear cavity seals are located at the ends of the gear bore to eliminate entrapment zones, minimal intrusion of the bearing blocks into the gear cavity allowing a large pump operating temperature range. Shaft seals of many different types can be contained in a simple hand removable cartridge. Complete pump disassembly is by one manually operated tee-handled clamp fastener. The drive and driven gear shafts are of different diameters to aid and assure correct assembly. The assembled pump slides into a pump mount with integral tie rods sealing the pump and securing it to the mount.

Abstract: A gear pump having shafts mounted with rolling element bearings and having mechanical seals on the face of the gears provides improved “clean-in-place” ability. Preferably, washer-like seals are mounted on the face of the gears with a suitable adhesive and the cup-like seals are mounted in end housings. The end housings mate with a central housing enclosing the gears, to provide improved assembly.

Abstract: A metering pump includes a set of externally-toothed gears, with a first of the gears, the drive gear, having a central opening to receive a drive shaft. The gears are supported within a housing defined between first and second housing plates. The first and second housing plates each have central openings aligned with the central opening in the drive gear, and inner wall surfaces adjacent opposite side surfaces of the gears. The first and second gears are rotatably supported within the housing such that the rotational axis of the gears are parallel to one another, and certain of the gear teeth intermesh together when the gears rotate. A first port in the housing provides an inlet fluid flow to an inlet side of the meshing gear teeth, while a second port provides an outlet fluid flow from an outlet side of the meshing teeth. An annular resilient, face-type lip seal is disposed against each side surface of the drive gear, surrounding the central opening in the gear.

Abstract: The present invention relates to a pump, more particularly a radial piston pump, including at least two pump pistons (10) with an associated working chamber (13) each, wherein the working chambers (13) are connected to suction lines (4) by way of suction valve devices (8) and to a joint pressure line (5) by way of pressure valve devices (9), wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in one of the associated lines (4, 5), and wherein at least one of the suction valve devices (8) opens during the pressure stroke in dependence on the pressure in the pressure line (5).

Abstract: An external-rotor-driven lubricating pump comprising a lubricant guidance part including a suction port, an outer wall, a carrier section, a discharge port, a lubricant feed space disposed between the carrier section and the outer wall and connected with the suction port, with a lubricant delivery space disposed between the carrier section and the outer wall and connected with the discharge port, and a pump part including a drive gear, an internally-toothed external rotor, with an externally-toothed internal rotor having one tooth less than the number of teeth on the external rotor, the external rotor and the internal rotor upon meshing pumping the lubricant from the lubricant feed space into the lubricant delivery space, with a shaft supporting the drive gear in the carrier section, the drive gear being fixed to the external rotor, the drive gear forming together with the external rotor the outer closure of the lubricating pump at its pump part end, with the internal rotor being mounted loosely on a collar o

Abstract: The present invention pertains to a dry-running screw compressor, in which the suction-side bearing housing and the pressure-side bearing housing are provided on the inside with journals for engaging holes in the rotors. The two rotors within the compressor housing include only the body of the ribbed rotor and grooved rotor, and the journals of the rotors, which are located on the outside for mounting, are eliminated. The rotors are mounted on the pressure-side journals by means of radial and thrust bearings which are secured by corrugated nuts. Only radial bearings are used on the suction-side journals. The sealing between the tooth spaces of the rotors is ensured by means of sealing disks. To maintain the distance between the rotor faces, gearwheels are inserted on the pressure side between the sealing housing and the bearing housing. The ribbed rotor is driven in this exemplary embodiment with a coupling half for the drive via a torsion shaft.

Abstract: A piston side seal for a multi-lobed piston of a trochoidal rotary engine, consisting of an elongate, resilient metal seal member in the form of a ribbon having first and second opposed side edges wherein in use, the first edge is adapted for lateral location in a seal groove of a multi-lobed trochoidal piston and the second edge will face and provide a seal with a side plate surface of an engine housing when a force is applied to urge said seal member outwardly with respect to the groove, and characterized in that the seal member is provided with at least one longitudinally extending bevelled surface which faces away from the second edge and is adapted such that when the force is applied to the bevelled surface, the force is resolved into a first component to achieve the sealing of the second edge with the side plate surface of an engine housing and a second component which acts to urge the seal member into engagement with one side of the piston groove to provide a gas seal between the seal member and that o

Abstract: A rotary device in which a seal is formed between the rotor and the stator end members by a sealing material having a coefficient of thermal expansion which is greater than that of the material of the end member in which said sealing material is located. When exposed to normal service temperatures, the sealing material bulges out of the parent material to fill in the gap between the end member and the rotor. The sealing material is wearable such that as it expands into engagement with the rotor, it will eventually wear until it no longer contacts the mating surface and a small gap or "minimal clearance" exists.

Abstract: An axial vane rotary device (14) includes a stator (16)with a cylindrical internal chamber (34) defined an annular outer wall (40) and two side walls (36, 38) of the stator. Each side wall has an annular cam surface (42, 44). A rotor (54) is rotatably mounted within the chamber. The rotor has an annular outer wall (66) and a plurality of angularly spaced-apart, axially extending slots (64) extending therethrough. A vane (68) is slidably received in each slot. The vanes reciprocate axially and alternatively expand and compress spaces between adjacent vanes and the cam surfaces as the rotor rotates. The cam surfaces have alternating first portions (92) and second portions (90). The second portions are further from the rotor than the second portions. The first portions of one said cam surface are aligned with second portions of another said cam surface. The slots extend radially outwards on the rotor to the annular outer wall thereof.

Abstract: A rotary engine 1 includes a side housing 2, an intermediate housing 12, a rotor housing 3, a rotor 4 accommodated rotatably in the rotor housing 3; side seal grooves 6 formed on both side surfaces 5 and 25 of the rotor 4; springs 8 for urging side seals 7 fitted respectively in the side seal grooves 6 toward the side housing 2 and the intermediate housing 12, and flexible linear rollers 10 each accommodated between a side wall surface 9 of the side seal groove 6 and the side seal 7.

Abstract: A fluid rotating apparatus includes a casing having a gas inhaling inlet and a gas discharge outlet, rotors driven in the casing by a driving mechanism and having fluid-transporting grooves which engage each other in synchronous rotation, and bearing portion for supporting the rotors. A communicating path is formed at one of the rotors and the and the casing for communicating a gas discharge-side inner space and a space defined by an inner surface of the casing and the fluid-transporting groove of an outer surface of each rotor with each other. The gas discharge-side inner space is defined by an end surface of the rotor opposite to a gas inhaling-side surface thereof, and a sealing portion which is formed between the rotor and the casing to prevent fluid from flowing into the gas discharge-side inner space.

Abstract: An improved rotary, gear within a gear transfer pump, including a pump housing having a circular pumping chamber communicating with a first port and a second port. An externally driven rotor is in meshing relationship with an internal idler gear. To enable the pump to handle an abrasive fluid medium or a non-homogenous pump fluid, an idler gear seal and a shaft seal are employed to contain pumped fluid within the pump chamber. A source of lubricating/flushing fluid is communicated to an idler gear bearing region and a shaft bearing. An idler gear seal includes a "flow resisting" side exposed to pump chamber fluid and a "flow passing" side exposed to lubricating/flushing fluid. The shaft seal includes a "flow resisting" side exposed to pump chamber pressure and a "flow-passing" side exposed to lubricating fluid. A cross-communicating fluid circuit maintains the "flow resisting " sides of both seals at substantially the same pressure.

Abstract: A rotary piston machine (64) of trochoidal construction with a piston (36) of epitrochoidal type with 1:1 generating circles and defined with an outer envelope and a follow-up mechanism (50) for the piston comprising a pair of relatively offset eccenters (52, 54) mounted for eccentric rotation about a drive shaft (14) with the piston, the eccenters (52, 54) being rotatably mounted in respective guide members (58, 60) which are constrained to reciprocate rectilinearly along angularly offset paths, the pair of eccenters (52, 54) being immediately adjacent the piston (36) and secured for rotation directly therewith. Where two or more pistons (36) are provided, each will have a respective follow-up mechanism (50). The piston (36) and follow-up mechanism (50) are mounted on an eccentric portion (30) of the drive shaft (14) which may be stepped with the eccenters (52, 54) being mounted about a reduced diameter portion (32). The eccenters (52, 54) may be separable from the piston (36).

Abstract: A rotary piston internal combustion engine of trochoidal type of construction with a piston slidably journalled and controlled via a synchronous transmission gear drive unit. An eccentric bearing of the piston is sealed-off on both sides of the remaining machine chambers or spaces with sealing rings located around the eccentric shaft. Circulation of the lubricating oil and cooling oil that is under pressure being delimited as to this bearing and the cooling hollow chambers of the piston with such lubricating oil and cooling oil being kept away from the working chambers and also eliminating any oil inner seals otherwise required therewith.

Abstract: Improvements are disclosed in a rotary, lobar, positive-displacement pump and in a rotary, centrifugal pump, whereby all product-contacting areas of the pumps can be effectively cleaned without disassembly, i.e., cleaned in place. Non-rotating seals seal the impellers and isolate the pump shafts from the product zone. Each seal has an elastomeric member molded integrally thereto. The seal is biased by the elastomeric member so as to be slidably pressed against an impeller. In the lobar pump, certain passageways can be selectively closed and opened, so as to adapt the pump for being used to pump a pumpable material when closed and for being cleaned by a cleaning solution flowing therethrough when opened. Valves may be alternatively provided for analogous purposes.

Abstract: A rotary piston internal combustion engine of trochoidal-type of construction with a slidably journalled piston controlled by a synchronous transmission gear drive unit, with which the synchronous transmission gear drive unit is covered coinciding with an insert part threaded with respect to the remaining machine parts adjacent to the eccentric. The insert part has a hollow cylinder covering the hollow gear of the synchronous transmission gear drive unit eccentric to the eccentric shaft, which hollow cylinder is sealed-off with a sealing ring relative to one shoulder of the piston, as well as a further hollow cylinder coaxial to the eccentric shaft surrounding the holding part for the pinion with a gap or space therebetween, which further hollow cylinder projects into a shaft bore in the side part and is sealed-off relative thereto by a sealing ring.

Abstract: A low internal leakage, rotary vane gas compressor utilizing a housing having a generally elliptical cavity, whose outer boundary is defined by an inner stator wall. A shaft mounted rotor is disposed offset from the central axis of the cavity, with an end plate secured on each end of the housing. Each end plate has a centrally mounted hole for rotatably supporting the respective side of the rotor shaft. The housing has inlet and discharge passages, each in conact with the cavity. The rotor has a plurality of radial slots in equally spaced relation about its periphery, in each of which slots a slidable vane of minimal weight is disposed. Each vane is approximately the width of the rotor, and the outer tip of each vane is in close proximity to the inner stator wall. These vanes define a plurality of chambers which undergo significant volume changes during rotation of the rotor.

Abstract: A displacement machine for compressible media, with at least one displacement chamber arranged in a stationary housing and rendered in the manner of a groove extending with a spiral shape, and with a band-shaped or tongue-shaped displacement body associated with each displacement chamber and likewise rendered in spiral shape is described. The displacement body is held on a discoid rotor, which can be driven eccentrically relative to the housing, in such a manner that during operation, each of its outside wall points performs a circular movement bounded by the peripheral walls of the displacement chamber. The curvature of the displacement body relative to the curvature of the displacement chamber is dimensioned such that the displacement body nearly comes in contact with the radially inner and outer peripheral walls of the displacement chamber.

Abstract: A seal assembly for an outer envelope trochoidal rotary device having a rotor that planetates around a housing is provided. The seal arrangement comprises a series of side seals disposed in side walls in the housing, the side seals being interconnected by button seals disposed in the side walls of the housing between side seals. The side seals and button seals are spring biased outwardly against the rotor. Each side seal includes a pair of identical oppositely disposed seal strips having an elongated body member and a triangular portion. The elongated body member includes a triangularly shaped relieved portion that has a shape corresponding to a side of the triangular portion. The seal strips are interconnected between two button seals so that the triangular portion of a first seal strip abuts a first button seal and the triangular portion of a second seal strip abuts a second button seal. The button seal includes a relieved area.

Abstract: A rotary engine includes a housing having a cylindrical internal surface on which seals are supported to prevent the flow of gases from spaces between two rotating pistons on separate but concentrically-arranged shafts. Three sets of gearing control relative rotation of the pistons which move toward and away from each other to compress gases between the pistons. A drive shaft is connected by the first gear set to a first of the concentrically-arranged shafts. The drive shaft is also connected by a second gear set to the other of the concentrically-arranged shafts. The third gear set, comprised of non-circular gears, connects the drive shaft to an output shaft.

Abstract: A Roots-type rotary fluid machine having resin-coated rotors fluid-tightly accomodated in a chamber formed in a housing structure which consists of a generally cup-shaped main housing body having a bore closed at its one end and open the other end, and a covering member which closes the open end of the bore in the housing body. The housing body includes a fillet portion which bridges an inner flat surface defining the bottom of the bore and facing one end face of each rotor, and an inner peripheral surface defining the periphery of the bore and facing the outer peripheral surface of each rotor. The fillet portion is formed along a line of intersection of extensions of the inner flat surface and the inner peripheral surface of the housing body, and inwardly into the bore from this line of intersection. The fillet portion has a generally triangular shape in cross section taken in a direction perpendicular to the above line of intersection.

Abstract: A rotary engine includes a housing having a cylindrical internal surface on which seals are supported to prevent the flow of gases from spaces between two rotating pistons on separate but concentrically-arranged shafts. Three sets of gearing control relative rotation of the pistons which move toward and away from each other to compress gases between the pistons. A drive shaft is connected by the first gear set to a first of the concentrically-arranged shafts. The drive shaft is also connected by a second gear set to the other of the concentrically-arranged shafts. The third gear set, comprised of non-circular gears, connects the drive shaft to an output shaft.