Abstract: A throttle portion is formed in an intake port in a stationary scroll member to suppress an abnormal pressure rise which may take place when a refrigerant is sucked in the intake port, and a communication hole for communicating a low pressure space in a shell with a space inside an oldham's coupling, the inner space being formed by a recess of a bearing frame, the outer peripheral wall of the base plate of an oscillatable scroll member and the side surface of the wrap of the stationary scroll member.

Abstract: A scroll compressor including a stationary scroll and an orbiting scroll, with an intermediate pressure chamber being defined on a back side of the orbiting scroll member and being in communication with a pressure chamber through a communication hole to produce a force for pressing the orbiting scroll against the stationary scroll. Oil in an oil sink is supplied to sliding portions by a differential pressure between a pressure in the air tight container and a pressure in the intermediate pressure chamber. A valve is provided for switching the connection of the intermediate pressure chamber to a higher intermediate pressure side or to a lower intermediate pressure side of the compressor.

Abstract: An oil distribution system for supplying lubricating oil to a thrust bearing, the bearing surfaces of an Oldham coupling, and a swing link bearing in a scroll compressor and allocating the oil between the bearings in proper proportion. Oil is pumped from a reservoir in the bottom of the compressor shell upward through a gallery that runs the length of a rotating drive shaft. The oil exits an opening at the top of the drive shaft and is thrown radially outward into a shallow cavity formed in a swing link that is rotatably driven by the shaft. The cavity is generally elongate in shape, so that oil collects in pools at each of its ends as a result of centrifugal force. Each of the two bearings is lubricated by oil that flows upward into the bearings either directly or through a passage from the pools of oil.

Abstract: The discharge gas which has been compressed by the compressor main body is cooled by heat dissipation through the heat exchanger, after which it is again returned to the compressor. When the lubricant oil is sucked under pressure of the discharge gas, it is also cooled. Each and every component part of the compressor main body and the electric motor is cooled by causing the cooled discharge gas to pass there through, whereby the temperature rise in the compressor as a whole can be suppressed.

Abstract: A scroll type fluid apparatus having a rotation preventing mechanism provided with a sliding member engageable with the outer surface of a bearing portion at an orbiting scroll and regulating the radial movement of the sliding member in reciprocating movement, and a sliding member holder engageable with the outer surface of the sliding member so as to regulate the movement of the sliding member in the direction perpendicular to the moving direction of the bearing portion. Spaces formed before and behind the sliding member in the sliding direction thereof are utilized as oil chambers respectively, whereby lubricating oil pumped-up from an oil pickup provided at a crankshaft is forcibly fed by the pump action caused by sliding motion of the sliding member onto the slidable contact surface of a thrust bearing supporting the orbiting scroll.

Abstract: A rotary hermetic compressor including a compressor cylinder having a bore therein, and a sliding vane slidably disposed in a slot in the compressor wall. The vane extends into the bore of the cylinder for cooperating with a roller to divide the compression chamber into a suction chamber and a discharge chamber. A pressure groove is formed in the wall of the slot on the suction side of the vane. The pressure groove is supplied with oil by means of a passage directly connecting the groove with the oil sump whereby a bias force is applied to the vane to partially offset the unbalanced lateral force on the vane portion extending into the cylinder bore.

Abstract: A rotary compressor has a main bearing and a sub-bearing which are disposed on both sides of a cylinder, and a vane which is inserted at an eccentric crank pin portion of a crankshaft and is adapted to reciprocate while being in contact at one end thereof with a roller eccentrically rotating inside the cylinder. An oil feeding mechanism for the rotary compressor comprises: an oil feeding hole provided in a portion of the crankshaft closer to the end surface of a sub-journal of the crankshaft; an oil hole provided in a crank pin portion of the crankshaft such as to communicate with both the oil feeding hole and an oil groove formed on the crank pin portion; a spiral oil groove formed in the outer periphery of a main journal of the crankshaft such as to spiral in the direction opposite to the rotational direction of the crankshaft; and a spiral oil groove formed in the outer periphery of the sub-journal of the crankshaft such as to spiral in the same direction as the rotational direction of the crankshaft.

Abstract: A scroll compressor, such as may be used for a refrigeration compressor, having improved lubrication of bearing parts and sliding surfaces is disclosed. In accordance with the invention, the various components of the compressor, including both the orbiting and stationary scrolls and their driving components, are located in a housing, and lubrication passages are formed therein, such that an ample supply of lubricant is supplied to all bearing and sliding parts for all operating states of the compressor.

Abstract: A scroll-type pumping apparatus comprising a stationary scroll 1, an orbiting scroll 2 and a drive shaft 6 driving the orbiting scroll. A bottom end portion of the drive shaft is dipped in oil in a basin 150 formed at the bottom side of the apparatus. A compartment plate 30 is arranged between the basin and a motor 10 and 11 driving the drive shaft. Flow preventing means allows flow only in the direction from an upper side to a lower side of the compartment plate.

Abstract: A hermetic scroll compressor having a motor-driven compressor unit mounted in a hermetic housing and constituted by a scroll compressor section and a driving electric-motor section which are drivingly connected to each other through a rotary shaft supported by a bearing on a frame fixed in the housing. The scroll compressor section has a stationary scroll member and an orbiting scroll member having meshing wraps for defining compression chambers therebetween. The pressure of the fluid under compression is introduced into a back pressure chamber formed behind the orbiting scroll member so as to produce an axial thrust which presses the orbiting scroll member onto the stationary scroll member. A lubricating oil collected in the bottom portion of the hermetic housing is sucked up and delivered through a passage formed in the rotary shaft by the pressure differential between the high discharge pressure and the intermediate pressure acting in the back pressure chamber.

Abstract: A scroll-type pumping apparatus comprising a stationary scroll 1, an orbiting scroll 2 attached to an orbiting scroll shaft 4, and a crankshaft 14. An eccentric hole is formed in the end of the crankshaft and an eccentric bearing 26 rotates within this eccentric hole. The eccentric bearing has a central aperture eccentric to the bearing's outer circumference in which the orbiting scroll shaft is placed and freely rotates.

Abstract: A scroll-type fluid machine, preferably, a scroll-type compressor, having a small size and improved sealing between scroll members. An orbiting scroll is interleaved with a stationary scroll. A crank mechanism is provided for causing the orbiting scroll to undergo an orbiting motion. The crank mechanism includes a crankshaft and an eccentric ring rotated in an eccentric pattern by the crankshaft. Orbital movement of the orbiting scroll is transmitted from the eccentric ring to a shaft of the orbiting scroll. The distance between the center of rotation of the crankshaft and the center of the orbiting scroll shaft is made substantially equal to the radius of orbit when the center of rotation of the crankshaft, the center of the orbiting scroll shaft, and the center of rotation of the eccentric ring are arranged along a straight line in the stated order.

Abstract: A scroll compressor having an improved lubricating structure so that lubricating oil is supplied substantially instantaneously after the compressor is started to bearings and other sliding members. An oil storage section is formed by a hole in an upper end portion of the main drive shaft and a communicating hole in a drive shaft of the orbiting scroll. A lubricating hole extending longitudinally through the main shaft communicates with the oil storage section via a pipe of a determined height so that lubricating oil is pooled in the oil storage section when the compressor is stopped.

Abstract: A horizontal shaft oil pump is provided for use in a compressor comprising an outer housing having an inlet, an outlet, an oil sump, and a crankcase mounted therein. The crankcase has a generally vertically disposed passageway therein in communication with the oil sump, and a crankshaft is horizontally rotatably received in a bore in the crankcase. A reduced diameter portion of the crankshaft forms between the crankshaft and crankcase an annular chamber in communication with the passageway, and a pair of oppositely angularly disposed helical grooves are disposed in the crankshaft on opposite sides of and in communication with the annular chamber. Upon rotation of the crankshaft, a low pressure area is developed in the annular chamber causing lubricant to be drawn upwardly through the crankcase passageway and into the annular chamber. The rotating helical grooves deliver lubricant from the annular chamber to opposite end portions of the crankshaft for lubricating bearings and other moving parts.

Abstract: A positive displacement scroll type apparatus having first and second scrolls with interfitting vanes defining an interface which includes at least one close pocket adapted to move fluid from an inlet to an outlet. The outlet is located in one of the scrolls and is subjected to centrifugal force during operation of the compressor and this in turn causes the separation of lubricant from the compressed fluid by such centrifugal force. A lubricant collector is located at the outlet to prevent the lubricant from entering the remainder of a system with which the compressor may be associated.

Abstract: A horizontal compressor including an electric motor and a compressor element mounted in a case serving concurrently as an oil sump. The compressor element includes a cylinder, a shaft having a crank, a roller fitted to the crank for eccentric rotation along inner side surfaces of the cylinder, a vane moving in reciprocatory movement in a bore of the cylinder while abutting against the roller, two side plates located on opposite sides of the cylinder, one of the two side plates being formed with a suction port for a lubricant and the other side plate being formed with a discharge port for the lubricant, and a pump chamber defined by a back of the vane, the bore of the cylinder and the two side plates.

Abstract: A lateral rotary compressor comprises a compressing mechanism including a blade chamber for filling the lubricating oil, and a blade contained in the blade chamber and reciprocatingly movably between the first position where the blade chamber is increased to the maximum volume and the second position where the blade chamber is decreased to the minimum volume, and a supply tube for communicating the blade chamber with bearings and having an opening formed at the position located in a lubricating oil reservoir.

Abstract: In a sealed type scroll compressor including an intermediate pressure chamber in which a pressure intermediate in magnitude between a discharge pressure and a suction pressure prevails, a bearing device including a roller bearing and a plain bearing mounted on a frame for supporting a shaft section of a crankshaft. To reduce application of unsymmetrical load to the bearings and prevent an increase in a bearing friction loss, the roller bearing is located in a position close to a crank section of the crankshaft and the plain bearing is located in a position remote from the crank section.

Abstract: A lubricating mechanism for a scroll-type fluid displacement apparatus is disclosed. A driving mechanism for an orbiting scroll comprises a drive shaft and a drive pin projecting at an eccentric location from an inner end surface of the drive shaft. An annular boss projecting from a circular end plate of the orbiting scroll receives the drive pin. Therefore, the orbiting scroll is rotatably supported on the drive pin. The lubricating mechanism includes an oil passageway formed in the circular end plate of the orbiting scroll to communicate between the interior of the boss and one of the fluid packets located at the outer peripheral portion of the spiral elements. Lubricating oil thus flows into the interior of the boss and lubricates the bearing and other contact surface disposed in the center portion of the apparatus.

Abstract: A low frictional loss, rotary vane gas compressor utilizing a housing having a generally elliptical cavity therein, and a rotor disposed in the cavity, with the axis of rotation of the rotor being offset from the central axis of the cavity. The housing has an inlet passage and a discharge passage, each in contact with the cavity, with the rotor having a plurality of radial slots in equally spaced relation about its periphery. A slidable vane is disposed in each of these slots, with the outer tip of each vane being in close proximity to an inner stator wall that defines the outer boundary of the cavity. The vanes serve to define a plurality of chambers in the cavity, which chambers undergo significant volume changes as they move about the cavity during rotation of the rotor, the vanes thus cooperating with the inner stator wall to compress gas entering the inlet passage, such that as it leaves through the discharge passage, it is at a higher pressure.

Abstract: A trochoid-type rotary piston gas expansion device including a stationary housing and endwalls defining an epitrochoidal cavity closing where the cavity is symmetrical about a first axis transverse to the end walls, a rotatable crank shaft extending through the cavity parallel to the first axis, and having an eccentric portion located on the shaft in the cavity, a rotary piston mounted on the eccentric portion of the shaft so that the axial centerline of the piston describes a circular path of selected diameter during rotation thereof where the rotary piston includes flank surfaces which intersect at apices to determine lines of sealing contact with the walls of the cavity.

Abstract: Oil feeding device for feeding lubricant oil to bearings journalling a crank shaft connected to an orbiting scroll member of scroll fluid apparatus including recessed oil flow passages formed on the outer peripheral surface of the crank shaft in positions corresponding to a first plain bearing journalling a crank portion of the crank shaft and second and third plain bearings for journalling a shaft portion of the crank shaft respectively. The oil flow passage for the third plain bearing offers a lower resistance to the flow of fluid than the oil flow passages for the first and second plain bearings, to thereby avoid wear and seizure of the bearings.

Abstract: A scroll type fluid machine having two scroll members each having an end plate and a spiral wrap formed on the end plate, the scroll members being coupled to each other such that the wraps thereof mate with each other. One of two scroll members being adapted to make an orbitary movement with respect to the other scroll member while being prevented from rotating around its own axis, so as to form at least one working chamber of different pressures between two scroll members. At least two pressing force imparting chambers are formed on the opposite side of the orbitary scroll member to the wrap.

Abstract: A drive shaft (26) of a gear type fuel pump (2) forms a driving interconnection between an engine gearbox (4) and a shaft (14) which carries the driving gear (10) of the fuel pump. The drive shaft has a slightly diverging lubricant supply passage (65) which receives lubricant from an oil jet (70) in the engine gearbox and directs the lubricant to the engaged splines (44, 46) at the inboard end of the drive shaft. Lubricant from the area of spline engagement is returned to the gearbox via radial passage (78), annular lubricant return passage (68) and radial passage (80). O-ring seals (82, 84) on the drive shaft, which straddle a drain passage (86) prevent the mixing of the lubricant and the fuel which may envelop an intermediate portion of the drive shaft. Wear of the engaged, oil lubricated splines (40, 42) at the outboard end of the drive shaft should provide a general indication of spline wear at the inboard end of the drive shaft because both ends are exposed to similar lubrication.

Abstract: A system for lubricating the main drive shaft bearings in a scroll compressor enclosed within a hermetic shell. The drive shaft and its main bearings are supported in a frame that defines first and second chambers adjacent each end of a main bearing. Each of the chambers includes an opening to a spatial volume contained within the compressor shell. An oil pump at the lower end of the drive shaft supplies oil through a bore in the shaft to a swing link bearing and a thrust bearing, both disposed adjacent its upper end. Oil is dispersed into the spatial volume as a mist of oil droplets by the rotating elements connected to the drive shaft. Fan means are disposed within the second chamber and are operative to develop a differential pressure between the two chambers so that oil droplets are drawn toward the first chamber, lubricating the main bearing as they pass through it.

Abstract: A method and apparatus for lubricating a vacuum pump, preferably a rotary vane vacuum pump, wherein the pump rotor is mounted on a hollow drive shaft continuously fed with a lubricating oil stream under excess pressure from an oil pump, radial openings being provided in the hollow shaft for the outward supply of lubricating oil to the elements being lubricated with the lubricating oil stream from said oil pump being fed under excess pressure as a pulsating and preferably intermittent flow stream into the interior of the hollow shaft.

Abstract: The improved rotor bearing lubricating system for the rotor bearing of a Wankel type rotary internal combustion engine comprises an arcuate distribution channel in the surface of the eccentric portion of the mainshaft adjacent the inner bearing surface of at least 180.degree. in length and extending on both sides of an imaginary radial line passing through the point of the maximum throw of the eccentric portion.

Abstract: In a scroll-type compressor, the sum of pressure receiving areas of the upper end surfaces of crank portion of a crankshaft and the upper end surface of a balance weight is made substantially equal to the sum of the pressure receiving areas of the lower end surface of the shaft portion of the crankshaft and the lower end surface of the balance weight, the surfaces being subjected to internal pressures of the compressor. Consequently, only the downward force produced by the weights of the crankshaft and the rotor of a driving motor is applied to the crankshaft as an axial load which is born by a thrust bearing. Since the thrust bearing is required only to bear a small thrust load, it is free from the problems such as rapid wear and seizure.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated by lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

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: The front and rear side blocks are each formed therein with a first lubricating oil passage which supplies high pressure lubricating oil, and at least one of the side blocks is formed therein with a second lubricating oil passage communicating with the back pressure chamber formed within the rotor. The first and second lubricating oil passages each open at one end in the sliding peripheral surface of a plane bearing formed with the corresponding side block. The drive shaft has its interior formed with a lubricating oil chamber and its peripheral wall formed with at least one lubricating oil feeding hole communicating with the lubricating oil chamber.

Abstract: An oil feeding device for plain bearings supporting a crankshaft connected to an orbital scroll member in a scroll fluid apparatus, including axially extending oil flow passages formed on the outer peripheral surface of the crankshaft at portions journaled by the plain bearings but displaced from the lines of action of lateral loads caused by fluid pressure in the sealed space between two scroll members, thereby generating bearing oil film reactions commensurate with the lateral loads, so as to produce an optimum oil film pressure distribution for the bearings at all times.

Abstract: This invention relates to a method at oil-injected screw-compressors for balancing axial forces at at least one of the rotors of the compressor, for sealing the gaps between rotor housing and rotor shafts and for cooling and lubricating the bearings of the rotor shafts. At the high-pressure end of the compressor oil under pressure of such magnitude is supplied to the bearing spaces (28a,28b) at the ends of both rotors that an oil flow inward to the compression space along the gaps (32a, 32b) between the rotor shafts and the rotor housing is obtained for sealing against leakage from the compression space. Oil at this pressure further is supplied via a connection (42) from the bearing space (28b) of the female rotor to a pressure space (38) at the low-pressure end of the female rotor for balancing the axial force arising on the shaft end (31) of the female rotor on the high-pressure side due to the oil supplied to the bearing space (28b) of the female rotor.

Abstract: A dynamic cooler apparatus is provided for dynamically cooling molten plastic extrudate while pumping metered amounts of that extrudate to an extrusion die or the like. The dynamic cooler apparatus utilizes bi-helical gears in a gear pump configuration in a housing in which a heat exchange medium is circulated. The heat exchange medium is also circulated internally of the gears so that the gear teeth and the housing act to cool discrete volumes of extrudate from four sides defined by the gear teeth and the internal surface of the housing. The bi-helical gears are driven to minimize loading between the teeth thereof and to permit the teeth to be as small as practical to present more cooling surface for a given cross-section of extrudate and optimize the heat transfer capability of the dynamic cooler apparatus. Provision is also made to use the molten extrudate as a lubricant for the shafts and bearings of the bi-helical gears.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated with the lubricating parts effectively lubricated with the lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated with the lubricating parts effectively lubricated with the lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: A compressor-expander having a vaned rotor in which the vanes rotate about an axis which is canted with respect to the rotor axis. The housing of the device has a disc-shaped main cavity having adjacent hub recesses which are concentrically spherical. The cavity is in the form of a doubly truncated sphere canted with respect to the shaft axis. The rotor has a central spherical portion for mating with the recesses and includes an integral Saturn-like ring extending to the outer wall of the cavity to divide the cavity into first and second complementary sides of annular wedge shape. The vanes occupy radially extending slots in the rotor and serve to separate each side into successive chambers which vary cyclically in volume as the shaft rotates without requiring the vanes to bodily reciprocate either radially or axially. Each side is provided with inlet and outlet ports.

Abstract: The invention provides the mechanism for an internal combustion engine that utilizes a radial flow of combustible gases about the axis of a toroid or annulus cylinder. The principal components consist of a rhomboid linkage mechanism operating within a stationary cam. The mechanism sustains torque from two coaxial drive shafts upon which the mechanism imposes a compound rotary motion whereby an angular harmonic is superimposed over a constant angular velocity. This motion is applied through discs to two pair of pistons within the cylinder to effect a radial flow with a precisely defined theoretical cycle. Where the mechanics are used for a radial flow engine, the power generated is taken from the rhomboid mechanisms by a coupling and final drive shaft.Further the invention includes within its scope a method by which the discs are self sealing and the means of producing a multicylinder unit.

Abstract: A scroll type compressor unit including a compressor housing having fluid inlet and outlet ports, and two fixed and orbiting scroll members within the compressor housing. Each scroll member has an end plate and a spiral element which are maintained angularly and radially offset so that both spiral elements interfit with a line contacts between the spiral curved surfaces to define moving sealed off pockets. In order that the fluid may be reliably taken into all fluid pockets, the end plate of the fixed scroll member is formed with a suction port connecting to the fluid inlet port at a position adjacent to the outer terminal end of the orbiting spiral element. Thus, the fluid introduced through the suction port may be taken into a fluid pocket which is formed at the outer terminal end portion of the orbiting spiral element and is sent along the outer surface of the orbiting spiral element to a fluid pocket which is formed at the outer terminal end of the fixed spiral element.

Abstract: A scroll-type refrigerant compressor unit is assembled by inserting parts into the compressor housing in a predetermined order and by finally securing a front end plate onto the compressor housing by bolts, which simplifies the production of the compressor unit. A drive shaft is supported by a single radial bearing, and a disk rotor having a drive pin to effect the orbital motion of the orbiting scroll member is fixedly mounted on the inner end of the drive shaft and is supported on the front end plate by a thrust bearing. Thus, the drive shaft and, therefore, the compressor unit are reduced in length and deflections and vibrations of the drive shaft are prevented. A lubricating system is provided to lubricate the shaft seal assembly on the drive shaft wherein the oil in the compressor housing is directed to the shaft seal cavity and returns to the interior of the compressor housing after lubricating the radial and thrust bearings and other parts.

Abstract: A Wankel-type engine has a housing with a chamber therein having parallel, axially spaced side surfaces joined by an end surface which has a semi-circular contour in an axially longitudinal plane. A rotor, eccentrically mounted on a shaft carried by the housing for rotation in the chamber, has a pair of side portions adjacent to the chamber side surfaces and a plurality of lobes, each having an end portion which has a semi-circular configuration corresponding to the semi-circular contour of the chamber end surface. Multi-layer, self-expanding seals engaging the chamber end surface are carried by each rotor end portion, and the rotor side portions carry seals engaging the chamber side surfaces. Lubrication is supplied to the seals. The semi-circular chamber end surface is provided on a separate member mounted between a pair of housing members, or alternatively is provided on complimentary portions of a pair of housing members.

Abstract: A rotary expansion power unit, such as a steam engine, which has a planetating rotor in a housing having an epitrochoidal cavity. In known engines, hot expansion fluid is directed through a hollow interior in the rotor and surrounds the rotor journal bearing. This leads to excessive expansion of the rotor and requires an excessive flow of cooling oil to the bearing. The invention isolates the expansion fluid from the interior of the rotor by having a valve disc fastened to the rotor crankshaft with a first seal means between the valve disc and housing end wall and a second seal means between the valve disc and rotor.

Abstract: A rotary piston engine including a lubricating system having an oil passage extending axially through an eccentric shaft for supplying lubricating oil from an oil pump to bearing portions. A pressure regulator valve is provided in said oil passage in the eccentric shaft so that the oil pressure as regulated by the regulator valve is not affected by the centrifugal force which may be produced in the oil passing through a radial passage between the oil pump and the oil passage in the eccentric shaft. The regulator valve may include a temperature sensor which is responsive to the surrounding temperature.

Abstract: A positive displacement rotary pump is provided for use in circulating a viscous product at high pressures. The pump includes a housing having a product inlet and a product outlet communicating with an interior cavity. One wall of the cavity is defined by a removable cover. A pair of spaced substantially parallel shafts extends through a wall of the cavity opposite the cover wall. One end of each shaft is supported by the cover. A pair of meshing rotors is locked on the shafts and disposed uniformly within the cavity. The endface of each rotor adjacent the removable cover has a substantial countersunk portion. Bearing means, substantially isolated from the product, is disposed within each rotor endface countersunk portion and supportingly engages a segment of the rotor shaft one end. At least a portion of each bearing means is located between planes defined by the surfaces of the cover and the wall opposite thereto which coacts to form the cavity.

Abstract: A system for cooling the bearings supporting the shaft of a rotor in a pneumatic motor powered with hot pressurized fluid. The rotor responds to the flow of hot fluid under pressure by moving to develop output power. The rotors which conduct heat from the hot fluid through the shaft and into the bearings have a series of peripheral axial slots adjacent the ends of the shaft. Fasteners engage the shaft to position the bearings over the series of axial slots. A manifold connects the slots to a discharge conduit. Some of the hot pressurized fluid is diverted through a nozzle in the discharge conduit to create a pressure differential between the manifold and the surrounding environment. This pressure differential draws air from the surrounding environment through the slots and into the manifold. The air on flowing through the slots absorbs heat from the shaft and the inside of the bearings to thereafter maintain the temperature of the bearing below the hot fluid.

Abstract: A multi-unit rotary piston mechanism having each unit separately, rotatively, dynamically balanced and connecting the mainshafts of each unit to each other by a coupling assembly which permits radial and axial flexibility relative to the mainshaft axes and provides adequate torsional capacity for torque transmission between the mainshafts.

Abstract: An improved rotary vane machine assembly of the type utilized for producing vacuum in motor vehicle power brake assistance units wherein a compensating coupling connects the pump drive shaft with the drive motor of the pump and a lubricant is supplied to the working elements of the pump from said drive motor, the improvement comprising a pot-shaped hood which receives the working components of the pump and, in particular, the rotor and vanes, and a mounting flange having a bell-shaped foot portion surrounding the compensating coupling and a lid portion covering the open end of the pot-shaped hood. A compensating disc which limits the operating chamber of the working components in an axial direction is also disclosed, the compensating disc being pressed against the face of the vanes by means of a cushion of lubricant and/or a compression spring.

Abstract: In a rotary compressor of the sliding vane type, the vanes maintain sliding contact with the inner wall of the housing while moving periodically inward and outward in generally radial slots in the cylindrical rotor, which is provided with conduits for injecting oil or other liquid into the working chambers formed by the rotor, the vanes and the housing's inner wall. The housing has inlet ports for a gas to be compressed in the working chambers and has outlet ports for the compressed gas. Valves are provided to open and close said rotor conduits in synchronism with said periodic moving of the vanes, whereby the liquid is injected into the working chambers only during such periods when these chambers are closed to the gas inlet and outlet ports.

Abstract: An improved design for sealing and lubricating the moving parts of a rotary vane pump. An effectively operating lubricant distributing system is obtained in such a pump by forming radially extending passages through the pump drive shaft and attached rotor which connect the lubricant carrying hollow portion of the drive shaft with chambers located between the base of the vanes and the slits formed in the rotor in which the vanes radially slide. The rear bearing in which the drive shaft rotates is connected to these vane base chambers by means of an annular compartment having a lubricant duct connected thereto, thereby insuring the continuous flow of lubricant from the hollow portion of the drive shaft, through the vane base chambers and into the rear bearing. In an alternative embodiment of the present invention, the front bearing of the pump is connected with the hollow portion of the drive shaft via a lubricant passage formed on the suction side of the vanes.

Abstract: This invention relates to a method at oil-injected screw-compressors for balancing axial forces at at least one of the rotors of the compressor, for sealing the gaps between rotor housing and rotor shafts and for cooling and lubricating the bearings of the rotor shafts. At the high-pressure end of the compressor oil under pressure of such magnitude is supplied to the bearing spaces (28a,28b) at the ends of both rotors that an oil flow inward to the compression space along the gaps (32a,32b) between the rotor shafts and the rotor housing is obtained for sealing against leakage from the compression space. Oil at this pressure further is supplied via a connection (42) from the bearing space (28b) of the female rotor to a pressure space (38) at the low-pressure end of the female rotor for balancing the axial force arising on the shaft end (31) of the female rotor on the high-pressure side due to the oil supplied to the bearing space (28b) of the female rotor.