Abstract: An engine includes a housing defining an annular bore and a piston assembly disposed within the annular bore. The engine includes at least one valve configured to oscillate between a first position within the annular bore to allow the piston assembly to travel from a first location proximate to the at least one valve to a second location distal to the at least one valve and a second position to define a combustion chamber relative to the piston assembly at the second location. The engine includes an exhaust gas port disposed in fluid communication with the combustion chamber and a fuel distribution assembly configured to mix fuel from a fuel source and air from an air source into a fuel and air mixture at a location external to the combustion chamber and to deliver the fuel and air mixture to the combustion chamber.

Abstract: In order to suppress the damage and the degradation in durability of a bearing of an expander, simplify the configuration of the expander, and reduce the manufacturing cost thereof, an expander of the present invention includes an expander rotor that is rotationally driven by an expanding force transmitted from vapor of a working medium introduced into an expansion chamber and a first bearing that supports a first rotation shaft of the expander rotor to a vapor inlet, a casing includes therein first bearing chambers that have a pressure lower than that of the vapor inlet and accommodate the first bearing, and a passage that leads lubricant to a low-pressure portion having a pressure lower than that of the first bearing chamber is connected to a position above the lowermost portion of the first bearing in the first bearing chamber.

Abstract: A shunt pulsation trap for a screw compressor reduces gas pulsation and NVH, and improves off-design efficiency, without using a traditional serial pulsation dampener and a sliding valve. A screw compressor has a pair of multi-helical-lobe rotors that are housed in a compressor chamber that propel gas flow from a suction port to a discharge port of the compressor chamber. The shunt pulsation trap includes an inner casing as an integral part of the compressor chamber, and an outer casing oversized and surrounding the inner casing. The shunt pulsation trap houses at least one gas pulsation dampening device, and includes at least one injection port (trap inlet) branching off from the compressor chamber into the pulsation trap chamber and a feedback region (trap outlet) communicating with the compressor outlet.

Abstract: A shunt pulsation trap for a rotary lobe blower (pump) or vacuum pump reduces pulsation and NVH, and improves efficiency, without increasing overall size of the blower or pump. A rotary lobe blower (pump) or vacuum pump has a pair of synchronized parallel multi-lobe rotors that are housed in a transfer chamber and that propel flow from a suction port to a discharge port of the transfer chamber. The shunt pulsation trap includes an inner casing as an integral part of the transfer chamber, and an outer casing oversized and surrounding the inner casing. The shunt pulsation trap houses at least one various pulsation dampening device, and includes at least one injection port (trap inlet) branching off from the transfer chamber into the pulsation trap chamber and at least one feedback port (trap outlet) communicating with the blower outlet pressure.

Abstract: A compressor may include a shell, first and second scroll members, and a seal assembly. The shell defines a first and second pressure regions. The first scroll member may include a first end plate defining a chamber. The seal assembly may surround the discharge passage and fluidly separate the first and second pressure regions from each other. The seal assembly may include first and second sealing members. The first sealing member may prevent communication between the chamber and the second pressure region when a first fluid pressure within the second pressure region is higher than a second fluid pressure within the chamber. The first sealing member may define a leakage path when the first fluid pressure is lower than the second fluid pressure. The second sealing member may fluidly separate the chamber and the second pressure region when the first fluid pressure is lower than the second fluid pressure.

Abstract: A rotary compressor or expander include a cylindrical housing chamber, a rotatable cylindrical rotor mounted eccentrically with respect to housing chamber center, a cylindrical rotor liner free to move around the rotor, and a pivoting generally circular arc vane hinged to the rotor liner. Cavity or buckets engraved to the outer surface of the rotor liner together with corresponding inlet nozzle flow provide additional momentum impulse transfer from working fluid to expander eccentric rotor. The inlet of the rotary expander is equipped with a rotating valve synchronous to the eccentric rotor, regulating the admission time and duration of the entering working fluid. The exhaust of the rotary compressor is equipped with either a check valve or a rotating valve synchronizing the fluid discharge time and duration.

Abstract: A rotary piston internal combustion engine of the Wankel type has a housing (1) with a two lobed epitrochoidal inner peripheral surface (14) a shaft (8) journalled in end casings (3, 4), a rotor (9) eccentrically mounted on the shaft (8) and geared to rotate at one third speed of the shaft (8) whereby working chambers (34, 35, 36) are formed between flanks of the rotor (9) and the end casings (3, 4), which chambers vary in volume as the rotor (9) rotates, the rotor (9) being cooled by a cooling medium in a generally closed cooling circuit, the medium being circulated by a circulating pump (27), via connecting passageways (20, 18) in the end casings (3, 4) and an internal passageway (21) of the rotor (9), and through an external cooling heat exchanger (24), the cooling medium being blow-by gasses from the high pressure working chambers, which gasses have leaked past the rotor side seals (26) into the rotor cooling passages.

Abstract: The present invention provides a 2 stage rotary compressor (100) including a hermetic container (101), a 2 stage compression assembly provided in the hermetic container, wherein a low pressure compression assembly (120), a middle plate (130) and a high pressure compression assembly (140) are successively stacked from any one of upper and lower portions, a first discharge port (124) for discharging middle pressure refrigerant compressed in the low pressure compression assembly (120) a second discharge port (162p) for discharging high pressure refrigerant compressed in the high pressure compression assembly (130) and a third discharge port (172p) positioned at any one of the upper and lower portions of the 2 stage compression assembly to discharge high pressure refrigerant compressed in the 2 stage compression assembly to the hermetic container (101), wherein an area of the third discharge port (172p) is larger than 0.5 times of an area of the first discharge port and smaller than 1.0 times thereof.

Abstract: A pump, particularly to a vane-cell pump for a vacuum for brake boosters in motor vehicles or for drawing blow-by gas out of the crankcase of internal combustion engines, with a casing, a rotor and with at least one vane and a liquid cooling device, which is depicted by a simple, essentially cylindrical insertion bush for inserting inside the casing.

Abstract: A scroll compressor includes an oil separation region generally formed between the motor housing and upper bearing member. A long labyrinth channel is provided with the suction refrigerant gas flow path being redirected to facilitate coalescing of oil mist droplets out of the gas stream. An integral deflector plate can be provided on the upper bearing member to interrupt flow and facilitate coalescing of oil. Additionally, offset arrangements between motor housing outlet ports and through ports through the bearing member are provided to facilitate redirection of the refrigerant flow that can further achieve oil separation.

Abstract: A scroll fluid machine comprises a driving shaft in a housing. An orbiting scroll is eccentrically revolved around an eccentric axial portion of the driving shaft via a bearing. Air is introduced from outside through an intake port of a circumferential wall of the housing and directed toward the bearing by a guide to cool the bearing.

Abstract: Provided is an apparatus for preventing overheating of a scroll compressor including a first connection flow path for communicating a high pressure space and a low pressure space in a casing, a second connection flow path for communicating the first connection flow path and the low pressure space in the casing, a fluid refrigerant inflow guide pipe for guiding a fluid refrigerant from a refrigeration cycle system to flow into the low pressure space via the second connection flow path by connecting one side of the refrigeration cycle system with the second connection flow path, and a second connection flow path valve coupled to an inside of the first connection flow path, for opening/closing the second connection flow path according to a pressure difference between the low pressure space and the high pressure space, and a temperature sensing type valve coupled to an inside of the first connection flow path, for opening/closing the first connection flow path according to a temperature of the high pressure space

Abstract: A counter-rotating rotary-piston engine has an output shaft with a cylindrical inner cavity rotatably mounted on a single support spindle in the frame of an aircraft. The output shaft extends substantially through the length of the engine block, which is suitably journaled on the shaft or the spindle to permit its counter-rotation. Internal combustion power is transmitted to the output shaft by means of an inner rotary piston fixed to the shaft which cooperates in conventional manner with an outer working chamber in the engine block, thereby producing concurrent rotation of the shaft and counter-rotation of the engine block. Dual propellers mounted on the shaft and on the block improve thrust performance, balance the torques and moments of inertia of the two counter-rotating masses, and virtually eliminate any resultant torque to the aircraft.

Abstract: In order to improve a screw compressor for compressing a working medium, comprising an outer housing, two screw rotors which are arranged in the outer housing in rotor bores provided for them and a drive for the screw rotors, in such a manner that the sealing gap is subject to as little variation as possible it is suggested that a compressor screw housing, in which the rotor bores for the screw rotors are arranged, be provided within the outer housing and that a space be arranged between a substantial part of the compressor screw housing and the outer housing.

Abstract: A charge cooled rotary engine includes a housing, a first end plate, and a second end plate. The housing and end plates combine too define a closed chamber. A rotor disposed within the housing includes three flanks, a cylindrical hub, and a web extending transversely from the hub and joining medial portions of the flanks to the hub. The web, flanks, and hub form rotor cavities on opposite ends of the rotor. Inlets formed in the end plates for receiving fuel/air charge terminate in entry ports facing the closed chamber. Distribution chambers, formed in the end plates adjacent the entry ports, are open to the closed chamber. The entry ports directly communicate with the rotor cavities and are isolated from direct communication with any of the intake, compression, and combustion chambers by the rotor flanks.

Abstract: A charge cooled rotary engine includes a housing, a first end plate, and a second end plate. The housing and end plates combine too define a closed chamber. A rotor disposed within the housing includes three flanks, a cylindrical hub, and a web extending transversely from the hub and joining medial portions of the flanks to the hub. The web, flanks, and hub form rotor cavities on opposite ends of the rotor. Inlets formed in the end plates for receiving fuel/air charge terminate in entry ports facing the closed chamber. Distribution chambers, formed in the end plates adjacent the entry ports, are open to the closed chamber. The entry ports directly communicate with the rotor cavities and are isolated from direct communication with any of the intake, compression, and combustion chambers by the rotor flanks.

Abstract: A rotary engine includes a rotary shaft, a rotary piston carried by the shaft, a bearing structure supporting the shaft on one side of the rotary piston and a counterweight carried by the shaft on another side of the rotary piston. An air/fuel/oil charge is directed into a recess containing the counterweight and thereafter flows through engine components for cooling prior to combustion thereof in a combustion chamber.

Abstract: A scroll compressor includes a duct which is located within the discharge chamber of the compressor. The duct receives compressed fluid from the discharge port of the scrolls and directs the flow of the compressed fluid directly to the fluid port extending through the shell. The control of the discharge fluid directly from the discharge port of the scrolls provides a quieter and cooler operating compressor.

Abstract: An end plate 3a of an orbiting scroll 3 of an oil-less scroll compressor is provided with cooling holes 7 passing from the periphery of the revolving scroll through the central portion thereof. Using a pressure difference of about 100 mmAq between the ends of the cooling holes 7, the scroll compressor's own intake air is passed through the cooling holes to directly cool the revolving scroll.

Abstract: In a cooling device for a rotary piston compressor, in particular a screw-type compressor, which is part of a refrigerant circuit together with a condenser and an evaporator, coolant of the refrigeration system and oil serving to lubricate bearings as well as to cool and seal the screw-type compressor are injected into the screw-type compressor. In order to cool the oil serving to lubricate the compressor bearings separately and to thereby achieve a more economical functioning of the entire cooling device, it is suggested that only the part of the oil serving to lubricate the bearings of the compressor is cooled as a function of the oil temperature sensed behind the bearings and that a branched stream of coolant is used for this, the stream on its part subsequently being fed to the compressor again.

Abstract: A rotary air motor has a liner disposed within a tool housing and having a cylindrical bore therethrough. A rotor having radially slidable vanes is eccentrically rotatably mounted in the bore by bearings in the plates of the liner, the vanes cooperating with the rotor and the liner to define a plurality of rotating variable volume fluid compartments. A fluid inlet port in one end plate communicates sequentially with the fluid compartments. First and second exhaust ports respectively formed in the end plates also communicate sequentially with the fluid compartments, but the two exhaust ports are angularly offset from each other so that the fluid compartments communicate first with the exhaust port remote from the entry end plate and then with the exhaust port at the entry end plate. The exhaust passage from the remote exhaust port passes along the outside of the liner back to the entry end plate, thereby ensuring cooling of both ends of the motor.

Abstract: A gear pump which is fitted with a magnetic coupling (6) to ensure against leaks uses circulation of the pump fluid to cool the magnetic coupling. The circulation is established by supplying the pump rotor (4) with radial channels (24) which terminate in recesses on the periphery of the rotor and which are connected to an axial channel (26) in the rotor shaft leading to the end of the shaft which is nearest the magnetic coupling. The fluid which is drawn through the channels (24) is mixed with the main stream of fluid in a section which is cut out of the wall of the pump chamber (16), and fresh cooling fluid is drawn via the chamber (40) to the radial gap in the magnetic coupling.

Abstract: A pressurized fluid-driven engine includes an engine chamber defined by a housing having one or more endplates which include serpentine channels for the flow of temperature-regulating fluid. Preferably, each endplate has a pair of channels that each has a scroll pattern. The temperature-regulating fluid may be the same fluid that is employed in driving the engine. The fluid is utilized both to preheat the engine and to cool the engine during use. The engine may be coupled to a generator for the production of electrical energy.

Abstract: A tuned combustion air intake system for a rotary engine used in an outboard motor includes a plenum chamber mounted on the rear of the engine directly against the exhaust manifold, which plenum receives cooling air discharged from the engine. Air from the plenum chamber is directed into an elongated outlet conduit having an extended tuned length to provide an optimum pulsed air flow to the combustion air inlet of the engine. Direct attachment of the plenum chamber and integral outlet conduit to the rear of the engine eliminates extended length tubular connections of the prior art and allows the width of the engine to be kept to a minimum, thereby adapting the system to enclosure in a conventional cowl for an outboard motor.

Abstract: A vane compressor has at least one compression space defined between a rotor and a cylinder. A shaft seal and a bearing are fitted on a driving shaft and disposed adjacent to each other. A lubricating oil supply device supplies compression medium to the shaft seal and the bearing, through at least one passage extending between the at least one compression space and the shaft seal and the bearing. The at least one passage has an open end opening into the at least one compression space at a predetermined circumferential location at which pressure within the at least one compression space changes from a negative value into a positive value when each of the vanes passes the predetermined circumferential location, whereby lubrication and cooling of the shaft seal and the bearing is effected in an efficient manner.

Abstract: A multi-section Roots vacuum pump of the reverse-flow cooling type having a plurality of pump sections each having rotors fixed to two common shafts. The pump includes a housing in each of the pump sections having an inlet and an outlet for a gas to be pumped and enclosing the rotors, a peripheral gas passages arranged around the housing, and a peripheral coolant water passages arraged around the peripheral gas passages. The gas flowing through the inlet into the housing and delivered through the outlet is supplied to the peripheral gas passages to be cooled there, and at least a portion of the cooled gas is returned into the housing. The remaining portions of the gas which are not returned into the housing in the pump sections except for the last pump section are supplied to the inlet of the next pump section through the peripheral gas passage.

Abstract: A tuned combustion air intake system for a rotary engine includes a plenum chamber mounted on the engine block and receiving cooling air discharged therefrom. Air from the plenum chamber is directed into an elongated outlet conduit of a extended length determined to provide an optimum pulsed air flow to the combustion air inlet to the carburetor. The extended length outlet conduit is wrapped at least partially around the plenum chamber to provide a compact construction particularly suitable to adapting the engine for use in an outboard motor. A supplemental air outlet from the plenum chamber to a downstream portion of the outlet conduit may be utilized to bypass a portion of the conduit to provide a change in the tuned length thereof for optimizing performance at difference engine speeds.

Abstract: An intermittently operating pneumatic vane pump has a cylindrical seat for its rotor constituted by a ring of porous sintered material housed in a container. The lubricating oil is collected in an interspace between the ring and the container when the pump is operating and returns to the pump when the pump is stopped, to keep the ring of the seat impregnated.

Abstract: In a mixed cooling system for the piston of a rotary-piston internal combustion engine having a trochoid construction with a triangular piston and a liner surface in the form of a double arc of a circle, a fuel injector is arranged in a side-wall of the liner and its jet is directed toward the inside wall of the corresponding corner of the piston which forms the driving corner of the expansion chamber when the piston is about to reach its bottom dead point. The starting of the injection cycle is determined by a piston position in which the corner of the piston forming the driving corner of the expansion chamber intersects the straight line located in the axis of the injection jet, and the end of the injection cycle is determined by a piston position in which the driving corner of the expansion chamber has moved past the exhaust opening.

Abstract: A movable vane type compressor having a rotor rotatable within a cam cylinder. The inner peripheral surface of the cam cylinder and the outer peripheral surface of the rotor approach each other most closely at a plurality of positions which in combination define a plurality of compression chambers between these peripheral surfaces. The rotor carries a plurality of movable vanes which are movable radially inwardly and outwardly with their one ends held in sliding contact with the inner peripheral surface of the cam cylinder as the rotor rotates so as to cause suction, compression and discharge actions in each compression chamber. A refrigerant passage for introducing the refrigerant gas into the compression chambers is formed between the side plate closing one axial end of the cam cylinder and a front cover covering the side plate. The suction passage extends in a hook-like form in the direction of rotation of the rotor.

Abstract: A volumetric fluid compressor or a so-called scroll type compressor is provided in which a rotary shaft is placed centrally in the front side of a housing, a helical portion of a movable scroll member is contacted eccentrically with a helical portion of a fixed scroll member, the helical portion of the movable scroll member is rotated about the axis of the rotary shaft to which the movable scroll member is mounted with an offset, in such a manner that a closed space defined between the two helical portions may be contracted towards the center for compressing the refrigerant gas which may thus be discharged towards rear from the center of the fixed scroll member.

Abstract: A rotary fluid motor with an internal liner has an internal manifold system within the casing and liner which provides not only separations for the fluid involved, but cooling fins and a structural support for the liner. The function of the internal manifold is to provide cooling fins which is important for adequate cooling of the motor during operating.

Abstract: Parallel connected compressors are provided with an oil management scheme in which an oil equalization port on one compressor is connected via an oil return solenoid operated valve within a small diameter line to an injection port of a second compressor, and vice versa. When the oil level in one compressor drops to a level sensed by an oil float switch, the oil float switch changes state, the oil return solenoid operated valve is opened, feeding its injection port and energizing a one minute on delay timer. Failure of the oil float switch to reset itself causes the compressor to go off on oil failure, and the oil return solenoid operated valve is closed. If the oil float switch resets itself at any time during the first minute, upon resetting, an off delay timer is energized to keep the oil return solenoid operated valve open for an additional minute, and the compressor continues to operate.

Abstract: Screw compressor 32 and screw expander 70 are connected into a refrigeration system. The system includes a mist lubrication system which drives oil particles suspended in flowing gas past the compressor and expander bearings for long life operation.

Abstract: Cryogenic refrigeration system employs a power driven screw compressor which delivers pressurized refrigerant gas through a closed system to expand in a screw expander to produce refrigeration. The screw expander is rotatively coupled to the compressor. The screw compressor-screw expander cryogenic system includes heat exchangers and operates on the closed Brayton cycle to produce refrigeration.

Abstract: Screw fluid machines are for use as a compressor for generating high pressure gas, a cooling-medium-compressing compressor for use in a refrigerator or an air conditioner. The fluid machine includes a rotor casing, two side-casings, a pair of screw rotors, and accessories such as silencer, a gas cooler, an oil cooler, and an oil tank. The rotor casing includes an outer wall, an inner wall and interconnecting members or ribs which interconnect the outer wall and the inner wall, with a space being provided between the outer wall and the inner wall. This space is partitioned into two or more spaces by means of the aforesaid interconnecting members. A working chamber or space is provided inwardly of the inner wall and has an inlet port and a discharge port. Both side-casings are secured to the opposite end faces of a rotor casing through the medium of flanges and are provided with a passage adapted to bring two or more spaces thus partitioned, into communication with each other.

Abstract: A method and apparatus for the compression of compressible fluids wherein a fluid is first compressed within a constant volume with addition of heat, and then further compressed in a compressor means increasing the fluid pressure and temperature. After compression, the fluid is passed into a heat exchanger for heat removal, with the heat so removed usually being used as the heat being added into the fluid in the initial step. After passing through the heat exchanger, the fluid leaves the process. Various types equipment may be used, including vane, piston, screw or other positive displacement type apparatus. In an alternate arrangement, heat may also be removed during the compression in the compressor means. Also, work may be extracted from the fluid after leaving the heat exchanger heat removal.

Abstract: Disclosed herein is a rotary internal combustion engine comprising a housing including walls defining a rotor cavity having axially spaced sides, a rotor shaft rotatably supported by the housing, extending through the rotor cavity, and including an eccentric, a rotor rotatably supported on the eccentric and within the rotor cavity, which rotor includes equi-angularly spaced apexes which, together with the rotor cavity, define working chambers rotatable within the rotor cavity, which rotor also includes side seals engaging the rotor cavity sides to restrain leakage of pressure from the working chambers, meshed gears on the rotor and on the housing for causing rotation of the rotor on the eccentric and rotation of the rotor shaft relative to the housing, and a gas recirculation system extending, at least in part, in the housing and including means defining a closed gas recirculation path including a first path portion in the rotor, a second path portion in the rotor shaft, a third path portion located to receiv

Abstract: In the embodiment depicted, the system comprises a gas compressing arrangement of first and second rotary compressing stages with an intercooler and an aftercooler for condensing and removing moisture from the compressed gas product. In order to cool the gas compressor, generally, and the second-stage rotor shafts in particular, the cooled, de-moisturized, compressed-gas product is used. Thus, the second-stage rotor shafts are axially bored or hollowed, and a tube is supported within the bore. The tube is through-connected with the outlet of the aftercooler to admit the cooled, compressed gas product into the bore, and, in turn, the compressed gas product is discharged from the bore. Accordingly, the cooled, compressed gas product is cycled through the bore, constantly to cool the shafts all the while that the compressor is running, or under load.

Abstract: A rotary internal combustion engine having an induction passage formed in part in the rotor of the engine, whereby the inducted air flows through and cools the rotor, has a heat exchanger adapted to cool the air flowing from the rotor before it is inducted into the working chambers of the engine. The heat exchanger may be arranged to be operable only when the region is operating at or above a predetermined load.

Abstract: A rotary engine wherein a side port is formed in one side housing, and a main peripheral port, communicating with the side port, and a bypass peripheral port, communicating with a bypass passage formed in another side housing, are formed in a rotor housing, the side port being maintained in communication with the carburetor through a passage formed in the rotor, while the bypass peripheral port communicates with the carburetor by bypassing the passage in the rotor. Respective valves are mounted in the main peripheral port and the bypass peripheral port, and the two valves are closed or throttled at low engine speeds. The bypass peripheral port opens at higher engine speeds than the main peripheral port.

Abstract: A pair of sealed engine rotors are connected by links and cranks to a single shaft for simultaneous operation one-quarter turn out of phase. The use of internal gears and eccentrics for driving the two rotors is avoided. The expanding charge in the chamber containing the second rotor is diverted back into the chamber for the first rotor whereby this charge may further expand and assist in driving the first stage rotor. The rotor chamber profiles are free of abrupt humps, thus avoiding seal shock and wear and chatter marks on chamber surfaces. Vaporized fuel is utilized to cool the engine by passage through the centers of the rotors. Increased compression, greater rotor speed and more usable power are fully-achieved features.

Abstract: Rotary piston engines of the kind in which the air inducted into the working chambers of the engine passes through an induction passage which is formed in part in the rotary piston of the engine, the rotary piston thereby being cooled by the air flow therethrough, a member is secured to the main engine housing which forms an air reservoir chamber having at least the same and preferably twice the volumetric displacement of the engine in the induction passage between the part thereof formed in the rotor and an inlet port to the working chambers.