Abstract: A rotor assembly having a first component and a second component. The second component is secured within a bore of the first component by a first adhesive and a second adhesive. The first adhesive forms an annular seal between the first component and the second component, and the second adhesive extends from the first adhesive and has a lower viscosity than that of the first adhesive.

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 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: An apparatus for removing a stator tube from a position about a rotor of a progressing cavity pump is provided. The apparatus includes an actuator assembly having a base and a piston which is longitudinally displaceable relative to the base, and a pusher rod. The base of the actuator assembly is removably attachable to a discharge end of the stator tube. The pusher rod is longitudinally releasably attachable to the piston at a plurality of locations along the length of the pusher rod and is located to engage the rotor when the base is coupled to the stator tube. The pusher rod is coupled to the piston and the piston is driven by the actuator assembly. With only slight modifications the apparatus may also be used to install the stator tube on the rotor when operated in a substantially opposite way.

Abstract: An oil rotary vacuum pump of mechanical type (100) 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 (3, 17) of the pump, which are sealed by means of a removable sealing member, for instance by means of a membrane (21, 23).

Abstract: A vane pump includes a casing having a cylindrical inner bore and a rotor disposed in the inner bore with an eccentric relation thereto, forming a circular pump chamber between the rotor and the inner bore. The circular pump chamber is divided by vanes held in the rotor into pump chambers changing their capacities according to rotation of the rotor. A gravity center of the rotor is shifted from the rotational center of the rotor by removing or adding some weight, so that an imbalanced centrifugal force is applied to the rotor. The driving shaft and the rotor are tightly coupled to each other by the imbalanced centrifugal force even if there is a small gap or dimensional errors therebetween.

Abstract: A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.

Abstract: The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the instantaneously operated stator or is configured in a single piece. Upon occurrence of a defined amount of wear, this stator combination is merely reversed through 180° relative to the longitudinal axis or an intermediate tube is inserted so that the spare stator arrives in the rotor region.

Abstract: Compressor performance is affected by the size of an economizer or by-pass port area. To achieve variation in size, an insert is inserted into an economizer and/or unloader flow passage to provide a desired port area. The insert may be selected from a number of available insert sizes having different sized openings. In this way, a compressor designer can minimize machining time by keeping same flow passage geometry for different compressor sizes and applications.

Abstract: A bearing assembly (20) for a pump (12), e.g., an internal or external gear pump includes a journal bearing block (20) having a length, a width, and an axial centerline (CL?) passing through a center of the journal bearing block (20) with respect to the length. The journal bearing block (20) includes at least two journal bearing bores (21), the journal bearing bores (21) each having a center (C), wherein a bearing bore centerline (CL) extends between the centers (C) of the journal bearing bores (21) and in parallel with the bearing bore centerline (CL). The bearing bore centerline (CL) is offset with respect to the width of the journal bearing block (20) and the axial centerline (CL?). The bearing assembly (20) is particularly applicable to gear pumps, such as external gear pumps for fuel applications.

Abstract: A method for manufacturing a multi-stage compression type rotary compressor which avoids the replacement of parts to be used as much as possible to reduce costs and also which enables easily setting an appropriate displacement volume ratio between first and second rotary compression elements without increasing the size of the compressor outer housing. This is done by altering the inner diameter of the cylinder of one of the rotary compression elements without altering the thickness (or height) of this cylinder to set a displacement volume ratio between the first and second rotary compression elements to an optimum value in accordance with the alteration.

Abstract: An improved rotary vane compressor includes an elongated housing having a main part and two ends. An inlet/outlet end plate member positioned at one end of the housing has an inlet port and an outlet port. The end plate member is one of a first type having ports constructed for tube-type connections and to receive a tube type conduit or a second type having an ports constructed for threaded type connections. Intermediate adapter member positioned between the housing and the end plate member, is secured to the housing and adapted to receive an end plate member of either the first type or the second type.

Abstract: A compressor has a compression unit for compressing gas to a desired pressure, a drive shaft and a balancer. The drive shaft is connected to the compression unit for driving the compression unit. Imbalance on the drive shaft is generated due to movement of the compression unit. The balancer is mounted on the drive shaft and includes a main portion and adjustable portion for correcting the imbalance on the drive shaft. Preferably, at least one of the weight and the shape of the adjustable portion is adjustable.

Abstract: A device for pumping fluid has a hydraulic pump (10) and a drive (12). The hydraulic pump (12) is produced as an independent component with different types of drive devices (12) as additional components that can be coupled in the form of a modular system, and is configured as a coupling piece (14) for this purpose. Hydraulic tanks (16) having different volumes represent a third, different type of component. Each hydraulic tank (16) can be connected on one side to the coupling piece (14). The corresponding drive device (12) can be connected on the opposite or same side of the coupling piece (14). The coupling piece (14) is built as a single component and embodied in the form of a base plate. The hydraulic pump (10) is an external gear pump (20), whose toothed wheels (22) are received or integrated into the base plate. A compact, modularly constructed building block system is achieved which is functionally reliable and easy to maintain.

Abstract: The invention relates to apparatus having a feed pump and scavenge pump arrangement and components for the same in an improved manner which allows an increase in efficiency of operation of the pumps and also, at the same time, improved ease of manufacture of the components. The feed and scavenge pump arrangements are provided in a common body which has a feed pump chamber and scavenge pump chamber connected to an oil reservoir and crankshaft and sump respectively by a series of bores which are shaped so as to allow connection with the same and also shaped to avoid conflict with fixing locations on the body of the apparatus.

Abstract: A scroll fluid machine comprises a stationary scroll that has a spiral stationary wrap, and an orbiting scroll that has a spiral orbiting wrap to form a compression chamber between the stationary and orbiting wraps. In the stationary and orbiting wraps, an outer low-pressure pressurizing portion is separated from an inner high-pressure pressurizing portion. A plurality of outlets and inlets are formed in the low-pressure and high-pressure pressurizing portions respectively. At least one of the outlets or at least one of inlets is selectively closed.

Abstract: A modular oil pump for use in combination with an internal combustion engine having a dry sump lubrication system. The device features a first gerotor pump having an intake port engageable in communication with at least one engine sump and having an discharge port engageable in sealed communication with a fluid reservoir for the dry sump system. A second gerotor pump, engageable in sealed communication with the fluid reservoir has a discharge port fluidly engageable with the engine lubrication system oil supply conduit. Both the first pump and second pump are assembled from separate housings, and cooperatively engaged inner and outer gears sized for rotation and in line mounting on the engine crankshaft inside a cavity in the housings. The volume pumping capacity of the first pump at a ratio to efficiently drain fluid and gas from the engine sumps and supply the reservoir with a constant supply of lubrication fluid.

Abstract: A housing for a micro pump or like micro system has at least three structured elements which are layered and which respectively form a support plate, a connecting block and a base element with a further plate-shaped layered structure element located between the connecting block and the support plate and serving with the axially oriented or circumferentially-oriented channel section for conveying fluid between the connecting block and the support plate.

Abstract: This invention is directed to a pump bracket that is adapted to allow for the inboard or outboard mounting of a mechanical seal or packing material to accommodate different pump configurations and applications. The universal pump bracket includes a first flange that is adapted to be connected to a pump housing and a second flange, which is laterally displaced from the first flange and adapted to be connected to a bearing carrier. If an inboard mechanical seal or inboard packing arrangement is desired, the bracket can be installed so the seal is facing the inboard direction. Alternatively, if an outboard seal arrangement is desired, the bracket can be installed on the rotor so the seal or packing faces the outboard direction.

Abstract: The invention provides a rotary-vane machine having a stationary shell including a casing member (2), a camming ring (4) having an internal, noncircular camming surface (6), and a flange member (8); a rotor (10) including at least two first vanes (12) fixedly attached to, or integral with, the rotor (10), a first cover plate (14) fixedly attachable to the rotor (10); a second cover plate (16) fixedly attachable to the rotor and integral with a first shaft (22) supported on its free end by bearing (26) mounted in the casing (2), and being provided with at least four ports (a) for access or egress of a working medium; a second shaft (23) supported by a first bearing (28) accommodated in the first cover plate (14) and by a second bearing (30) accommodated in the second cover plate (16); at least two second vanes (38) fixedly attached to the second shaft (23) and oscillatably accommodated within the rotor (10), and defining, together with the rotor (10), the first vanes (12) and the first and second cover plates

Abstract: A hydraulic gear machine, in particular an internal gear machine having two gear wheels which mesh with each other in a chamber of a multipart housing, a sealing plate arranged on the side of the two gear wheels axially between them and a housing part, and a pressure field which is present in the housing part on the high-pressure side, is open towards the sealing plate, and is adapted to be acted on by high pressure. The order to provide embodiments of the gear machine which differ in their direction of rotation with the use of many of the same parts, a second pressure field is present in the housing part and the first pressure field is present only on the one side and the second pressure field only on the other side of a center plane which is defined by the axes of rotation of the two gear wheels so that a piece of the housing part is still present between the two pressure fields.

Abstract: A scroll-type apparatus includes a radial compliant drive. The radial compliant drive is achieved by using a set of corresponding flat driving surfaces with one of the drive surfaces being located on a drive bushing and the other being located on a crankshaft. The drive bushing is provided with a pair of flat drive surfaces with each flat drive surface of the drive bushing capable of mating with the drive surface of the crankshaft in a different geometrical fashion to provide two different radial driving loads.

Abstract: A scroll machine has a multi-functional device which is attached to either or both of the scroll members that serves the purpose of optimizing or altering the discharge port geometry to a specific compression ratio or for modulation of compression ratios for performance optimization.

Abstract: An improved rotary device (20), such as a fluid pump or motor, includes a housing (24) which encloses a working unit (22). The working unit (22) includes a cam ring (38) which cooperates with a rotor (40) and a plurality of vanes (42) to form a plurality of variable volume working chambers. The housing (24) includes a main section (26) and a cover section (28). The main section (26) of the housing (24) has three separate risers (122, 124 and 126). Any one of the three risers (122, 124 or 126) may be connected with a fluid conduit (116). The main and cover sections (26 and 28) of the housing (24) are movable relative to each other to enable the rotary device (20) to be mounted in a selected one of a plurality of orientations on a support structure.

Abstract: A scroll machine has a multi-functional device which is attached to either or both of the scroll members that serves the purpose of optimizing or altering the discharge port geometry to a specific compression ratio or for modulation of compression ratios for performance optimization.

Abstract: An apparatus includes a rotary compressor having an inlet end, a discharge end, and a predetermined built-in volume ratio. The compressor has at least one rotor which is encased by a housing which is defined by at least a first portion and a second portion. The second housing portion has formed therein a first discharge port dimensioned as a function of the predetermined built-in volume ratio. A removable plate has formed therein a second discharge port dimensioned as a function of the predetermined built-in volume ratio. The removable plate mounts on the housing intermediate the first and second housing portions. When the plate is mounted on the housing the first and second ports cooperatively, fluidly communicate with the discharge end of the compressor.

Abstract: An eccentric screw pump comprises at least one stator, a rotor having a core and received for eccentric rotation in the stator, a first coupling device adapted to connect one end of the rotor to a drive system, a second coupling device provided at another end of the rotor, the coupling devices having external dimensions which are smaller than a diameter of the core of the rotor.

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: Helical screw rotors for a screw rotor machine wherein, for both the male and female rotor, the rotor profile includes involute curves for the male and female rotor lobe tip portion and rotor root portion, thereby generating mating involute curved surfaces of the corresponding groove, root and tip portion for the female rotor, resulting in low leakage path between the high and low pressure volumes when the rotors are in mesh, and causing ramps on the lobe tips of both the male and female rotors to form high points thereof which act as sealing strips during intermesh rotation of the rotors and in conjunction with the screw rotor machine casing.

Abstract: A roller vane motor as described, the motor having a stator with a generally cylindrical chamber provided with fluid inlet and outlet means. A rotor is provided in the chamber to be rotatable therein, the rotor having a slot to receive a roller which forms a seal between the rotor and said chamber. The roller is urged into the sealing condition by means of drive fluid flowing behind the roller. A twin-roller version is also described as is a motor assembly made up of a number of vane motors arranged in line.

Abstract: A centrifugal pump mounting structure which allows easy, sturdy, and reliable mounting of a pump on a support bed in several different attitudes. The mounting system of the present invention includes legs situated at the opposite side of the pump to that of the pressure outlet opening and on both sides of the longitudinal plane passing through the pump shaft and the pressure outlet opening; in which the legs have two planar surfaces for mounting of the pump; and in which there are, on both sides of the pressure outlet opening substantially in the longitudinal plane passing through the shaft of the pump, brackets with planar mounting surfaces for mounting the pump.

Abstract: A rotary fluid machine comprising a housing, a drive disk, a drive shaft, inner and outer cylindrical assemblies, and a plurality of vanes. The drive disk is supported within the housing for rotation about a first axis, and the drive shaft is connected to the drive disk to rotate that disk about the first axis. The inner and outer cylindrical assemblies extend within the housing, and the housing, the drive disk, and the inner and outer cylindrical assemblies form a working chamber that extends around, eccentric to, that first axis. The vanes are connected to the drive disc and are located in the working chamber to compress or to drive a fluid therein.

Abstract: The invention provides an oil pump as a replacement for the conventional piston type oil pumps used in Triumph motor cycles. The pump of the invention comprises a plurality of plates with a feed pump section between a pair of plates and a scavenge section between another pair of plates. Appropriate bores and galleries are provided between the plates for the pumping of the oil. The pumping sections are formed by rotary lobed pump members.

Abstract: A sliding vane type rotary compressor, of which refrigerating capacity at the high speed operation of the compressor is suppressed by making use of suction loss involved when refrigerant pressure in the vane chamber becomes lower than the pressure of the refrigerant supply source in the suction stroke of the compressor. The compressor has a rotor, vanes slidably carried by the rotor, a cylinder accommodating the rotor and the vane, side plates fixed to both sides of the cylinder for closing both open ends of the vane chambers defined by the rotor, vanes and the cylinder, and suction and discharge ports serving as passages for communicating the vane chambers with the outside of the compressor. A spacer for adjustment of the refrigerating capacity is disposed in the suction port.

Abstract: A pump housing containing an inlet and an outlet and enclosing two meshing pumping gear wheels is connected through an intermediate bearing plate to a transmission housing comprising a base arrangement and enclosing two meshing auxiliary gear wheels. An end bearing plate is disposed on the side of the transmission housing which is remote from the pump housing. The two bearing plates and the transmission housing are designed to be mutually mounted with respect to one another in four relative rotational positions, each rotated by 90.degree. with respect to a primary axis of the gear pump. The pump housing and the intermediate bearing plate are designed to be mutually fastened to each other in two relative rotational positions, each rotated with respect to one another by 180.degree. about the primary axis.

Abstract: A power steering pump includes a pump housing (12) and a chambered sheet metal casing (14) around the pump housing. The pump housing and casing cooperate to define a fluid reservoir (22) for the power steering system. The pump housing defines a cylindrical outer surface (30) and the casing defines a circular opening (24) through which the pump housing extends into the casing chamber. An annular groove (32) circumscribes the pump housing cylindrical surface and receives an O-ring seal (34). An annular rim (36) is defined by the casing around the opening into the chamber. The annular rim (36) extends parallel to and closely adjacent the cylindrical outer surface (30) of the pump housing and cooperates with the O-ring (34) to effect a fluid-tight seal between the pump housing and casing. The casing is rotatable relative to the pump housing so that the fluid reservoir is adjustably positionable rotatably relative to the pump housing.

Abstract: The invention pertains to vacuum pump structure, and the innovations include a multiple pumping chamber pump wherein substantially identical pumping chambers may be assembled in contiguous relationship, and by the selective use of a pump head plate mounted upon both chambers the pump may operate in either a series or parallel mode. Further innovations include a novel air conducting nozzle which minimizes oil loss, and the pump employs a combination carrying handle and base interposed between the motor and pumping structure which facilitates assembly and handling.

Abstract: An assembly of plate members for forming a commutator valve for hydraulic devices of the expanding-contracting pocket type, such as hydraulic motors. The assembly includes a first end plate, a second end plate and a plurality of intermediate plates therebetween. The first end plate includes first and second arrays of fluid passageways for communicating with expanding and contracting fluid pockets, respectively, during operation of the motor. The intermediate plates may be assembled together in either a first or a second alignment depending upon the desired direction of rotation of the hydraulic motor. The intermediate plates are designed such that in the first alignment they direct high pressure fluid from a high pressure port to the first array of passageways and low pressure fluid from the second array of passageways to a low pressure port. The output shaft of the hydraulic motor thus rotates in one direction.

Abstract: A nutating pump of the type which has a rotatable shaft with a central member with an annular support groove at an angle to the shaft in which a disk is moveably supported and is restrained against rotation by a partition inserted in a radial slot in the disk, and has conial sections coaxial with the shaft and positioned on either side of the central member, the peripheral surface of the conic sections and the annular groove being at substantially the same angle with respect to the shaft. One such pump includes moveably replaceable central members and conic sections whereby the operating characteristics of the pump may be changed without having to replace the pump body. In another embodiment, a cylindrical insert is included in the radial slot in the disc, and grooves are included in the peripheral surfaces of the conic sections to receive the cylindrical insert as it passes over the surfaces of the conic section.

Abstract: This pump is driven by a shaft which may rotate in either direction. The direction of flow of fluid at the inlet and outlet ports of the pump may be maintained the same regardless of the direction of rotation. When the pump is set for one direction of rotation, it may be adapted for use with the other direction of rotation by removing a single plate, turning the plate over, and replacing it. The plate is held by bolts whose removal does not cause disassembly of any other parts.