Abstract: A pressure relief assembly for use with a paint pump having a chamber with a pressure relief port located immediately adjacent an inlet port of the pump. The pressure relief assembly includes a mounting member, inlet washer, rupture pad and outlet washer. The mounting member is threaded on its exterior surface and includes an inlet end, an outlet end, and a relief passage extending between the inlet and outlet ends. A rupture recess in the inlet end is sized to receive the inlet washer, rupture pad and outlet washer, with the rupture pad positioned between the washers. The inner diameter surface of the outlet washer is convex. The pressure relief assembly is screwed into the pump with the inlet end adjacent to the pressure relief port. The rupture pad forms a seal between the pump chamber and atmosphere that ruptures to vent the chamber when the pressure within the chamber exceeds a predetermined rupture pressure.

Abstract: A page pack for a printing press wherein the housing for the ink pump and motor assemblies also serves as a heat sink for the heat generated by the motor drive units. The housing comprises a body for receiving a plurality of positive displacement ink pumps each comprising a pump cylinder and at least one pump piston, with all such bores being arranged substantially parallel to each other and lying in a given plane. The housing includes openings for accommodating pump drive motors with their output shafts arranged so as to lie parallel to each other and in a plane slightly offset from an intersecting plane in which the pumps are positioned.

Abstract: A gerotor pump having reduced drag torque at low temperatures is disclosed. The pump includes a shaft journalled in the housing. Mounted on the shaft are a pair of axially space metallic port plates and disposed therebetween are metallic interior and exterior gears. A ceramic eccentric ring circumscribes the exterior gear to define a diametral clearance.

Abstract: A product filling assembly includes a rotary member which has two discs mounted for rotation on a common central shaft and a plurality of additional shafts and rollers positioned between the discs so that a circumferential portion of each roller extends beyond the circumference of the discs. The assembly also includes a wall member which is positioned adjacent the rotary member and has an interior wall surface which extends from a peripheral flanged wall edge and which is positioned and configured so that a channel is provided between the interior surface and the rotary member at a position between the discs for passage of the rollers and so that the flanged wall edge extends, with respect to a circumference of the rotary member, as an arc for a distance at least as great as a distance between two adjacent additional shafts.

Abstract: A pump, submerged in a fluid in a pump or well, has a buoyant outer, enclosing casing. Communicated to the casing are a conduit to supplying compressed air to the casing, a conduit for carrying the exhausted air away from the casing, an inlet and check valve for permitting entry of fluid into the casing, and an outlet and a check valve connected to discharge piping for carrying fluid away from the casing. The outer casing slides vertically relative to the discharge piping and is supported by the discharge piping for vertical movement between upper and lower stops where the casing actuates an air exhaust valve and a compressed air inlet valve. When the buoyant casing is in the upper position, air within the casing can escape through the open chamber air exhaust valve and compressed air entry is blocked to the casing through the closed compressed air inlet valve.

Abstract: A roller pump for medical technology, in particular for pumping blood in extracorporeal circulations. The roller pump has a stator (1) with a cylindrical hollow space (2), the wall structure of which is formed as a support wall (3) for a pump tube (5) led along this wall about the central longitudinal axis of the hollow space. A pump rotor is rotatably arranged about its central longitudinal axis (4) in the pump stator, the rotor having rollers (8) which are rotatably supported on roller supports (7) and roll along the tube upon rotation of the rotor and compress the tube. The support wall (3) of the pump stator has an opening (6) with an inlet region (10) and an outlet region (12) for the tube (5) and, in these regions, this support wall deviates from the circular path of motion of the pump rollers (8) at a differing curvature along the direction as this path of motion.

Abstract: A combined cycle power generation system incorporates a carbonizer and a pressurized fluidized bed reactor for the generation of fuel gas and flue gases, respectively. A combustor is provided for the combustion of the fuel gas in the presence of the flue gases to produce hot gases. The hot gases are passed through a gas turbine where the gases expand and cool while performing work in the generation of electrical power. The exhaust gases from the gas turbine are passed though a heat recovery unit for the production of steam. The exhaust gases are then combined with air and passed to the pressurized fluidized bed reactor to provide excess secondary gas to aid in driving the gas turbine.

Abstract: A universal automotive air conditioning compressor assembly with interchangeable mounting rings and suction and discharge manifolds. The compressor includes a universal casing body which will substitute for a large variety of original equipment compressors. The casing has grooves which removably receive interchangeable mounting rings. Various configurations of mounting rings are provided to match original equipment specifications for a wide variety of vehicle makes. The assembly also may include suction and discharge manifolds which are also interchangeable and which adapt the universal compressor unit to the particular suction and discharge hoses, eg., V-style or pad-style, in the original air conditioning system. Thus, by selecting the appropriate mounting rings and manifold style, a universal compressor is adapted for installation in a specific make and model of automotive air conditioning system.

Abstract: A fluid pumping system comprises a reciprocable pump having a reciprocable member. A valving system controls the supply of fluid under pressure to the reciprocable member to bring about reciprocation of the member. In order to provide a much more compact unit, the valving system is arranged to be offset radially from the reciprocable member, yet is drivingly connected to the reciprocable member through a unique mechanism so that the valving system may switch states responsive to the stroke travel of the reciprocable member.

Abstract: A fluid pump with a rotary impeller is disclosed which comprises an electromagnetically-driven, bearing-free, seal-free rotary impeller levitated by localized opposed, magnetic forces and by fluid forces, or by localized opposed magnetic forces only. Levitation by localized opposed magnetic forces alone or by a combination of magnetic and fluid forces of an impeller driven by electromagnetic forces eliminates the need for bearings and seals in the driving mechanism. This avoids the heat build-up and leakage associated with other pumping mechanisms, which can be of importance in pumping of physiological fluids such as blood. The levitating forces of the present invention are applied both axially and radially with respect to the impeller. The magnetic forces are provided by a combination of diamagnets or solenoids, opposed by permanent magnets, solenoids or electromagnets.

Abstract: There is disclosed a peristaltic pump which comprises a flexible tube for the passage of a fluid having an inlet and an outlet and a roller assembly comprising a number of rollers and a rotatable support, the rollers being mounted on and extending substantially perpendicularly outward from the rotatable support and the tube being stretched over the roller assembly so that it extends substantially perpendicularly to the rollers and through substantially 360.degree. around the roller assembly and where the tube contacts a roller it is compressed against that roller, the arrangement being such that in use where the tube is compressed against a roller it is occluded and rotation of the roller assembly causes each roller to contact and thereby occlude successive parts of the tube forcing fluid contained in the tube and trapped between the occlusions to be moved along the tube from the inlet towards the outlet.

Abstract: A water turbine (1) comprises a turbine chamber (3), an inlet port (4) and an outlet port (6) opening into the chamber (3), and two or more rotors (11, 12) arranged within the chamber (3) with their axes of rotation parallel so as to be rotatable in the water flow passing between the inlet port (4) and the outlet port (6). Each of the rotors (11, 12) has two or more substantially equi-angularly distributed lobes (17, 18), and the arrangement is such that the rotors (11, 12) rotate in opposite directions with their lobes in mesh with one another under the action of water impinging on the lobes of the rotors. Such a turbine can be constructed to operate efficiently with a low head of water, and is additionally of simple construction and therefore inexpensive to produce.

Abstract: A pilot control relay valve to change the directional flow of fluid to a piston (such as, for example, the piston of a chemical injection pump for injecting chemicals at a slow or rapid rate over a long period of time), but also allow the recovery of exhaust fluids under significant back pressure. The pilot control relay valve comprises an elongated valve member shiftable within a valve body between a first and second position. The first position allows communication of control fluid to a first pressure receiving surface while allowing exhausting of fluid from a third or opposing pressure receiving surface, thereby to initiate movement of the valve member against the back pressure of the exhaust fluid from its first position to a position equalizing the pressure acting on a second pressure receiving surface with the pressure of the control fluid, thereby causing the valve member to move to its second position.

Abstract: An improved peristaltic pump using a pumptube comprising an inner tube and an outer tube each of rigid fluoroplastic material, preferably polytetrafluoroethylene (PTFE), is provided. The pumping section of the pumptube which contacts the pressure rollers of the peristaltic pump is preformed or shaped into a flattened, oval-like shape which approximately conforms to the pumptube passageway in the peristaltic pump. The pressure rollers contact and compress the flattened side of the pumptube and, thereby, effect the transport or pumping of the fluid. Methods for preparing the pumptubes of this invention are also provided. Corrosive, hot, and/or high pressure fluids can be readily handled using the improved pumptubes and peristaltic pumps provided.

Abstract: Large work vehicles include hydraulic implement control systems having an hydraulic pump being driven by an internal combustion engine. The subject invention provides a method and apparatus for controlling such an hydraulic system to control engine lug while the hydraulic system is operating. The apparatus includes one or more sensors for producing parameter signals in response to the level of one or more hydraulic system operating parameters. A control receives the parameter signals and responsively produces a supplemental control signal which is used to control engine lug.

Abstract: A sectorized tubular structure able to resist implosion pressures, especially at the links between annular sectors. The tubular structure includes annular sectors interconnected by flat linking elements, each including at its ends at least one projection whose end enables the annular sectors to be supported. Thus, each linking element ensures the transmission of forces from one annular element to another. The unit is supported by fixing screws which are never in contact with the two annular sectors to be kept assembled.

Abstract: Pump heads comprising at least two gear-pump chambers are disclosed. Each chamber comprises a housing which defines a corresponding pump cavity. Each cavity contains a driving gear and at least one driven gear and has a separate inlet and outlet. The pump cavities are hydraulically interconnected by a fluid conduit allowing passage whenever the pump chambers are pumping a fluid so as to generate a higher pressure in one cavity relative to the other cavity, of the fluid from the higher-pressure cavity to the lower-pressure cavity sufficient to maintain hydraulic prime of both cavities.

Abstract: A swash plate pump is particularly adapted for use as a helm pump for controlling a tiller of a marine vessel and has a rotor mounted within a pump housing. The rotor is rotatable by a wheel about a housing axis and has a plurality of cylinders therein disposed circumferentially around the rotor. A piston is resiliently mounted in each cylinder for reciprocal movement along a respective cylinder axis so that outer ends of the pistons engage a swash plate inclined obliquely to the housing axis at a fixed swash plate angle. Bleed conduits are provided in the outer ends of each piston, each bleed conduit having an opening disposed on the respective cylinder axis. The outer end of each piston is shaped to provide access to the bleed conduit between the bearing plate and the outer end of the piston, preferably by having a truncated conical end wall inclined at an end face angle equal to the swash plate angle to provide line contact between the end wall and the swash plate.

Abstract: Apparatus defining an expansible/contractible chamber includes a housing having a first housing portion and a second housing portion. A rotor rotates within the first housing portion in one direction while a block rotates in the second housing portion in an opposite direction. A vane disposed on the rotor registers with a recess in the block and defines with the block the chamber. The apparatus can function as an engine, a turbine, a pump, a compressor, or a vacuum pump. An associated method includes the steps of introducing a fluid into the chamber, rotating the rotor and associated vane in order to vary the volume of the chamber and performing work relative to the fluid in the chamber.

Abstract: A device is provided for switching a submersible motor-driven pump on and off by a pressure sensor which measures the level of the liquid in the chamber enclosing the submersible motor-driven pump by the liquid pressure in the chamber, the pressure sensor being attached in or on the outside of the motor or pump casing and having a pressure-sensitive ohmic resistance.