Abstract: According to a scroll compressor of the present invention, lubricant is supplied to a compression chamber in the proportions of 2% by weight or more and less than 20% by weight of the lubricant to the sucked refrigerant amount. With this, it is possible to provide an efficient scroll compressor even when carbon dioxide is used as the refrigerant.

Abstract: A multi-stage compression type rotary compressor 10 is provided with an electrical-power element 14, the first and second rotary compression elements 32, 34 driven by a rotary shaft 16 of the electrical-power element 14 in a sealed vessel 12. The refrigerant compressed by the first rotary compression element 32 is compressed by the second rotary compression element 34. The refrigerant is combustible. The refrigerant compressed by the first rotary compression element 32 is discharged to the sealed vessel 12. The discharged medium pressure refrigerant is compressed by the second rotary compression element 34. Additionally, the displacement volume ratio of the second rotary compression element 34 to the first rotary compression element 32 is set not less than 60% and not more than 90%. By using the multi-stage compression type rotary compressor, a rotary compressor using a combustible refrigerant can be carried out.

Abstract: This invention concerns pumping fluids to both high pressures and high flow rates and thus has a very high power density. The technology pertains to both fluid power and to fluid transfer and is adaptable to a wide scope of use. The concept is a very simple rotary variable displacement expansible chamber pump which can also be a rotary kinetic pump and thus is a hybrid. At a positive displacement setting, the pump primes by positive displacement, then as the rotational speed increases; the pump gains a kinetic pumping component, then as head pressure increases the pump again becomes positive displacement. At a zero displacement setting, the pump is purely a rotary kinetic pump. The variable displacement feature allows both performance and efficiency. The porting allows very high rotational speeds and flow rates near to centrifugal designs. When set at zero displacement, the device has features both of positive displacement fan (gear pump) and kinetic (centrifugal pump). The pump is vibration free and silent.

Abstract: A pump for conveying molten masses of polymers and/or elastomers comprising a pump body in which are formed an inlet duct for entry of the material, an outlet duct for discharge of the material and a central body communicating with the inlet and outlet ducts and destined to house at least one gear mounted on a motorized shaft for conveying the material from the inlet duct toward the outlet duct. The pump body consists of two parts that can be assembled together, each part of the pump body comprising at least one through hole communicating with the central chamber, so that said at least one shaft of the gear is rotatably supported directly in the pair of opposite facing holes of the two parts of the pump body.

Abstract: Disclosed is a gas compressor capable of preventing generation of noise due to the vibration during the rotation of the rotor. A rotor rotating in a cylinder around a rotation shaft has five radially extending vane grooves, each of which supports a vane. The respective directions of the vane grooves are determined such that the respective angular differences between at least three adjacent compression chambers are not less than 5 degrees. Thus, the angular intervals in terms of direction between the vanes supported by the vane grooves are also different from each other. As a result, the timing with which the vanes pass the outlet port is irregular, and the discharge period is thus unequal between a plurality of compression chambers, whereby the periodicity of the vibration based thereon is reduced, and the peak values of the basic vibration component are reduced.

Abstract: A compressor has male and female rotors with enmeshed screw-type body portions. A housing cooperates with the rotors to define inlet and outlet chambers for pumping of fluid from/to when the male rotor in a first direction and the female rotor rotates in an opposite direction. The housing cooperates with the rotors to define inlet and outlet ports at the inlet and outlet chambers for each of a male and female compression pocket. The inlet ports and/or outlet ports of the respective male and female compression pockets are positioned to respectively close or open sequentially.

Abstract: A scroll compressor has a biasing chamber which contains a pressurized fluid. The pressurized fluid within the chamber biases the two scroll members together. A valve assembly is in communication with this biasing chamber and releases the pressurized fluid on demand to remove the load, biasing the two scroll members together. When the biasing load is removed, the two scroll members separate, creating a leakage path between discharge and suction to reduce the capacity of the scroll compressor.

Abstract: The invention relates to a pump with a pump chamber with a rotary-driven pump element mounted, at least one suction and at least one pressure connection opening into the pump chamber and with circulating pumping cells whose volume can be changed, which are connected with the suction or pressure connection depending on the rotary position of the pump element. A hydraulic intermediate capacity is provided that can be stressed with the pumping medium pressure present at the pressure connection by way of its first connection and that, by way of its second connection, can be stressed with the pumping medium pressure present at the pressure connection depending on the rotary position of the pump element or it can be connected with a pumping cell that has no direct connection to the pressure connection.

Abstract: The invention relates to a method and a device for distributing liquid media, in particular extinguishing fluids for fighting fires, in the form of a mist or a stream of large droplets from a supply line which is maintained at a constant low-pressure, in rooms, for example in living spaces and recreation rooms, or similar. The aim of the invention is to provide a method and a device of the aforementioned type which can be used to produce a fine mist of small droplets and a jet spray of large droplets at separate moments, at approximately the same operating pressure of the extinguishing fluid, depending on the outbreak and the development of the fire, whilst at the same time minimising water consumption, reducing water damage caused during a fire and increasing cost-effectiveness, by creating a modular system which can be universally installed.

Abstract: A lawn mower fluid dispenser includes a fluid dispensing device for a riding lawn mower having a front end and a rear end. A blade cover is positioned generally between the front and rear ends. The device includes a container having a bottom wall, a top wall and a peripheral wall. An indicator for determining an amount of fluid positioned within the container is fluidly coupled to the container. A mounting assembly removably supports the container on the rear end of the lawn mower. An elongated hose has a first end and a second end. The first end is fluidly coupled to the container. A nozzle is fluidly coupled to the second end. The nozzle is removably extendable through an aperture in the blade cover. A fluid may be positioned in the container such that the fluid is dispensed through the nozzle.

Abstract: Second stage turbine buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth Table 1 wherein X and Y values are in inches and the Z values are non-dimensional values from 0.088 to 0.92 convertible to Z distances in inches by multiplying the Z values by the height of the airfoil in inches. The X and Y values are distances which, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z. The profile sections at each distance Z are joined smoothly to one another to form a complete airfoil shape. The X and Y distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section for the bucket. The nominal airfoil given by the X, Y and Z distances lies within an envelop of ±0.160 inches in directions normal to the surface of the airfoil.

Abstract: Inner peripheral projections are provided on the inner peripheral surface of a wrap portion of an orbiting scroll member, and outer peripheral projections are provided on the outer peripheral surface of the wrap portion. The inner and outer peripheral projections each have an approximately triangular transverse sectional configuration defined by a narrow top of the projection and a pair of concavely arcuate surfaces extending with a wide overall width so that the projections can prevent stress concentration with the concavely arcuate surfaces to increase the mechanical strength and can be readily machined by using a tool, e.g. an end mill. When contacting the mating wrap portion, the narrow tops of the projections are readily crushed or worn. Therefore, the tops of the projections can become fit to the wrap portion without strongly contacting it many times.

Abstract: The invention relates to a feed pump for fluidic media, comprising a displacement body that is mounted in a pump housing and equipped with slide bearings and connecting channels that connect the slide bearings to the produce channel on the suction side for recirculating the fed medium that lubricates the slide bearings. The connecting channels are linked to control channels that lead to the exterior and guide channels are provided in the extension of the connecting channels in the housing of the cover. Said guide channels accommodate the valve plungers, each of which has a constriction. The section of the valve plunger lying adjacent to the product channel has a length and a diameter, which correspond to the length and diameter of the connecting channel.

Abstract: A rotary machine including a housing with spaced apart end walls defining a chamber. A two-lobe lenticular rotor assembly is disposed in the chamber for eccentric rotation therein. A hole passes through a central portion of the rotor assembly. Slots are cut in one end of the rotor assembly about the center of the rotor assembly. A rotor guide assembly includes generally cylindrical guideposts which extend parallel toward the slots and engage in eccentric rotation of the slots. A shaft extends through the center of the hole. In one embodiment an even number of six or more spaced slots and half that number of guideposts spaced around the shaft are used which allows for a larger sized hole and shaft. In another embodiment, four slots which are shifted toward the apices of the rotor, and two guideposts are used, which also allows for a larger sized hole and shaft.

Abstract: A variable capacity rotary compressor, which precisely controls variation of a compression capability into a desired discharge pressure, and which minimizes a resistance to rotation of a rotating shaft, and thus improves the capacity of the rotary compressor.

Abstract: An improvement of a ring for a scroll compressor by forming a gap at an angle on the top of the ring where is less subject to pressure, and an askew tangent plane descending outwardly from the bottom of the gap to allow the lubricant passing through the gap and flowing along the askew plane into the spacing between the ring and the circulating scroll to maintain consistent lubrication among the ring, the eccentric rod and the circulating scroll when the ring floats up to the top to hold against the body of the circulating scroll.

Abstract: A hydraulic device for one of a motor and pump, having a manifold assembly positioned between a gerotor set and a housing for the device, the manifold assembly adapted for conducting pressurized fluid to the gerotor set and conducting exhaust fluid from the gerotor set. The manifold assembly having a first axial end, a second axial end, a central internal bore extending freely from the first axial end to the second axial end and adapted for conducting at least a portion of one of the fluids, a first fluid passage extending directly from the central internal bore to a location radially outward from the central internal bore and therefrom to the second axial end, and a second fluid passage extending substantially laterally from the second axial end to the first axial end.

Abstract: A rotary vane pump has an open ended pump cylinder mounting a drive motor at one end and a ported end plate and sound chamber at the other end. The cylinder contains a rotor mounted to an eccentric drive shaft and having vane grooves receiving slidable vanes contacting an inner diameter of the cylinder. The end plate has an outlet port and primary and secondary inlet ports in communication with the cylinder interior, the inlet ports being in communication with an area of net expansion. The sound chamber has an intake port and an exhaust port in communication with the respective outlet and primary and secondary inlet ports of the end plate. The sound chamber is partitioned to define a number of internal cavities through which the incoming air is routed to the secondary inlet port.

Abstract: A screw compressor includes a housing having a discharge port; at least two rotors rotatably disposed in the housing for generating opposed discharge flows in radial and axial directions; and a tangential flow guide cusp disposed in the discharge port and at least partially defining a radial flow portion of the discharge port and having flow guiding surfaces arranged to guide tangential flows from said rotors so as to provide at least one of radial and axial directed flows.

Abstract: A scroll type compressor has a housing, a fixed metal scroll member and a movable metal scroll member. The fixed and the movable scroll members each have a base plate and scroll wall extending therefrom. The fixed scroll member is fixed to the housing. The movable scroll member engages the fixed scroll member to trace an orbital motion when driven by a crank mechanism. The scroll members define compression chambers. Resin tip seals are respectively provided on distal ends of the scroll walls and slidably engage the metallic surfaces of the facing base plates. The tip seals seal the compression chambers. A resin coating layer is formed on a region of at least one of the end surfaces of the base plates that is not contacted by a tip seal.