Abstract: A discharge valve of a hermetic compressor includes a valve plate disposed on a cylinder head that draws in and discharges refrigerant according to reciprocal movement of a piston, and the discharge valve having a discharge hole formed therein through which refrigerant is discharged, a disc valve disposed adjacent the discharge hole of the valve plate, the disc valve being raised or lowered by the reciprocal movement of the piston and disc valve weight, and a stopper disposed above the disc valve, for guiding the raising and lowering of the disc valve and also for limiting the height to which the disc valve may be raised. The compressor is not subject to overload or over pressurization that may otherwise result from an elastic closing force operating in the valve, and as a result, compression efficiency is increased, while noise is decreased.

Abstract: A crossfire tube assembly with telescoping inner and outer crossfire tubes with an enhanced cooling mechanism for connecting adjacent combustors in a gas turbine is disclosed. The enhanced cooling configuration includes a plurality of channels formed in the telescoping region of the inner and outer crossfire tubes of the assembly to improve heat transfer and reduce local operating temperatures such that component life is extended.

Abstract: Insulation for a rocket motor is provided, as is a method for insulating a rocket motor. The insulation includes a cured elastomer and vapor-grown carbon fibers dispersed in the cured elastomer. The cured elastomer is preferably formed from a precursor composition comprising an EPDM terpolymer. Generally, the vapor-grown carbon fibers have an internal graphitized tube surrounded by a sheath of vapor-deposited amorphous carbon.

Abstract: A catheter and a method for using the catheter for site specific delivery of agents to or collecting agents from biological spaces. The catheter includes an inner shaft longitudinally movable within an outer shaft, each shaft having at least one balloon and at least one lumen formed therein. The catheter prevents leaking through a biological membrane by sealing the catheter tip passageway through the biological membrane with inflatable balloons on either side of the biological membrane. Further, the inflated balloons secure the position of the catheter relative to the biological membrane and the biological space targeted for therapy or diagnosis.

Abstract: A method of discharging a fluid, includes feeding a fluid into a gap defined between two surfaces in a closed space, and relatively oscillating the two surfaces to apply relative oscillation with high frequency to the gap so as to occur a squeeze pressure to the gap, and thus intermittently discharging the fed fluid through a discharge port provided in either one of the two surfaces by using the squeeze pressure.

Abstract: A rotary device containing a housing having a curved inner surface with a profile equidistant form a trochoidal curve, an eccentric mounted on a shaft disposed within the housing, a rotor mounted on the eccentric shaft which contains at least three sides, a partial bore located at the intersection of adjacent sides, and at least three rollers rotatably mounted within the partial bores of the roller. The rotor is comprised of a front face, a back face, a first side, a second side, and a third side. On each front and back face, between adjacent sides, an opening is formed. The openings are on opposing front and back faces are offset from a centerline of the rotary device.

Abstract: A multistage compressor assembly containing at least two guided rotor compressor stages, each of which contains an eccentric mounted on a shaft located within a housing, a rotor mounted on the eccentric shaft which contains at least three intersecting faces, a partial bore located at the intersection of adjacent faces, and at least three rollers rotatably mounted within the partial bores of the rotor.

Abstract: A cowl for use with a combustor of a gas turbine engine, the cowl includes a main body with an annular corrugation. A combustor of a gas turbine engine, the combustor includes: a hollow body defining a combustion chamber, the hollow body having a liner; an outer cowl having an annular corrugation, the cowl connecting to the liner; and an inner cowl connecting to the liner. A method of configuring a cowl for a gas turbine engine combustor, the method includes forming an annular corrugation in a main body of the cowl.

Abstract: A pump assembly for mounting a high-pressure oil pump on an internal combustion engine where the pump in the assembly is mounted in a closed chamber and a solenoid controlled valve is mounted outside of the chamber.

Abstract: A combined cycle system includes a gas turbine (8) having a generator (1), a compressor (2), a combustor (3), a blade cooling air cooler (4), a fan (5), and a turbine (6); a steam turbine (29) having a high pressure turbine (21), an intermediate pressure turbine (22), and a low pressure turbine (23); and a waste heat recovery boiler (9). Saturated water from a high pressure pump (27) is partially led into a heat exchanger (110) for cooling steam to be supplied into a moving blade (52) and a stationary blade (53). Also, outlet steam from the high pressure turbine (21) is led into the moving blade (52), the stationary blade (53), and the combustor transition piece (54) for cooling thereof, and the steam is then supplied to an inlet of the intermediate pressure turbine (22). Further, the outlet steam from the high pressure turbine (21) is led into the turbine (6) for cooling blades thereof.

Abstract: A system and method of combusting a hydrocarbon fuel is disclosed. The system combines the accuracy and controllability of an air staging system with the ultra-low emissions achieved by catalytic combustion systems without the need for a pre-heater. The result is a system and method that is mechanically simple and offers ultra-low emissions over a wide range of power levels, fuel properties and ambient operating conditions.

Abstract: A manifold assembly is provided for controlling and distributing compressed air from an air compressor to one or more air powered tools. The manifold assembly may be attached directly to the air compressor, or, alternately, removed from the air compressor and coupled thereto via an air conduit, e.g., an air hose or the like, so that the manifold assembly can be used at locations remote from the air compressor.

Abstract: The radial piston pump possesses a pump housing in which a plurality of cylinder bores are provided having pump pistons placed therein which can be driven by a cam. Further, an arrangement is provided in each pump piston (3) wherein the inlet or the outlet, or both the inlet as well as the outlet of the fluid in each cylinder bore, is controlled.

Abstract: A fluid flow system for a gas turbine engine provides combustion fuel to a main pump and an actuator pump significantly reducing heat generation at low flow demand, while regulating actuator flow temperature at high flow demand. Fuel flow from the actuator pump in excess of the actuators needs is directed through an actuator minimum pressure valve and into a thermal bypass valve (TBV.) Depending upon the temperature of the fuel, the TBV determines the path of the excess actuator pump fluid flow. The TBV divides the fuel flow between being recirculated to the actuator pump inlet and the main pump output flow path to the engine fuel input conduit. The engine actuators are thereby assured of receiving flow which preclude freezing of water entrained in the fuel. When there is minimal concern with the possibility of freezing water entrained in the fuel, the TBV passes a greater percentage of fuel through to join together in the engine fuel input conduit.

Abstract: A method for telemetrically measuring a parameter in a patient's heart comprises the steps of imaging the heart and identifying an implantation site in the heart. An opening is created in the tissue at the implantation site. A sensor comprising a housing, a membrane at one end of the housing wherein the membrane is deformable in response to the parameter, and a microchip positioned within the housing and operatively communicating with the membrane for transmitting a signal indicative of the parameter is provided. The sensor is placed in the opening and the parameter is telemetrically measured from outside of the patient's body based on the transmitted signal by the sensor. The sensor is also telemetrically powered from outside of the patient's body. A signal charging and reading device is placed outside of the patient's body for telemetric powering and signal reading with respect to the sensor.

Abstract: An integrated brushless DC wet motor pump unit comprises a pump, a motor and a motor controller all contained within a housing. The motor includes a stator having stator coils fixed in relation to the housing and a motor rotor surrounding the stator coils and supported for rotation in the housing. A drive coupling drivingly couples the motor rotor to a rotating pump element, and the drive coupling, rotating pump element and motor stator are radially supported on a central support member. The various motor and pump components are assembled into the housing from one axial end of the housing, with the motor rotor, drive coupling and rotating pump element having axially telescoping anti-rotation elements connecting the same for common rotation. The motor rotor includes a radially outer back-iron and a rotor magnet that is insert molded into the rotor back-iron that is rotatably supported at its outer diameter by a journal surface on an inner diameter surface of the housing.

Abstract: The invention relates to a method and compressor module for compressing a gas stream of entry temperature t1 with the aid of hydraulically driven piston compressors in two compression stages of an entry pressure p1 from an intermediate pressure p2 after the first compression stage and from intermediate pressure p2 to an exit pressure p3 after the second compression stage, whereby the gas stream compressed to the intermediate pressure p2 is cooled back down to the entry temperature t1 before entering the second compression stage, and identical pressure ratios p3/p2=p2/p1 are used in the compression stage. According to the invention, the pressure ratios are adjusted by correspondingly adapting a hydraulic fluid stream for driving the first compression stage and a hydraulic fluid stream for driving the second compression stage with regard to the flow rate thereof with the aid of two adjustable hydraulic fluid pumps.

Abstract: In a turbine engine, low temperature air is diverted from a low pressure section of the compressor section of the engine to cool the high pressure turbine of the engine. Low pressure air is diverted from the compressor section, and its pressure is thereafter increased. Preferably, the pressure is increased in an intermediate cavity in the engine, where rotational energy of the diverted air is converted to static pressure by way of an obstruction that converts dynamic head of the air in the cavity into static pressure.

Abstract: A method for determining whether a centrifugal pump is degraded as operating outside of acceptable operating limits and includes the steps of determining a motor torque/TDH relationship over a range of speeds for minimum and maximum flow rates and at least at two other intermediate flow rates, sensing and measuring at least another pump value selected from a differential pressure across the pump, a pump discharge pressure or pump flow, to provide an output pump value and comparing said value with said determined relationship values to provide an indication as to whether said pump has degraded.

Abstract: A fuel injector has a metering valve arranged to open under a predetermined feed pressure which constitutes a first threshold pressure, and to remain open in response to said feed pressure increasing so as to deliver fuel to fuel utilization means. The flow rate of fuel passing through the injector is metered to feed said utilization means so long as the feed pressure remains below a second threshold pressure greater than the first threshold pressure. Above the second threshold pressure, the metering valve behaves like a fixed diaphragm as a function of the fluid flow sections formed therethrough. Individual adjustment means are provided so as to enable said second threshold pressure to be adjusted for each injector to ensure that fuel is injected at a uniform flow rate by all of the injectors in a combustion chamber.