Abstract: A central impeller is sandwiched between fixed walls and is driven through a circular path of small radius, but prevented from rotating by a ring-shaped shutter or slider which surrounds and guides it. The shape of the impeller and slider are such that displacement chambers are formed between them, which expand and contract as the impeller follows a circular path and imparts a reciprocating motion to the slider. The two fixed walls contain suction and discharge ports which are covered and uncovered by the impeller and the slider as they perform their motions.

Abstract: A thrust reverser for a turbofan-type turbojet engine in which the axial length of the fan housing is less than that of the turbojet engine cowling such that the movable thrust reverser baffles may be attached to the jet engine cowling and moved to an extended position wherein the cold flow gases emanating from the cold flow exhaust duct are redirected to provide a thrust reversing force. The baffles are movably attached to the engine cowling by a plurality of linkrods forming a deformable parallelogram kinematic linkage. Each of the linkrods has opposite ends pivotally attached to the movable baffle and to the engine cowling, respectively.

Abstract: A gas turbine engine (10) includes a translating sleeve (38) disposed within a downstream portion of an outer nacelle (20). A variable area fan exhaust nozzle (30) is defined between the trailing edge (32) of the translating sleeve (38) and a conical core cowl (26) disposed radially inwardly of the outer nacelle (20) and spaced apart therefrom. The translating sleeve (38) translates downstream to cooperate with the decreasing diameter of the core cowl (26) to increase the area of the fan exhaust nozzle (30).

Abstract: Disclosed herein is a fuel pump comprising a housing including therein a high pressure fuel chamber, a fuel outlet valve communicating with the high pressure fuel chamber and being operable to prevent fuel inflow and to permit fuel outflow when the fuel pressure is above a predetermined level, a fuel inlet valve communicating with the high pressure chamber and being operable to prevent fuel outflow and to permit fuel inflow, and a bearing bore extending from the high pressure chamber, a rod slideably and sealingly supported in the bearing bore for movement relative to a retracted position, and structure located in the housing for displacing the rod from the retracted position and in the direction toward the high pressure fuel chamber through an initial stroke length without encountering substantial resistance and thereafter displacing the rod through a subsequent stroke length which is effective to highly pressurize the fuel in the high pressure fuel chamber.

Abstract: A hermetic type compressor which makes opening and closing of a exhaust valve installed inside a reentrant groove formed in a cylinder head smooth, and prevents leakage of refrigerant from the exhaust valve by fabricating a valve seat surface to be in the same height as that of a valve fixing surface.

Abstract: A bypass air valve is provided comprising a liner, a strap, and apparatus for selectively actuating the valve. The liner includes an inner surface, an outer surface, a plurality of first regions, and a plurality of second regions. Each first region includes a plurality of first apertures. The strap includes a plurality of openings and a plurality of third regions. The third regions include a plurality of second apertures. The valve may be selectively actuated into an open position where the first regions are in communication with the openings, and the third regions are in communication with the second regions. The valve may be selectively actuated into a closed position where the first regions are in communication with the third regions, and the second regions are in communication with the openings.

Abstract: A method for suppressing noise in a turbofan engine includes segmenting coaxial inner and outer flow streams into circumferentially interleaved inner and outer segments beginning at a common location along the engine axis, diverting additional portions of the outer stream radially inwardly from an axial location downstream of the common location and combining the inner segments, the outer segments and the additional portions into a common stream so that the additional portions are introduced into discrete radial locations in the common stream. The diverted additional portions of the outer stream eliminate localized regions of hot, high velocity gases in the combined stream to achieve improved noise suppression.

Abstract: An electric submersible motor-driven pump includes a pump housing (2) in which is located a pump motor (3) and an associated impeller (4). A separate detachable float and switch housing (6) is detachably connected to the pump housing (2) and defines a substantially elongated upright chamber having a longitudinal axis in which an elongated float (8) moves for operating a switch arm of a switch whose electrical components are isolated from the fluid being pumped. A switchable adapter plug exteriorly of the housings is rendered operative by the electrical components upon movement of the float (8) to selectively energize or de-energize the pump motor (3).

Abstract: A highly manufacturable gas compressor includes a sheath removably attached to a piston by several resilient fingers that snap into place at the bottom of the piston. The fingers act to limit relative motion between the piston and sheath as the piston is reciprocated within a cylinder bore. During the suction stroke of the compressor, the piston and sheath separate at their tops, creating an opening at the top of the sheath which allows low pressure gas to flow through an opening formed in the side of the sheath, between the sheath and piston, through the opening at the top of the sheath, and into a compression chamber formed between the top surfaces of the piston and sheath and the bottom surface of a discharge valve.

Abstract: The present invention discloses a modular diaphragm cartridge for use with a pump assembly. A cartridge body defines an interior chamber into which a piston is slidably connected. A spring biases the piston against a diaphragm placed over the end of the cartridge body to enclose the interior chamber. An end cap which threadedly engages the cartridge body to enclose the diaphragm between the end cap and body. The modular diaphragm cartridge may be removed from a pump housing as a single unit without the need for keeping track of multiple pieces. The present invention further discloses a modular inlet valve assembly, outlet valve assembly and plunger seal/guide cartridge.

Abstract: An advance mechanism for a pump comprises a fluid operable piston arranged to have pressurized fluid applied to a first end thereof to adjust the axial position of the piston. The arrangement further comprises means for applying fluid under pressure to a part of the piston remote from the first end thereof in order to apply a torque to the piston. In one embodiment, the means for applying comprises a passage extending within the piston, the passage communicating with the first end of the piston such that high pressure fluid is received by the passage.

Abstract: A combustion chamber, particularly for a turbomachine, has at least one generally axially extending wall provided with a plurality of through holes defining a multi-hole cooling system for the wall. The wall also has a plurality of dilution holes which affect locally the flow of burnt gases in the chamber, and the cooling through holes are oriented according to the local flow of burnt gases in the chamber. In particular the wall is subdivided into first zones, downstream of the dilution holes, in which the through holes are oriented substantially in countercurrent to the overall flow direction of the burnt gases in the chamber, second zones and third zones which are disposed on opposite sides of the first zones and in which the orientation of the through holes is inclined both axially and circumferentially, and a fourth zone covering the remainder of the wall and in which the through holes are inclined axially in the overall flow direction of the burnt gases.

Abstract: A hermetically sealed reciprocating refrigeration compressor has a suction gas arrangement including a suction gas plenum formed integral with a cylinder block for supplying suction gas directly to a cylinder so as to eliminate the need for external suction gas conduits. Apertures are formed about the circumference of the cylinder for receiving suction gas directly from the suction gas plenum. Pistons are provided with multiple suction gas entrances and a semi-toroidal suction valve to provide an efficient way of introducing suction gas into a compression chamber during a suction stroke of the compressor. A spherical discharge valve assembly is provided in a valve plate adjacent the compression chamber for improved flow characteristics and increased through flow area.

Abstract: A valve disabler for use in high pressure pipe cleaning systems. The valve disabler of the present invention serves to disable a single cylinder in a multi-cylinder plunger pump so as to generate pulsatile pressure surges within a hose member. The pulsatile pressure surges cause the distal end of the hose member to move in a serpentine manner, thus allowing the hose member to negotiate down a tortuous path within the pipe without stalling or becoming otherwise impeded.

Abstract: A control system 10 for monitoring operation of a high pressure plunger pump 12 includes a microprocessor-based controller 40 and a plurality of sensors. Inlet pressure transducers 48 output electrical signals to the controller at intervals of less than 1 millisecond, indicative of the instantaneous inlet pressure to the pump. The controller 40 shuts down pump operation if a number of instantaneous pressure signals within a selected time period exceeds a predetermined value, or if the average inlet pressure signal exceeds a preselected value. The control system 10 is substantially tamperproof, and stored data indicative of tampering, pump startup, pump shutdown, and pump alarm conditions are recorded in a memory for subsequent retrieval and analysis. The serial interface 82 allows communication between the system operating computer 68 and a setup/processing computer 84, which may optionally be remote from the control system by use of a modem.

Abstract: A power unit housing a pump, comprising: a hydraulic oil tank having an approximately L-shaped configuration and including a pump housing portion which houses a hydraulic pump and an oil reservoir portion which is integrally formed with and arranged approximately perpendicular to the pump housing portion; an electric motor juxtaposed alongside the oil reservoir portion, the electrical motor operating the hydraulic pump through a direct coupling; and a switching valve for switching the supply and discharge flow of the hydraulic oil between the hydraulic pump and an external load, the switching valve is positioned in proximity to the electric motor. According to this arrangement it is possible to shorten the axial length of the hydraulic oil tank while maintaining the volume of the tank and it is possible to make the entire unit compact.

Abstract: An infusion system having a pumping mechanism with tube-engaging members for pumping fluid through a tube, a releasable pressure plate that can be attached and detached from the pumping mechanism having a releasable attachment mechanism for attaching an infusion tube to the pressure plate such that the infusion tube can be engaged by the tube-engaging members when the pressure plate is attached to the pumping mechanism, and an infusion tube for delivering fluid from a fluid source to a patient that is arranged and configured to be attached to the pressure plate by the attachment mechanism and used with the pumping mechanism. The infusion tube can be quickly replaced by detaching the infusion tube from the releasable attachment mechanism and attaching a new infusion tube to the pressure plate.

Abstract: A pump chamber for compressing a liquid such as engine fuel is formed inside a bellows, and the liquid is aspirated into the pump chamber from a suction check valve when the bellows elongates. After the liquid in the pump chamber is pressurized by the contraction of the bellows, it is discharged from a discharge check valve. By providing a fill member for eliminating a dead space in the pump chamber, the formation of air bubbles in the pump chamber is suppressed.

Abstract: A reciprocating piston type compressor for compressing refrigerant gas includes a plurality of pistons slidably provided within cylinder bores for reciprocation. A pair of housings are mounted to the either ends of the cylinder block with valve plates therebetween. The housings include at least a refrigerant gas suction chamber which is fluidly connected to the cylinder bores. An oil sump is provided for containing lubricating oil. An oil pump is provided for distributing the lubricating oil to the compressor elements. The oil pump includes oil suction which is fluidly connected to the oil sump through a oil suction passage. The pressure in the refrigerant gas suction chamber is introduced into the oil suction chamber to direct the lubricating oil into the oil suction chamber from the oil sump during the initial stage of the starting of the compressor.

Abstract: A piston-type compressor is provided with a lubricating system for allowing passage of blowby gas from a piston chamber to a crank chamber, which is disposed opposite the piston from the piston chamber. A driving mechanism is disposed in the crank chamber and is coupled to the pistons to move the pistons in a reciprocating motion. The lubricating system may comprise at least one groove formed in an inner surface of at least one of the cylinders to allow passage of a fluid and a lubricating oil, via blowby gas, from the piston chamber to the crank chamber. The fluid may lubricate the moving parts of the driving mechanism.