Abstract: A shell for a hermetic compressor unit, the shell having a top section or dome, and a bottom section, the dome having a unique shape which gives enhanced capacity for absorbing and attenuating structural and fluid transmitted wave energies emanating from the unit at wave frequencies of between 1,000 Hz and 2,000 Hz, while reducing total operating noise of the unit, the dome being formed of sheet metal and having a generally inverted cup-shaped configuration with generally cylindrical sidewalls and a top wall having a central portion surrounded by a peripheral portion, wherein the sidewall taken in a generally axial direction is substantially straight, wherein the central portion of the top constitutes from about 40 to about 90% of the total area of the top and has a generally hemispherical configuration on a mean radius of from about 6.5 to about 10.0 inches as measured from an origin point O.sub.

Abstract: A variable capacity or displacement type pump by which a pump discharge quantity is variably controlled in accordance with the revolution number, which has simple construction to contributes easier machining and assembling, and is reliable in operation. A cam ring is movably arranged to define a pump chamber around a rotatable rotor within a pump body and is biased so that the volume of the pump chamber is made maximum. Sealing members are provided in an annular space between the cam ring and the pump body so as to define first and second hydraulic pressure chambers through which the cam ring is driven to move. A switch valve is provided to control the hydraulic pressure transmitted to the first and second chambers in accordance with the quantity of the flow discharged from the pump chamber.

Abstract: A variable displacement high pressure pump for pumping fluid at a high pressure to an accumulation chamber is disclosed including a low pressure supply pump for supplying fluid at a low pressure, a first high pressure pumping unit for receiving the low pressure fluid through an inlet and selectively delivering the supply fluid to the accumulation chamber at a high pressure greater than the low pressure, a second high pressure pumping unit for receiving the low pressure fluid through an inlet and selectively delivering the supplied fluid to the accumulation chamber at a pressure greater than the low pressure, a common fluid passage in fluid communication with each of the first and second high pressure pumping units for permitting the flow of fluid from one of the first and second high pressure pumping units to the other of the first and second high pressure pumping units and a pressure balanced valve positioned in the common fluid passage for selectively blocking the flow of fluid between the first and second

Abstract: A peristaltic pumping apparatus and associated method to control power to the pump rotor to establish, during a preestablished first time period, a selected first angular velocity and sequentially establishing during a preestablished second time period immediately following the first time period a second angular velocity different than the first angular velocity. In this fashion, the apparatus and method achieve flow rates well below the minimum continuous flow rate of the rotor.

Abstract: A housing for a power tool has an integral molded air channel or duct. The air channel surrounds the flywheel rotor of the power tool engine. The air channel is able to capture air pushed by the spinning flywheel rotor and direct the air directly towards the muffler of the engine. The air mixes with the exhaust gases from the muffler to reduce the temperature of the gases as they leave the housing.

Abstract: A squeeze pump has an elastic tube disposed between an inlet and an outlet of a cylindrical drum and extends along an inner peripheral surface of the drum. A pair of pressing rollers spaced by 180 degrees are arranged to press the tube. The tube is deformed into a flat shape with two bent portions to transfer a slurry within the tube. The tube has a large diameter in the inlet and a small diameter in the outlet. Each pressing roller has a large diameter formed at the middle and a small diameter at both ends. A support member extends along the inner peripheral surface of drum to support at least one of the bent portions of tube when the tube is pressed by the pressing roller.

Abstract: A hydrostatic drive system including an adjustable pump and a hydraulic fluid delivery line connecting the outlet of the pump to the inlet of a hydraulic energy consuming device. An adjustable throttle is located in the hydraulic fluid delivery line between the outlet of the pump and the inlet of the hydraulic energy consuming device. A load-sensing controller is connected to the hydraulic fluid delivery line on opposite sides of the throttle and is operatively connected to the pump to determine the displacement of the pump and to reproduce the pressure drop at the throttle. The load-sensing controller coordinates the pressure difference, .DELTA.p, and the size of the opening of the throttle in accordance with the set speed of movement of the hydraulic energy consuming device.

Abstract: A pump stand (1) has a base plate (2) for mounting thereon a pump (3) and at least one of a control unit (6) and a vacuum controller (7). The pump stand (1) has for this purpose a plurality of push-in or snap-in connections (5) enabling pump components or accessory units, particularly the pump (3) itself, to be simply exchanged. By this means a pump stand (1) of straightforward arrangement ensues, which provides a large number of possibilities for variation and can be simply combined with pumps of different type or different output.

Abstract: A hose fastening arrangement for roller pumps, especially for a heart-lung machine, which possesses a head constituted of a pump stator and pump rotor, including fastening devices for fastening of the pump piece which is inserted into the pump head of the roller pump. The hose fastening arrangement for roller pumps of the above-mentioned type is detachable from the pump head of the roller pump.

Abstract: A connecting rod used for a multiple chamber compressor pump comprises a central section having in the main surface thereof an opening for receiving therein a bearing for an eccentric of the multiple compressor pump, at least two pushing sections, and respective hinge areas arranged between the central section and the pushing sections and generating restoring forces, when the pushing sections are deflected relative to the central area.

Abstract: A compressor has an internal refrigerant gas passage selectively connected to and disconnected with an external refrigerant circuit separately provided from the compressor. The compressor has a plurality of pistons reciprocable in a plurality of cylinder bores in a housing for compressing gas. The compressor comprises a drive shaft rotatably supported by the housing. A swash plate is supported on the drive shaft for integral rotation with inclining motion with respect to the drive shaft. The swash plate is movable between a maximum inclined angle and a minimum inclined angle. A rotary valve is disposed in the middle of the internal refrigerant gas passage for synchronously rotating with the drive shaft. The rotary valve has a refrigerant supply passage for sequentially supplying the refrigerant gas in the internal refrigerant gas passage to each cylinder bore.

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 limit engine lug. The invention includes a sensor for producing a parameter signal indicating the load on the engine and a pump control for varying the displacement of the variable displacement pump in response to engine load increasing above a predefined level. The response of the pump control is restricted to allow the engine to reach a predefined operating state.

Abstract: A fuel pump for automotive vehicles which has a pump housing and an outlet housing at the respective ends of a pump motor with an armature and a stator. A drive and support shaft at one end of the armature is journaled for rotation in a bearing in the pump housing. The shaft and bearing at the one end of the armature serves as the only bearing and support for the armature in a cantilever relation to the pump housing.

Abstract: A diaphragm-type pump includes a disk-like diaphragm made of an elastic material which is held between an upper housing and a lower housing. In this diaphragm-type pump, the diaphragm, which has a flat shape before it is mounted in the pump, is bent along a diaphragm stopper and mounted in the pump. Consequently, an urging force is constantly applied to the diaphragm in such a direction as to press it on the diaphragm stopper. The diaphragm is deformed in response to reciprocation of a plunger, and when the plunger reaches the bottom dead center and a cylinder chamber is decreased in pressure, the diaphragm is pressed on the diaphragm stopper by the urging force toward the diaphragm stopper and a feed pressure of a feed pump.

Abstract: An IV pump for delivering fluid through a resilient, deformable tube to improve the accuracy, consistency, and predictability of flow through the tube, wherein a plurality of pinching fingers occlude the tube against a flat portion of a pressure pad, and a plurality of pumping fingers interspaced between said pinching fingers deform the tube (without occluding it) from different directions against a V-shaped portion of the pressure pad to pump the fluid downstream as well as to urge the tube to restore its cross-sectional area.

Abstract: An IV fluid delivery system for use with a resilient, deformable tube, wherein a mechanism is provided to deform and occlude said tube by a plurality of fingers, as well as, to restore the cross-sectional area of said tube by those fingers, so as to improve the accuracy, consistency, and predictability of flow through the tube.

Abstract: Disclosed is a pump that employs a magnetic coupling to connect the motor to the impeller. A simplified structure within the pump casing is employed to enable the easy removal of the pump's impeller and bushings and/or bearings. In one embodiment of the invention, the exterior surface of the impeller, including its attached magnets, is encased in a plastic bushing material. Surrounding the impeller is a tubular bushing that may at times come into contact with the bushing material of the impeller.

Abstract: An IV fluid delivery system for use in connection with a resilient, deformable tube, wherein pinching fingers occlude the tube and pumping fingers deform the tube (without occluding it) against a first pressure pad or support means in a pumping action, while restoring fingers urge the tube against a second pressure pad or support means to restore its cross-sectional shape, so as to improve the accuracy, consistency, and predictability of flow through the tube.

Abstract: A hermetic compressor including a suction muffler disposed opposite the suction inlet tube. A funnelled or countersunk inlet port on the muffler permits semi-direct refrigerant flow into the muffler, creating enhanced cooling of the motor and higher compressor efficiency. Baffle walls disposed parallel and on opposite sides of an internal standpipe within the suction muffler create an increased resonator effect with optimum refrigerant throughput.

Abstract: An infusion pump system for continuously injecting a medical substance contained in a supply chamber into a catheter connected to the body of the patient. The system includes a flattening means driven by a motor (10) and designed to flatten a portion (42) of the infusion tube and exert pressure in order to inject the medicinal substance into the catheter. The flattening means includes a rigid member such as a circular plate (32) of which the axis (34) has a geometrical position determined according to a hub (12) driven by the motor (10) in such a way that said axis (34) of the plate intersects the axis (14) of the hub at a fixed point (X). The plate (32) has projections (38, 40) which flatten the catheter (42) as the motor (10) rotates. A fork (43) held by a ball (44) prevents the plate (32) from rotating relative to the catheter. Friction on the walls of the catheter (42) is thus avoided and high infusion accuracy may be achieved.