Abstract: A variable capacity compressor in which each compression chamber has a reexpansion chamber the volume of which is selectively controlled by pressurized lubricant.

Abstract: A lubrication pump with a stroking action of a delivery piston and with regulatable metering of the amount of lubricant delivered with each stroke of the pump, wherein the delivery piston is actuated by the pump and aspirates the lubricant into a suction space whose volume is adjustable, wherein furthermore the lubrication is fed from the suction space through an intermediate storage space to the lubricant outlet or to the lubrication circulation circuit and wherein a check valve is provided in the above-mentioned delivery path of the lubricant, so that, when viewed in the delivery direction of the lubricant, the check valve is located following the receiving space and upstream of the intermediate storage space.

Abstract: A reciprocating pump suitable for use in an implantable medication dosage device has a piston movable in a chamber connected to a medication reservoir, the chamber having an output closable by a check valve. The check valve includes a movable element which is acted upon by a biasing system to urge the moveable element in a direction to close the check valve. The moveable element has a sealing surface against which an end face of the piston presses with tight adjacency as the piston moves to an extreme position during its output stroke.

Abstract: A clearance pocket having a housing attached to a cylinder of the compressor. In one embodiment, in which the housing has a sidewall and a distal wall and includes a clearance chamber with a passageway extending between the cylinder head and the clearance chamber, the pocket also has a piston movably located in the clearance chamber in slidably sealing engagement with the interior sidewall of the housing, and means for providing fluidic communication between the cylinder head and that portion of the clearance chamber between the piston and the distal wall of the housing.

Abstract: A control valve for a variable displacement pump is improved so that the levelling of the pressure fluctuations of the pump is better and quicker. For this purpose an additional control piston portion on the control piston of the control valve is used. Corresponding to the deflection of the control piston the constriction cross-section set by the control piston portion between the supply connected to the pump pressure line and a passage leading to the control space of the variable pump is varied so that the pressure rise in the control space of the pump and also the pressure drop is accelerated.

Abstract: An arrangement for the volume-controlled feed of a medium, e.g. a liquid, in an outer flow system, comprising a movable pump piston (10) and a metering chamber (20) in connection, or connectable, to the flow system via a valve-controlled inlet (22) and outlet (23) for the intake and discharge respectively of the medium in time with the working cycles of the pump piston (10). To make possible the change between different desired feed volumes of the medium the arrangement has a wall element (15) delimiting the volume of the metering chamber (20) which is movable inside the metering chamber (20) for the adjustment of the desired metering chamber volume.

Abstract: A method and several embodiments of apparatus are disclosed for modulating the capacity of a gas compressor. A discharge valve member is formed with an opening therein and fluid communication between the compression chamber and a clearance pocket is selectively established by a slidable plunger element. In a first position, the plunger fills the opening in the discharge valve member to close fluid communication between the clearance pocket and the compression chamber. In a second position, the plunger element moves away from the valve member to establish fluid communication between the compression chamber and the clearance pocket, wherein the reexpansion volume is increased and the capacity of the compressor reduced. In the preferred embodiment, an apertured neck member is provided. The valve member is slidably guided by outer walls of the neck member, and the plunger has a stem designed to slidingly fit within the neck aperture.

Abstract: A control valve for a variable displacement pump is improved so that the levelling of the pressure fluctuations of the pump is better and quicker. For this purpose an additional control piston portion on the control piston of the control valve is used. Corresponding to the deflection of the control piston the constriction cross-section set by the control piston portion between the supply connected to the pump pressure line and a passage leading to the control space of the variable pump is varied so that the pressure rise in the control space of the pump and also the pressure drop is accelerated.

Abstract: A diaphragm type pump device comprising a casing having a cover in which an inlet valve is installed, a diaphragm dividing the interior of the casing into a suction chamber and a discharge chamber, a movable plate attached with the diaphragm and having a discharge valve, and a slide shaft for causing said diaphragm to reciprocatingly move through the movable plate, wherein a rubber sheet is provided to be closely in contact with the diaphragm integrally attached to the movable plate when the movable plate reaches the upper dead point so that fluid does not remain in a space formed between the diaphragm and the rubber sheet.

Abstract: A control system for a compressor unit driven by a clean-burn, turbo-charged, gas-fueled engine which is primarily responsive to the load (torque) and the speed of the engine to adjust certain engine parameters to maintain the operating conditions of the engine within a desirable operating zone which is a compromise or "trade-off" between best fuel economy and permissible exhaust emission levels. A number of "maps" which correlate load (torque) at various speeds with specific fuel consumption and exhaust emissions are derived from available manufacturer's data and are programmed into a central processing unit (CPU).

Abstract: A simple capacity modulation device for a compressor is disclosed which includes a modulating member slidably disposed in a cylindrical enclosure associated with a compression chamber. Pressure from a low pressure chamber or a high pressure chamber is piloted to one end of the modulating member while pressure in the compression chamber is applied to the other end. The modulating member moves to and remains in a position for increasing or decreasing the top volume of the compression chamber in response to a pressure differential acting thereon.

Abstract: Disclosed herein is a combined fuel and oil pump comprising a reciprocally movable member for pumping fuel in response to member reciprocation, a reciprocally movable element for pumping oil in response to element reciprocation, and a fluid pressure actuated motor connected to the member and to the element and responsive to a source of alternating relatively high and low pressures for effecting reciprocation of the member and the element at a frequency less than the frequency of the alternation of the relatively high and low pressures.

Abstract: The present invention comprises an apparatus for producing high pressure fluid by means of a cylinder having a reciprocatingly sliding ram inside, suction and pressurization of the fluid being performed by the reciprocation of said ram. In the apparatus, an oil chamber is positioned on the intensifying side within said cylinder, and lubricating oil in said oil chamber is caused to have a pressure equivalent to that of the high pressure fluid produced. This oil pressure is transmitted to the slidable contact portions of the ram. The apparatus is capable of detecting the lack of lubricating oil, when such lack of lubricating oil occurs.

Abstract: Apparatus is provided for temporarily advancing the timing of a fuel injection pump of the type having timing means responsive to a source of fuel under pressure correlated with the speed of an associated engine and also to the pressure of fuel in the pump housing. Valve means is provided for venting the pump housing which means may be manually or automatically actuated such as by use of a solenoid.

Abstract: A variable volume pump for satisfying the requirements of a hydraulic system while limiting fluid flow when the full volume of fluid displacement from the pump is not required by the hydraulic system. The pump includes one or more lines of reciprocable pumping pistons mounted radially around a crankshaft. The rotation of the crankshaft results in centrifugal flow of fluid through crankpin apertures for filling the pumping pistons. Each pumping piston reciprocates within a pumping chamber and the fluid volume filling the piston is directed through a discharge port to the hydraulic system. A valve piston is mounted within the pumping chamber in spaced apart opposing relationship to the pumping piston. The valve piston is normally seated against a valve seat when the pressure level in the hydraulic system is below that necessary to reduce flow.

Abstract: A portable closed wound suction device is provided which is adapted to be worn on the body following outpatient and other limited surgical procedures. Specifically, the device provides a rigid container which is adapted to be strapped to the body of a patient with a tubular connection to a wound for collecting fluids from the wound. The container is provided with a wall which may be moved from an inactive position to a locked outer position so as to create suction within the device. The rigid container cannot be tampered with by the patient.

Abstract: An engine internal-combustion engine having cylinders secured symmetrically spaced on a wheel rotor equipped with a main shaft and with their piston rods extending outwardly against a substantially saddle-shaped cam. The operation of the engine will make the reciprocating piston rods confront the undulating top surface of the cam and therefore revolve the internal-combustion cylinders themselves together with the wheel rotor along the undulating surface. The invention also includes an oil pressure cam receiver to cushion the cam confronting the piston rods and push the pistons to their maximum inward position in the cylinder to achieve a desired compression ratio of the fuel-air mixture in the combustion chamber of the cylinder.

Abstract: A unique drive for an engine or compressor piston, including an angularly inclined piston wrist pin, an inclined throw along a crankshaft, a piston connecting rod therebetween being additionally slidable along the axes of the wrist pin and throw at each rotation of the crankshaft, and a guide and shift device for sliding the connecting rod for long or short strokes, the device being slideable transversely through an engine cylinder.

Abstract: An acceleration pump of a carburetor is constituted by a cylinder and a piston slidably received by the cylinder, so that the delivery rate of the acceleration fuel may be changed in accordance with the change of stroke of the piston within the cylinder. The stroke of the piston is limited by a stopper member adapted to be directly actuated by an incompressible temperature detecting element. The stopper member is so arranged as to be moved in the direction perpendicular to the stroking direction of the piston, so as to provide a fine adjustment of the stroke of the piston and, accordingly, an accurate control of the delivery of acceleration fuel in relation with the change of the engine temperature.

Abstract: A variable-output pump has an output-adjusting element which is acted upon by a differential piston arrangement having oppositely facing active surfaces of a smaller and of a larger active area. Control fluid is permanently admitted to the smaller active area of the differential piston arrangement to act on the same and urge the output-adjusting element of the pump toward a low-output position. A biasing spring acts against the force of the fluid acting on the smaller surface, and the control fluid is also selectively admitted to the larger surface to urge the adjusting element toward higher outputs. A control slide controls the admission of the control fluid to the larger surface of the differential piston arrangement and has a housing provided with a bore in which a slide is mounted for movement longitudinally of the bore. The slide has an end face acted upon by the control fluid and another end face acted upon by a spring.

Abstract: A piston type compressor for use in an automotive air conditioning system with variable pumping or compressing capacity which is automatically modulated in response to operating conditions. Compressor improvements are solely to the piston so that the present investment in fixed displacement compressors is not diminished. Previous compressors may be modified by the substitution of the improved pistons to create a variable capacity compressor. Specifically, the piston modifications include a pressure responsive displacement means on the piston end which extends into the compression chamber during portions of the intake stroke and compression stroke to effectively decrease the volumetric pumping capacity of the compressor whenever a predetermined low pressure is sensed.

Abstract: A piston type fluid pump structure providing a selective variable operating fluid displacement, and including a piston having an operable travel, within a cooperable cylinder bore, through a pump stroke which may be of fixed length, a fluid supply port being provided which communicates with the interior of the cylinder bore when the piston is in a retracted position and a fluid outlet port communicating with interior of said bore through which fluid therein may be discharged during such pump stroke, an expansion chamber being provided in communication with the cylinder bore adjacent the discharge port therein, the effective volume of the expansion chamber being selectively variable whereby the output displacement of said pump structure may be varied by controlling the volume of said expansion chamber, and therewith the amount of fluid received therein during a pump stroke.