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WO/2006/087036A1 |
A pumping apparatus (1) adapted for delivering fluid against pressure. The pumping apparatus has a plurality of metering devices (3,5) adapted for metering a plurality of different fluids, and has a booster device (7) adapted for increas...
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WO/2005/093254A1 |
A fluid compressor comprises a fluid inlet (104), a fluid outlet (106), a first series of a plurality of interconnected compression cylinders (40, 41, 42) and pistons (56, 58, 60) and a second series of the same number of corresponding i...
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WO/2005/059362A1 |
The invention relates to a piston compressor (15) which is used to compress gaseous media and which contains a differential piston (1) provided with a first piston part (16) and a second piston part (17) which are arranged on an axis. Tw...
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WO/2005/015017A1 |
The high pressure pump comprises a housing (10), inside of which a drive shaft (12) and at least one pump element (14) are placed. The at least one pump element (14) has a pump piston (20), which is driven in a reciprocating motion by th...
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WO/2004/106739A1 |
The invention relates to a piston vacuum pump (10) with a single reciprocating body (14), comprising a piston (16,18) at each longitudinal end, which each reciprocate in a cylinder (20,22) and, together with said cylinder (20,22), form a...
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WO/2004/044421A2 |
A fluid pump (2) includes a piston (8) defining a fluid-charging chamber (CC) on one side and a fluid-pumping chamber (Cp) on the other. A one-way valve (Vp) carried on controls communication between the two chambers.Valves (V1, V0) are ...
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WO2003047658B1 |
A vapor-compression distiller includes a rotary heat exchanger. A reciprocating compressor (26) maintains a pressure difference between the compressor's evaporation chambers (46) and its condensation chambers (44). The compressor is asse...
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WO/2004/018873A2 |
A two stage gas compressor, comprising: a first compressor stage, comprising a first chamber, a first piston and a second piston, the first and second pistons being rigidly connected by a first connecting member, thereby defining a first...
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WO/2003/102418A1 |
A yoke structure for a compressor is disclosed, which is applied to a scotch yoke type reciprocating compressor. The yoke structure comprises a crankshaft (10); a crankpin (20) connected to the crankshaft (10), to rotate along a predeter...
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WO/2003/102416A1 |
A multi-stage compressor is disclosed, which comprises: two motion converters driven by one driving shaft and converting a rotary motion to a straight-line reciprocating motion; first and second pistons (62) connected to one of the motio...
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WO/2003/052270A1 |
A multi−stage, reciprocable hand operable air pump (1) comprises a first and inner static cylinder (4)&semi a piston (5) reciprocable within the inner cylinder (4) and carried by a piston rod (6) extending to a handle (3), a second and...
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WO/2003/048577A1 |
A double action pump (10) having a cylinder (26), a housing (28), a piston (20) for reciprocating motion within the cylinder (26), a piston rod (30) extending externally of the pump (10), a drive assembly (14) for the piston (20), and a ...
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WO/2003/036087A2 |
The invention concerns the control of kinematics of piston stroke in heat engines operating in a 3-stroke or 5-stroke cycle wherein the pistons (1, 1A) are stopped in their movement and maintained at their top dead center for a period of...
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WO/2003/036088A1 |
The invention concerns a motor compressor-motor alternator unit with supplementary compressed air injection, comprising a high-pressure compressed air reservoir (25) and using a piston stroke control as well as an ambient heat energy rec...
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WO/2003/031817A1 |
A medium and high pressure pump systems supplies a cryogenic fluid from a storage tank and methods of operating such systems to remove both liquid and vapor from the storage tank to reduce the need for venting. The system comprises a pum...
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WO/2003/010436A1 |
The invention relates to a multistage compressor (1) for compressing gases with a low-pressure region (7) and a high-pressure region (4), whereby the high pressure region (4) comprises at least one reciprocating piston compressor (3), dr...
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WO/2002/099280A1 |
The invention relates to a multi-stage piston-type vacuum pump (1) comprising an inlet (71), an outlet (70), at least one pair of pistons (2, 3), and several compression stages, which are assigned to the faces of the pistons and each hav...
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WO/2002/095226A1 |
The invention relates to a novel piston compressor whose return valves have a very good closure force and are extremely tight. The inlet return valve (15) is provided with a first sealing membrane (17) and the outlet return valve (30) is...
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WO/2002/095227A1 |
The aim of the invention is to guarantee a high level of impermeability with a low closing force for the sealing elements. To achieve this, the overflow channel (19) in the valve piston (9) opens into at least two passages (26, 27) and t...
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WO2001046585A9 |
The invention relates to a piston arrangement for a dual-stage piston compressor, comprising a crankshaft and several cylinders which house the operating pistons. Said arrangement allows two or more low-pressure stages and at least one h...
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WO/2002/068822A1 |
The invention relates to a dry-running piston compressor, in particular for rail vehicles. Said compressor comprises a crankcase (3) for a crankshaft (15) that is rotatably mounted in said crankcase, the latter being provided with at lea...
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WO/2002/044564A1 |
The invention relates to a low-vibration, multi-stage, piston compressor, in particular for rail vehicles, with a low-pressure stage and at least one subsequent high-pressure stage, comprising essentially a rotational motion generating d...
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WO/2002/040867A1 |
Known piston compressors generate a large proportion of lost heat. This has a negative influence on the energy balance of the piston compressor and costly cooling measures are required to protect the piston compressor. The invention ther...
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WO/2002/018787A1 |
The invention relates to a piston compressor comprising a one-piece crankshaft, whose mass is dynamically compensated. Said compressor substantially consists of several well-shaped cylinders (6a to 6c), arranged on a housing (3) for a cr...
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WO/2002/018788A1 |
The invention relates to a piston compressor, especially for rail vehicles, consisting essentially of a drive unit (2) producing a rotational movement (2), and a downstream compressor unit (1). Said compressor unit consists essentially o...
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WO/2001/088374A1 |
A reciprocating compressor (1), comprising a first low pressure chamber (30A) leading a low pressure refrigerant into a pump chamber (43) of a cylinder (40), a second low pressure chamber (30B) leading the low pressure refrigerant into t...
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WO/2001/071188A1 |
Displacement type machinery, wherein a second reciprocating mass (26) performing a reciprocating motion in the direction at right angle to the reciprocating motion direction of a first reciprocating mass (A) is added to the first recipro...
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WO/2001/051809A1 |
A multistage type piston compressor, comprising a case and a suction chamber and a delivery chamber formed therein, wherein a rotating shaft is supported rotatably in the case, a valve plate installed in the case comprises a suction port...
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WO/2001/046587A1 |
A plurality of compression paths establishing communication between a suction chamber and a discharge chamber are arranged in parallel. Each compression path is internally provided with a plurality of compression chambers, and fluid suck...
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WO/2001/046592A1 |
The invention relates to a dry compressing vacuum pump (1) having a continuous or graduated inner compression and comprising a gas ballast device (8) having an isolating valve (11); the gas ballast device (8) also comprises a non-return ...
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WO/2001/046586A1 |
A two-stage compressor, comprising a first bore in charge of primary compression and a second bore in charge of second compression, wherein a first piston is stored in the first bore and a second piston is stored in the second bore, a fi...
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WO/2001/044635A1 |
The invention relates to a compressor system for producing compressed air. Said system is comprised of a compressor which is driven by an internal combustion engine, which is connected to compressed air tapping points via a line, and to ...
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WO/2001/027475A1 |
The invention relates to a multi-stage diaphragm-type compressor (100) and to a method for the multi-stage compression of gases. At least two piston-cylinder units arranged at equal angular intervals from each other around the axis of ro...
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WO/2001/006123A1 |
The invention relates to a method and compressor module for compressing a gas stream of entry temperature t¿1? with the aid of hydraulically driven piston compressors in two compression stages of an entry pressure p¿1? from an intermed...
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WO/2001/002725A1 |
The two cylinder and piston systems (1, 3), operating in series, are driven by a crankshaft, with a minimum or even zero phase difference.
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WO/2000/070222A1 |
The invention relates to a piston vacuum pump (1), comprising a housing (13), with cylinders arranged therein. The invention also comprises pistons in the cylinders and a common crankshaft (11) for the pistons. In order to achieve a simp...
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WO/2000/034656A1 |
A reciprocating compressor capable of producing a steady-state, continuous, non-pulsing outflow at volumes less than 25 gallons per hour. The compressor utilizes at least two pistons driven in a near axial manner with any lateral forces ...
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WO/1999/024714A1 |
This invention relates to a medium and high pressure liquid natural gas fuel system for internal combustion engines and for other cryogenic systems. A cryogenic pump comprising: (a) a vessel for containing compressed gas and liquid; (b) ...
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WO/1998/053203A1 |
A two-stage compressor comprises a housing (1), a rotor (10) rotatably arranged in the housing (1), and a piston assembly (20), which is intended for stroke motion and which comprises at least one part which is non-rotatably arranged ins...
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WO/1998/039570A1 |
The invention relates to a vacuum pump, comprising at least one pump chamber (7, 8, 23 to 26) and at least one chamber (3, 5, 27) adjoining said pump chamber. The vacuum pump is fitted with a gas ballast device in order to avoid damage b...
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WO/1998/009079A1 |
The invention concerns a vacuum pump (1) having an inlet (3) and an outlet (4). According to the invention, in order to prevent disturbance from excess pressure in the pump (1) when it is started, a differential-pressure-controlled inlet...
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WO/1998/009077A1 |
A vacuum piston pump (1) has an inlet (3), an outlet (4), and four stepped cylinders (12, 22, 32, 42) which form cylindrical compression chambers (14, 24, 34, 44) and ring-shaped compression chambers (15, 25, 35, 45) together with respec...
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WO/1996/034199A1 |
There is presented a gas compressor including a housing (2) defining adjacent first and second chambers (4, 6) in axial alignment, a rod (8) extending through the first chamber and into the second chamber, a tubular projection (10) exten...
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WO/1996/022464A1 |
Disclosed is a compressor that serves to compress a working medium and in particular to generate compressed air. This compressor has at least one piston that travels back and forth in a working area to compress the working medium, a driv...
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WO/1996/015367A1 |
The device makes it possible precisely to guide and centre machine components, e.g. a piston rod (7) or a piston (3, 4) in a cylinder (5, 6). Two guides (11, 12) are spaced apart perpendicularly to the longitudinal axis (2) of the piston...
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WO/1995/006204A1 |
The invention pertains to a device for compressing gas, with a housing (10) that contains a separating element (12) along which a piston (14), moved by a drive mechanism, passes through two dead-center positions. By providing a three-sta...
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WO/1993/010353A1 |
The compressor includes a cylindrical housing (1), in the bore of which moves a piston (3) whose periphery is adjusted with little play in the cylinder (1). The end (5) of the piston (3) includes a gas inlet (6) and supports two spherica...
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WO/1993/001411A1 |
By employing a sleeve piston construction, it is possible for a piston-type air pump (a compressor or a vacuum pump) to have a number of compression stages in one cylinder and for a piston-type fluid pump to continuously pump out fluid b...
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WO/1989/000245A1 |
This invention is a multi-stage compressor (1, 5) embodying a stepped piston (5) in a stepped cylinder (1) and connected through a coaxial rod (4) to the piston (3) of an engine. Control means (10) in a passageway or a conduit extending ...
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WO/1985/003111A1 |
A multistage resonant reciprocating compressor having opposed pistons (72-75) that are driven by a plunger unit (32). The plunger unit (32) is suspended between a pair of spaced apart flexure springs (35) and is electrically coupled to a...
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