Abstract: The invention relates to a fluid compression apparatus comprising a first and a second compression chamber, an intake system communicating with the first compression chamber, a transfer system communicating with the first and second compression chambers, and a mobile piston for ensuring the compression of the fluid in the first and second compression chambers. The apparatus further comprises a discharge port which communicates with the second compression chamber and is configured to allow the outlet of compressed fluid, wherein the second compression chamber is defined by a part of the body of the piston and a fixed wall of the apparatus, the piston being translationally mobile according to a longitudinal direction, the piston having a tubular portion mounted around a fixed central guide, a terminal end of the central guide forming the fixed wall defining a part of the second compression chamber.

Abstract: A piston type pump includes a pump housing having at least one pump inlet, at least one pump outlet, and a piston arrangement connected to a drive shaft configured to, when driven, set the piston arrangement into movement. The piston arrangement includes a first primary stage piston, the first primary stage piston being slidably seated in a first primary stage cylinder formed in the pump housing, and a first secondary stage piston. The first secondary stage piston is slidably seated in a first secondary stage cylinder formed in the first primary stage piston.

Abstract: A linear compressor is provided that may include a cylinder, to which a discharge valve may be coupled; a first piston, which may be provided to enable a reciprocating motion in an inside of the cylinder; a second piston, which may be provided to enable a reciprocating motion in an inside of the first piston; a first compression chamber formed between the discharge valve and the first piston; and a second compression chamber formed between the first piston and the second piston. The first piston and second piston may move in opposite directions with respect to each other.

Abstract: A turn-back coaxial gas pressurizing pump and gas pressurizing method using the same, relate to the field of gas pressure boosting. The turn-back coaxial gas pressurizing pump includes a primary cylinder, a primary piston, a secondary cylinder serving as a rod of the primary piston, a pressure bar, an air pump bonnet, a secondary piston and a piston rod. The primary cylinder, the secondary cylinder and the piston rod are arranged coaxially. A rear end of the piston rod extends through a first non-returning adaptive valve provided in the primary piston and is fixed on the bottom wall of the primary cylinder. As a result, the two pistons move in opposite directions to boost the pressure.

Abstract: A multistage air pump has a cylinder assembly, a second piston assembly slidably mounted through the cylinder assembly, and a first piston assembly protruding in the second piston assembly. Multiple chambers are defined in the multistage air pump, and communicate with each other via multiple one-way mechanisms. Air drawn into the multistage air pump is compressed in multiple stages within a single push, such that a large amount of high pressure air is provided.

Abstract: A draining device includes a draining mechanism, two conduits, and a driving mechanism. The draining mechanism includes a first cylinder defining a cavity, a first cover and a connecting member mounted on two opposite ends of the first cylinder respectively, a piston rod extending through the connecting member, and a first piston assembly mounted on the piston rod. The first cover defines a first draining hole, the connecting member defines a second draining hole. The two conduits is coupled to the first cylinder corresponding to the first and the second draining holes respectively, and communicating with the cavity. Each of the two conduits includes a first conduit and a second conduit. A first and a second check valves are positioned in the first and the second conduits respectively. The driving mechanism is mounted on the connecting member, configured to drive the piston rod to slide in the first cylinder.

Abstract: Apparatus (1) for providing a supply of natural gas fuel comprising a compressor (2) having an inlet (3) for a stream of natural gas (4), wherein the inlet (3) may be placed in fluid communication with an LNG storage tank (5) in order to provide a supply of boil-off gas (6) from out of the LNG storage tank (5), and an outlet (7) which may be placed in fluid communication with a natural gas supply pipe (8), characterised in that the compressor (2) comprises a first and subsequently a second compression stage (9, 10), wherein the first and the second compression stage (9, 10) take the form of labyrinth-sealed piston-compressors (11, 12) or piston-ring-sealed piston-compressors (15), and wherein the first compression stage (9) features a larger piston diameter than the second compression stage (10), and that the compressor (2) comprises at least a third subsequent compression stage (13, 14), which takes the form of a piston-ring-sealed piston-compressor (11, 12) or a labyrinth-sealed piston-compressor (15).

Abstract: A compression apparatus for compressing a fluid, the apparatus having a frame and a motor mounted to the frame, the improvement comprising a drive mechanism installed on the frame so as to be driven by the motor and at least one piston-cylinder unit operably connected to the drive mechanism, the piston-cylinder unit having a cylinder, a piston slidably installed within the cylinder, and a piston rod interconnecting the piston and the drive mechanism so as to shift the piston up and down within the cylinder.

Abstract: The present invention relates to a reciprocating compressor. The present invention can reduce the size of the compressor by closely attaching and securing a reciprocating motor and a cylinder of a compression part to a sealed receptacle to reduce a gap between a main body of the compressor and the sealed receptacle. In addition, an assembling process for the compressor can be simplified by separating a mover of the reciprocating motor and a piston of the compression part from each other. In addition, the vibration of the sealed receptacle can be minimized by properly adjusting the mass of the components in the reciprocating motor and the compression part, and the elasticity of a spring for supporting the reciprocating motor and the compression part to offset the force applied to the sealed receptacle. In addition, the efficiency of the reciprocating motor can be enhanced by increasing the relative velocity of the reciprocating motor in comparison with the relative velocity of the compression part.

Abstract: A reciprocating air pump with a frame and a pump for compressing air through a series of linear close-strokes and open-strokes between a first portion and a reciprocating portion. The pump includes plural cylinders, slideably and sealably engaged therein, and arranged as multiple-chambers defining multiple-stages, for compression of air. A manifold with an air inlet cavity and inlet vent, and a compressed air outlet cavity with outlet vent. An outlet valve body is disposed between the first portion and the manifold, with an outlet valve that directs high-pressure compressed air into the outlet cavity, and with an inlet port coupled to the inlet cavity. A reciprocating linear drive with an electric motor delivers linear force to the reciprocating portion. A control system sequentially alternated the direction of force of the reciprocating linear drive, thereby applying linear force to the reciprocating portion.

Abstract: A reciprocating-piston compressor having at least two working cylinders arranged in series, along a cylinder axis is described. The compressor includes a piston in each of the cylinders, guided in an axially movable manner, and a common axially actuated piston rod of the pistons, extending through a passage opening in a partition between the at least two working cylinders. The at least two working cylinders are sealed off with respect to one another in a region of the common axially actuated piston rod, exclusively by a non-contact seal. The axial seal has an axial gap seal formed between a radially outer circumferential surface of the common axially actuated piston rod and a radially inner circumferential surface of the passage opening.

Abstract: A multiple-chamber, multiple-stage reciprocal pump for compressing air through a series of up-strokes and down-strokes. The pump includes an upper reciprocal portion and a fixed portion. The fixed portion further includes a base housing with an ambient air inlet cavity and a compressed air outlet cavity formed therein. It further includes an outlet valve body fixed to the base housing with an outlet valve pneumatically coupled to direct high-pressure compressed air into the outlet cavity. The outlet valve body also has an inlet port pneumatically coupled to the inlet cavity, and there are plural cylinders coupled to the outlet valve body, which slideably and sealably engaged with the upper reciprocal portion, thereby enabling the series of up-strokes and down-strokes to compress air.

Abstract: A fluid content monitor including a cuvette, a calorimeter adapted to generate a signal indicative of contents of a fluid sample contained in the cuvette, a container for holding a reagent, and a pump assembly for delivering reagent from the container to the cuvette. The pump assembly includes a tube extending from the container to the cuvette, check valves preventing reverse flow in the tube, and a hammer driven by a solenoid for repetitively compressing the tube to pump reagent to the cuvette. The cuvette can be removed for cleaning and replacement.

Abstract: A spacer forming device according to the present invention includes glass plate fixing means for fixing one glass plate, an applicator head for applying a spacer forming material, spacer forming material supply means having an extruding means that extrudes the spacer forming material while melting and mixing the material and a fixed displacement pump for supplying the spacer forming material extruded from the extruding means to the applicator head, and an articulated robot that moves the applicator head along the periphery of the one glass plate. By using the spacer forming device, the spacer forming material is applied from the applicator head along the periphery of the upper surface of the one glass plate thereon to form a spacer.

Abstract: A multiple-chamber, multiple-stage reciprocal pump for compressing air through a series of up-strokes and down-strokes. The pump includes an upper reciprocal portion and a fixed portion. The fixed portion further includes a base housing with an ambient air inlet cavity and a compressed air outlet cavity formed therein. It further includes an outlet valve body fixed to the base housing with an outlet valve pneumatically coupled to direct high-pressure compressed air into the outlet cavity. The outlet valve body also has an inlet port pneumatically coupled to the inlet cavity, and there are plural cylinders coupled to the outlet valve body, which slideably and sealably engaged with the upper reciprocal portion, thereby enabling the series of up-strokes and down-strokes to compress air.

Abstract: A linear compressor for multi-compression includes a stationary cylinder, a moving piston, and a stationary piston. The stationary cylinder has a first compression chamber formed therein. The stationary cylinder is provided at one side thereof with an outlet part. The moving piston is movable forward and backward by a linear motor, that compresses a fluid in the first compression chamber. The moving piston has a second compression chamber formed and is provided, at the position where the second compression chamber communicates with the first compression chamber, with a first valve. The stationary piston is fixedly disposed in the compressor. The stationary piston is fitted in the moving piston so that the fluid in the second compression chamber is compressed as the moving piston is reciprocated.

Abstract: The invention concerns a pump for compression of gases, such as air, of the type comprising a first cylinder and a second cylinder, a piston dividing said first cylinder into a first chamber located ahead of the piston and a second chamber located behind the piston, the piston and the second cylinder arranged to be displaced jointly relative to the first cylinder. A third chamber is formed between end walls of the cylinders and communicates with said second chamber via at least one opening formed in the jacket wall of the first cylinder. The pump is characterized by an inlet provided in the second end of the second cylinder in order to allow passage of air into a fourth chamber formed between the second end of the second cylinder and the end wall of the first cylinder, said fourth chamber communicating with said third chamber via a through-passage channel, wherein a valve is provided, formed in the end wall of the first cylinder.

Abstract: In order to maintain high efficiency close, to isothermy despite high frequencies in a pneumo-hydraulic converter with reciprocating pistons, pipe cluster-heat exchange pipes (38) are provided in the gas working chambers of the converter and the exchange fluid in the pipes is kept at approximately ambient temperature. For this the gas working chambers must be arranged axially next to one another and, in order to eliminate dead space, connected in pairs by conical exchange valves (12a/12b) which take in the entire wall thickness of the valve flange (5a/5b) dividing the air chambers.

Abstract: A pump for compression of air includes a first inner stationary cylinder (1) arranged a second displaceable cylinder (2). A piston (3) arranged for reciprocating motion together with the first cylinder (1) divides the interior space of the first cylinder (1) into a first and a second chamber (8,9). A third cylinder (15) surrounding the second cylinder (2) is formed with a fourth chamber (16) in communication, via a passage (17), with a third chamber (12) in the second cylinder (2) and, via an inlet valve (19), with the surrounding atmosphere. Displacement of the piston rod (4) in one direction forces the air in the third chamber (12) into the first and second chambers (8,9) with resulting pressure increase in said chambers (8,9). At the same time, air is sucked into the fourth chamber (16). Upon displacement of the piston rod (4) in the opposite direction, the air in the fourth chamber (16) is forced into the third chamber (12) and further into the first chamber (8).

Abstract: A telescopic manual pump has a first cylinder, a second cylinder received in the first cylinder, a third cylinder received in the second cylinder, a piston slidably received in the third cylinder and a stem linked to the piston. The first cylinder defines a nozzle through a first end and an opening through a second end. The second cylinder defines a first opening through a first end, a second opening through a second end and a piston about the second end thereof. A first limit is attached to the second end of the first cylinder for retaining the piston of the second cylinder in the first cylinder. The third cylinder defines a first opening through a first end, a second opening through a second end and a piston about the second end thereof. A second limit is attached to the second end of the second cylinder for retaining the piston of the third cylinder in the first cylinder. The piston has first and second disks spaced from each other. A plurality of holes are defined through the first disk of the piston.

Abstract: An improved positive displacement pumping system uses a pair of pumps operating in opposition to one another to provide continuous and constant volumetric flow at a constant predetermined pressure.

Abstract: A four-stage gas compressor including: a double-acting piston operable by pressurized oil and provided with first and second hollow opposed piston rods the first of which is connected to a first-stage piston and the second of which is connected to a second-stage piston; said first and second-stage pistons being arranged to slide in first and second jackets respectively and being a sliding fit upon first and second cylindrical bodies respectively; said first and second cylindrical bodies respectively being fixed to first and second opposed heads; a first axial suction and delivery duct leading to an end face of said first cylindrical body, a third stage chamber being defined between said end face and one face of the double-acting piston; and a second axial suction and delivery duct leading to an end face of said second cylindrical body, a fourth stage chamber being defined between said end face of said second cylindrical body and the other face of the double-acting piston.

Abstract: The invention relates to a cryogenic pump for liquid gases which comprises, within a housing, a cylinder connected to the supply of liquified gas through a non return valve and to an overflow duct. A movable piston is displaceble within this cylinder defining a suction chamber and an evacuation chamber and this piston carries a skirt cooperating with a piston rigidly fixed to the frame defining together a compression chamber. This compression chamber is connected through a non return valve to the high pressure output of the pump and to the suction chamber by means of at least one passage provided with a non return valve.

Abstract: The output from the pump chamber of a higher volume piston pump is divided between a return bypass and the pump chamber of a smaller volume piston pump; the piston of the high volume piston pump is periodically raised by a cam to draw fluid into the pump chamber; when this piston is released, a spring forces fluid from the high volume pump chamber; the pump chamber of the small volume pump is connected with the cam such that the volume of the low volume pump chamber decreases, thereby pumping out the fluid in that chamber, when the large volume pump chamber is taking in fluid, and vice versa; appropriate valves ensure that flow is only in the desired direction; adjustment and calibration means are provided for the low volume pump.

Abstract: A pneumatic rifle and hand gun for discharging a projectile under the influence of a source of compressed gas such as air. The pressurization of the source is achieved by with pressure increasing mechanisms which compress atmospheric air in two separate stages using a single cocking or pumping action of the rifle or hand gun. The rifle and hand gun are provided with a recoil compensation device to eliminate recoil of the rifle and hand gun during discharge of the projectile. The compression of the atmospheric air to provide the source of high pressure is achieved through a novel piston and cylinder arrangement which pressurizes the gas during pumping or cocking action of the rifle or hand gun. A further mechanism provides for a projectile discharged from the rifle or hand gun to be subjected to constant pressure during discharge thereof.