Abstract: The invention relates to a metering pump for feeding out viscous materials, which pump comprises a housing having an inlet, connectable to a viscous material source, and an outlet; a valve body of cylindrical basic shape, which is rotatable into at least two positions by means of a drive unit, a first position allowing a flow of the said material from the inlet to the housing and a second position allowing a flow of the said material from the housing to the outlet. The pump also comprises a cylinder device connected to the housing, having a controllable piston intended to achieve the said flow of material, and at least one device for cleaning the metering pump. The said cleaning device comprises at least one nozzle for cleaning agent, disposed in a valve-body-facing part of the piston. The invention also relates to a method for cleaning such a metering pump.

Abstract: To provide an efficient piston pump having a small number of parts and simple assembly steps, and consuming less current in achieving a relatively low ultimate pressure. The piston pump comprises: a suction port (28) through which gas sucked by varying the volume of a pump chamber (22) defined by a cylinder (12) and a piston (14) fitted in the cylinder (12) passes as the piston (14) is reciprocated, an exhaust port (20) through which the gas discharged by varying the volume of the pump chamber (22) passes, a suction valve (26) installed in the suction port (28) disposed on a piston top, and an exhaust valve (18) installed in the exhaust port (20) disposed on a top of the cylinder (12).

Abstract: A piston of the type comprising a tubular skirt portion which is closed, next to an end edge, by a head portion, the skirt portion being defined by a respective tube extension and presenting an end edge region configured to affix a head portion formed in a separate piece and having a peripheral contour internal to an axial projection of the outer contour of the skirt portion.

Abstract: A water pump for delivering water from a well to the surface has a housing with a reciprocable plunger disposed therein. The housing is preferably comprised of PVC and tubulars which are connected to make up the plunger assembly are likewise PVC. A proximity bushing is disposed in the housing and the plunger assembly reciprocates in the housing through the proximity bushing. Reciprocation of the plunger assembly draws water into the housing and forces water from the housing into the plunger assembly to the surface.

Abstract: Disclosed herein is a linear compressor in which a piston reciprocally moves in a cylinder upon receiving a reciprocating drive force of a linear motor to compress working-fluid, for example, refrigerant, received in the cylinder. The linear compressor comprises the piston adapted to reciprocally move in the cylinder, the piston being internally formed with a suction path, a suction valve to open or close the suction path of the piston to selectively connect the suction path of the piston to the interior of the cylinder, and a suction valve stopper to limit the degree of opening of the suction valve, whereby no excessive stress is applied to the suction valve. This has the effect of eliminating damage and deformation of the suction valve, minimizing vibration and noise due to the opening/closing operations of the suction valve, and maintaining the compression efficiency of the compressor at a constant value.

Abstract: A pump device and method minimizes the quantity of air in a vehicle brake system by reducing the volume of detrimental space. The device includes a piston movable between first and second end points, a line system that conducts fluid through the device, and a closing element, movable between an open position releasing the flow of the fluid and a closed position interrupting the fluid flow, that selectively releases the flow of the fluid through the device. The line system includes a through-line formed in the piston for conducting the fluid through the piston. By virtue of a section of the through-line that receives the closing element in the piston, a force is generated that is transmittable from the fluid to the closing element that moves the closing element in the direction of its closed position when the piston is moving in the direction of the first end point.

Abstract: The invention relates to a cylinder piston arrangement for an especially volumetric fluid pump or a fluid motor, preferably comprising at least one axial expansion tubular membrane piston defining at least one inner pulsating working chamber. A particular field of application for such pumps or motors is the operation thereof with fluids loaded with extraneous materials, especially abrasive granulated materials. Especially high-speed machines with high working pressures of between a few hundred to a thousand bar are required, the energetic and also volumetric degree of efficiency thus becoming highly important factors. The aim of the invention is therefore to create pumps or fluid motors which are characterised by high degrees of efficiency and long service lives. To this end, at least one clearance driving body (TK1) is actively connected to the pulsating working chamber (AR).

Abstract: A foam pump, comprising a pump body (1), a big cover (2), a big piston (3), a small piston (4), a piston rod (5), a head cap (6) and a foam screen (7), featured by that: said pump body (1) is at the upper part, said big cover (2) is at the lower part, said pump body (1) being integrated with said big cover (2), said head cap (6) being integrated with the lower big piston (3); a sealing ring (9) of elastic materials being provided between said big piston (3) and the inner wall of said pump body (1) for tight engagement, which forms an one-way valve structure, which makes the pump body and the big cover integrated, thus the air cavity can be enlarged, the working pressure of the foam pump can be improved with the big cover of the same size, and the foaming effect of the foam pump can be enhanced; said head cap being integrated with said big piston, a sealing ring is provided between said big piston and the inside wall of the pump body, which simplifies the structure of the big piston and makes the internal stru

Abstract: A hand operated pump for generating negative and positive air pressure. The pump includes a pump body having a pump cylinder and a piston mounted for reciprocation in the cylinder. A selector valve communicates with the cylinder and is moveable between a positive-pressure position and a negative-pressure position. The arrangement is such that operation of an actuator to move the piston through a power stroke when the selector valve is in its negative-pressure position causes the pump to generate negative pressure at an outlet of the pump, and operation of the actuator to move the piston through a power stroke when the selector valve is in its positive-pressure position causes the pump to generate positive pressure at the outlet of the pump. A method of operating such a pump is also disclosed.

Abstract: A downhole pump has a barrel and a plunger which reciprocate with respect to each other. The plunger has a first portion with a first seal, a second portion and a third portion with a second seal. The second portion is intermediate the first and second portions. A balancing chamber is formed between the plunger second portion and the barrel. The balancing chamber communicates with the plunger interior by way of an opening. A sand snare chamber is provided with respect to the opening so as to prevent sand from contacting the seals in the balancing chamber.

Abstract: A pump arrangement is arranged to be driven by a rotating shaft and comprises a piston arrangement that generates a flow pulse. The piston arrangement has pistons that move axially forward and backward. An actuating device is connected to the rotating shaft and drives the piston arrangement. The actuating device has a cross section of constant width with at least three corners. During rotation caused by the rotating shaft, the actuating device is arranged to interact with carrier devices that are associated with the pistons.

Abstract: A piston used in a vehicle air-compressor or a vehicle suspension system can be dismantled by a dismantling tool so that cost for a repair is reduced while components are replaceable instead of the whole piston.

Abstract: A pump jack system for reciprocating a pump rod string is made up of a base frame and piston drive cylinders mounted on the base frame with the upper end of the pump rod connected to the cylinder assemblies, the cylinder assemblies being operated in unison by a fluid control circuit communicating with inner and outer concentric fluid passages, and the pump rod string is counterbalanced by a fluid circuit which supplies pressure in an upward direction to each of the pistons on each upstroke and substantially reduces the pressure on each downstroke, the fluid circuit being selected from an inert gas alone or an inert gas pressurizing a hydraulic fluid. The fluid control circuit includes a directional control valve and timer, along with a fluid dampener, which is automatically responsive to dampen pressure surges and acceleration shocks at the beginning of each upstroke and downstroke.

Abstract: The invention provides fuel supply pump that can improve the durability of a fuel inlet valve and stably pressure-feed high pressure fuel of a large flow rate. In the fuel inlet valve according to the invention, a valve piston includes, in its outer surface in the vicinity of an end portion on an opposite side of a collar portion, a groove portion to which a fastener for fixing the valve piston and a spring seat locks. The spring seat includes an open portion into which the valve piston is inserted and includes, along an edge of the open portion, a step portion to which the fastener locks. The valve piston is inserted into the open portion of the spring seat, and the fastener is thereafter caused to lock to the groove portion of the valve piston. The spring seat is energized by a spring to cause the fastener to lock to the step portion, whereby the spring seat is fixed to the valve piston.

Abstract: A gastight interface for an evacuation device comprises a flexible suction cup adapted to form a gastight seal with a surface surrounding a valve disposed on a container and extending from an evacuation end of an evacuation chamber. The flexible suction cup has an aperture disposed therethrough for fluid communication with the evacuation chamber. A plurality of support members extends from the evacuation end of the evacuation chamber to restrict movement of the flexible suction cup between the surface and the evacuation end of the evacuation chamber to allow fluid communication between an interior of the container and the evacuation chamber through the valve when the valve is in an open position while the piston is being reciprocated between the closed end and the evacuation end. Each support member has a distal surface disposed outside of an outer perimeter of the flexible suction cup.

Abstract: An adjustable length bicycle mountable hand pump. The pump includes a barrel having an internal cylinder within which a piston is reciprocatingly moveable. A piston rod connects to a piston at a proximal end and to a handle at a distal end. The handle is selectively, longitudinally, adjustably lockable relative to the barrel. The end of the handle is contoured to mate with a bicycle frame member. A head having a contoured portion mates with an opposing spaced bicycle frame member.

Abstract: A pump jack system for reciprocating a pump rod string is made up of a base frame and piston drive cylinders mounted on the base frame with the upper end of the pump rod connected to the cylinder assemblies, the cylinder assemblies being operated in unison by a fluid control circuit communicating with inner and outer concentric fluid passages, and the pump rod string is counterbalanced by a fluid circuit which supplies pressure in an upward direction to each of the pistons on each upstroke and substantially reduces the pressure on each downstroke, the fluid circuit being selected from an inert gas alone or an inert gas pressurizing a hydraulic fluid.

Abstract: A compact compressor including one or more heads. Each of the compressor heads is configured with at least one of the intake and output valves incorporated into the piston head. The compact compressor also has a cylinder with a reduced mass, increased surface area, and metal to metal contact with the housing for greater dissipation of heat generated by the compressor.

Abstract: The present invention relates to a piston pump for delivering hydraulic fluid, including a reciprocating piston for building up pressure in a pressure chamber; a sealing element is situated on the piston; during a compression phase, this sealing element produces a seal between the pressure chamber and a low-pressure region of the piston pump and during an intake phase, it opens a connection between the pressure chamber and the low-pressure region in order to draw hydraulic fluid into the pressure chamber.

Abstract: The invention relates to a device for feeding lubricating oil to an internal combustion engine. This device comprises a lubricating oil pump and an oil pressure regulating apparatus. The lubricating oil pump is designed as a reciprocating piston valve pump and the oil pressure regulating apparatus is designed as a multistage oil pressure regulating apparatus.

Abstract: The invention relates to a piston pump for conveying a fluid, in particular in a vehicle brake system. The piston pump has a cylinder and a piston movably disposed in the cylinder. A restoring element preloads the piston, and a drive unit for actuates the piston in the cylinder to pump the fluid into a pressure chamber formed in the cylinder. The piston is embodied by a first piston par and a second piston part. The first piston part is a cylindrical body, which can be moved by the drive unit. The second piston part form the piston base, in which four radial inlet openings and one axial connection opening for communication with the pressure chamber are disposed. A flange for the disposition of a seal is disposed on the outer circumference of the piston base element. The openings are simple to make in the face ends and circumferential regions of the second piston part.

Abstract: A pump having an increased energy efficiency is provided. The pump has an internal power fluid column and a transfer piston which is reciprocatingly mounted about the power fluid column. The transfer piston defines a product fluid chamber, located above the transfer piston valve, and a transfer chamber, located below the transfer piston valve. The power fluid column has at least one passageway, which allows the fluid inside the power fluid column to be in communication with a power fluid chamber. The power fluid chamber, the transfer chamber, and the product chamber are situated coaxially about the power fluid column.

Abstract: A pumping apparatus (10), for delivering liquid at a high pressure at which compressibility of the liquid becomes noticeable, comprises a piston (20) adapted for reciprocation in a pump working chamber (30), wherein a movement of the piston (20) into a first direction (40) decreases a first volume (V1) in the pump working chamber (30) and increases a second volume (V2) in the pump working chamber (30), and a movement of the piston (20) into a second direction (50) opposite to the first direction (40) increases the first volume (V1) and decreases the second volume (V2). A coupling (70, 80, 90, 100) is provided for coupling the first volume (V1) with the second volume (V2) as long as a pressure (Psup) in the first volume (V1) exceeds a pressure in the second volume (V2). An outlet valve (120) is provided for coupling the second volume (V2) with an outlet (110) of the pumping apparatus (10) as long as a pressure in the second volume (V2) exceeds a pressure (Psys) at the outlet (110).

Abstract: A fluid end for a high-pressure pump including a unitary body with a plurality of horizontal passages each for receiving a reciprocating plunger at one of its ends and a pressure relief valve at the other of its ends. The body is provided with a corresponding number of vertical passages each of which intersect one of the horizontal passages and contains a suction valve at its bottom and a discharge valve at its top. A suction manifold is hingedly attached to the bottom of body to provide a flow of fluid into the body via the suction valves. A discharge passage intersects the vertical passages and receives fluid pressurized by the plungers via discharge valves and ports such from the fluid end.

Abstract: A pump for use with a dispensing unit of a liquid hot melt adhesive system, dispensing units including the pump, and a method of operating a pump for pumping a liquid like liquid hot melt adhesive. The pump has a piston movable within a pumping chamber for transferring liquid from an inlet to an outlet. A valve body, which is resiliently biased relative to the piston, is moved out of contact with the inlet when the piston moves in a first direction and into contact with the inlet when the piston moves in a second direction. When the piston is moved in the first direction, the resilient biasing actively lifts the valve body out of contact with the inlet for overcoming any attractive adhesive force acting between the valve body and inlet.

Abstract: In order to achieve a high level of impermeability with a low closing force for the sealing elements of a multistage piston compressor, the overflow channel (19) in the valve piston (9) opens into at least two passages (26, 27) and the sealing plate of the overflow check valve (20) that is located in the valve piston (9) is configured as a freely guided closing membrane (28) with a limited stroke. The passages (26, 27) of the overflow channel (19) have different diameters, are arranged on a graduated circle at a radial distance from the axis of the closing membrane (28) and are completely covered by the closing membrane (28).

Abstract: A cylinder and head assembly for a linear compressor has a cylinder chassis (35, 11), a cylinder liner (12) open at both ends and a valve plate (5) defining a barrier between the compression end (37) of the cylinder liner (12) and the head space (7) defined by the cylinder chassis. The valve (5) plate is located between an annular shoulder (39) of the cylinder chassis (35) and an open end of the cylinder liner (37).

Abstract: A piston pump including a pump housing, a piston provided at the inner bore of the pump housing and assembled with an annular sealing member to form a pump chamber. The piston is configured to slide at an inner wall of the inner bore. The annular sealing member is assembled with the piston so as to slide at the inner wall of the inner bore in the axial direction together with the piston. And a first sliding range of the piston relative to the inner wall of the inner bore and a second sliding range of the annular sealing member relative to the inner wall of the inner bore do not overlap each other in the axial direction.

Abstract: A metering pump device for a vehicle heater includes an inlet chamber, an outlet chamber, a first valve arrangement between the inlet chamber and the outlet chamber, which permits a fluid exchange substantially only from the inlet chamber to the outlet chamber, a displacement piston element, which in a first piston position minimizes the volume of the inlet chamber and in a second piston position minimizes the volume of the outlet chamber.

Abstract: A pump jack system for reciprocating a pump rod string is made up of a base frame and piston drive cylinders mounted on the base frame with the upper end of the pump rod connected to the cylinder assemblies, the cylinder assemblies being operated in unison by a fluid control circuit communicating with inner and outer concentric fluid passages, and the pump rod string is counterbalanced by a fluid circuit which supplies pressure in an upward direction to each of the pistons on each upstroke and substantially reduces the pressure on each downstroke, the fluid circuit being selected from an inert gas alone or an inert gas pressurizing a hydraulic fluid. The fluid control circuit includes a directional control valve and timer, along with a fluid dampener, which is automatically responsive to dampen pressure surges and acceleration shocks at the beginning of each upstroke and downstroke.

Abstract: A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body has upper and lower fluid ports to allow the ingress and egress of well fluids from the body as the plunger reciprocates. If the tool fails, it typically does so by the body breaking into two parts, namely the upper body and lower body, at the upper fluid ports. The upper end of the plunger is provided with a fishing neck. Thus, upon failure of the body at the upper fluid ports, the fishing neck is exposed and can receive a fishing tool for retrieval of the tool and the pump.

Abstract: A high-pressure fluid is continuously generated with high efficiency without causing pulsation of pressure by reciprocally moving a piston having first, second and third chamber sections under the control of an actuator including an operating pressure source and a directional control valve. With the reciprocating motion of the piston, liquid or fluid such as gas is fed into the first, second and third chamber sections in sequence through check valves and finally discharged outside at high pressure. The actuator is operated hydraulically, mechanically or electrically.

Abstract: An automatic oil pump includes a drive chamber, having a reciprocal driving device, and an oil chamber, having a sucking device, located on two sides of a main body. The reciprocal driving device has a piston unit having a valve chamber at its center and a balance valve and is pushed by a spring. The drive chamber has grooves on its inside wall. The piston unit has two channels, allowing air to flow into the valve chamber past two sides of the piston unit. On the piston unit is a driving rod. The driving rod penetrates into the main body and reaches into the oil chamber. A hermetic cover and a movable piston are attached to an end of the driving rod. On the wall of the piston are pluralities of through holes. The reciprocal driving device drives the piston in the oil chamber to move reciprocally, so oil is sucked into and out of the oil chamber continuously. Thereby, oil sucking speed and volume are upgraded to save time and labor, and oil pumping efficiency is enhanced.

Abstract: In a reciprocating compressor including a piston slide-inserted into the compression space of the cylinder, having a gas path therein, inducing a fluid into the compression space through the gas path and varying a volume of the compression space while performing a linear reciprocating motion with a mover of a reciprocating motor; a suction valve combined with the front end of the piston detachably and adjusting suctioning of the fluid into the compression space; and a discharge valve combined with the front end of the piston detachably and opening/closing the compression space of the cylinder in the linear reciprocating motion of the piston, a suction valve assembly of a reciprocating compressor includes an elastic member for absorb impact of the suction valve in clash and a combining member consisting of a head portion having a width so as to be overlapped with part of an opening/closing portion of the suction valve or a retainer and a valve seat, and accordingly a reliability of the compressor can be improv

Abstract: A pump priming apparatus including a housing through which fluid object material may be urged to flow, the housing including an intake portion and a pumping portion downstream from the intake portion. The apparatus further includes a piston assembly carried for reciprocation in the housing, the piston assembly and the housing being configured such that a partial vacuum is developed in the pumping portion of the housing as the piston assembly moves through the pumping portion of the housing toward the intake portion of the housing and such that the partial vacuum is substantially released upon the movement of the piston assembly into the intake portion of the housing, thereby causing the fluid object material in the intake portion of the housing to flow into the pumping portion of the housing.

Abstract: A suction valve coupling structure for a reciprocating compressor is disclosed in which a piston being linearly moved in a cylinder upon receipt of driving force from an electric mechanism unit, according to which gas flows through a gas flow passage formed therein, is coupled by welding to a valve for opening and closing the gas flow passage, thereby strengthening the coupling state of the suction valve. Since the coupling structure is simplified, a dead volume is reduced and a stroke volume is increased, improving compression efficiency. A stroke control of the piston is facilitated to enable a precise control of movement of the piston. In addition, a reliability of the coupling of the suction valve can be improved.

Abstract: A positive-displacement oil pump is disclosed. In the oil pump, an insert body is fitted into a central opening of a shaft body to a height of an oil-feeding hole. The insert body is rotated along with the shaft body, and includes a central hole formed in the insert body, a cylindrical lip formed around an outlet of the central hole, a fluid discharge diode provided in an inlet of the central hole, and an inclined groove formed around an outer circumferential surface of the insert body such that the inclined groove forms a closed curve. A piston is movably fitted over the insert body such that the piston is axially moved while changing a volume of a displacement space defined between the insert body and the piston.

Abstract: A pressure-limiting pump system for pressurizing a vessel, including a plunger terminating in a piston loose-fitting within a cylinder. The piston includes a flange forming the lip of an annular groove in the piston for supporting an O-ring seal. The groove is provided with a plurality of ports terminating in the piston within the cylinder. The O-ring is slidable on the piston groove surface. On the intake stroke, the O-ring moves to uncover the ports, and on the compression stroke, the O-ring moves to cover the ports to seal the compression chamber. When pressure exceeds a predetermined level, further compression causes air to bypass the O-ring and escape from the chamber, thereby limiting system pressure. The pump system may be mounted on-axis or off-axis in a tank sidearm. A handle is secured to the sprayer tank via shoulder inserts and is pivotable out of the way when filling the tank, yet can be locked in position as desired by a shift in pivot position.

Abstract: A gas compressor and method according to which a piston assembly reciprocates in a bore to draw the fluid to be compressed into the bore during movement of the piston unit in one direction and to compress the fluid during movement of the piston unit in the other direction.

Abstract: The fluid machine can be used as a pump, compressor, motor and internal combustion engine and is characterized by two mobile opposite cylinders fixed rigidly to each other. Said cylinders move simultaneously in the same direction. Inside the opposite cylinders there are two fixed opposite pistons rigidly secured to the housing and each said piston is made with suction and discharge valves designed to connect the working cavity between the corresponding piston and cylinder with low and high pressure sources. Within one cycle of the reciprocating movements of opposite cylinders (direct and back) the liquid is twice sucked into cylinder chambers from the low pressure source and is supplied twice under pressure to the high pressure source.

Abstract: A valve coupling structure of a reciprocating compressor and a coupling method thereof, including a piston (20) which performs a linear reciprocating movement inside a cylinder (10) by having a gas flow path (F) in which gas flows, a valve (40) which is positioned to be contacted on an end surface of the piston (20) to open and close the gas flow path (F) of the piston (20), and a diffusion bonding portion (D) which is diffused and combined to a part of an end surface of the piston (20) and the contact surface of the valve (40) which is contacted on an end surface of the piston (20) by movement of atoms or movement among atoms which form the valve (40) using an energy source of the outside can make coupling state of the piston (20) which performs linear reciprocating movement inside the cylinder (10) and valve (40) more firm.

Abstract: The invention relates to a radial piston pump, comprising an inlet chamber with an inlet connection, an eccentric which may be driven in a rotating manner, arranged within the inlet chamber, for driving at least one piston of the radial piston pump, a cylinder bore for guiding the piston and an inlet controller, which opens and closes a connection between the inlet chamber and the cylinder bore, depending on the piston position. The radial piston pump is characterized by at least one balancing element (24, 25) for the eccentric (17), which rotates synchronously with the eccentric (17) in the inlet chamber (20), the balancing element (24, 25) being so arranged in the inlet chamber (20) and/or so formed in its contour that a hydraulic resistance is formed between the inlet connection (8′) and inlet controller (31), or the flow of medium reaching the inlet controller (31) is unaffected.

Abstract: A fuel pump for an automotive vehicle includes a housing having an opening extending therethrough, and a piston slidably supported within the opening. A pair of end caps are mounted to the housing, thereby encasing the piston within the opening. First and second pumping chambers are defined by the opening, first and second ends of the piston, and the end caps. Each of the first and second pumping chambers has an inlet adapted to allow fuel to flow into the pumping chambers and an outlet adapted to allow fuel to flow out of the pumping chambers. A drive device is adapted to move the piston back and forth within the opening, thereby alternately increasing and decreasing the volumes of the first and second pumping chambers.

Abstract: A traveling valve for use in a sucker rod pump having a cylindrical housing having an interior passageway and a tapered shoulder formed therein and a piston received within the interior passageway and slidable therein. The piston has a mechanically operated sliding shear seal positioned interior of the housing. The piston has a surface thereon generally conforming to a shape of the tapered shoulder in the interior passageway. Separate channels extend through the wall of the housing so as to communicate between the interior of the housing and the annulus of the tubing string.

Abstract: A fluid pump includes a piston disposed within a compartment and defining therewith a fluid-charging chamber on one side of the piston and a fluid-pumping chamber on the opposite side of the piston. The piston is formed with an opening therethrough establishing communication between the chambers. A one-way valve carried by the piston is effective to close the opening through the piston during the forward-pumping strokes and to open the opening during the return strokes. Further valve means are provided effective: to open the inlet with respect to the fluid-charging chamber during the forward-pumping strokes, to close the inlet with respect to the fluid-charging chamber during the return strokes, to open the outlet with respect to the fluid-pumping chamber during the forward-pumping strokes, and to close the outlet with respect to the fluid-pumping chamber during the return strokes.

Abstract: A reciprocating compressor includes a piston which reciprocates in a cylinder; a suction valve mounted at an end surface of the piston; a discharging valve assembly that compresses and discharges gas taken into a compression space; and a suction valve fixing member engaged to a frontal surface of the piston to movably receive the suction valve.

Abstract: A rotary piston machine includes a first spheroidal element including pistons and/or cylinders and a second spheroidal element including pistons and/or cylinders, wherein the first element can move relative to the second element. The machine can be used as part of a pump, compressor, or engine.

Abstract: A gas compression apparatus for a reciprocating compressor includes a reciprocating motor generating a linear reciprocal driving force, a compressing cylinder positioned within a predetermined distance from the reciprocating motor, a position controlling cylinder positioned within a predetermined distance from the compressing cylinder, an initial position variable type piston inserted into the compressing cylinder and the position controlling cylinder, and being linearly and reciprocally moved within the compressing cylinder and the position controlling cylinder, and a pressure controlling valve controlling a pressure inside the position controlling cylinder with the pressure of the gas discharged from the discharge chamber.

Abstract: A gas suction apparatus for a reciprocating compressor, including a piston having a gas flowing passage where refrigerant gas flows, being inserted in the compression space formed in a cylinder enabling linear reciprocating movement, a fixing means combined to the piston and an inertia valve inserted in the gas flowing passage of the piston movably having a moving distance restricted by the fixing means, for opening and closing the gas flowing passage moving according to the pressure difference and inertia generated by the linear reciprocating movement of the piston can minimize dead volume of a gas compression space, ease controlling of a stroke and make the suction flowing of gas smoothly by an excellent reliability of response of valve, thus to improve compression performance. The damage of the component can be also prevented by increasing structural strength, thus to improve reliability.

Abstract: An oil-free air compressor is characterized in an air inlet provided at a lateral open end of a crankcase of the air compressor. External air enters into the crankcase via the lateral air inlet and then enters into a cylinder above the crankcase via a check valve provided on a piston head in the cylinder. Air in the cylinder is compressed by the piston head and then discharged to an air storage tank via a single air outlet provided on a cylinder head of the cylinder.