| Entries |
| Document | Title | Date |
|---|
| 20080267801 | Double action simplex diaphragm pump - A double-acting, simplex, fluid handling pump is designed to facilitate an optional configuration as either a plunger pump or a diaphragm pump. An injection molded plastic pump body comprises two bilaterally symmetrical halves that include internal pockets and grooves for clamping and retaining first and second generally identical valve assemblies at opposing end portions of the pump body. When configured as a plunger pump, first and second plunger are arranged to move 180 degrees out-of-phase with respect to one another within stationary guide sleeves that are clamped within the pump body where one plunger effecting a suction stroke while the other effects a compression stroke. When configured as a diaphragm pump, the plungers are removed from the connecting rods and replaced by diaphragms and a change is made in the valve casing employed but a majority of the remaining parts of the pump assembly remain unchanged from what is used in the plunger pump. | 10-30-2008 |
| 20080279707 | High-Pressure Pump, in Particular for a Fuel Injection Apparatus of an Internal Combustion Engine - The high-pressure pump has at least one pump element which has a pump plunger which is driven in a reciprocating motion and defines a pump working space into which fuel is drawn in from a fuel feed via an inlet valve during the suction stroke of the pump plunger and from which fuel is displaced into a high-pressure region via an outlet valve during the delivery stroke of the pump plunger. The inlet valve and/or the outlet valve has a valve member at least approximately in the shape of a ball which interacts by means of a sealing surface with a valve seat arranged in a valve housing. By means of the valve member, in the open state, when said valve member is lifted with its sealing surface from the valve seat, a first cross section of flow is cleared between the valve member and the valve seat, and downstream of the first cross section of flow, a second cross section of flow is formed between the valve member and the valve housing. In the direction of flow between the first cross section of flow and the second cross section of flow, a third cross section of flow is formed between the valve member and the valve housing, said third cross section of flow being larger than the first cross section of flow and the second cross section of flow. | 11-13-2008 |
| 20080310980 | Valve Mounting Arrangement For a Refrigeration Compressor - A valve mounting arrangement for a refrigeration compressor which presents a compression chamber closed by a valve plate having a suction orifice closed by a valve element having a mounting end portion. The mounting arrangement comprises: a first retaining means to retain the mounting end portion of the valve element inside a receiving recess of the valve plate; and at least one orientation projection carried by receiving recess and/or the mounting end portion of the valve element and to be fitted into an orientation recess in the other part; and/or a second retaining means provided between the receiving recess and the mounting end portion of the valve element, so as to avoid the latter from moving from the receiving recess before mounting the first retaining means. | 12-18-2008 |
| 20090010789 | FUEL PUMP FOR INTERNAL COMBUSTION ENGINE - A fuel pump includes a pump housing having a compression chamber. A plunger is axially movable in the pump housing for pressurizing fuel in the compression chamber. A discharge valve is configured to open to supply fuel from the compression chamber to an internal combustion engine when pressure in the compression chamber is more than predetermined pressure. A fuel passage is configured to communicate a downstream of the discharge valve with an upstream of the discharge valve. An in-passage member is accommodated in the fuel passage. The in-passage member includes multiple members, which are combined to define a throttle portion for restricting fuel, which returns from the downstream of the discharge valve to the upstream of the discharge valve. | 01-08-2009 |
| 20090087329 | Compressor Having Improved Valve Plate - A compressor may include a compressor body defining a compression cylinder, a compressor head coupled to the compressor body, and a valve plate assembly disposed between the compressor head and the compressor body. The valve plate assembly may include a first valve plate formed as a unitary casting and defining a suction chamber exposed to a suction pressure region of the compressor. | 04-02-2009 |
| 20090142210 | Suction structure in piston type compressor - A suction structure allows refrigerant from a suction pressure region in a piston type compressor. The suction structure includes a shifting device, a bleed passage, and a check valve. The shifting device has a valve body, a return spring, a backpressure chamber, and a backpressure passage. The valve body is movable between a connecting position and a disconnecting position. The return spring urges the valve body from the connecting position toward the disconnecting position. The backpressure chamber is defined by the valve body. The backpressure passage communicates with the suction pressure region and the backpressure chamber. The bleed passage communicates with the suction pressure region and the backpressure chamber. The check valve allows a fluid to flow from the backpressure chamber into the bleed passage. | 06-04-2009 |
| 20090148322 | Cylinder apparatus, compressor and manufacturing method of cylinder apparatus - There is provided a cylinder apparatus consisting of a cylinder, a piston performing reciprocating motion between a top dead point and a bottom dead point with oscillatory movement in the cylinder, wherein the cylinder has an oscillatory distance between the top dead point and the bottom dead point, which is shorter than the oscillatory distance at the top and bottom dead points. | 06-11-2009 |
| 20090191077 | PUMP - In a cylinder, a plunger is reciprocated in a plunger receiving hole to pressurize fluid in a pump chamber. A delivery passage hole extends in a direction generally perpendicular to an axis of the plunger receiving hole from the pump chamber to a radial intermediate location of the cylinder, which is located between the pump chamber and an outer peripheral surface of the cylinder in a radial direction of the cylinder. A tilted delivery passage hole is tilted relative to the axis of the plunger receiving hole and extends from a portion of the delivery passage hole, which is radially spaced from the pump chamber, toward the outside of the cylinder. | 07-30-2009 |
| 20090214367 | Refrigerant Compressor - A hermetically encapsulated refrigerant compressor having a hermetically sealed compressor housing, in whose interior a piston-cylinder unit operates, whose cylinder housing ( | 08-27-2009 |
| 20090246052 | PUMP OF ELECTRONICALLY CONTROLLED BRAKE SYSTEM - A pump of an electronically controlled brake system. The pump includes a bore formed in a modulator block and connected with a suction port and a discharge port, a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or close an exit-side end of the inlet path according to a position of the piston, and an outlet valve provided at one side of the bore, operations of the inlet and outlet valves being contrary to each other. The outlet valve includes a valve seat, a sleeve to surround the valve seat, an outlet ball interposed between the sleeve and the valve seat and used to open or close a path defined in the valve seat, and a valve cap provided at one side of the sleeve to isolate an interior from an exterior of the bore. One or more of the valve sheet, sleeve, and valve cap are formed by press-forming, to achieve improved assembly efficiency and reduced manufacturing costs. | 10-01-2009 |
| 20090257897 | RECIPROCATING PUMP - The present invention provides a pump having a compact and lightweight design, which enables an improvement in pump efficiency and a reduction in noise. The pump comprises a manifold having a pump chamber, a suction port for sucking fluid from the outside to the inside of the manifold, a discharge port for discharging fluid from the inside to the outside of the manifold, a suction valve which is provided between a suction port and a pump chamber, and opens and closes a flow path of fluid to the pump chamber, and a discharge valve which is provided between the pump chamber and the discharge port, and opens and closes a flow path of fluid from the pump chamber. Furthermore, the suction port, the suction valve, the discharge valve and the discharge port are arranged coaxially, thereby the fluid does not meet unnecessary resistance, the fluid is made to flow smoothly, pump efficiency can be improved, noise can be reduced, and the structure of the manifold can be simplified and made compact and lightweight. | 10-15-2009 |
| 20090324437 | PUMP - The invention concerns a pump comprising a housing; a working chamber located in the housing for delivery of a fluid; a suction channel which is in flow connection with the working chamber for guiding the fluid into the working chamber; a valve unit disposed in the suction channel, the valve unit comprising a guide body, a limiting element which is guided for displacement in the guide body and comprises at least one displacement stop for limitation of displacement, a valve which is movable between an open position and a sealing position for controlling the flow of the fluid into the suction channel, wherein the valve is guided for displacement, and a pressure element which presses the limiting element in the direction of the sealing position of the valve; as well as a pressure channel which is in flow connection with the working chamber for guiding the fluid out of the working chamber. | 12-31-2009 |
| 20100008804 | Pump having improved and adjustable packing - A reciprocating type pump and method with an improved and customizable approach to varying axial pressure is provided. In one embodiment, a pump may be provided with a pump body, a piston reciprocally moveable within a bore of the pump body in response to a piston drive, and axially spaced apart packing means radially expansible in response to axial pressure exerted on the packing means. A packing nut is also provided, which is disposed at the end of the pump opposite the piston drive for adjustably exerting axial pressure on the packings. Springs may also be provided between the axially spaced apart packing means, which may be used for preloading the packing means and compensating for packing wear, swelling and/or dimensional instabilities. | 01-14-2010 |
| 20100008805 | VALVE ASSEMBLY AND SYSTEM - A novel valve assembly is provided. In one embodiment, the valve assembly includes a seat plate that includes a fluid conduit and an impact bushing that is coupled to the seat plate at a position adjacent to the fluid conduit. The valve assembly also includes a sealing assembly that is configured to form a seal with the impact bushing and to control flow of a fluid through the fluid conduit via relative displacement of the sealing assembly from the impact bushing. Systems and methods related to such a valve assembly are also disclosed. Data supplied from the esp@cenet database-Worldwide | 01-14-2010 |
| 20100021327 | COMPRESSOR - Compressor ( | 01-28-2010 |
| 20100098568 | Mud pump systems for wellbore operations - A system for pumping a drilling fluid mixture, the system, in certain aspects, having a pump apparatus, the pumping apparatus having a body with an inlet and an outlet, a suction valve and a discharge valve in the body for selectively controlling flow through the body, or each valve having a curved valve seat and a valve member with a curved seating surface, the valve member selectively movable to seat against the curved valve seat to prevent the flow of the drilling fluid mixture past the valve seat; and, in one aspect, a seal in the curved valve seat against which the valve member is also sealable. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, | 04-22-2010 |
| 20100119395 | VALVE ASSEMBLY FOR FUEL PUMP - A valve assembly for use in a fuel pump comprises a body member with a valve aperture, a valve member movable within the body member and adapted to close the valve aperture, and a biasing arrangement having a first part fixed with respect to one of the body member and the valve member and a second part fixed with respect to the other of the body member and the valve member. The biasing arrangement is adapted to bias the valve member to close the valve aperture. The biasing arrangement comprises a helical spring with a first diameter at the first part and a second diameter at the second part. The first diameter of the helical spring is different from the second diameter of the spring. The helical spring is at its first part retained by an interference fit against the member with respect to which it is fixed. | 05-13-2010 |
| 20100129251 | COMPRESSOR - A compressor that allows a discharge port to assume a large circumference and a large area at an exit end thereof so as to optimize the discharge resistance and the pressure-receiving area and assuring improved volumetric efficiency through reduced dead volume, includes a discharge port | 05-27-2010 |
| 20100172779 | PISTON COMPRESSOR, PARTICULARLY REFRIGERANT COMPRESSOR - The invention concerns a piston compressor, particularly a refrigerant compressor with a compression chamber in a compressor block, the compression chamber being delimited by a cylinder head ( | 07-08-2010 |
| 20100221131 | Pump - The present invention provides a diaphragm-type pump for feeding a low-viscosity fluid such as air under high pressure while miniaturizing the size of a feeding means. In the pump connected with a feeding pipe and a delivery pipe for delivering a fluid fed from the feeding pipe through the delivery pipe, the pump includes a housing provided with a storage chamber connecting with the feeding pipe and the delivery pipe through a one-way valve respectively and storing the fluid therein temporarily, a vibration plate arranged to face the storage chamber in an opposed manner and driven in a reciprocating manner so as to push out the fluid to the delivery pipe after sucking the fluid from the feeding pipe into the storage chamber, and a drive part for driving the vibration plate in a reciprocating manner. A ring-shaped tube is arranged along an outer periphery of the vibration plate, and the vibration plate is mounted on the housing by way of the tube thus enabling driving of the vibration plate in a reciprocating manner while elastically deforming the tube. | 09-02-2010 |
| 20100232997 | Doubled seal disk for piston pump - A pump assembly in the context of a piston pump having a piston carrying a disk which extends radially outwardly to engage a wall of a chamber to substantially prevent fluid flow in one direction and yet permit deflection of the disk away from the wall of the chamber to permit flow in the other direction; the improvement in which two or more of similar such disks are provided spaced axially adjacent one another. | 09-16-2010 |
| 20100232998 | PISTON PUMP FOR DELIVERING A FLUID, AND ASSOCIATED BRAKE SYSTEM - A piston pump includes a piston assembly which has a first piston element, a second piston element, and at least one transverse bore which corresponds to a longitudinal bore. The piston pump further includes a cylinder in which the piston assembly is guided in a longitudinally movable manner, and an inlet valve which includes a cage element, in which an inlet valve spring and sealing element are arranged, and a corresponding inlet valve seat which is arranged on the piston assembly. The inlet valve sealing element can be pressed sealingly into the corresponding inlet valve seat by means of a restoring spring in order to close off the longitudinal bore. The second piston element is configured as a sleeve made of a wear-resistant material, which accommodates axially acting power components. The inlet valve seat is disposed on a bending edge of the second piston element configured as a sleeve. The at least one transverse bore corresponding to the longitudinal bore is placed in the second piston element. The invention further relates to an associated braking system. | 09-16-2010 |
| 20100329911 | CHECK VALVE AND PISTON PUMP HAVING CHECK VALVE - A check valve for arranging between a first pressure chamber, in which a first pressure prevails, and a second pressure chamber in which a second pressure prevails. The valve comprises a valve housing on which a valve seat is formed, and comprises a blocking element which is designed in a blocking position, to close a valve opening in the region of the valve seat, in order to block a connection between the first and the second valve chambers, and is designed in an open position to release the valve opening in order to release the connection between the first and the second valve chambers. The valve seat is configured as an oblique surface, which relative to the flow direction is aligned at an angle which is greater than 15° and less than 80°. The blocking element comprises a planar blocking lobe made from an elastically deformable material which in the blocking position bears against the oblique surface, and in the open position lifts away from the oblique surface in order to release the connection. | 12-30-2010 |
| 20110014076 | Draw back push pump - A piston pump dispenser having a reciprocating piston pump arrangement which in a dispensing stroke dispenses fluid from an outlet and in a charging stroke draws fluid from a reservoir and also draws back fluid from the outlet. | 01-20-2011 |
| 20110091340 | RECIPROCATING PUMP AND CHECK VALVE - A reciprocating pump introduces a liquid into a pump chamber through a suction valve and discharges the liquid from the pump chamber through a discharge valve by reciprocating movement of a reciprocating member facing the pump chamber. The suction valve and the discharge valve include: a body portion having therein a flow path for a liquid; a valve seat portion provided at an entrance side of the flow path of the body portion and having therein a hole through which the liquid flows; a valving element provided in the body portion and able to open and close the hole of the valve seat portion; and a spring provided in the body portion for pressing the valving element into the hole of the valve seat portion. The spring has projections which are formed on an outer circumferential portion of its surface to project toward the inner wall of the body portion. | 04-21-2011 |
| 20110097230 | Compressor - A compressor wherein a valve plate formed with a suction hole and a discharge hole is interposed between a cylinder head and a cylinder block and a discharge valve formed as a reed valve is provided relative to the discharge hole on the valve plate. The discharge hole is formed in a U-shape having a bottom part located at the tip side of the reed valve, and the reed valve is formed as a U-shape extending in correspondence to the U-shape of the discharge hole. The cross-sectional area of flow of discharge gas can be significantly increased to drastically reduce flow path resistance, and excessive compression may be suppressed to greatly improve the efficiency of the compressor. | 04-28-2011 |
| 20110110809 | HIGH PRESSURE PUMP - A fuel gallery has a first opening port communicated to a variable volume chamber formed at a lower side of a plunger and a second opening port communicated to a fuel pressurizing chamber formed at an upper side of the plunger. A connecting tube member is provided in the fuel gallery for communicating the first and second opening ports with each other. During a fuel amount adjusting stroke, for example, in which the plunger is moved in an upward direction, a part of excessive fuel from the fuel pressurizing chamber is supplied to the variable volume chamber through the connecting tube member and the remaining part of the excessive fuel is discharged from the connecting tube member into the fuel gallery through a communication through-hole formed in the connecting tube member. | 05-12-2011 |
| 20110123377 | PISTON COMPRESSOR WITH NO-LOAD OPERATION VALVE - The invention concerns a piston compressor for compressing a compressible medium. The piston compressor includes a compressor stage, which includes a piston guided in a cylindrical space as well as an inlet valve chamber connected with the cylindrical space through art inlet valve and an outlet valve chamber connected with the cylindrical space through an outlet valve. The inlet valve chamber is connected with the cylindrical space through an idle control valve. The idle control valve includes a valve body and a control body. The valve body inner space presents a connection with the cylindrical space of the compressor stage and the valve body outer surface shows a compensation opening connecting the valve body inner space with the inlet valve chamber. The control body can move back and forth on the valve body, in an opening position releases the compensation opening, in a closed position locks the compensation opening and moves into closed position, if a pressure in the outlet valve chamber of the compressor stage arranged downstream exceeds a presettable value. The invention moreover concerns an idle control valve for a piston compressor for compressing a compressible medium. | 05-26-2011 |
| 20110150680 | Disposable Pumping System and Coupler - A coupling system for receiving a push rod includes a housing defining an internal channel having a sloped wall, and a piston received within the internal channel. The piston includes at least one flexible member arranged within the channel to be acted upon by the sloped wall to engage the push rod. The only external force required to couple the push rod is an axial force on the piston in a direction. The only external force required to de-couple the push rod is an axial force on the piston in an opposite direction. | 06-23-2011 |
| 20110150681 | COMPRESSOR HAVING IMPROVED VALVE PLATE - A compressor valve plate assembly includes a first valve plate formed of a unitary casting that separates a compressor head and a compressor body and defines a suction chamber receiving refrigerant at a suction pressure. | 06-23-2011 |
| 20110189040 | Fluid end - A fluid end for a high-pressure pump including a metallic block having a front, back, top, bottom, and opposed sides. The block has a horizontal, plunger passage extending from the front to the back thereof. A horizontal, outlet passage extends from one of the opposed sides of the block to the other with the outlet passage being positioned beneath, and at right angles to, the plunger passage. A suction passage extends vertically downward from the top of the block and intersects the plunger passage to define a pumping chamber at the point of intersection. A discharge passage extends vertically downward from the pumping chamber to the bottom of the block. The discharge passage is located adjacent to the outlet passage. A connector passage extends from the discharge passage to the outlet passage so as to place the discharge passage and outlet passage in fluid communication. A reciprocating plunger assembly is located the end of the plunger passage adjacent the back of the block. A plug is located in the end of the plunger passage adjacent the front of the block. A suction valve is located in the suction passage. A discharge valve is located in the discharge passage. A fluid supply manifold is pivotally secured to the top of the block and is in fluid communication with the suction passage. | 08-04-2011 |
| 20110206546 | Fluid end assembly - A fluid end assembly including a pump housing with a number of interior passages for the flow of fluids. The housing has a plunger bore with a closed inner end and an open outer end. A suction passage intersects the plunger bore. A discharge passage intersects both the plunger bore and the suction passage such that the discharge passage, the suction passage, and the plunger bore radiate outwardly from their point of intersection to define a shape resembling a “Y”. A connector passage branches from the discharge passage. An outlet passage intersects the connector passage and passes through the pump housing at right angles to the plunger bore. A reciprocating plunger is located in the plunger bore. A suction valve is located in the suction passage. A discharge valve is located in the discharge passage. A fluid supply manifold is pivotally secured to the housing and is in fluid communication with the suction passage. | 08-25-2011 |
| 20110274573 | HALF-SLEEVED AND SLEEVELESS PLASTIC PISTON PUMPS - In one aspect, a brake pump assembly with a hydraulic block and a pumping element including a polymer piston that is received in a piston bore. A circumference of the polymer piston defines a high-pressure seal slideably engaging adjacent structure. The polymer piston may include a peripheral sealing lip projecting primarily longitudinally from the polymer piston for sealing engagement with the piston bore. In another aspect, a brake pump assembly with a hydraulic block, a straight bore polymer piston, a peripheral sealing lip projecting from a proximal portion of the polymer piston, and a elastomeric seal mounted to a distal portion of the polymer piston, where the peripheral sealing lip selectively acts to depressurize fluid accumulating between the peripheral sealing lip and elastomeric seal. | 11-10-2011 |
| 20110280755 | PUMP, PUMP ARRANGEMENT AND PUMP MODULE - A pump has an inlet opening, an outlet opening, a pump diaphragm comprising an opening, provided with a passive check valve, through the pump diaphragm, and an actuator configured to move the pump diaphragm between a first position and a second position. The passive check valve is configured such that a movement from the first position in the direction toward the second position has a closing effect, and that a movement from the second position in the direction toward the first position has an opening effect, so that a pumping cycle wherein the pump diaphragm is moved from the first to the second positions, and back, causes a net flow from the inlet opening to the outlet opening. | 11-17-2011 |
| 20110280756 | VALVE DEVICE FOR A PUMP - A pump includes a valve device ( | 11-17-2011 |
| 20120063940 | SUCTION AND DISCHARGE MECHANISMS FOR AN APPLIANCE REFRIGERANT COMPRESSOR - Suction and discharge mechanisms for the compressor of a refrigeration cycle are provided. Two discharge ports for the removal of refrigerant from a compressor are described. Additionally, the present invention can provide a suction valve having an aperture for the flow of refrigerant around and through the suction valve when it is in an open position. As such, the present invention can provide a refrigerant compressor having an improved coefficient of discharge and increased efficiency. | 03-15-2012 |
| 20120121449 | CHECK VALVE - Check valve with a valve housing, on which is formed a valve seat. The valve seat is designed as an oblique face with respect to a flow direction. A shut-off element has at least one sheet-like shut-off tab which is composed of an elastically deformable material and which, in a shut-off position, bears against the valve seat and, in an opening position, is lifted off from the valve seat, in order to allow the passage of fluid. An abutment element is arranged on that side of the shut-off tab which faces away from the valve seat. The shut-off tab can abut against the abutment element in order to limit the amount by which the shut-off tab is lifted off from the valve seat. | 05-17-2012 |
| 20120148431 | Plunger for downhole pumps - A pump plunger for a sucker rod pump includes an elongated plunger body having first and second plunger body ends and a longitudinal plunger body bore extending between the first and second plunger body ends, a first plunger end fitting releasably carried by the first plunger body end of the plunger body, a second plunger end fitting releasably carried by the second plunger body end of the plunger body, a first plunger seal pack sandwiched between the first plunger body end and the first plunger end fitting and a second plunger seal pack sandwiched between the second plunger body end and the second plunger end fitting. | 06-14-2012 |
| 20120195779 | HIGH PRESSURE PUMP - A plunger stopper is installed to a cylinder hole forming portion of a cylinder forming member. The plunger stopper cooperates with a step portion of a plunger to limit movement of the plunger in a state where a slide surface of the plunger contacts an inner peripheral wall surface of the cylinder hole. | 08-02-2012 |
| 20120195780 | HIGH PRESSURE PUMP - A cylinder is configured into a bottomed tubular form and includes an inner peripheral wall, an inner bottom wall, an outer peripheral wall and an intake hole and a discharge hole. The inner peripheral wall slidably guides the plunger. The intake hole and the discharge hole communicate between the inner peripheral wall and the outer peripheral wall. A pump housing includes a cylinder receiving hole that includes an inner peripheral wall, into which the cylinder is inserted. A pressurizing chamber is formed by the inner peripheral wall and the inner bottom wall of the cylinder and a distal end outer wall of the plunger. | 08-02-2012 |
| 20120288389 | VALVE DEVICE AND HIGH PRESSURE PUMP USING THE SAME - A valve seat has an inner passage and outer passages. A suction valve member has first passages and a first projection portion that guides, to the first passages, the fuel that flows from a pressure chamber at the time of valve opening. Therefore, an action force by the dynamic pressure applied to the suction valve member in the valve closing direction is reduced. An action force by the pressure of fuel that flows into pressure equalization grooves counterbalances the action force by the dynamic pressure of the suction valve member. Therefore, self-closing by the dynamic pressure can be inhibited, and the maximum output of an electromagnetic driving unit can be reduced. Fuel flows through a passage radially outside the suction valve member and the first passages. A fluid passage area is securable even when a lift amount of the suction valve member is small. | 11-15-2012 |
| 20120301341 | COMPRESSOR - A compressor includes a valve plate, a suction reed valve, and a seat surface. The valve plate has a suction port that communicates with a compression chamber and a suction chamber. The suction reed valve can open and close the suction port. The seat surface is formed on the valve plate, and is abutted with the suction reed valve when the suction reed valve closes the suction port. The seat surface includes a flat seal surface surrounding the suction port, and a groove surrounding the seal surface. The valve portion of the suction reed valve includes a flat sealing surface which is brought into close contact with the seal surface to close the suction port. The seat surface has a plurality of protrusions which space the seal surface from the sealing surface when the pressures of the compression chamber and the suction chamber are identical. | 11-29-2012 |
| 20130017110 | DIAPHRAGM PUMP USING DUCKBILL AND OTHER TYPES OF VALVESAANM VILLAGOMEZ; ManuelAACI CoronaAAST CAAACO USAAGP VILLAGOMEZ; Manuel Corona CA USAANM MEZA; Humberto V.AACI TustinAAST CAAACO USAAGP MEZA; Humberto V. Tustin CA USAANM PHILLIPS; David L.AACI Santa AnaAAST CAAACO USAAGP PHILLIPS; David L. Santa Ana CA US - A diaphragm pump is provided that features a valve housing configured with inlet openings and outlet openings; inlet duckbill check valve assemblies, each configured to be arranged in a respective inlet opening; and outlet duckbill check valve assemblies, each configured to be arranged in a respective outlet opening; each duckbill check valve assembly comprising: a duckbill check valve seat configured with an end having a slit to open to provide the fluid and particulate, and to close to prevent the backflow of the fluid and particulate; and a duckbill check valve support having a base portion configured to be inserted inside the duckbill check valve seat, and having a W-shaped portion configured with an opening to pass the fluid and particulate through the duckbill check valve support to the duckbill check valve seat and also configured to provide support for walls of the duckbill check valve seat in response to back pressure caused by the fluid and particulate. | 01-17-2013 |
| 20130034459 | Pump - The invention relates to a pump for pumping a fluid, including an inlet, an outlet, and a pumping chamber, wherein a valve is arranged between the inlet and the pumping chamber or between the pumping chamber and the outlet. The valve includes a valve body having a valve seat pointing in the direction of the outlet, and a valve member that interacts with the valve seat, wherein the valve member is loaded under pre-loading against the valve seat into a closed position of the valve and allows fluid to pass through in a pumping direction due to the valve member lifting off against the pre-load, wherein the valve body is accommodated in a receptacle of a pump part. A pump for which the development of noises and vibrations is reduced in that the valve body can move axially relative to the receptacle that accommodates the valve body. | 02-07-2013 |
| 20130078126 | COMPRESSOR - A compressor includes a discharge chamber, compressor chamber, valve plate, and discharge reed valve. The valve plate includes a fixing surface, exposed to the discharge chamber, and a discharge port, which communicates the discharge chamber and the compression chamber. The discharge reed valve includes a fixed portion, fixed to the fixing surface, a base portion, separable from the valve plate, and a valve portion, which closes the discharge port. The valve plate includes an annular seal surface, recessed groove, receiving surface, and support surface. The seal surface contacts the valve portion around the discharge port. The recessed groove is arranged in the fixing surface outward from the seal surface. The receiving surface is flush with the fixing surface and contacts a distal region of the valve portion. The support surface is flush with the fixing surface and contacts a central region of the valve portion. | 03-28-2013 |
| 20130084201 | COMPRESSOR - A compressor valve structure permits improvement in durability and volumetric efficiency of a compressor and limits power losses. The width of the base portion of each suction reed valve is shorter than the width of the valve flap. The valve base plate has support portions, receiving portions, main coupling portions, and auxiliary coupling portions. Each support portion receives a central area of corresponding one of the valve flaps. The receiving portion receives a distal area of the valve flap. The main coupling portion extends from the support portion and couples the support portion to the receiving portion. The auxiliary coupling portion extends from the support portion. The suction ports are formed through the valve base plate, while leaving the support portions, the receiving portions, the main coupling portions, and the auxiliary coupling portions. | 04-04-2013 |
| 20130089445 | Variable-Displacement Compressor - In a swash plate type variable capacity compressor that changes a stroke of a piston by controlling the pressure of a crank chamber | 04-11-2013 |
| 20130108493 | VALVE PLATE FOR A COMPRESSOR | 05-02-2013 |
| 20130129546 | COMPRESSOR - A compressor includes a valve base plate, which is arranged between a suction chamber and a compression chamber and has a suction port. The valve base plate includes a sealing surface, a recessed groove, a receiving surface, and a support surface. The sealing surface is flush with a fixing surface and contacts the valve portion in an annular manner. The recessed groove is located at an outer side of the sealing surface and recessed with respect to the fixing surface. The recessed groove includes a bottom portion and separates an edge portion of the valve portion from the bottom portion. The receiving surface is flush with the fixing surface and capable of contacting a distal zone of the valve portion. The support surface is flush with the fixing surface and capable of contacting a middle zone located at an inner side of the sealing surface of the valve portion. | 05-23-2013 |
| 20130142684 | CHECK VALVE AND SOLVENT DELIVERY PUMP - A valve chamber is provided inside a valve element including a liquid inlet and a liquid outlet at positions facing each other. Inside the valve chamber, a ball is disposed to be movable in a direction of a straight line connecting the liquid inlet and the liquid outlet. A ball seat is fitted in the liquid inlet portion of the valve element. The ball seat includes a flow path forming the liquid inlet inside itself and allows the ball to be seated at an edge portion of the flow path. The ball seat is made of material having a hexagonal crystal structure and formed while controlling an orientation of a crystal axis so that a C axis which is the crystal axis of the material is oriented in the same direction as a central axis of the flow path forming the liquid inlet. | 06-06-2013 |
| 20130251565 | Poppet Valve Assembly, System, and Apparatus for Use in High Speed Compressor Applications - A miniature poppet valve assembly for a high-speed compressor, the miniature poppet valve assembly includes a plurality of miniature poppets, each characterized by a stem and a head with a maximum head diameter of no more than 0.9 inches; a cage having a plurality of counter bores disposed therein, each counter bore disposed for receipt of a poppet; and a seat plate overlying the cage, the seat plate including a plurality of through bores axially aligned with the counter bores of the cage. Each counter bore includes a chamfered edge against which the head of the poppet seats, thereby forming a seal. The chamfered edged is provided with a chamfer angle of approximately 30 degrees. In one embodiment, poppet heads have a convex head surface and are shaped so that the tangent angle at the point of contact between the edge and the head is approximately 30 degrees. | 09-26-2013 |
| 20130259723 | CHROMATOGRAPHY PUMP - The invention relates to a chromatography pump, comprising a cylinder ( | 10-03-2013 |
| 20140003986 | DISCHARGE VALVE FOR RECIPROCATING COMPRESSOR | 01-02-2014 |
| 20140030127 | VALVE, IN PARTICULAR AN OUTLET VALVE OF A HYDRAULIC PISTON PUMP - A valve, in particular an outlet valve of a hydraulic piston pump for delivering a fluid, includes a valve seat, a valve closing body, and a guide mechanism. A valve orifice is formed in the valve seat and has an inner wall. The valve closing body is arranged on the valve seat and is configured to selectively open and close the valve orifice. The guide mechanism is configured to guide the valve closing body relative to the valve seat and extends into the valve orifice. The guide mechanism has at least one fluid-conducting recess and at least one region configured to bear against the inner wall of the valve orifice to guide the valve closing body. | 01-30-2014 |
| 20140030128 | PISTON PUMP HAVING A CYLINDER BARREL - A piston pump for delivering fluids includes a piston configured to be driven to perform a reciprocating stroke movement. The piston pump includes a cylinder barrel in which the piston is held in an axially displaceable manner. The piston pump also includes a displacement chamber which is arranged in the cylinder barrel between an inlet valve and an outlet valve. The outlet valve is arranged on a cylinder barrel base, and, on a side of the cylinder barrel base which faces away from the displacement chamber, an annular projection is formed. The annular projection is configured to surround an installation space for the outlet valve. | 01-30-2014 |
| 20140044578 | POWDER PUMP FOR CONVEYING COATING POWDER - The invention relates to a powder pump ( | 02-13-2014 |
| 20140086773 | Hydraulic Radial-piston Pump for Wind Turbines - A hydraulic radial-piston pump transfers the wind energy of the rotor to an adjustable hydraulic motor on ground level, driving an electric generator with constant speed. The pump consists of piston assemblies, located in radial direction between camshaft and housing, supported by spherical bearings at the housing and cylindrical bearings at the camshaft, allowing for self-adjustment of the assemblies. The radial and axial bearings of the camshaft are pivotally mounted allowing for self-adjustment to the housing. At least two planes with cams opposing each other compensate the piston forces in radial direction. Preferably, the pump has four planes symmetrically arranged around a plane between the second and third plane, compensating the piston forces in axial direction. The center of gravity of the rotor is located between or near the bearings of the camshaft. The loads are supported by hydraulic pressure fields, minimizing frictional losses and increasing longevity. | 03-27-2014 |
| 20140086774 | FLUID END OF A HIGH PRESSURE PLUNGER PUMP HAVING A GROOVE ADAPTED TO RECEIVE A SPRING RETAINER OF A SUCTION VALVE - A fluid end of a plunger pump has a plunger bore, a discharge bore, a suction bore, a valve cover bore, and a cross-bore intersection formed in portions of the fluid end. The plunger bore, discharge bore, valve cover bore, and suction bore each having an opening which opens into the cross-bore intersection. A valve cover bore axis extends through the opening of the plunger bore which opens into the cross-bore intersection. A groove is formed in the fluid end. The groove traverses a curvilinear path around an open space. Long axes of the discharge bore and suction bore extend into said open space The groove has a first section and a second section. The first section has a first end with a first opening and a second end. The second section has a first end and a second end with an opening. A gap is between said first ends of said first and second sections of said groove. A gap is between said second ends of said first and second sections of said groove. A spring retainer is in the groove. | 03-27-2014 |
| 20140134026 | VALVE ARRANGEMENT FOR HERMETIC COMPRESSORS - The arrangement can be applied to a compressor which comprises a compression cylinder closed by a valve plate provided with seat regions and with respective suction orifice and discharge orifice which are closed by a sealing end portion of a respective valve vane, to be peripherally seated against its seat region. The valve plate carries a support means, defined in the central region of the contour of at least one of the suction orifice and discharge orifice and incorporated to the valve plate by at least one radial arm. The support means has a stop surface, against which is seated a central region of the sealing end portion of the respective vane, said stop surface defining a projection in relation to the radial arm. | 05-15-2014 |
| 20140134027 | INLET VALVE ARRANGEMENT FOR A FUEL PUMP - An inlet valve arrangement for a pump head of a fuel pump for use in a common rail fuel injection system comprises an inlet valve member moveable between open and closed positions to control the flow from a source of low-pressure fuel to a pumping chamber of the fuel pump. The inlet valve member is arranged to open in response to the pressure difference between the fluid pressure of fuel on an inlet side of the inlet valve member and the fluid pressure in the pumping chamber exceeding a threshold value. The inlet valve arrangement comprises means for selectively applying a closing force on the inlet valve member to bias it toward the closed position, such that, in use, the application of the closing force by said means acts to increase the threshold value of the pressure difference at which the inlet valve member opens. | 05-15-2014 |
| 20140170006 | RECIPROCATING COMPRESSOR WITH VAPOR INJECTION SYSTEM - A compressor assembly is provided and may include a compression cylinder and a compression piston disposed within the compression cylinder that compresses a vapor disposed within the compression cylinder from a suction pressure to a discharge pressure. The compressor assembly may additionally include a crankshaft that cycles the compression piston within the compression cylinder and an injection port in fluid communication with the compression cylinder that selectively communicates intermediate-pressure vapor at a pressure between the suction pressure vapor and the discharge pressure vapor to the compression cylinder. The injection port may communicate the intermediate-pressure vapor to the compression cylinder when the compression piston exposes the injection port and may be prevented from communicating the intermediate-pressure vapor to the compression cylinder when the compression piston blocks the injection port. | 06-19-2014 |
| 20140199195 | CYLINDER ASSEMBLY AND DISPENSER PUMP USING THE SAME - The cylinder assembly includes a first body, a second body and a coupling mechanism. The first body is of a tubular shape and has a valve set at a bottom end thereof. The valve set includes a valve, an elastomer and a passage. The second body has a ring with an outline fitting the valve. | 07-17-2014 |
| 20140294637 | COMPRESSOR - A compressor includes a housing, a cylinder block, a valve plate, a discharge valve forming plate and a retainer gasket. The discharge valve forming plate includes a discharge valve, a connecting portion and a discharge valve engaging portion. The discharge valve opens and closes the discharge port. A plurality of discharge valve support portions extends from the connecting portion to support the discharge valve. The discharge valve engaging portion extends from the connecting portion. The retainer gasket includes a retainer, a gasket and a retainer gasket engaging portion. The retainer restricts an opening and closing operation of the discharge valve. The gasket ensures airtightness between the housing and the cylinder block. The retainer gasket engaging portion is formed by bending a part of the retainer gasket. The discharge valve forming plate and the retainer gasket are positioned by connecting the discharge valve engaging portion and the retainer gasket engaging portion. | 10-02-2014 |
| 20140308144 | Pump - A manually operated pump for supplying air to a bicycle comprises an outer tube with one end closed and the other end open; a core tube which can slide in the outer tube and is provided with a piston assembly on one end; and a hose which can slide in the core tube. One end of the hose is connected with an air needle, and the other end is connected with an air nozzle assembly. The piston assembly comprises a piston, a piston ring, and a one-way valve communicating with the core tube and the outer tube. An end socket is provided on the other end of the core tube. A narrowing port is formed in the end socket of the core tube. A foot stand is hinged on outer side of the end socket of the core tube. The air needle has a head matching the narrowing port. | 10-16-2014 |
| 20140314604 | COMPRESSOR - In order to prevent the leakage of a gas from an internal space communicating with a compression chamber inside a cylinder in a cylinder head of a compressor, the compressor includes a suction valve pressing portion that presses a suction valve so that the suction valve provided in the internal space of the cylinder head does not slip off through a suction-side head opening, the suction valve pressing portion includes a suction valve pressing and inserting portion that is inserted into the cylinder head through the suction-side head opening, the outer peripheral surface of the suction valve pressing and inserting portion is provided with an annular suction valve pressing groove portion, a suction-side O-ring is attached into the suction valve pressing groove portion, and a suction-side backup ring that suppresses the movement of the suction-side O-ring toward the suction-side head opening is disposed at a position near the suction-side head opening of the suction-side O-ring inside the suction valve pressing groove portion. | 10-23-2014 |
| 20140334957 | PNEUMATIC RECIPROCATING FLUID PUMP WITH IMPROVED CHECK VALVE ASSEMBLY, AND RELATED METHODS - A pneumatic reciprocating fluid pump for pumping a fluid at least one check valve assembly that includes a check valve body insert, a ball within the valve body insert, and an annular sealing ring member disposed within a seat ring receptacle. The sealing ring member has dimensions smaller than corresponding dimensions of the seat ring receptacle, such that the sealing ring member is capable of moving within the seat ring receptacle. The ball is configured to slide back and forth between a first position and a second position within the check valve body insert responsive to forward and reverse flow of fluid therethrough. In one position, the ball is seated against the sealing ring member and prevents reverse flow of the fluid through the check valve assembly, and forward flow of the fluid through the check valve assembly is enabled when the ball is in another position. | 11-13-2014 |
| 20140348677 | Positive Displacement Pump and Suction Valve Module Therefor - A device for pumping a fluid comprises a suction valve module. In addition, the device comprises a discharge valve module. Further, the device comprises a fluid flow passage extending between the suction valve module and the discharge valve module. The suction valve module includes a valve housing block having a fluid inlet and a suction valve assembly disposed within the valve housing block. The suction valve assembly includes a moveable poppet element configured to reciprocate along a suction valve axis that is skewed relative to a central axis of the fluid inlet. | 11-27-2014 |
| 20140363324 | Piston Pump for a Vehicle Brake System - A piston pump for a vehicle brake system includes a piston which is mounted in a cylinder so as to be movable along an axis. An inlet valve for introduction of fluid into the cylinder, and a sealing element configured to seal off the piston with respect to the cylinder are located on the piston. A first portion of the piston includes a valve seat of the inlet valve, and a second portion of the piston includes a piston rod. The sealing element includes a projection which engages axially over the first piston portion and extends to the second piston portion. | 12-11-2014 |
| 20140369874 | ADJUSTABLE STOP FOR CHECK VALVE - A check valve comprises a housing, a fluid passage, a seat, a valve member and a stop. The fluid passage extends through the housing. The seat is disposed in the fluid passage. The valve member is positioned in the passage to engage the seat. The stop extends through the housing to engage the valve member. The stop is accessible from outside the housing to adjust a distance the valve member can travel from the seat. In one embodiment, the stop includes a variable stop feature, such as an offset pin or a cam. In another embodiment, the stop includes a pump control valve. In yet another embodiment, the housing includes markings to indicate a position of the stop. The valve member comprises a ball or a poppet in different embodiments. | 12-18-2014 |
| 20150030484 | MULTIPLE PARTS REED VALVE AND METHOD OF MANUFACTURING - An improved membrane valve and method for manufacturing such membrane valve. The improved membrane valve can be used for transferring fluids or gases in hermetic or semi-hermetic compressors, including a method and system for manufacturing a membrane valve and a membrane valve with applications for use in several motors, particularly in hermetic or semi-hermetic compressors which use, as a refrigeration fluid, an appropriate type of gas thus promoting the refrigeration physical affect. A body and a membrane of the membrane valve are produced from substantially thin metallic plates separately in accordance to an available process and can be subjected to rounding in order to eliminate live corners, and then juxtaposed thus composing the valve, with the above mentioned membrane on one side, fitted to the body which is fixed through a connection process and, on the other side, left free to oscillate. | 01-29-2015 |
| 20150044081 | AUTOMATIC VALVE WITH A SPRING HOLDER RING - An automatic valve including a valve seat having first gas flow passages extending there through and a valve guard having second gas flow passages extending there through. The valve further comprises at least one shutter member movably arranged between the valve guard and the valve seat, at least one set of spring members biasing the at least one shutter member towards a closed position in sealing engagement with the valve seat to close the first gas flow passages, and at least one spring holder ring provided with a plurality of spring retention seats. Each spring member of the set of spring members is partially housed in a respective spring pocket formed in the valve guard and retained in a respective one of the spring retention seat. | 02-12-2015 |
| 20150300339 | Pressure Relief Valve For Single Plunger Fuel Pump - A fuel pump including a low pressure infeed leading to a pumping chamber, a pumping plunger for pressurizing fuel in the pumping chamber, an outlet valve for delivering pressurized fuel from the pumping chamber to a high pressure outlet line during pumping, and an overpressure relief valve connected between the high pressure outlet line and the pumping chamber. A ball type relief valve element is spring biased to close against the relief valve seat. The spring is in a spring chamber that is fluidly isolated from the pumping chamber while the valve element is closed, preferably in direct hydraulic communication with the low pressure infeed, thereby reducing dead volume during normal pumping. The spring can act on the valve element through a piston, and in an alternative embodiment, the piston can provide a spill path from the pumping chamber to the low pressure infeed. | 10-22-2015 |
| 20150300351 | PUMP AND GAS BOOSTER USING SAME - Provided is a gas buster including: a pump including a cylinder part, a pump housing configured to be in communication with the cylinder part and having a first intake part and a first exhaust part, a piston reciprocably installed at the cylinder part to suck and exhaust water, a first check valve installed at the first intake part to be opened when the piston is moved backward and to be closed when the piston is moved forward, a second check valve installed at the first exhaust part to be opened when the piston is moved forward and to be closed when the piston is moved backward, and a gas supply part installed at the pump housing, and configured to supply a gas into an auxiliary cylinder part and thus to add the gas to the water pumped by the cylinder and the piston; a storage tank which is connected with the first exhaust part of the pump and in which the gas added to the fluid is separated and compressed; and a return pipe configured to connect the storage tank with the first intake part. | 10-22-2015 |
| 20160102661 | AIR COMPRESSOR - An improved air compressor includes a cylinder with a piston body and an air storage container. The air storage container can be detachably mounted to the cylinder to define a primary air chamber, and an auxiliary air chamber which can reduce the motion resistance of the piston body, so that the piston body can conduct reciprocating motion in the cylinder more smoothly. Furthermore, the cylinder has an open bottom that is divided into two halves according to a central vertical line (Y) of the cylinder, wherein one half of the open bottom is horizontal while the other half of the open bottom is slanted. When the piston body reaches the bottom dead center, the head of the piston body will be entirely within the cylinder and thus keep air-tight with the cylinder. Therefore, the performance of compressing air and the operational safety can be increased. | 04-14-2016 |
| 20160115953 | HIGH-PRESSURE PUMP - A high-pressure pump is comprised of a lower housing, an upper housing and a cover, which are formed independently from each other. Thereby, shapes of the above can be simplified. Although the cylinder and the plunger receive a fuel pressure during a pressurization stroke, the upper housing and the cover do not receive fuel pressure directly from a pressurization chamber. Therefore, the upper housing and the cover can be made thin and light as much as possible. | 04-28-2016 |
| 20170234307 | VOLUMETRIC PUMP WITH BLEED MECHANISM | 08-17-2017 |
