| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417521000 | Plural pumping chambers | 66 |
| 20080213114 | Pump - A pump comprising a guide ( | 09-04-2008 |
| 20080298991 | System and method for preloading a high stress area of a component - The exposure of components to high-pressure fluids can result in the application of high tensile stresses to those components, which may lead to reduced life. The preload system described herein helps to reduce the magnitude of those tensile stresses by providing a body and a plug. The body includes a first bore and a second bore. The first bore is configured to be exposed to high tensile stresses. The second bore includes a first engagement structure and a bottom surface near a first portion of the first bore. The plug includes a second engagement structure and a first end. The second engagement structure engages the first engagement structure to force the first end of the plug against the bottom surface of the bore. The force of the plug against the bottom surface of the bore applies a compressive preload to the first portion of the first bore. | 12-04-2008 |
| 20090028732 | PRESSURIZING DEVICE - A pressurizing device comprising a control mechanism ( | 01-29-2009 |
| 20090047159 | Multi-stage gas compressing apparatus - A compressed gas compressed by the first gas compressor is further compressed by the second gas compressor. The compressed gas from the first gas compressor is sent to a crank case of the second gas compressor in which the gas is further compressed. The gas is sent to a cylinder of the second gas compressor and compressed by a piston in the cylinder. | 02-19-2009 |
| 20090068040 | Five-bar compressor - The invention is a 180° reciprocating piston compressor comprising additional eccentric disc linkage between the crankpin and the connecting rod. The additional linkage lessens the compression above the piston during start-up and limits the electrical motor shaft load at design operating conditions lowering the starting current surge when bringing the system up to starting speeds. The additional disc eccentric linkage also lessens the torque load on the motor during motor normal operating speed. | 03-12-2009 |
| 20090092510 | Quintuplex Mud Pump - A quintuplex mud pump has a crankshaft supported in the pump by external main bearings. The crankshaft has five eccentric sheaves, two internal main bearing sheaves, and two bull gears. Each of the main bearing sheaves supports the crankshaft by a main bearing. One main bearing sheave is disposed between second and third eccentric sheaves, while the other main bearing sheave disposed between third and fourth eccentric sheaves. One bull gear is disposed between the first and second eccentric sheaves, while the second bull gear is disposed between fourth and fifth eccentric sheaves. A pinion shaft has pinion gears interfacing with the crankshaft's bull gears. Connecting rods on the eccentric sheaves use roller bearings and transfer rotational movement of the crankshaft to pistons of the pump's fluid assembly. | 04-09-2009 |
| 20090129958 | CYCLIC CONDENSATE PUMP HAVING A THREE-WAY VALVE - A condensate pump includes a condensate reservoir, a liquid level float sensor operable to sense a liquid level within the condensate reservoir, and a pressure/vent valve including a pressure source, a pressure vent, and a primary piston slidably supported in a primary cylinder and sliding in the primary cylinder responsive to the liquid level sensor. A secondary piston is slidably supported in a secondary cylinder and moves responsive to a movement of the primary piston between a first secondary-piston position wherein the pressure source is in communication with a gas space of the condensate reservoir and the pressure vent is isolated from the gas space, and a second secondary-piston position wherein the pressure source is isolated from the gas space and the pressure vent is in communication with the gas space. An aperture in the primary piston and passages may also be provided to prevent build-up of gas pressures and maintain pressures in preselected regions within the pump at atmospheric pressures. | 05-21-2009 |
| 20090196777 | Pump Having Adjustable Pumping Pressures - A pump having adjustable pumping pressures comprises a tube, a first and a second chamber and a channel extending from the first end to the second end of the tube, and an orifice extending through the tube and opening to the channel. A base connected to the second end of the tube includes a first passage opening to the first and second chambers and a second passage opening to the first passage and the channel. A switching device includes a rod disposed in the channel and a shaft received in the orifice for selectively moving the rod to a first position for permitting air through the second passage to the channel and a second position for preventing air through the second passage to the channel. | 08-06-2009 |
| 20090208355 | Radial piston fuel supply pump - A high pressure radial piston fuel pump is featured having an hydraulic head with two individual radial pumping pistons and associated pumping chambers, annularly spaced around a cavity in the head where a rotating eccentric drive member with associated actuation ring are situated. A rolling interaction is provided between the actuation ring and the inner ends of the pistons for intermittent actuation. Relative rotation is provided between the actuation ring and the drive member. Each piston has a piston bore that has a centerline that intersects the actuation ring but is offset (X) from the drive axis as viewed in cross section perpendicularly to the drive axis and the piston bore centerlines are parallel to each other but offset (Y) from each other as viewed in longitudinal section along the drive axis. | 08-20-2009 |
| 20090220364 | Reciprocating-Piston Compressor Having Non-Contact Gap Seal - A reciprocating-piston compressor having at least two working cylinders arranged in series, along a cylinder axis is described. The compressor includes a piston in each of the cylinders, guided in an axially movable manner, and a common axially actuated piston rod of the pistons, extending through a passage opening in a partition between the at least two working cylinders. The at least two working cylinders are sealed off with respect to one another in a region of the common axially actuated piston rod, exclusively by a non-contact seal. The axial seal has an axial gap seal formed between a radially outer circumferential surface of the common axially actuated piston rod and a radially inner circumferential surface of the passage opening. | 09-03-2009 |
| 20090257896 | ALTERNATIVE METHODS TO GENERATE HIGH PRESSURE BY ITERATION IN A HIGH-PRESSURE MULTICHAMBER - A multistage ultra high pressure multichamber, have among which stages can be included pumps. A chamber has another chamber inside which also contain a pump or a pumping system towards the inside, where a third chamber is considered with its pumping system towards its interior successively the device is useful in making of ultra high pressure sinterized material parts, manufacture of parts made of new materials like synthetic diamond, manufacture of material for pharmaceutical products and hydrowasher using this new technique to increase its pressure. | 10-15-2009 |
| 20090269230 | PISTON PUMP WITH AT LEAST ONE PISTON ELEMENT - A piston pump having at least one piston drivable by a drive unit and is longitudinally movable in a housing and having a first pressure chamber delimited by the piston element and at least one component affixed to the housing. The first pressure chamber is connectable to a suction region via an inlet valve and is operationally connectable to a delivery side via an outlet valve. A compensation piston unit drivable by the drive unit has a working piston chamber connected to the delivery side. A stroke volume of the first pressure chamber is twice the size of a stroke volume of the working piston chamber. The piston element and at least one component affixed to the housing delimit a second pressure chamber which is connected to the suction region which is operationally connected to the first pressure chamber during a suction stroke of the piston element whose volume varies by half the stroke volume of the first pressure chamber as a function of a movement of the piston element and whose volume expands with a delivery stroke of the piston element that decreases the volume of the first pressure chamber. | 10-29-2009 |
| 20100008803 | HIGH-PRESSURE SMALL VOLUME PUMP - An improved high-pressure pump ( | 01-14-2010 |
| 20100119393 | HYDRAULIC PUMP ASSEMBLY - A hydraulic pump assembly including a fluid reservoir, a body defining a fluid inlet and a fluid outlet, the fluid inlet being in fluid communication with the fluid reservoir, and a radially opposed piston pump assembly at least partially housed within the body and including a first piston pump mechanism and a second piston pump mechanism, the first piston pump mechanism being in fluid communication with the fluid inlet and having a first pump outlet, the second piston pump mechanism being in fluid communication with the fluid inlet and having a second pump outlet, wherein the first pump outlet and the second pump outlet are both in fluid communication with the fluid outlet. | 05-13-2010 |
| 20100129249 | FRAME FOR FLUID MACHINES - Herein described is a frame ( | 05-27-2010 |
| 20100135834 | DOUBLE-PISTON MECHANISM OF AN EMULSION SQUEEZE HEAD - The present invention provides a double-piston mechanism of an emulsion squeeze head, having an actuating syringe and a suction pipe. A top of the suction pipe is connected to a pressing head, while an elastic resetter is arranged between the bottom of the suction pipe and the bottom wall of the actuating groove. The suction pipe is also provided with a piston set. The piston set includes a first piston, with a first connecting portion and a first flange, and a second piston. The first connecting portion is assembled onto the suction pipe, and the first flange is abutted on the wall of the actuating groove. The second piston, placed at one end of the first piston, includes a second connecting portion and a second flange. The second connecting portion is assembled onto the first piston, and the second flange is abutted on the wall of the actuating groove. | 06-03-2010 |
| 20100158727 | Suction Port Lock Nut With Stub Buttress Threads - A reciprocating pump assembly having a block body, a cylinder chamber in the block body, a plunger reciprocatingly disposed in the block body, an opening in the block body adjacent the cylinder chamber, and a cover plate in the opening. Threads on the outer periphery of the cover plate engage threads formed within the opening. The threaded outer periphery of the cover plate extends into the cylinder chamber and past the threaded portion of the opening so that the load on the cover plate transfers from fully formed threads on the cover plate to threads formed on the opening. | 06-24-2010 |
| 20100278669 | PUMP SYSTEM FOR CONVEYING A FIRST FLUID USING A SECOND FLUID - The invention relates to a pump system for conveying a first fluid using a second fluid, said system comprising at least a first pump, said first pump comprising at least a first rigid outer casing defining a first interior space, a first flexible tube structure accommodated in the first interior space, wherein the interior of the first flexible tube structure is arranged for receiving one of said first or second fluids, wherein the region of the first interior space surrounding the first flexible tube structure is arranged for receiving said other of said first and second fluids, and wherein the first flexible tube structure is movable between laterally expanded and collapsed conditions for varying the volume of the interior of the first flexible tube structure, thereby imparting sequential discharge and intake strokes on said first fluid. | 11-04-2010 |
| 20110081268 | PUMP BODY - A multiplex fluid pump assembled from a plurality of pump bodies connected side by side between opposing end plates with a plurality of fasteners tightened to compress the pump bodies between the end plates. Raised surfaces on opposite exterior side surfaces of each pump body are engaged with an adjacent end plate or an adjacent pump body to apply a pre-compressive force at the raised surfaces and thereby inhibit the initiation of fatigue cracks. | 04-07-2011 |
| 20110142701 | Pump with a Sculptured Fluid End Housing - This invention relates to a method of fabricating or machining the fluid end of a high pressure pump and a fluid end produced by the method. The method includes sculpturing the front side of the fluid end which results in a non-planar surface. In this manner the internal stresses can be varied at critical points within the fluid end. | 06-16-2011 |
| 20120003111 | MECHANICAL SYSTEM FOR MOVEMENT ALONG A HOUSING AXIS - A mechanism for moving elements in a fluid filled housing a pump with the element to be moved attached rigidly to the pump or to a port assembly connected to the pump. The pump assembly or port assembly moves as a result of differential pressure created between a first and a second chamber separated from each other by the pump assembly or port assembly. Movement of the fluid in one direction increases or decreases pressure, the pressure change resulting in a net force in one direction or the other. | 01-05-2012 |
| 20120148430 | PUMP ASSEMBLY - A pump assembly having a power end and a fluid end, wherein the fluid end includes a plurality of pump bodies connected side by side between opposing end plates with a plurality of fasteners tightened to compress the pump bodies between the end plates. The power end and at least one of the plurality of pump bodies being connected together by a tie rod having a rod portion and a sleeve portion, wherein the sleeve portion surrounds the rod portion and abuts the power end at an end and at least one of the pump bodies of the fluid end at an opposite end. | 06-14-2012 |
| 20120207633 | Lubricating Pump and Method for Supplying Lubricant - The invention relates to a lubricating pump which contains screw pistons of which one is in compression operation and the other is in suction operation in alternation. The invention further relates to a method for supplying lubricant, wherein a first screw piston is in a suction operation while a second screw piston is in a compression operation and vice versa, and wherein the two screw pistons are driven by means of a common gear train, which contains one piston gear for each screw piston. | 08-16-2012 |
| 20130078125 | AIR OPERATED DOUBLE DIAPHRAGM PUMP - A double diaphragm pump is provided. The pump includes an inlet manifold, an outlet manifold, an air valve housing, first and second diaphragm housings, and a collar. The inlet manifold has at least one passageway configured to direct fluid from an inlet port on the inlet manifold. The outlet manifold has at least one passageway configured to direct fluid to an outlet port on the outlet manifold. Each of the housings is in selective fluid communication with the inlet and outlet manifolds. The collar is configured to be rotatably attached to the inlet manifold and the pump. | 03-28-2013 |
| 20130101453 | Compact Manual Pump Having Selectable Low Pressure and High Pressure Pumping Modes - A compact manual pump includes a body, a valve assembly connected with the body, and a first cylinder assembly rotatable with respect to the body. The body includes first and second collect inlets, and an exhaust outlet. The first cylinder assembly includes a seat, first and second inflating inlets. While the first cylinder assembly is rotated to switch to low pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the second collect inlet and the exhaust outlet is blocked by the seat. While the first cylinder assembly is rotated to switch to high pressure pumping mode, the first inflating inlet is connected with the first collect inlet and the second inflating inlet is connected with the exhaust outlet and the second collect inlet is blocked by the seat. | 04-25-2013 |
| 20130121862 | ALTERNATIVE METHODS TO GENERATE HIGH PRESSURE BY ITERATION IN A HIGH-PRESSURE MULTICHAMBER - A multistage ultra high pressure multichamber, have among which stages can be included pumps. A chamber has another chamber inside which also contain a pump or a pumping system towards the inside, where a third chamber is considered with its pumping system towards its interior successively the device is useful in making of ultra high pressure sinterized material parts, manufacture of parts made of new materials like synthetic diamond, manufacture of material for pharmaceutical products and hydrowasher using this new technique to increase its pressure. | 05-16-2013 |
| 20130195700 | PRESSURIZING PUMP STRUCTURE - A pressurizing pump structure includes a cover, a flow guide, a pump and a main axle. The flow guide is interposed between the cover and the pump. The main axle is mounted inside the pump. The pump has several pressurizing chambers, each of which has one or more pressurizing tanks. Each of the pressurizing tanks has a piston. The main axle has an eccentric part going into the pump for driving the pistons in the pressurizing tanks to make reciprocal motions as the main axle rotates, thereby outputting fluid with a higher pressure. | 08-01-2013 |
| 20130195701 | Pump Fluid End with Integrated Web Portion - A fluid end block for attachment to a power end of a high pressure reciprocating pump includes a main body portion having an outwardly facing body forward face, an outwardly facing body rear face opposite the body forward face, and opposing side surfaces. A web portion protrudes outwardly from the outwardly facing body forward face. The web portion may have an outwardly facing web forward face and a curvilinear side surface. The web portion may be integral with the main body portion. A plurality of bosses protrude from the web forward face and having a forward facing end. The plurality of bosses may be integral with the main body portion and the web portion. A plunger bore extends through one of the plurality of bosses configured to receive a reciprocating plunger. | 08-01-2013 |
| 20140079580 | Pump Unit For Water Jet Surgery - The pump unit according to the invention encompasses at least two piston pumps, which include pump cylinders and pump pistons. Each piston pump comprises at least one inlet valve and an outlet valve. At least the inlet valves, but optionally also the outlet valves, are embodied as springless ball check valves, in the case of which the valve ball is located in an interior, which is defined by a surface of the housing (preferably of the first housing part | 03-20-2014 |
| 20140119965 | DOWNHOLE PUMP ASSEMBLY - The invention pertains to oil production pumping equipment in particular to submersible downhole pumps with rod drives to simultaneously and separately lift reservoir fluids to the surface from two reservoirs of a single well. The downhole pump assembly comprises a drive, upper and lower oil-well sucker-rod pumps each connected with its own rod string. In addition to this the unit is equipped with the body, crossbar and joint hollow rod string the latter being attached to the upper part of the crossbar to the bottom of which the rod strings of the upper and lower oil-well sucker-rod pumps are fixed, moreover, the rod string of the upper oil-well sucker-rod pump being made hollow and interconnected with the hollow plunger of the upper oil-well sucker-rod pump and the channel in the crossbar with the joint hollow rod string, and the rod string of the lower oil-well sucker-rod pump is installed between the cylinder of the upper oil-well sucker-rod pump and the downhole pump assembly body, moreover, the upper oil-well sucker-rod pump being offset from the longitudinal downhole pump assembly body axis. Coaxiality of the lower oil-well sucker-rod pump is achieved through the use of the rod crossover shoe, S-shaped rod and non-central pipe sub. The lower plunger pump rod has a shaped cross-section. As a result a standard pumping unit and two oil-well sucker-rod pumps are used and both enhanced reliability of the downhole pump assembly and increased overhaul life of its operation are achieved. | 05-01-2014 |
| 20140147319 | FRAME FOR FLUID MACHINES - Herein described is a frame for a fluid machine of the reciprocating type. The frame bears one or more cylinders moving inside each of which, with a reciprocating movement, is a piston operated by a crankshaft. The frame is made up of one or more modules of the same size and shape, within each one of the modules being provided a single chamber adapted to accommodate the crank mechanisms of each single cylinder. Each module is further provided with a pair of opposite side walls and with one or more fixing means which allow rigid coupling to each other, adjacently arranging their respective side walls, of two or more of the identical modules for providing a frame for fluid machines provided with two or more cylinders. | 05-29-2014 |
| 20140294635 | NATURAL GAS COMPRESSOR WITH SCISSOR DRIVE ASSEMBLY - A positive displacement reciprocating compressor for compression of natural gas. The compressor includes at least one pair of coaxial bulkheads, each bulkhead having a gas cylinder coupled thereto, and one or more a scissor drive assemblies for driving piston rams into and out of the gas cylinders to compress gas. The scissor drive assembly of the compressor includes one or more piston rams having a piston head attached thereto and movable into and out of each gas cylinder via reciprocating movement of a linkage arm assembly, coupling the piston rams to a rotatable drive shaft. The compressor can be used for compressing natural gas for use as a fuel for vehicles, appliances, generators, or the like. | 10-02-2014 |
| 20140294636 | RECIPROCATING COMPRESSOR - A reciprocating compressor including a casing which has first and second cylinders, an electric motor which has a drive shaft mounted in the casing, first and second pistons fittingly inserted into the first and second cylinders respectively, so as to reciprocate therein, and first and second connecting rods attached to the first and second pistons, respectively, at ends thereof and which are situated in the crank chamber at the other ends thereof where first and second bearings are provided, respectively. A crank member is provided on the drive shaft within the crank chamber, and the crank member is fittingly inserted into the first bearing of the first connecting rod and the second bearing of the second connecting rod. The crank member has a positioning member which positions the first and second bearings with respect to an axial direction. | 10-02-2014 |
| 20150139838 | ATOMIZER - An atomizer includes a motor mounted in a housing. First and second cylinder units are received in the housing. The first cylinder unit includes a first piston and a first coupling bearing connected to the first piston. The second cylinder unit includes a second piston and a second coupling bearing connected to the second piston. An eccentric transmission shaft of the motor extends through the first and second coupling bearings of the first and second cylinder units. The first and second pistons of the first and second cylinder units move reciprocatingly when the motor operates. An intake check valve is mounted in an intake passage between an intake port of the first cylinder unit and an inlet of the housing. An outlet check valve is mounted in an outlet passage between an outlet port of the second cylinder unit and an outlet of the housing. | 05-21-2015 |
| 20150300330 | RECIPROCATING PUMPS FOR DOWNHOLE DELIQUIFICATION SYSTEMS AND PISTONS FOR RECIPROCATING PUMPS - A piston includes a piston housing and a decompression valve disposed in the piston housing. The decompression valve includes a valve housing seated in the piston housing and a valve member moveably received by the valve housing. The valve member has a radially outer surface including an annular shoulder. In addition, the piston includes an end cap secured to the first end of the piston housing. A radially inner surface of the end cap includes an annular valve seat. The decompression valve has a closed position with the annular shoulder of the valve member engaging the valve seat of the end cap and an open position with the annular shoulder of the valve member axially spaced from the valve seat of the end cap. The piston also includes a biasing member configured to bias the decompression valve to the closed position. | 10-22-2015 |
| 20150354557 | RECIPROCATING LOW-SPEED HEAVY-LOAD HYDRAULIC PUMP WITH VARIABLE ACTION AREA - A reciprocating low-speed heavy-load hydraulic pump with a variable action area comprises a plurality of hydraulic cylinder units ( | 12-10-2015 |
| 20160032913 | Reciprocating Compressor Frame - A reciprocating compressor barrel frame comprising a continuous curved wall having an inner surface and an outer surface. A housing is formed by the inner surface of the curved wall. A pair cross head shoe supports extend from the outer surface of said curved wall in opposite directions perpendicular to said housing. A plurality of bearing support members are disposed within the housing and supported by the curved wall. The bearing support members are arranged so as to support a crankshaft disposed within the housing. A base flange is connected to the curved wall and is operable to attach to a structure that will support the frame. | 02-04-2016 |
| 20160069340 | DUAL-CHAMBER DUAL-ACTION AIR PUMP AND GLASS-WIPING ROBOT HAVING THE AIR PUMP - A dual-chamber dual-action air pump and a glass-wiping robot having the air pump. The air pump comprises a cylinder and, connected to the cylinder, a drive apparatus and a piston. The drive apparatus drives the piston via a transmission apparatus to perform reciprocating movement in the cylinder. A sealing element fixedly connected to the piston rod is arranged within the cylinder. The sealing element partitions the cylinder into a first chamber (A | 03-10-2016 |
| 20160131116 | PUMP ARRANGEMENT - A pump arrangement ( | 05-12-2016 |
| 417522000 | Discharge conduit for first chamber communicates with nonpumping portion or second pumping member | 1 |
| 20120027633 | PISTON REFRIGERATION COMPRESSOR - This refrigeration compressor includes a plurality of compression units, each compression unit having a cylinder head including a refrigerant suction chamber and a refrigerant discharge chamber, a refrigerant distribution device having a distribution pipe and bypass pipes putting the distribution and the suction chambers of the compression units in communication, and a refrigerant discharge device having a discharge pipe and bypass pipes putting the discharge pipe and the discharge chambers of the compression units in communication. The compressor also includes a pressure equilibration means arranged to put the suction chambers of at least two compression units and/or the discharge chambers of at least two compression units in communication. | 02-02-2012 |
| 417523000 | Including valved piston | 2 |
| 20120034119 | Double Acting Fluid Pump - A double acting dual stroke fluid pump with pressure assists is disclosed. First and second pistons are mounted to a common shaft which reciprocates during compression and suction strokes. During each of the strokes, fluid is pumped out at an outlet. This is accomplished by way of a one-way valve on the second piston. The one-way valve is opened or closed depending on whether the first and second pistons are in the compression or suction strokes. Additionally, pressure from the outlet assists in traversing the first and second pistons in the compression stroke. During the suction stroke, the fluid pressure applies a force on the first piston to counteract the fluid pressure on the second piston so that a smaller spring may be used. The size requirements of the solenoid and spring are reduced. Additionally, the fluid pump provides lower pressure spikes compared to prior art fluid pumps since fluid is pumped out during both the compression and suction strokes and also provides a more even flow of fluid out of the fluid pump. | 02-09-2012 |
| 20130287615 | PRESSURE INTENSIFIER - A pressure intensifier including reciprocating pistons located in respective piston chambers, and a valve mechanism which reciprocates corresponding to movement of the pistons. A pressurized fluid is received by the intensifier and is routed to the piston chambers via movement of the valve mechanism to drive the pistons for boosting pressure of an outgoing fluid. Thus, the pressure of the incoming fluid is used to boost the pressure of the outgoing fluid. | 10-31-2013 |
| 417531000 | Unitary or interconnected elements form inlet or discharge distributors for plural chambers | 2 |
| 20090252628 | Sealing Rings for Abrasive Slurry Pumps - There are a number of applications today where the pumping of abrasive slurries is necessary. The pumping mechanisms, though, can be complex, employing multiple transfer cylinders and movable pipes. These designs have their problems, specifically wear between poorly sealing surfaces. To reduce this problem, seals are provided that have multiple wear surfaces which include harder tiles secured over a softer core to benefit from the relative hardness or flexibility of each of the respective materials. | 10-08-2009 |
| 20140127065 | SINGLE AND MULTI-CHAMBER WELLBORE PUMPS FOR FLUID LIFTING - A wellbore pump includes a pump housing suspendible in a wellbore at ends of at least one of a power fluid line and a fluid discharge line. The pump housing includes a fluid inlet proximate a bottom end thereof and wherein the fluid discharge line is coupled proximate a top end thereof. The pump include valves for directing flow of wellbore fluid out of the housing when power fluid displaces fluid in the housing, the valves for directing flow of wellbore fluid into the housing when power fluid pressure is relieved. | 05-08-2014 |
| 417533000 | Common discharge conduit interposed between spaced parallel chambers | 3 |
| 20140127066 | INLINE PUMP ASSEMBLY AND METHOD - A pump assembly and methods of use and conversion including a sealed housing, at least one in-tank, not sealed pump contained in the sealed housing, an outlet check valve inside each pump, and an over pressure relief passage formed around the pumps in the sealed housing. The pump assembly may also include a common fuel inlet, a common fuel outlet; at least two of the pumps, a compact design, a mounting bracket, a sealed electrical inlet, a pre filter, a post filter, a pressure regulator, a returnless fuel supply, a pressure regulator, a return line. | 05-08-2014 |
| 20150147210 | PULSATION-FREE POSITIVE DISPLACEMENT ROTARY PUMP - A pump having two pistons placed in a rotor, situated in a stator forming two opposite parallel eccentric pumping chambers having at least one inlet port through which the fluid is drawn into at least one of the pumping chambers during the filling movement of at least one of the pistons and, subsequently, expelled from at least one of the pumping chambers, during the emptying movement of at least one of the pistons, to at least one outlet port, characterized by an inlet cavity in connection with the inlet port, an outlet cavity in connection with the outlet port and two port changeover transition zones situated between each side of the cavities. | 05-28-2015 |
| 20150300332 | MANIFOLD INCLUDING MOUNTING PLATE FOR FLUID END BLOCK OF RECIPROCATING PUMP ASSEMBLY - In one aspect, a fluid end portion of a reciprocating pump assembly includes a fluid end block and an inlet manifold connected thereto. The manifold includes an opening formed therethrough and including a slot portion to facilitate the connection between the inlet manifold and the fluid end block. In another aspect, a method of connecting an inlet manifold to a fluid end block includes inserting fasteners into respective openings in the fluid end block, and effecting relative movement between the inlet manifold and the fluid end block so that the fasteners pass within respective slot portions formed through a mounting plate of the inlet manifold. In yet another aspect, a manifold is adapted to be connected to a fluid end block and includes an elongated member and a mounting plate connected thereto. The mounting plate includes openings formed therethrough, the openings including respective slot portions spaced in a parallel relation. | 10-22-2015 |
| 417534000 | Chambers formed at opposite ends of rectilinearly moving pumping member | 9 |
| 20090097999 | Suction structure in double-headed piston type compressor - A suction structure is provided for allowing refrigerant into first and second compression chambers from a suction pressure region through first and second rotary valves and first and second communication passages in a double-headed piston type compressor. The first and the second rotary valves respectively have first and second introduction passages. The distance to the first communication passage from the suction pressure region through the first introduction passage is greater than the distance to the second communication passage from the suction pressure region through the second introduction passage. The first communication passage with a circular cross-section in the cylinder block connects the first compression chamber to the first introduction passage. The second communication passage with a circular cross-section in the cylinder block connects the second compression chamber to the second introduction passage. The diameter of the first communication passage is greater than the diameter of the second communication passage. | 04-16-2009 |
| 20110293455 | BALL VALVE DEVICE AND METHOD FOR FORMING A BALL RETAINER IN A CHECK VALVE - The ball valve device comprises a tubular body in metal material, having a cylindrical wall conformed with spherical cup-shaped internal protrusions to retain a ball shaped valving member, preventing the same valving member from being entrained by a fluid flowing through the valve device. The internal spherical protrusions are formed by radially pressing and crimping the cylindrical wall of the tubular body at one or more angularly spaced apart deformable areas of an annular strip. The tubular body provided with the ball retaining protrusions is suitable for any valve device, such as ball check valves, pumping units, and/or ducts. | 12-01-2011 |
| 20130195702 | DOUBLE-ACTION SUCKER-ROD WELL PUMP - A pump includes a two-stepped cylinder with cavities and a lower intake valve, and is connected to a tubing-string via a sub, which includes an upper intake valve and discharge valve. A hollow plunger is arranged in the cylinder below and above the cavities. The plunger is connected to a hollow rod and has a lower discharge valve and a through-hole provided above the lower discharge valve to provide communication between the plunger cavity and a chamber formed as said plunger is moved downwards in a lower step of the cylinder. An upper step of the cylinder includes an inner diameter which is smaller than the inner diameter of the tubing-string. The upper discharge valve is a bush arranged on the rod with longitudinal movement upwards along said rod with excess pressure in the cylinder cavity above the plunger, and downward movement in the liquid under its own weight. | 08-01-2013 |
| 20140056744 | VALVE AND DIAPHRAGM FOR A PUMP - A diaphragm pump ( | 02-27-2014 |
| 20140301875 | METERING PUMP - The invention relates to a metering pump for a metering device for metered dispensing of a liquid, which can be connected to a storage container, comprising a cylindrical pump body and an actuation body. | 10-09-2014 |
| 20150139839 | PORTABLE, REFRIGERANT RECOVERY UNIT - A portable, refrigerant recovery unit for transferring refrigerant from a refrigeration system to a storage tank. The recovery unit includes two, opposed piston heads rigidly attached to respective piston rods that extend along a common fixed axis. The piston rods are rigidly attached to the yoke member of a scotch yoke arrangement. In operation, incoming refrigerant from the system is simultaneously and continuously directed to the opposing piston heads wherein the forces of the pressurized refrigerant on them counterbalance or neutralize one another. The recovery unit also has a cooling fan driven by the motor for driving the scotch yoke in which the fan is driven through a step up gearing arrangement. In operation, the drive shaft of the motor is rotated at a first rate and the driven shaft of the fan is driven at a greater rate (e.g., twice the first rate) by the step up gearing arrangement. | 05-21-2015 |
| 417535000 | All discharge distributors positioned laterally of pumping member path | 3 |
| 20090016916 | BIDIRECTIONAL PISTON PUMP - A two-way mechanical pump for a steam appliance having a main body having a boiler with a water inlet and a steam outlet positioned therein in provided. The bidirectional pump on two-way piston pump in accordance with the invention includes a cylinder separated into two chambers by a piston coupled to a piston rod or appliance handle. An inlet having a one-way valve and an outlet having a one-way valve are connected to each change. Movement of the piston from the first end of the cylinder to the second end expels liquid out of the second end and outlet and draws water into the first chamber through the first inlet and one-way valve and movement of the piston towards the first and expels water out of the first chamber and outlet through the first outlet valve and draws water into the second chamber through the second inlet and inlet valve. | 01-15-2009 |
| 417536000 | Inlet and discharge distributors positioned laterally of pumping member path | 2 |
| 20150330384 | DERRICK-TYPE LONG-STROKE HYDRAULIC PUMPING UNIT - Disclosed is a derrick-type long-stroke hydraulic pumping unit, comprising: a rack, a counterweight basket, a sucker rod side oil cylinder, a counterweight basket side oil cylinder, a hydraulic station, and an oxbow component, characterized in that, the sucker rod side oil cylinder and the counterweight basket side oil cylinder each include a cylinder barrier, a cylinder shell is disposed outside the cylinder barrel and is a double layered cylinder shell, a piston and a piston rod are disposed inside the cylinder barrel, multiple annual oil grooves are formed on the piston rod, a cylinder cap component includes a cylinder cap body, a pressing sleeve mechanism is disposed on an upper part of the cylinder cap body, an oil scraping mechanism is disposed between the cylinder cap body and the pressing sleeve mechanism, the pressing sleeve mechanism includes a pressing sleeve, a dust sleeve is embedded inside the pressing sleeve, a dust sleeve gland is disposed on an upper part of the dust sleeve, and the oil scraping mechanism includes a felt groove, a felt pad, and a pressure plate disposed on an upper part of the felt groove. The present invention has the advantages of a reasonable structure, a long service life, high work efficiency, and resource saving. | 11-19-2015 |
| 417537000 | All distributors positioned on same side of pumping chamber | 1 |
| 20140369873 | Compressor for Pressurized Fluid Output - A compressor moves a fluid from an inlet to an outlet and provides a pressure differential there between due to respective pistons moving in and out of a plurality of piston chambers via a piston rod. A rotating shaft extends through a grooved end plate, and the rotating shaft is connected to either the grooved end plate or the piston rod. The grooved end plate defines an off center or eccentric groove. A bearing extends from the piston rod and fits within the groove such that when the rotational motion of the shaft rotates either the piston rod or the grooved end plate, the piston rod slides back and forth relative to the rotating shaft. Each position of the bearing within the groove determines a corresponding position of the piston rod relative to the rotating shaft. Each pair of pistons may extend from a single, continuous piston rod. | 12-18-2014 |
| 417538000 | Inlet and discharge distributors at adjacent end of aligned chambers | 1 |
| 20150110656 | HYDRAULIC PISTON PUMP HAVING DISTRIBUTION THROUGH A BI-DIRECTIONAL PORT PLATE - A hydraulic pump having a plurality of pistons sliding in bores formed in a barrel mounted in rotation in a casing of the pump, the barrel bearing against a distribution port plate borne by a cylinder head. Two drainage channels place an inner space of the casing in respective communication with two suction/delivery orifices of the cylinder head. Each drainage channel is provided with a valve able to close the drainage channel in response to an overpressure in the suction/delivery orifice such that, according to the direction of rotation of the pump, the inner space of the casing is in communication through one of the drainage channels with the suction line; whereas the communication through the other drainage channel between the delivery side and the inner space of the casing is closed. | 04-23-2015 |
| 417539000 | Parallel laterally spaced relatively movable pumping members | 9 |
| 20080232988 | Material Pump - A composite pump comprises multiple fluid pumps, each including a movable component and a crank coupled to the movable component. At least two of the movable components define between them a non-zero included angle. | 09-25-2008 |
| 20090016917 | Compact Dual Rocking Piston Pump with Reduced Number of Parts - A dual rocking piston pump is disclosed which includes a first piston with a first connecting rod eccentrically mounted to a rotor shaft and a second piston with a second connecting rod eccentrically mounted to the rotor shaft. The rotor shaft passes through a first bearing and a second bearing before being connected to a rotor body. The rotor body is disposed within a stator. The first and second bearings and stator are supported by a bracket. The bracket includes a hub which, in turn includes a first end connected to a wall at an opening in the wall. The hub also includes a second end. The first end of the hub supports the first bearing at the wall and the second end of the hub supports the second bearing. Both the first and second bearings are disposed to “in front” of the motor or in front of both the rotor and stator. Because support for the rotor is provided entirely in front of the motor, no rear bell housing is required and because a single bracket supports the bearings, rotor and stator, fewer parts are required thereby making the pump lighter and more compact. | 01-15-2009 |
| 20090092511 | HEART-SHAPED CAM CONSTANT FLOW PUMP - A constant flow pump and method of providing a constant fluid flow using such a pump, and more particularly a pump and method that maintain a constant flow by using a heart-shaped cam to directly reciprocate the pistons of the pump at a constant velocity are described. The pump operates by using heart-shaped cam to translate the rotational motion of a power source such as an engine or motor can into a constant speed linear motion. | 04-09-2009 |
| 20140093411 | Wobble Drive Mechanism - A wobble drive mechanism for coupling a rotary motion to a reciprocating motion comprising a diagonal plate coupled to a rotary motion axis driving a wobble carrier having a flat side in sliding contact with the diagonal plate and a spherical side in contact with a spherical bearing recess. The wobble carrier has a bore containing at least one reciprocating drive shoe. The reciprocating drive shoe may be coupled to a piston operating within a cylinder. The reciprocating drive shoe may be free to move in the bore linearly and/or rotationally. In various embodiments, the reciprocating drive shoe comprises two or more components. In various embodiments the piston is coupled to the shoe via a fixed rod section and the fixed rod section terminates in, for example, a double cylindrical bearing T section or a spherical bearing. The reciprocating drive may operate various devices, for example, pump or motor devices. | 04-03-2014 |
| 20140170005 | LIQUID SUPPLY APPARATUS - In a liquid supply apparatus, plungers which respectively expand and contract pump chambers are reciprocated linearly in an axial direction with their phases shifted to each other, thereby continuously discharging liquid. In a pump block, drive rods are mounted so as to be reciprocatable in an axial direction. At a center in an axial direction of shafts attached to the drive rods, drive rollers are mounted, and rollers are mounted at both ends of the shafts. Guide grooves which support the guide rollers are formed in guide blocks. | 06-19-2014 |
| 20140241925 | SWASH PLATE COMPRESSOR - A swash plate type compressor includes a drive shaft, a swash plate, a piston, a cylinder block, a housing, a cylinder bore, a compression chamber, suction and discharge chambers and first and second thrust bearings. The cylinder bore is formed in the cylinder block and receiving therein the piston engaged with the swash plate mounted on the drive shaft. The compression chamber is defined in the cylinder bore by the piston so as to be communicable with the suction and the discharge chambers formed in the housing. The first and the second thrust bearings are disposed on opposite sides of the swash plate. The drive shaft extends through the cylinder block and supported in a thrust direction by the first and the second thrust bearings, and either one of the first and the second thrust bearings is disposed outside the cylinder block and between the housing and the drive shaft. | 08-28-2014 |
| 20140341766 | COMPRESSOR - A compressor has therein a suction chamber into which refrigerant gas is introduced, a compression chamber in which the refrigerant gas in the suction chamber is introduced and compressed, and a discharge chamber into which the compressed refrigerant gas is discharged from the compression chamber. The suction chamber and the discharge chamber are formed adjacent to each other while being separated by a partition wall. At least one surface of the partition wall is provided with a thermal insulator which is formed by curing a thermal insulation coating composition. The thermal insulator includes hollow beads and one or more binder resin selected from the group consisting of epoxy resin, polyamide-imide resin, phenolic resin, and polyimide resin. | 11-20-2014 |
| 20150030483 | PUMP UNIT OF ELECTRONIC CONTROL BRAKE SYSTEM - Disclosed is a pump unit of an electronic control brake system installed in a bore formed in a modulator block, the pump unit including a motor having a rotating shaft, a carrier having a center portion thereof installed on the rotating shaft, and provided with connecting shafts that are spaced apart from the center portion to both sides by a predetermined interval to be disposed in line with each other, a pressing member installed on each of the connecting shafts, and a first piston pump and a second piston pump each provided with a piston configured to be reciprocated by making contact with an outer circumferential surface of the pressing member according to rotation of the carrier, the first piston pump and the second piston pump disposed in line with each other. | 01-29-2015 |
| 20150086402 | PUMP DEVICE - A pump device ( | 03-26-2015 |
