Double Acting Pump Piston Patents (Class 417/404)
  • Patent number: 4390322
    Abstract: A double acting multistage hydraulically driven gas compressor using a free floating piston including a hydraulic piston and a number of gas compressing pistons, those gas compressing pistons being sealed by high pressure oil supplied from the hydraulic drive stage.
    Type: Grant
    Filed: February 10, 1981
    Date of Patent: June 28, 1983
    Inventor: Tadeusz Budzich
  • Patent number: 4378047
    Abstract: In situ (subsurface) methods and devices are described for releasing gaseous hydrocarbons and steam from solution in water or brine, from captured bubbles in formation pores, and from hydrate deposits. With geopressured brines the volume of the brine is reduced so that its volume is less than the sandstone pore volume which holds the brine; at this point the reservoir creates a gas cap of methane and steam which can be produced. Gas caps are formed in natural domes, artificial domes are developed, down-hole engines and pumps are powered both by in situ forces and by surface-generated forces; all are described.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: March 29, 1983
    Inventors: Guy R. B. Elliott, Nicholas E. Vanderborgh, Milton W. McDaniel
  • Patent number: 4350022
    Abstract: A refrigerant transfer system is provided embodying a pump for controlling the level of liquid refrigerant within a suction header of an evaporator unit. The pump includes a pair of elongated chambers in endwise relation. One chamber has a substantially greater cross-sectional area than the second chamber. Opposite ends of each chamber have port means. A first set of inlet and outlet valve means is connected to the port means at each end of said one chamber. Each inlet valve means is alternately connected to a source of pressurized fluid. A second set of inlet and outlet valve means is connected to the port means at each end of the second chamber. Each inlet valve means of the second set communicates with a lower portion of the evaporator suction header. The heads of a double-headed piston are disposed within the chambers. Control means are operatively connected to the first set of inlet valve means for controlling the direction of movement of the piston heads within the chambers.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: September 21, 1982
    Assignee: Crepaco, Inc.
    Inventors: Paul J. Kristapovich, Milton E. Knapp
  • Patent number: 4334833
    Abstract: A four-stage gas compressor including: a double-acting piston operable by pressurized oil and provided with first and second hollow opposed piston rods the first of which is connected to a first-stage piston and the second of which is connected to a second-stage piston; said first and second-stage pistons being arranged to slide in first and second jackets respectively and being a sliding fit upon first and second cylindrical bodies respectively; said first and second cylindrical bodies respectively being fixed to first and second opposed heads; a first axial suction and delivery duct leading to an end face of said first cylindrical body, a third stage chamber being defined between said end face and one face of the double-acting piston; and a second axial suction and delivery duct leading to an end face of said second cylindrical body, a fourth stage chamber being defined between said end face of said second cylindrical body and the other face of the double-acting piston.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: June 15, 1982
    Inventor: Antonio Gozzi
  • Patent number: 4304529
    Abstract: A metering system for delivering and metering two combinable and cooperatable liquids, in predetermined ratios in order to enable ultimate combining of such liquids or the fluids. The apparatus comprises a first discrete valve mechanism which is capable of receiving a first fluid from a source and a cooperating first discrete metering mechanism; a pumping mechanism for receiving the fluid from and directing fluid to this first valve mechanism. The apparatus also comprises a second discrete valve mechanism capable of receiving a second fluid from a source and an associated second discrete metering mechanism; a pumping mechanism for receiving fluid from and directing fluid to this valve mechanism. An actuating device operatively connects the first and second valve mechanisms and the first and second metering mechanisms in order to enable the first metering mechanism to pump the first fluid to and from the first valve mechanism and the second fluid to and from the second valve mechanism.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: December 8, 1981
    Inventor: Horst Gerich
  • Patent number: 4286929
    Abstract: A cylindrical shell with a double acting piston, having a high pressure area and a low pressure area on each side thereof, is provided with a valve for alternately injecting high pressure gas to each small area to provide an initial piston drive, and valving for injecting gas under the pressure, opposite from the first high pressure end to the opposite larger area providing a secondary piston drive using expansion of the high pressure expanded gas from the opposite end of the piston. In reversing the piston, the opposite end becomes the drive end in the same manner. In one form, a two position slide valve, initially actuated by piston movement and completed by gas pressure movement, provides a transfer means for gas streams internally of the motor and for exhaust of the secondary expanded gas. The valve is arranged for an initial mechanical movement from one position toward the other position by contact with the end wall of the low pressure cylinder and then completely moved to other position by gas pressure.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: September 1, 1981
    Assignee: Rodney T. Heath
    Inventors: Rodney T. Heath, C. Richard Gerlach
  • Patent number: 4268227
    Abstract: A downhole, hydraulically-actuated pump of the free type which is sealingly received within a cavity in such a manner that a plurality of spaced-apart annular chambers are formed. The chambers are used in conjunction with other passageways to control flow of fluid to and from the pump and the surface of the ground. This flow system provides a closed circuit for the power fluid going to and from the engine. The power fluid to the engine end flows down the tubing string within which the pump assembly is located and to which the cavity is connected. A second conduit conducts spent power fluid from the pump assembly back uphole to the surface of the ground, thereby providing a closed circuit for the flow of power fluid to and from the pump assembly. A third conduit extends from the cavity, back up to the surface of the ground, so that produced fluid from the pump end is forced to the surface of the ground.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: May 19, 1981
    Inventor: George K. Roeder
  • Patent number: 4242057
    Abstract: A diverse fluid pump assembly including a pair of parallel, reciprocating piston-cylinder, motor-pump combinations. The motor-pump combinations are oppositely arranged so that one is pumping while the other is charging. Motor reversal is accomplished through a unique, hydraulically actuated spool valve which is slaved to the common piston rods of the respective, tandem motor-pump combinations. The invention is intended for use primarily as a mud pump for oil well servicing or drilling rigs. Principal components are easily broken down for replacement because of wear and/or size considerations. In a preferred embodiment, the hydraulically actuated spool valve is hydraulically slaved to the motors to effect motor reversal. A unique floating stuffing box is provided on the motor side of each combination which accomodates lateral rod shifting while maintaining a fluid tight seal. The spool valve operates smoothly through five distinct stages during motor reversal thus eliminating any need for a pulsation dampener.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: December 30, 1980
    Inventor: Emil A. Bender
  • Patent number: 4229143
    Abstract: The present invention relates to a method and an apparatus for transporting in alternating suction and displacement strokes of fluid substances, e.g., water, slurry, etc., by quanta by means of the potential energy of a primary liquid column by interposing a system of vessels sealed off from the atmosphere between the primary liquid column and the secondary fluid substance basis.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: October 21, 1980
    Assignee: "NIKEX" Nehezipari Kulkereskedelmi Vallalat
    Inventors: Janos Pucher, Antal Schmider
  • Patent number: 4226573
    Abstract: A hydraulically-operated machine adapted to receive water at an upper level from a relatively large reservoir and to discharge the water to a lower level, which includes a piston head carried upon a piston rod mounted for vertical movement in guide bushes located above and below the piston head, inlet control valves for allowing water to flow from the upper level alternately to the upper and lower surfaces of the piston head, and outlet control valves for allowing water on the respective other side of the piston head to flow to the lower level.
    Type: Grant
    Filed: July 18, 1978
    Date of Patent: October 7, 1980
    Inventor: Alister U. Reid
  • Patent number: 4224013
    Abstract: An air compressor for inflating pneumatic tires of a motor vehicle is particularly adapted to be powered by the negative pressure created at the intake manifold of the vehicle engine. The piston of a reciprocating air pump has a direct mechanical coupling with the plunger of a pneumatic cylinder assembly for driving the air pump. The cylinder assembly in turn is operated by the negative pressure of the intake manifold through a unique valve control system which automatically directs the negative pressure flow in a manner to reciprocate the plunger and hence, drive the air pump piston. In preferred forms, the plunger presents a greater operating area than the air pump piston whereby a pressure multiplying effect is provided to obtain the relatively high inflation pressures required for many pneumatic tires.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: September 23, 1980
    Inventor: Arthur Davis, Sr.
  • Patent number: 4223706
    Abstract: A system for transferring a volatile liquid fuel into a tank therefor, while avoiding passage of fuel vapors into the atmosphere. Vacuum assist means is provided including a reciprocatory, fuel actuated tandem motor and pump combination, to assure maintenance of a condition in the system which will prompt removal of fuel vapors from the tank being filled.
    Type: Grant
    Filed: June 8, 1978
    Date of Patent: September 23, 1980
    Assignee: Texaco Inc.
    Inventor: Dean C. McGahey
  • Patent number: 4213298
    Abstract: A self-reversing hydraulic control system for use with a device to be driven in opposite directional modes, especially a self-reversing pump driven by such a device. The system depends upon a flow sensing element disposed to sense flow associated with movement of the driven device and adapted to generate a stop signal responsive to the termination of such flow. A means responsive to the stop signal is then effective to shift the system from one directional mode to the other. Also featured is a sensor disposed to receive and transmit hydraulic fluid under pressure to drive the device, stoppage of the flow adapted to cause the sensor to shift position and to transmit pressurized hydraulic fluid pressure, as the stop signal via a hydraulic line. In preferred embodiments the self-reversing hydraulic control system has a two-position 4-way valve which is shifted in position by the hydraulic stop signal.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: July 22, 1980
    Assignee: Offshore Devices, Inc.
    Inventor: Jerome H. Milgram
  • Patent number: 4202656
    Abstract: A subsurface hydraulically powered pump assembly having a reciprocating pump end, a reciprocating engine end, a valve assembly for controlling the flow of power fluid to and from the engine, and a jet-type pump incorporated therewith which utilizes either the spent power fluid, or alternatively, utilizes fresh power fluid in boosting the action of the reciprocating pump. The invention comprehends utilizing the jet action to supplement the engine action at either the pump suction or the pump exhaust, thereby enabling a considerable variation in the size of the pump and engine piston, and furthermore enabling a conventional downhole reciprocating pump to move an increased volume of fluid to a greater height.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: May 13, 1980
    Inventor: George K. Roeder
  • Patent number: 4178240
    Abstract: A system for handling two liquid streams comprises an hydraulic circuit including a pair of receptacles each provided with movable partition means dividing it into first and second chambers. Rod means extending through a first chamber of each receptacle connects the partition means and is effective to cause reciprocation of one partition means to be repeated by the other so that as the first chamber of one receptacle is expanded, the first chamber of the other receptacle is contracted. A quantity of the first liquid is delivered alternately to the first and second chambers of one receptacle as those chambers expand. As those chambers contract first liquid is passed through conduit means from the first and second chambers of said one receptacle to the first and second chambers, respectively, of said other receptacle.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 11, 1979
    Inventor: Harry E. Pinkerton
  • Patent number: 4163632
    Abstract: A hydraulic pump assembly having a motor actuated by a source of fluid under pressure and in turn actuating a fluid pump under the control of a valve responsive to operation of the motor. The diameter of a piston of the pump is smaller than the corresponding diameter of a piston of the motor in order to permit the pump to obtain higher output pressures than are required to actuate the motor. The valve includes a valve element connected directly to the piston of the motor and slidably disposed in a pair of axially spaced, cylindrical housing parts so as to sequentially place ports provided in spaced ends of the valve element in communication with passages provided in the cylindrical housing parts.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: August 7, 1979
    Assignee: Bessie L. Caldwell
    Inventors: Leslie R. Hinchman, Robert B. Hinchman, Sr.
  • Patent number: 4131397
    Abstract: There is disclosed in the present application a double acting diaphragm pump including a two part hollow housing which defines two pumping chambers, one on each side of the diaphragm. A pumping stroke is imparted to the diaphragm by means of a hydraulic actuator contained within the housing and including a cylinder connected to the diaphragm and supplied with hydraulic fluid through a hollow connector which also clamps the two parts of the housing together on the margin of the diaphragm.
    Type: Grant
    Filed: April 14, 1977
    Date of Patent: December 26, 1978
    Assignee: Offshore Devices Inc.
    Inventors: Jerome H. Milgram, Vance S. Bartoo, Burdett H. O'Connor
  • Patent number: 4119113
    Abstract: In a blood dialysis system a proportioning pump accurately mixes precise quantities of water and concentrate. A double-acting piston assembly is disposed in a stepped cylinder which has proximity sensing switches at both ends thereof. These are operated as the piston assembly reaches the end of its stroke in each direction. The switches alternate a bistable solenoid valve system which directs pressurized water to opposite sides of a large central piston, thus causing the piston assembly to reciprocate. Small pistons, attached on opposite sides of the large piston, move in small pump chambers, with check valves. The small pistons pump concentrate in a precise ratio to the volume of water driving the large piston.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: October 10, 1978
    Assignee: Extracorporeal Medical Systems, Inc.
    Inventor: Stephen Mason Meginniss, III
  • Patent number: 4118154
    Abstract: A downhole, hydraulically actuated pump assembly, having an engine reciprocatingly connected to a production pump. Power fluid is conducted downhole to the engine of the pump assembly, while production fluid and spent power fluid is conducted uphole to the surface of the ground.The pump assembly includes a housing within which spaced, axially aligned, cylindrical chambers reciprocatingly receive spaced engine and pump pistons which are connected together in a manner to enable the engine to reciprocate the production pump.A mechanically actuated valve assembly is contained within the engine piston and is arranged respective to various different flow passageways so that flow of power fluid through the engine forces the engine piston to reciprocate.The valve assembly includes a control rod and a valve element concentrically arranged respective to one another and to the engine piston. The valve element is reciprocated respective to the engine piston in response to the reciprocation of the control rod.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: October 3, 1978
    Inventor: George K. Roeder
  • Patent number: 4110980
    Abstract: Agitation of the surface of a body of water by a falling stream of water results in the entrainment of air bubbles which are carried underneath the surface. These air bubbles are collected in a tank having a submerged open bottom. Air pressure is produced within the tank and utilized to perform useful work by operating a pneumatic pressure transformer which in turn produces high pressure air for operating a series of air-lift pumps. In an alternative embodiment a reciprocating piston motor or turbine is positioned in a path of flow between a portion of the body of water containing relatively few air bubbles and another portion containing a relatively large quantity of bubbles. Flow through this path takes place by reason of a difference in densities and is available to do useful work.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: September 5, 1978
    Inventor: Willing B. Foulke
  • Patent number: 4104008
    Abstract: A fluid-actuated, such as a pneumatically actuated, hydraulic pump of either the single acting or the double acting type is controlled in its operation by a main valve member which has two connecting compartments the fluid in one of which is always at the atmospheric, and in the other always at a superatmospheric, pressure. The main valve member has two end faces, one larger than the other, the smaller being always acted upon by the superatmospheric pressure of the fluid and the larger one intermittently. An auxiliary valve member controls the admission of the pressurized fluid to the larger end face and is open only during the reversal of the hydraulic pump from suction to pumping stroke, while the pressure acting on the larger end face is relieved during reversal from the pumping to the suction stroke. A duct communicates one or the other of the connecting compartments of the main valve member which an actuating compartment of an actuating unit, depending on the position of the main valve member.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: August 1, 1978
    Assignee: Schmidt Kranz & Co.
    Inventors: Ernst Hoffmann, Siegfried Reimann, Heinz Aschermann
  • Patent number: 4087206
    Abstract: The invention relates to apparatus for and the method of reversing the operation of a power piston in a power cylinder automatically to pump oil, corrosive or wax bearing fluids. The flow of high pressure fluid driving the piston in one direction may be reversed to drive the piston in the opposite direction at the end of the respective strokes by establishing a collapsible chamber for the high pressure fluid within the piston. This chamber is at least partially collapsed toward the end of each stroke by the stem of an auxiliary reversing piston striking a stop slightly before the end of the stroke to partially collapse said chamber and establish a further chamber on the opposite side of the reversing piston.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: May 2, 1978
    Assignees: Robert G. Brooks, Wretha M. Brooks
    Inventor: Carl D. Russell
  • Patent number: 4084923
    Abstract: A downhole, hydraulically actuated pump assembly of the free or fixed type which includes a control valve positioned above the engine, and a plurality of pistons connected together by a hollow connecting rod. The pistons are arranged to divide a production cylinder from an engine cylinder, so that the connecting rod is always placed in compression, thereby avoiding rod breakage. The hollow connecting rod is employed to supply power fluid to the lower engine, and the rod ends are arranged to have fluid pressure exerted thereagainst to improve the operation of the pump assembly.The production pump divides the engine into an upper and lower engine assembly so that the upper engine strokes the pump in a downward direction, while the lower engine strokes the pump in an upward direction.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: April 18, 1978
    Inventor: George K. Roeder
  • Patent number: 4068476
    Abstract: A power unit, energizable by solar heat, having a thermodynamic system including an evaporator, vapor pressure actuated motor, pump and condenser, the motor being arranged to operate upon evaporation of fluid in the evaporator, which is subsequently condensed and pumped back into the evaporator. The vapor pressure actuated motor is coupled to a hydraulic pump which in turn drives a hydraulic motor. The fluid in the thermodynamic circuit is a low temperature boiling fluid, preferably a fluoro carbon refrigerant, so that use can be made of "low grade" heat.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: January 17, 1978
    Assignees: Andrew Graham Brown, K. E. Ellis Holdings Pty. Ltd.
    Inventor: Christopher George Kelsey
  • Patent number: 4062639
    Abstract: A high pressure pump comprising a valve body having a first housing secured at one of its ends to one end of the valve body and having a body member secured to the other end thereof. A second housing is secured to the body member with a piston rod movably extending through the body member and the first and second housings. A first piston secured to the piston rod and movably positioned in the first housing defines first and second chambers. A second piston secured to the piston rod and movably positioned in the second housing defines third and fourth chambers. Check valve means are in communication with the third and fourth chambers and sources of fluid to be pumped. The valve body has a pilot valve therein. The pilot valve means is connected to the piston rod so that the pilot valve means will be moved from a first position to a second position when the piston rod moves from a first position to a second position and vice versa. The valve body also has a main valve therein.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: December 13, 1977
    Assignee: The Hotsy Corporation
    Inventor: George D. Conlee
  • Patent number: 4043709
    Abstract: In a liquid product measuring pump driven by an air motor having air valve controls for reversing the reciprocating motion of the air motor at the end of the stroke for controlling the liquid product measuring, an adjustable stop assembly including a quickly replaceable stop bar with an extendible threaded rod therein, the rod being minutely adjustable by an insert fitting on the mounting for the stop bar.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: August 23, 1977
    Assignee: Domain Industries, Inc.
    Inventor: John J. Grevich
  • Patent number: 4019838
    Abstract: A two-stage pump which includes a pair of reciprocating pump members operating in opposed pump chambers and a connecting rod connecting the pump members to cause the pump members to operate in unison. Air under pressure is supplied to the chambers by a spool valve member which operates in a guide sleeve. The spool valve includes four outwardly extending portions defining a central pressure slot and a pair of exhaust slots. Ports in the sleeve communicate with the pump chambers. The spool valve is moved by pressure in pressure chambers at opposite ends of the sleeve member. The sleeve is mounted in a bore, and metering air passageways are formed between the valve sleeve and the bore and connecting the pressure chambers with the exhaust slots.
    Type: Grant
    Filed: September 3, 1975
    Date of Patent: April 26, 1977
    Inventor: Henry T. Fluck
  • Patent number: 3999896
    Abstract: A continuously operable piston pump for conveying of viscous materials, such as mortar mixes or the like comprises first and second chambers separated from a pressure source, such as a piston cylinder arrangement, by respective flexible wall means. The chambers are connected in series with each other. The pressure source is controlled by a further piston cylinder arrangement including a control valve at each end of the control cylinder. The control valves are operated by a flip-flop means which in turn is actuated by means directly coupling the flip-flop means to the piston rod of the control piston cylinder arrangement. The pressure piston cylinder arrangement and the control piston cylinder arrangement are constructed to have a common axis, and thus also a common piston rod located in said axis. The control valves are connected to said common piston rod.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: December 28, 1976
    Inventor: Martin Sebastiani
  • Patent number: 3991574
    Abstract: A fluid pressure power plant which converts heat energy, externally generated, to high hydraulic pressure. The system generates heat energy in the form of steam or hot gas, supplies the heat energy to a double-acting intensifier piston which converts the heat energy to high hydraulic pressure which is stored in an accumulator. The high pressure hydraulic energy stored in the accumulator is used to drive hydraulic motors or turbines through hydraulic output control valves. The system operates on a demand cycle in that no energy input from the heat generator and power conversion piston is necessary until there is some demand for power output from the hydraulic accumulator, once said accumulator is fully charged.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: November 16, 1976
    Inventor: Larry Vane W. Frazier