Electrically Or Magnetically Actuated Distributor Patents (Class 417/505)
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Patent number: 5630709Abstract: The present invention provides a pump for inducing a displacement of a fluid from a first medium to a second medium, including a conduit coupled to the first and second media, a transducing material piston defining a pump chamber in the conduit and being transversely displaceable for increasing a volume of the chamber to extract the fluid from the first medium to the chamber and for decreasing the chamber volume to force the fluid from the chamber to the second medium, a first transducing material valve mounted in the conduit between the piston and the first medium and being transversely displaceable from a closed position to an open position to admit the fluid to the chamber, and control means for changing a first field applied to the piston to displace the piston for changing the chamber volume and for changing a second field applied to the first valve to change the position of the first valve.Type: GrantFiled: February 9, 1996Date of Patent: May 20, 1997Assignee: California Institute of TechnologyInventor: Yoseph Bar-Cohen
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Patent number: 5607288Abstract: A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine. Biasing means is located within the scroll machine in order to control the rate at which the intermediate pressurized fluid is bled to the suction zone of the compressor.Type: GrantFiled: May 4, 1994Date of Patent: March 4, 1997Assignee: Copeland CorporationInventors: Frank S. Wallis, Jean-Luc Caillat, Francis M. Simpson, Gary J. Anderson, Donald W. Rode, Norman G. Beck
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Patent number: 5605317Abstract: An electro-magnetically operated valve for control of pressurized fluid including a coil bobbin disposed within a housing, having a plunger subassembly moveably mounted in said housing having a fixed valve seat at one end and a magnet mounted at the opposite end and including a flow passage extending there between, whereby the plunger is moveable responsive to an electronic coil mounted in the coil bobbin between an open position wherein the valve body member is in spaced relationship with the valve seat permitting flow of pressurized fluid, and a closed position whereby the valve body member is seated against the valve seat, said valve being connected to sensor apparatus for sensing phase relations of a piston of a pump operationally connected to a switch apparatus for forming a magnetic circuit including the electro-magnetic coil such that the valve is operated by positively controlling the opening the opening and closing of the valve by passing a current through the coil.Type: GrantFiled: September 30, 1994Date of Patent: February 25, 1997Assignee: Sapphire Engineering, Inc.Inventors: Stephen Mealy, Keith D. Besse
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Patent number: 5584671Abstract: A fluid delivery system is disclosed which includes a pump and a fluid delivery set. The fluid delivery set includes a stop cock valve, and the pump includes a valve actuation unit into which the stop cock valve is positioned for operation of the system. The valve actuation unit includes a valve receiving mechanism which requires the valve to be closed in order to be inserted into or removed from the valve actuation unit, thereby preventing accidental free flow of fluid at all times. The fluid delivery set may also include an auxiliary fluid source to allow periodic flushing of the fluid delivery line, and the valve actuation unit can be programmed by the pump to automatically initiate periodic flushing cycles if desired.Type: GrantFiled: November 28, 1994Date of Patent: December 17, 1996Assignee: Sherwood Medical CompanyInventors: Frederick F. Schweitzer, Jr., Clarence L. Walker, Randall J. Krohn
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Patent number: 5577892Abstract: In a method of injection fuel for Diesel engine comprising a high pressure injection pump with a fuel supply line for supplying high pressure fuel to fuel injection nozzles wherein a fuel control line extends between the pump and a low pressure fuel supply line for discharge in excess fuel thereto under the control of a magnetic valve which is closed to end the discharge of excess fuel and initiate pumping of fuel, the magnetic valve is opened at the end of fuel pumping at a point corresponding to a piston stroke length h after the upper dead center of the piston such that, when communication between the pump and the low pressure fuel line is established, pressure pulses in the low pressure fuel line are avoided.Type: GrantFiled: March 22, 1996Date of Patent: November 26, 1996Assignee: Mercedes Benz AGInventors: Michael Schittler, Ulrich Augustin, Volker Schwarz, Hermann Hiereth
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Patent number: 5562428Abstract: A fuel injection pump driven by an electric coil, the pump including a poppet valve slidable within a fuel passage in an armature structure and relative thereto in response to movement of the armature structure relative to the pump housing and through a stroke length between a first position permitting flow in a fuel passage from a low pressure fuel chamber to a high pressure fuel chamber, and a second position preventing fuel flow between the high and low pressure fuel chambers, and comprising a head portion located in the high pressure fuel chamber and including a valve surface which is spaced from the valve seat when the poppet valve is in the first position permitting fuel flow from the low pressure fuel chamber to the high pressure fuel chamber, and which is sealingly engaged with the valve seat when the poppet valve is in the second position preventing fuel flow between the high and low pressure fuel chambers, an adjustment member extending in a bore in the housing wall and being engageable with the popType: GrantFiled: April 7, 1995Date of Patent: October 8, 1996Assignee: Outboard Marine CorporationInventors: Francis V. Bailey, William R. Krueger
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Patent number: 5449226Abstract: A braking system actuator includes a casing which accommodates therein a plurality of electromagnetic valves for controlling operations of a hydraulic circuit. A plurality of terminals which are connected to an external circuit are embedded in a surrounding wall of the casing with a given distance for insulation from each other. Connecting portions of the terminals for the electromagnetic valves extend from the surrounding wall of the casing to reach the neighborhood of corresponding solenoid terminals of the electromagnetic valves for connection therewith. On the other hand, connecting portions of the terminals for a motor which drives a hydraulic pump are connected to positive and negative terminals of the motor, respectively.Type: GrantFiled: August 27, 1993Date of Patent: September 12, 1995Assignee: Nippondenso Co., Ltd.Inventors: Toru Fujita, Hiroyuki Shinkai, Takashi Umeno
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Patent number: 5429485Abstract: An integral disposable manifold and pump cassette, through which fluid is pumped from inlet tubes, forms a single disposable cassette which may be inserted into a single pump housing. The integral disposable manifold and pump cassette includes first and second sheets of flexible plastic material. Sealed inlet channels are formed between the first and second sheets of flexible plastic material, with the sealed inlet channels being connectable to inlet tubes for fluid passage therethrough. The sealed inlet channels can be individually pinched off to prevent fluid passage therethrough. A sealed main channel, which is connected between the inlet channels and an outlet tube is formed between the first and second sheets of flexible plastic material. The sealed main channel includes a pumping chamber which is also formed between the first and second sheets of flexible plastic material.Type: GrantFiled: June 30, 1994Date of Patent: July 4, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventor: Larry H. Dodge
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Patent number: 5409354Abstract: A variable discharge pump (3) comprises a piston (4) reciprocable within a cylinder (2), a displaceable inlet valve (5) adapted to control admission of lower pressure hydraulic fluid (9) to the swept volume areal (10) of the piston (4) and cylinder (2), a displaceable outlet valve (7) adapted to control delivery of higher pressure fluid (9) from the swept volume area (10), and means (13, 13A, 26-28, 29-44) to control the position of the inlet valve (5) so as to control the volume of fluid (9) delivered by the pump (3) in accordance with demand.Type: GrantFiled: August 26, 1994Date of Patent: April 25, 1995Assignee: ER Fluid Developments LimitedInventor: James E. Stangroom
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Patent number: 5388968Abstract: An electronically controlled gas compressor inlet valve includes a housing mounted on the compressor in fluid communication with an inlet of the compressor. A piston member is moveable linearly within the housing along a path of travel, into and out of occluding relation with the compressor inlet. A linear positioning device is connected to the piston member. The linear positioning device positions the piston member linearly, in a predetermined location, along the path of travel. A vent maintains a predetermined atmospheric pressure across the piston member. A sensor determines compressor inlet pressure, and generates a signal in response to a predetermined inlet pressure. A controller is operatively connected to the stepper motor for controlling actuation of the stepper motor in response to the signal generated by the sensor.Type: GrantFiled: July 28, 1994Date of Patent: February 14, 1995Assignee: Ingersoll-Rand CompanyInventors: James A. Wood, Robert R. Ball
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Patent number: 5385455Abstract: An electronic variable orifice flow control valve includes a valve body mounted on a hydraulic pump housing in a valve bore of the housing, a valve seat on the valve body, a metering rod cooperating with the vale seat in defining a variable orifice, and a solenoid having an armature connected to the metering rod and mounted on a body of the solenoid for bodily shiftable movement between retracted and extended positions. The solenoid body has a concentric discharge type discharge port therein, i.e. a discharge port through which fluid flows concentric with a longitudinal centerline of the valve bore, and the solenoid armature is tubular so that a fluid flow path is defined from the variable orifice to the concentric discharge type discharge port through the armature.Type: GrantFiled: August 18, 1993Date of Patent: January 31, 1995Assignee: General Motors CorporationInventors: Larry E. Dinsmore, Gary G. Hegler
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Patent number: 5356269Abstract: A variable displacement pump (3) comprises a piston (4) reciprocable within a cylinder (2), a displaceable inlet valve (5) adapted to control admission of lower pressure hydraulic fluid (9) to the swept volume area (10) of the piston (4) and cylinder (2), a displaceable outlet valve (7) adapted to control delivery of higher pressure fluid (9) from the swept volume area (10), and means (13, 13A, 26-28, 29-44) to control the position of the inlet valve (5) so as to control the volume of fluid (9) delivered by the pump (3) in accordance with demand.Type: GrantFiled: August 17, 1993Date of Patent: October 18, 1994Assignee: ER Fluid Developments LimitedInventor: James E. Stangroom
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Patent number: 5338160Abstract: A radial piston pump includes a plurality of radially arranged cylinder-pger assemblies having suction valves and pressure-regulating valves, with the plungers being controlled by an eccentric disk which eccentrically circulates relative to a housing accommodating the cylinders. In order to provide a radial piston pump of this type with a simple design and to allow a digital operation of the pump for controlling the flow rate, the space between the end faces (12) of the cylinders (9) and the pertaining plungers (7) is connectable with a pressure manifold (19) of the pump by a randomly controllable valve (21, 22), with the plungers (9) of the pump preferably having different diameters.Type: GrantFiled: April 26, 1993Date of Patent: August 16, 1994Assignee: Gesellschaft fur okologische Okomobil Technologie fur Fahrzeuge GmbHInventor: Jorg Thurner
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Patent number: 5259738Abstract: A multi-chamber fluid working machine has at least one electromagnetically controlled poppet valve linking each working chamber with respective high and low pressure fluid manifolds whereby displacement control is achieved by real time control of the electrically selectable poppet valves. Each valve seals via annular parts on the valve and its seat and is moved by reaction between a solenoid coil and a ferromagnetic part on the valve stem.Type: GrantFiled: March 23, 1992Date of Patent: November 9, 1993Assignee: University of EdinburghInventors: Stephen H. Salter, William H. S. Rampen
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Patent number: 5230613Abstract: A common rail fuel system, primarily including a high-pressure fuel pump, a rail, fuel injection nozzles, and an electronic control system, is disclosed. A substantially constant fuel pressure is maintained within the rail by the fuel pump under the direction of the electronic control system. The pressurized fuel is communicated to the fuel injection nozzles, which are also under the direction of the electronic control system, thereby providing fuel at injection pressure immediately upon the actuation of the fuel injection nozzles by the electronic control system. The pump incorporates leakage fuel during each stroke without the necessity of rerouting the leakage fuel through a primary supply. This reduces the total amount of fuel pumped and improves metering accuracy.Type: GrantFiled: January 16, 1992Date of Patent: July 27, 1993Assignee: Diesel Technology CompanyInventors: Richard L. Hilsbos, Harold L. Wieland, Robert D. Straub, Richard F. Teerman, Robert C. Timmer
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Patent number: 5085560Abstract: Blending and pumping systems for accurately delivering desired amounts of processing fluids, particularly for use in semiconductor processing and semiconductor processors. Thee blending systems include one or more supply tanks from which a processing fluid is accurately pumped using the novel metering pump and associated pumping and blending methods. The blending systems preferably include a recycle line which includes a control valve which is controlled to recycle process fluid during an initial startup period. The outflow from the pump is preferably totally recycled during this startup period by blocking flow of process fluid to the blending container. The metering pump includes a pump housing having a pumping chamber which is partially defined by a displacement member, such as a flexible bellows structure. The pumping chamber is isolated from inlet and outlet via inlet and outlet valves, respectively.Type: GrantFiled: January 12, 1990Date of Patent: February 4, 1992Assignee: Semitool, Inc.Inventors: Raymon F. Thompson, Aleksander Owczarz
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Patent number: 4958989Abstract: An apparatus and method for selecting and controlling the output of a pressure compensated pump during operation is disclosed. The invention comprises a pressure compensated pump having a control inlet for the introduction of a digitally selected reference pressure. Means are provided for producing such a digitally selected reference pressure. Preferably, the means for producing this reference pressure includes a flow regulator for receiving fluid under pressure and establishing a constant pilot fluid flow; a plurality of conduits coupled in parallel to the output of the flow regulator between the flow regulator and a reservoir return flow; and, means individual to at least two of the conduits for controlling fluid flow in proportion to successive digital commands. The control inlet is also connected to the output of the flow regulator, the resulting reference pressure in the control inlet being generated by selected conduit flow areas characterized by the digital commands.Type: GrantFiled: October 30, 1989Date of Patent: September 25, 1990Assignee: Rockwell International CorporationInventor: William Frantz
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Patent number: 4911405Abstract: A valve unit, in particular for use at the suction inlet of a pumping apparatus, comprises a ball valve having a ball (2) and a seat (1) for controlling the flow of liquid between an inlet (18) and an outlet (19). A spring (3) forces the ball (2) into the seat (1). An actuating pin (8) projects through the valve seat (1) and contacts the ball (2). The actuating pin (8) is designed such that liquid can pass alongside the pin through a passageway (22). The armature (14) of a solenoid (12) can be pushed against a membrane (10) which is in contact with the actuating pin (8) so that the ball (2) is lifted from the seat (1) and the valve is opened. Since the opening and the closing of the valve unit can thus be actively controlled, the switching operation of the valve unit is very well reproducable resulting in a more uniform flow of the liquid delivered by a pumping apparatus connected to the outlet (19) of the valve unit.Type: GrantFiled: February 2, 1989Date of Patent: March 27, 1990Assignee: Hewlett-Packard Co.Inventor: Hans-Georg Weissgerber
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Patent number: 4832580Abstract: Provided are a pair of pumps, each of which comprises a bellows having an intake inlet and a discharge outlet, a reciprocating drive means for contraction and expansion movements of the bellows, and a couple of electro-magnetic on-off valves disposed respectively in the intake inlet side and discharge outlet side of the bellows, so that, during the contracting motion of the bellows, the electro-magnetic on-off valve in the intake inlet side becomes closed while the electro-magnetic on-off valve in the discharge outlet side becomes open, and during the expanding motion of the bellows, the electro-magnetic on-off valve in the intake inlet side becomes open while the electro-magnetic on-off valve in the discharge outlet side becomes closed. The paired pumps perform the discharge motions alternately. The discharge outlets of the pumps at their ends are fluidly connected via a directional valve with a discharging gun.Type: GrantFiled: October 14, 1987Date of Patent: May 23, 1989Assignee: Sunstar Engineering Inc.Inventors: Nagata Tsuyoshi, Nakamune Kenichi, Fujita Katsuto
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Patent number: 4820130Abstract: Inside the hermetic shell of a scroll compressor, a normally closed solenoid valve seats against the back side of a stationary scroll plate to close a discharge opening through the plate. A coil circuit that actuates the valve has an electrical resistance that increases with temperature. The temperature dependent resistance allows the coil circuit to also function as a discharge temperature sensor. Should the discharge gas over-heat, the compressor motor and the valve are de-energized in response to the resistance exceeding a predetermined limit. The closed valve prevents backflow from rapidly reversing the rotational direction of the compressor, which can be extremely noisy and damaging to the compressor. Both the valve and the compressor motor are energized at the same time, regardless of the compressor's direction of rotation.Type: GrantFiled: December 14, 1987Date of Patent: April 11, 1989Assignee: American Standard Inc.Inventors: David H. Eber, Peter A. Kotlarek, Ronald W. Okoren
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Patent number: 4815946Abstract: A hydraulic pump having a cylinder closed at one end with an elongated piston arranged within the cylinder from the other end. The piston is constructed of a positive magnetostrictive material which increases in length in the presence of a magnetic field of appropriate intensity. It is wound along its length with a coil of wire capable of producing an electro-magnetic field upon energization. The piston is fastened at the open end of the cylinder to define a cylinder cavity between the cylinder closed end and the piston. A pair of passages including valves, for use as an intake and an exhaust passage, communicate with this cavity. The valve members in each cavity comprise a magnetically polarized member, each of opposed polarity as related to the other, such that upon energization of the pump with one polarity of pulses, the valves will assume a particular function, and with a reversed polarity of operating pulses, a reverse function.Type: GrantFiled: April 11, 1988Date of Patent: March 28, 1989Assignee: GTE Valeron CorporationInventor: Robert F. Cusack
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Patent number: 4808089Abstract: A reciprocating pump having a fluid assembly having a fluid wing at its input side encompassing an admission line and an admission chamber. A moveable valve part of, for example, a magnetizable material is arranged in the admission chamber. A component part, for example a permanent magnet, which attracts the valve part against a valve seal is situated outside of the fluid wing. The valve part and the component part together form a magnetic spring system. An advantage of this arrangement is an extremely small dead spacing inside the fluid wing. Resulting therefrom is that gas bubbles can also be conveyed with great reliability. Also harmful interaction between the conveyed medication and the component part such as, for example, corrosion of the component part or conversions of the medication influenced by the component part, cannot occur.Type: GrantFiled: September 1, 1987Date of Patent: February 28, 1989Assignee: Siemens AktiengesellschaftInventors: Gerhard Buchholtz, Werner Fickweiler, Peter Obermann
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Patent number: 4795317Abstract: A hydraulic pump having a cylinder closed at one end with an elongated piston arranged within the cylinder from the other end. The piston is constructed of a positive magnetostrictive material which increases in length in the presence of a magnetic field of appropriate intensity. It is wound along its length with a coil of wire capable of producing an electro-magnetic field upon energization. The piston is fastened at the open end of the cylinder to define a cylinder cavity between the cylinder closed end and the piston. A pair of passages including valves, for use as an intake and an exhaust passage, settable as required, communicate with this cavity. The valve members in each cavity comprises a magnetically polarized member, each of opposed polarity as related to the other, such that upon energization of the pump with one polarity of pulses, the valves will assume a particular function, and with a reversed polarity of operating pulses, a reverse function.Type: GrantFiled: September 8, 1986Date of Patent: January 3, 1989Assignee: GTE Valeron CorporationInventor: Robert F. Cusack
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Patent number: 4773218Abstract: A pulse-actuated hydraulic pump includes a hydraulic chamber with a bellows having a volume increased or decreased by the selective application a force in an axial direction thereof by a piezoelectric actuator. Control means control electrically-driven valves to selective discharge fluid from the bellows in precisely controllable volumes through a first pumping port or a second pumping port.Type: GrantFiled: June 18, 1986Date of Patent: September 27, 1988Assignee: NGK Spark Plug Co., Ltd.Inventors: Naomasa Wakita, Kanji Ohya, Masatoshi Kuwata, Shuzo Hattori, Makoto Okuda
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Patent number: 4767288Abstract: A fuel injection pump is proposed in which the fuel supply quantity supplied to the injection location is determined by metering the quantity of fuel aspirated. The metering of the aspirated quantities is effected with the aid of at least one magnetic valve which is located in the fuel supply line leading to the fuel injection pump and with the aid of a control edge moved in synchronism with the rotation of the fuel injection pump, which controls the communication between the fuel supply line and the pump work chamber in series with the magnetic valve. The opening times of the two control locations are each longer than the maximum metering time, the overlapping time of the two control times determining the opening time of the communication between the fuel supply and the pump work chamber. The metering time is thus determined on the one hand by the switching time of the control edge moved in synchronism with the rpm and the other by a switching process of the magnetic valve.Type: GrantFiled: May 21, 1982Date of Patent: August 30, 1988Assignee: Robert Bosch GmbHInventor: Max Straubel
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Patent number: 4743171Abstract: An apparatus comprising a housing, a wall dividing the housing into high and low pressure chambers having a pressure differential therebetween, the wall including a surface partially defining the high pressure chamber, and a passage communicating with the surface and between the high and low pressure chambers, a valve seat located on the surface adjacent the passage, a valve member movable into engagement with the valve seat for preventing fluid flow through the passage, and a mechanism for causing the valve member to move away from the valve seat with a snap action.Type: GrantFiled: October 20, 1986Date of Patent: May 10, 1988Assignee: Outboard Marine CorporationInventor: J. Michael Mahoney
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Patent number: 4738493Abstract: Antiskid hydraulic braking system comprising a first shutoff valve operable to shutoff hydraulic pressure from a master cylinder to wheel cylinder as the brakes tend to lock the wheels of a vehicle. Wheel cylinders are connected to a reservoir through a second shutoff valve which relieves hydraulic pressure at the wheel cylinders until the tendency toward wheel lock disappears. The system further comprises an intermittently operable high speed hydraulic pump, such as a piezoelectric pump, which serves to pump the brake fluid in the reservoir to the wheel cylinders to restore hydraulic pressure in the wheel cylinders. The piezoelectric pump comprises a pump plunger having a small diameter head defining a pumping chamber and a large diameter base defining a delivery or pressure chamber. The brake fluid under pressure in the delivery chamber acts upon the plunger base to hydraulically preload the piezoelectric elements.Type: GrantFiled: May 19, 1986Date of Patent: April 19, 1988Assignees: Nippon Soken, Inc., Nippondenso Co., Ltd.Inventors: Mitsuo Inagaki, Hideaki Sasaya, Kenji Takeda, Kazuma Matsui
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Patent number: 4726741Abstract: A magnetostrictive hydraulic pump having a pump cylinder closed at one end with an elongated piston arranged within the cylinder from the other end. The piston is constructed of a magneto-strictive material which increases in length in the presence of a magnetic field of appropriate intensity. It is wound along its length with a coil of wire capable of producing an electromagnetic field upon energization. The piston is fastened at the open end of the cylinder to define a cylinder cavity between the cylinder closed end and the piston. A pair of passages, including valves, lead to a differential hydraulic actuator, for use as an intake and an exhaust passage to the actuator. The valve members in each cavity comprise a magnetically polarized member, each end of opposed polarity, such that upon energization of the pump with one polarity of pulses, the valves will assume a particular function, and with a reversed polarity of operating pulses, a reverse function.Type: GrantFiled: October 14, 1986Date of Patent: February 23, 1988Assignee: GTE Valeron CorporationInventor: Robert F. Cusack
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Patent number: 4657490Abstract: An infusion pump incorporates a cassette formed by bonding of two substantially flat sheets. The fluid to be infused to the patient comes into contact only with the cassette. The cassette includes first and second flexible sheets which define a pumping chamber therebetween. The infusion pump is provided with a pumping member having a hub and a plurality of petal-shaped sections extending radially outward therefrom and pivotal relative thereto. A stepping motor can be operated to move the pumping member against the second flexible sheet to decrease the volume of the pumping chamber and pump fluid to the patient. A load cell monitors the force exerted by the stepping motor on the hub. An outlet restriction valve is electronically controlled by a second stepping motor in response to the pressure sensed by the load cell to control pumping to a predetermined pressure.Type: GrantFiled: March 27, 1985Date of Patent: April 14, 1987Assignee: Quest Medical, Inc.Inventor: Martyn S. Abbott
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Patent number: 4646224Abstract: A sprinkler system including a controller having a manual data entry device, a processor and a sprinkler controller. Data is entered through the data entry means relating to conditions in each of a number of zones in which sprinkling is to occur with respect to the amount of water needed to be applied to that zone and the soil water infiltration rate. Upon receiving this information, the processor determines for each zone the number of cycles and the length of time in each cycle that water is to be applied not only so that the amount of water applied during each cycle does not exceed the amount of water the soil can absorb during that cycle, but also so that the total amount of water needed by that zone is applied. The processor employs the number of cycles and the length of on time per cycle to organize the cycles for all of the zones, creating an application program.Type: GrantFiled: December 5, 1983Date of Patent: February 24, 1987Assignee: L. R. Nelson CorporationInventors: David P. Ransburg, Douglas C. Fletcher, Sven E. Wahlstrom
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Patent number: 4636150Abstract: An electromagnetic pump comprising a housing having a fluid receiving chamber in communication with an inlet, a pair of fluid chambers connected by a fluid bypass passage to accommodate bubbles, one in communication with the fluid receiving chamber and the other in communication with an outlet, an electromagnet carried by the housing located external to the fluid chambers thereof, and a barrier in the form of a thin diaphragm of fluid impermeable material which hermetically isolates the electromagnet from the fluid chambers. An armature in the housing is movable within a body of magnetically permeable material which contains the bypass, has a pole portion located for magnetic attraction by the electromagnet, and has a piston portion, preferably of smaller cross-section than the pole portion, for forcing fluid from the fluid chambers and through the outlet.Type: GrantFiled: June 5, 1984Date of Patent: January 13, 1987Assignee: Greatbatch Enterprises, Inc.Inventors: Theodore J. Falk, Lawrence E. Morris
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Patent number: 4615661Abstract: A magnetic pump having a housing or block with three compartments and a port for supplying fluid into the center compartment. A pair of receivers are mounted in the center compartment and have check valves to allow fluid to flow into the receivers and outlets for conducting fluid out of the receivers. A sliding sleeve is mounted near each receiver and is reciprocal between two positions in which fluid is enclosed on one side of the receiver or the other. A piston assembly, mounted within each sleeve, is reciprocal to force the enclosed fluid from within the sleeve through the check valves into the receiver. The sleeves and the pistons are reciprocated electromagnetically. The cycle of the sleeves slightly preceeds the cycle of the pistons.Type: GrantFiled: November 26, 1985Date of Patent: October 7, 1986Inventor: Jimmy L. King
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Patent number: 4580949Abstract: A sliding vane type rotary compressor has at least two suction ports through which a refrigerant is sucked into the vane chamber. A combination of a spring made of a shape memory alloy adapted to expand and contract when supplied with an electric current and a spool operative by the spring is disposed in a flow passage through which the source of the refrigerant is connected to one of the suction ports leading to a region of higher magnitude of compression. The flow passage is opened and closed by the spool which is moved by the expansion and contraction of the spring of the shape memory alloy in response to the heat produced by the self heat build-up action when supplied with an electric current and also to the cooling function of the refrigerant of low temperature, thus attaining a variable capacity control of the compressor with a simple and compact construction.Type: GrantFiled: March 19, 1985Date of Patent: April 8, 1986Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Teruo Maruyama, Tadayuki Onoda
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Patent number: 4575313Abstract: A pressure controller includes a set point switch mechanism by which a selectable pressure to be maintained in a pressure vessel can be set. The actual pressure in the pressure vessel is detected and converted into a corresponding electrical signal by a suitable pressure transducer. Electrical signals from the set point switch mechanism and the transducer are utilized by a computer to generate control signals for controlling a volume adjustment mechanism which adjusts the effective volume of the pressure vessel and adjusts the quantity of pressurizing fluid disposed in the vessel. The volume adjustment mechanism includes a piston disposed in a cavity which is connectable with the chamber of the pressure vessel. The volume adjustment mechanism also includes a stepper motor which can be moved in precise increments to adjust the position of the piston in the cavity.Type: GrantFiled: September 19, 1984Date of Patent: March 11, 1986Assignee: Halliburton CompanyInventors: Prabhakar P. Rao, Jim B. Surjaatmadja, Jack C. Penn
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Patent number: 4569641Abstract: An electromagnetic pump comprising a housing having fluid receiving and pumping chambers in communication with an inlet and an outlet, respectively, an electromagnet carried by the housing external to the fluid chambers, and a barrier in the form of a thin diaphragm of fluid impermeable material which hermetically isolates the electromagnet from the fluid chamber. An armature in the housing is movable within a body of magnetically permeable material and has a pole portion located for magnetic attraction by the electromagnet and has a plunger portion in the pumping chamber for forcing fluid out of the chamber through the outlet. The armature is moved from a rest position through a forward pumping stroke when attracted by the electromagnet to force fluid out of the pumping chamber through the outlet, and the armature is moved by biasing spring in an opposite direction through a return stroke back to the rest position.Type: GrantFiled: September 7, 1982Date of Patent: February 11, 1986Assignee: Greatbatch Enterprises, Inc.Inventors: Theodore J. Falk, Lawrence E. Morris
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Patent number: 4563133Abstract: A plunger is held in a position where it opens a fuel passage through abutment of a stopper upon an end of a cylinder. The stopper is made of a non-magnetic material and mounted on the plunger which is made of a magnetic material.Type: GrantFiled: May 9, 1984Date of Patent: January 7, 1986Assignee: Nissan Motor Co., Ltd.Inventor: Seishi Yasuhara
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Patent number: 4558995Abstract: A pump furnished with an electrostrictive vibrator which pressurizes ink to be supplied to a head of an ink jet printer. The electrostrictive vibrator is adhered at one end to a diaphragm which closes an ink pressurization chamber, so that the vibrator vibrates integrally with the diaphragm perpendicularly to a plane in which it is adhered to the diaphragm, thereby varying the volume of the pressurization chamber. A vibrator drive signal supply circuit is installed in the pump which includes a time constant generation circuit adapted to apply a time constant to the waveform of a drive signal applied to the vibrator at the time of buildups and falls of the drive signal.Type: GrantFiled: April 23, 1984Date of Patent: December 17, 1985Assignee: Ricoh Company, Ltd.Inventors: Tatsuya Furukawa, Masanori Horike
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Patent number: 4558567Abstract: A continuously variable transmission (2) is constructed utilizing a constant displacement pump (4) of fixed fluid power stroke, rather than a variable displacement pump with a variable pump stroke. A fluid motor (14) is driven by the pump and has an output stroke. Means (22) are provided for varying the output stroke without varying the input power stroke.Type: GrantFiled: April 20, 1984Date of Patent: December 17, 1985Assignee: Eaton CorporationInventor: Herman P. Schutten
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Patent number: 4541394Abstract: A fuel injection pump of the radial plunger, spill port type includes electromagnetic means for opening and closing the spill port to control the pressurization of fuel for injection of fuel to the individual engine cylinders; a single solenoid assembly controlling the flow of fuel to and from a pair of pumping plungers in response to the movement of a shuttle valve mechanism; in one embodiment, a single retraction type delivery valve is used in connection with each pumping plunger and, in a separate embodiment, a single retraction type delivery valve is integrated with the shuttle valve mechanism which controls the individual delivery of fuel to a pair of engine cylinders.Type: GrantFiled: January 7, 1985Date of Patent: September 17, 1985Assignee: Ford Motor CompanyInventors: Michael M. Schechter, Aladar O. Simko
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Patent number: 4534714Abstract: A fluid operating device including a cylinder assembly with a cylinder bore and a pair of pistons slidably disposed therein. A plurality of electromagnets are mounted on each piston in opposed relation and extend the pistons by magnetic repulsion when energized. Inlet and outlet valves are provided in the cylinder and include permanent magnet valve members which open and close the valves upon energization and de-energization of the electromagnets.Type: GrantFiled: August 3, 1984Date of Patent: August 13, 1985Inventor: Raymond H. Smith
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Patent number: 4504198Abstract: An electromagnetic pump of the built-in electromagnetic valve type including an electromagnetic plunger actuating electromagnetic coil and an electromagnetic valve operating electromagnetic coil disposed co-axially in adjacent relationship and having magnetic paths of their own separated from each other by a non-magnetic portion, to obtain a desired magnetic flux distribution. The two electromagnetic coils have the same direction of windings to obtain an improved magnetic flux distribution, thereby providing improved pump operation. By passing a half-wave rectified current or a pulse current of a predetermined cycle to the two electromagnetic coils connected in series with each other, a magnetic flux can be produced in each electromagnetic coil and made to flow in the magnetic path exclusive to each electromagnetic coil, so that mutual interference of the magnetic fluxes produced by the two electromagnetic coils can be avoided.Type: GrantFiled: January 7, 1983Date of Patent: March 12, 1985Assignee: Taisan Industrial Co., Ltd.Inventors: Akira Toyoda, Yasutsune Chiba
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Patent number: 4501405Abstract: A valve having no friction producing components includes a flexible and resilient tube for carrying a fluid, an electrically energizable coil for producing an electromagnetic force when energized, a magnetically attractable element, and an elongate leaf spring attached near one end to the coil and looped outwardly, upwardly and back toward the coil, with the magnetically attractable element attached to the leaf spring near the other end. The leaf spring normally holds the magnetically attractable element out of contact with the coil, but when the coil is energized, the element is attracted towards the coil. The one end of the leaf spring attached to the coil is also formed to extend upwardly and over the magnetically attractable element to act as an anvil, and the other end of the leaf spring attached to the element extends upwardly towards the anvil to form a pinching tab.Type: GrantFiled: June 21, 1983Date of Patent: February 26, 1985Assignee: Bunnell Life Systems, Inc.Inventor: Joe D. Usry
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Patent number: 4498848Abstract: In a reciprocating piston air compressor, air is induced via an intake valve in the compressor cylinder head and, in addition, air which has been pre-compressed on the rear side of the piston is forced into the cylinder space via slots in the cylinder wall controlled by the piston. The delivery and the efficiency of the air compressor are improved according to the invention by the provision that the pre-compression of the air occurs by means of a turbo-compressor and that during the return stroke of the piston, the cylinder space is connected with an additional clearance space via an opened control valve in the cylinder head, by means of which the hot compressed air which has not been expelled is replaced by cooler air.Type: GrantFiled: March 28, 1983Date of Patent: February 12, 1985Assignee: Daimler-Benz AktiengesellschaftInventors: Jan Petrovsky, Heinz Roloff
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Patent number: 4458649Abstract: Two solenoid valves having needle valves to control the supply of fuel to a rotary distributor are mounted in such a manner that the needle valves move in a direction tangent to the rotating circle of a rotary distributor.Type: GrantFiled: March 8, 1982Date of Patent: July 10, 1984Assignee: Hitachi, Ltd.Inventors: Ikuo Takahashi, Yoshikazu Hoshi
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Patent number: 4441863Abstract: A variable discharge rotary compressor has a housing, a rotor disposed therein and vanes mounted on the rotor to cooperate with the housing and the rotor to define variable volume working chambers disposed close to and separated from an intake chamber by an end wall in which a communication passage is formed to communicate the working chambers with the intake chamber. The communication passage is located at a point where the working chambers are in their compression strokes. A valve is disposed in the communication passage to control the communication between the compression chambers and the intake chamber and is operative to communicate the compression chambers with the intake chamber to permit a part of the fluid in the compression chambers to be returned therefrom back into the intake chamber when the discharge of the compressor exceeds a predetermined discharge requirement.Type: GrantFiled: January 26, 1982Date of Patent: April 10, 1984Assignee: Nippondenso Co., Ltd.Inventors: Teruyuki Hotta, Yoshiki Kurokawa, Eiichi Nagasaku, Masao Yasunaga
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Patent number: 4437815Abstract: The pump has a chamber in which a piston reciprocates to pump a liquid. The piston is moved by having secured thereto the armature of at least one electromagnet (preferably two). The coil of the electromagnet is suitably external of the pump casing. A control circuit pulses the electromagnet at a predetermined rate to provide a predetermined periodic output.In a preferred form, the pump is mounted together with a liquid reservoir on a printed circuit board, and the unit is encapsulated for implantation in the human body to infuse a liquid medicine at a controlled rate into the bloodstream.Type: GrantFiled: May 15, 1981Date of Patent: March 20, 1984Inventor: John K. McMullen
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Patent number: 4431380Abstract: In a scroll compressor, means for maintaining the motion of an orbiting plate in fixed angular relationship to a stationary plate and for modulating the capacity of the compressor. The orbiting and stationary plates include intermeshed wrap elements of similar spiral shape about an axis. A coupling ring is slideably disposed between the plates and sealingly encloses the wrap elements. Four slots are provided in the coupling ring, aligned at right angles to each other and spaced apart around its inner circumference. Three segments, extending outward from the wrap elements, sealingly engage these slots. The fourth slot is engaged by a sliding key attached to one of the plates. The segments separate a first and a second fluid inlet and cooperate with the slots in the coupling ring to constrain the orbiting plate's motion in fixed angular relationship to the stationary plate.Type: GrantFiled: June 7, 1982Date of Patent: February 14, 1984Assignee: The Trane CompanyInventor: Robert E. Utter
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Patent number: 4406267Abstract: A spill port control valve assembly for a fuel injection pump of the radial plunger type having a plunger barrel and a fuel inlet-spill port in the wall of the barrel, the port being controlled by a tiltable valve that is self-aligning and actuated by a solenoid to a closed position to permit pressurization of the fuel.Type: GrantFiled: September 2, 1981Date of Patent: September 27, 1983Assignee: Ford Motor CompanyInventor: Rameshwar P. Sharma
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Patent number: 4388051Abstract: A piston pump having an intake valve whose valve member is approached by the pump piston. The piston magnetically attracts the valve member during the intake stroke to overcome the force of the spring biasing the valve member into its closed position.Type: GrantFiled: February 10, 1981Date of Patent: June 14, 1983Assignee: Linde AktiengesellschaftInventors: Helmut Dresler, Ernst Turnwald
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Patent number: 4344743Abstract: A piezoelectric driven variable volume having a chamber pump with a flexible tube and a non-compressible fluid therein. Solenoid operated valves are associated with the inlet and outlet of the flexible tube. A control circuit sequences the valves and the piezoelectric drive to pump small volumes of liquid through the flexible tube by a diaphragm-type action.Type: GrantFiled: December 4, 1979Date of Patent: August 17, 1982Inventors: Samuel P. Bessman, Lyell J. Thomas, Jr.