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"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7353747 | Electroactive polymer-based pump Methods and devices for pumping fluid are disclosed herein. In one exemplary embodiment, a pump is provided having a first member with a passageway formed therethrough, and a plurality of electrically expandable actuators in communication with the first member and a... | 04/08/2008 |
| 7351235 | Snivel removing device A snivel removing device includes a housing having a partition to form two chambers and an outlet port and an inlet port communicating with the chambers. One or more bladders are attached to the housing, and communicating with the chambers, and compressible and expa... | 04/01/2008 |
| 7241080 | Pump for transferring particulate material A pump for transferring particulate material from a source to a remote location, including a particulate chamber having open ends, check valves at the open ends, a vacuum source connected to the chamber adjacent one end, a gas source at the opposed end of the chambe... | 07/10/2007 |
| 7143956 | Suck back valve A suck back valve includes an ON/OFF valve mechanism which opens/closes a fluid passage by displacing a valve member together with a first piston under an action of a pressure fluid supplied into a first cylinder chamber, and a suck back mechanism which has a suctio... | 12/05/2006 |
| 7114929 | Reciprocating pump and check valve In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive... | 10/03/2006 |
| 7064472 | Electroactive polymer devices for moving fluid The invention describes devices for performing thermodynamic work on a fluid, such as pumps, compressors and fans. The thermodynamic work may be used to provide a driving force for moving the fluid. Work performed on the fluid may be transmitted to other devices, su... | 06/20/2006 |
| 7063514 | Air pump capable of inflating an inflatable object An air pump is capable of inflating an inflatable object, and includes a housing unit, a motor and a fan. The motor and the fan are disposed within the housing unit. The housing unit is formed with a pair of first and second intake port units and an exhaust port uni... | 06/20/2006 |
| 7029238 | Pump controller for precision pumping apparatus A pump controller and pump controlling method for dispensing a precise amount of low viscosity fluid are provided in which the problems of double dispenses and stuttered dispenses are avoided. In particular, the timing of the valves and motors in the pumping apparat... | 04/18/2006 |
| 6929454 | Thick matter pump In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons. However, leakage of hydraulic fluid can lead to an imbalance of the two... | 08/16/2005 |
| 6912871 | Structure for reducing refrigerant flow loss in compressor A structure for reducing a refrigerant flow loss in a compressor includes a refrigerant flow resistance reducing unit to reduce a refrigerant channel resistance at a lower surface of a rotor facing a compression mechanism unit. When the high temperature and high pre... | 07/05/2005 |
| 6450779 | Two-cylinder thick matter pump A two-cylinder thick-matter pump for continuous delivery of thick matter is characterized in that a reversing valve (5) has a diverter housing (8, 8') with at least four openings (a-b), the diverter (6, 6') disposed in the diverter housing (8, 8') is swiv... | 09/17/2002 |
| 6425742 | Discharge silencer provided with drain recovering function The silencer 22 having an enclosed tank 23 includes an inlet port 24 positioned at one side of the tank 23, a discharge port 25 positioned at another side of the tank 23, and a partition plate 26 separating an inner space of the tank 23 into an inlet side... | 07/30/2002 |
| 5336055 | Closed loop sludge flow control system A system and method for controlling operation of a sludge material handling system is disclosed. The sludge material handling system includes a positive displacement piston/cylinder pump, a sludge material feed system which delivers sludge material to the... | 08/09/1994 |
| 5222872 | Control system for piston pumps A double piston pump mechanism includes two pistons operated out-of-phase by respective fluid-actuated cylinders. The pistons suck-in fluid through suction valves and discharge pressurized fluid through pressure valves. The actuation of the cylinders is r... | 06/29/1993 |
| 5199541 | Electromagnetic clutch for a compressor A compressor is provided with a housing having a boss portion forming a central bore through which a drive shaft is passed, and a clutch has a rotor rotatably supported by the boss portion through a ball bearing. An armature thereof has a frictional surfa... | 04/06/1993 |
| 5168893 | Block and bleed valve A valve for use with a first working fluid conduit and a second working fluid conduit, the valve includes a valve body with a valve bore formed therein. A piston is slidably disposed within the valve body. There is a first opening and a second opening for... | 12/08/1992 |
| 5085560 | Low contamination blending and metering systems for semiconductor processing 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 flui... | 02/04/1992 |
| 4832580 | Fluid pressurizing delivery pump system 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 resp... | 05/23/1989 |
| 4828180 | Automobile cleaning system and portable unit thereof An automobile cleaning system comprises a source of cleaning fluid and control apparatus connected to the source and responsive to a control input for pressurized output of the cleaning fluid. The system has also a source of pressurized medium, such as po... | 05/09/1989 |
| 4820130 | Temperature sensitive solenoid valve in a scroll compressor 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... | 04/11/1989 |
| 4818186 | Drive mechanism for disposable fluid infusion pumping cassette A driver for use in an infusion pumping cassette having an elongated valve actuator which operates a valve controlling the flow of fluid through the cassette, a bracket having a first arm pivotally secured to one end of the valve actuator and a second arm... | 04/04/1989 |
| 4624625 | High pressure metering pump A high pressure metering pump has a duty cycle consisting of an aspiration portion where liquid is aspirated into a pumping chamber, a compression portion where the aspirated liquid is compressed to feed pressure, a feed portion where a part of the compre... | 11/25/1986 |
| 4597719 | Suck-back pump A suck-back pump for preventing any additional amount of liquid from dropping out of the tip of a delivery pipe, after a predetermined amount of liquid has been delivered from the delivery pipe. The suck-back pump includes inlet and outlet ports for liqui... | 07/01/1986 |
| 4583920 | Positive displacement diaphragm pumps employing displacer valves A positive displacement pump utilizes at least three driven displacer valves and a plurality of driving membranes and at least one pumping membrane to withdraw minute quantities of corrosive fluid from a drum and discharge same from a spray nozzle. The pu... | 04/22/1986 |
| 4575313 | Digital pressure controller 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 s... | 03/11/1986 |
| 4545740 | Automatic operating system for pump driven by internal combustion engine An automatic operating system for a pump driven by an internal combustion engine is disclosed in which the engine is kept in operation at a low and economical speed automatically disconnecting the pump from the engine when delivery pressure from the pump ... | 10/08/1985 |
| 4482301 | Valve controlled pump driven by a motor When a valve-controlled pump is to produce either vacuum or pressure at a pump outlet 9 as a function of its direction of rotation it is necessary that a 3/2-way valve be switched as a function of the direction of rotation of the motor of the pump. In acc... | 11/13/1984 |
| 4345883 | High pressure pumping apparatus for semi-fluid material Concrete is transmitted from a hopper forming a part of a mobile concrete pumping apparatus to the deposit site through a flow line having a Y-pipe inlet. The pumping apparatus includes two piston-cylinder concrete pumps mounted in side-by-side relationsh... | 08/24/1982 |
| 4344743 | Piezoelectric driven diaphragm micro-pump 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 ... | 08/17/1982 |
| 4339233 | Power-assisted valve A power-assisted valve is provided which is particularly effective for systems handling viscous materials, such as certain metering systems. The check valve operates effectively even with highly-filled viscous resins used in such systems. The valve includ... | 07/13/1982 |
| 4321014 | Constant flow pumping apparatus A multiple pumping chamber pump in which the pressures in at least two of said chambers are equal for at least a portion of their pumping cycles, maintains a constant flow of pumped material by utilizing control means that selectively and continually repl... | 03/23/1982 |
| 4315716 | Suction control valve A suction control valve adapted to be connected to the suction side of a compressor and comprising a valve housing, in which a valve seat is formed, which co-operates with a valve body which, in its opened position, brings the suction side of the compress... | 02/16/1982 |
| 4240523 | Motorized crankcase oil changing system A reversible fluid pump is driven by a reversible electric motor under the control of a three position toggle switch wired for off, forward and reverse. One port of the pump is connected to a four position valve, one position of which is off. A hose to a ... | 12/23/1980 |
| 4181162 | Vending apparatus This invention provides a container delivery system for vending apparatus for vending containers. The delivery system comprises a container store and dispenser, an arm moveable in to and out of the path of travel of a cup dispensed by the container dispen... | 01/01/1980 |
| 4150922 | Electromagnet motor control for constant volume pumping A constant-volume increment pipetting arrangement for use particularly in connection with analysis of minute specimen volumes of biological fluids. The arrangement, which is designed to have a very low inertia factor, comprises a pumping unit having a pai... | 04/24/1979 |
| 4105373 | Fluid distributor device for controlling an apparatus for pumping wet concrete and the like A concrete pumping unit comprising a pair of parallel piston pumps, alternately placed in communication with a concrete supply conduit and with a concrete delivery pipe, through a single baffle blade valve and respectively driven by coaxial fluid pressure... | 08/08/1978 |
| 4093404 | Apparatus for preparation of matrices containing frangible particulate matter A double acting metering pump is disclosed for use in apparatus to prepare matrices containing frangible particulate material. The double acting pump provides a metered output of matrix containing frangible particulate material which is mixed with a paren... | 06/06/1978 |
| 4092085 | Faucet assembly This invention provides a faucet assembly which includes a fluid passageway with valve means adapted to close and open the passageway, and a shaft which operates the valve means by rotating. Resilient biasing means are provided to the form of a spring-bia... | 05/30/1978 |
| 4065230 | Reciprocating infusion pump and directional adapter set for use therewith A reciprocating infusion pump is presented having a pair of syringes activated by individual actuating cylinders. The actuating cylinders are interconnected with a hydraulic fluid, and the cylinders and alternately pneumatically actuated whereby the cylin... | 12/27/1977 |
| 3994627 | Pumping apparatus for wet concrete A pumping apparatus for wet concrete and the like comprising a pair of piston pumps having parallel axes, interlocked to one another and operating in phase opposition, the orifices of which are alternatively put in communication one with the conduit feedi... | 11/30/1976 |
