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| Number | Title | Issue Date |
| 4204808 | Flow control Control of a pumping station is accomplished in such a manner so as to maximize the energy efficiency of the pumping station by utilizing a variable drive pump to maintain the pipeline suction pressure seen at the input to the pumping station at an accept... | 05/27/1980 |
| 4203710 | Unified pump and generator arrangement A combined pump and generator arrangement for use in a vehicle having an engine as the prime mover is disclosed and includes a pump housing with an axially extending actuating shaft and a rotatable member to be driven by the engine to rotate about that ac... | 05/20/1980 |
| 4201521 | Pump and motor assembly An improved pump and motor assembly includes a fluid pump and an electric motor which are accurately positioned relative to each other by a plurality of locating pins which engage the inner surface of a common housing. By using a single reference surface,... | 05/06/1980 |
| 4194870 | Slam prevention in liquid pumping Conventional installations for pumping of liquid LNG (liquefied natural gas) from a sealed tank of a marine vessel to a shore installation commonly include a pump immersed in the liquid, a riser pipe from the pump to a level above the liquid, a stop valve... | 03/25/1980 |
| 4188172 | Method and means for injecting hot liquid when pumping cold liquid A method of and means for introducing a heated liquid into a cold liquid the purpose of improving the pumping rate of the cold viscous liquid is provided. The heated liquid is directed upward into the suction inlet of the cold liquid pump through an ori... | 02/12/1980 |
| 4179242 | Method and apparatus for liquid supply A method and an apparatus for liquid supply use a pressure tank and a plurality of pumps. When the pressure or liquid quantity in the pressure tank has decreased below a predetermined level, a preceding or regular pump starts. When the demand is too large... | 12/18/1979 |
| 4178132 | Method and device for controlling the number of pumps to be operated In a system for controlling the flow rate of water supplied in a multi-pump water supply system which includes a pond or reservoir for the water, a first characteristic curve representing the cumulative values of predicted load flow rates over a period of... | 12/11/1979 |
| 4177016 | Self cleaning manifold connection for slurry pump One or a plurality of positive displacement slurry pumps are connected to common intake and discharge manifolds at a typical slurry pipeline pumping station. Each pump is connected at its inlet by inlet piping from the intake manifold through an intake is... | 12/04/1979 |
| 4173430 | Method of injecting a back filling injection material in a shield forming process A novel method of injecting a back filling injection material employed in a shield-forming process is described herein. A screw type injection pump with a hopper connected to its intake port is utilized. This pump is rotated in a reverse direction to inta... | 11/06/1979 |
| 4167371 | Method of fluid pressurization A method and apparatus for transferring heat regeneratively in a rotating heat exchanger. The heat exchanger provides for the cold gas stream to be heated alternate compression and expansion with heat addition usually during the expansion phase of the com... | 09/11/1979 |
| 4165952 | Heat energized vapor adsorbent pump A solid matrix of microporous adsorbent is utilized to provide a barrier between two bodies of a gaseous mixture of which at least one constituent is a sorbable vapor. Appropriate application of heat at the opposing interfaces of the adsorbent barrier pro... | 08/28/1979 |
| 4158527 | Adjustable speed drive system for centrifugal fan A centrifugal fan provided with dampers is driven by a motor having a speed control circuit. Air flow from the centrifugal fan is controlled from a point of maximum air flow to a predetermined crossover speed only by changing the velocity of the fan impel... | 06/19/1979 |
| 4149827 | Method and apparatus for controlling operation of a compressor A method in which automatic selection of the mode of operation for a compressor unit is achieved and is dependent on the conditions under which the compressor unit is operated. Depending on the existing compressed air demand and the time sequence thereof,... | 04/17/1979 |
| 4147473 | Method of regulating multistage axial compressor output and an axial compressor for carrying same into effect A method of regulating the output of a multistage axial compressor having two coaxial rotors in series. The regulation of the compressor output is effected by varying the head of the medium to be compressed, the variation of the head of the medium being e... | 04/03/1979 |
| 4145161 | Speed control This is a method and apparatus for controlling an oil-well beam pumping unit in a manner which allows increased oil production. The AC electric motor of the beam pumping unit is supplied power through a variable frequency power supply, whose frequency (an... | 03/20/1979 |
| 4142838 | Method and apparatus for preventing surge in a dynamic compressor A control apparatus for antisurge protection of a dynamic compressor including a junction of a closed antisurge loop with a surge limit computing module and a two mode controller with a relay backup system with deviation alarms is characterized in operati... | 03/06/1979 |
| 4138850 | Sorption system for low-grade (solar) heat utilization A system for the effective utilization of low-grade heat sources such as solar energy, with a system including a molecular sieve material such as zeolite and a gaseous fluid adapted to be absorbed by the material which is in a closed container and circuit... | 02/13/1979 |
| 4137011 | Flow control system for liquid chromatographs A flow control system including a pump for delivering a carrier containing isocratic or gradient controlled elution solvents under pressure to a liquid chromatographic column at a substantially constant selected controlled flow rate.... | 01/30/1979 |
| 4132506 | Pressure and volume-flow control for variable pump A hydraulic system has a pump whose outlet is connected to a load and which has a pilot port whose pressurization is proportional to the pressure at the outlet. A restriction is provided between the outlet of the pump and the load. A differential valve is... | 01/02/1979 |
| 4131393 | Fluid pump mechanism A fluid pump mechanism for delivering a smooth output of fluids to a system utilizing at least one piston in a chamber reciprocative therewithin. The piston has strokes that fill and empty the chamber in conjunction with the action of valve means located ... | 12/26/1978 |
| 4127362 | Regulating the flow capacity of a positive displacement pump by controlling inlet valve means A piston pump includes a fluid flow control system positioned between the fluid intake duct and the intake aperture of the piston cylinder, the control system including a cylindrical sleeve which is in fluid communication with the intake duct, a valve pis... | 11/28/1978 |
| 4120612 | Automatic pump for deep wells An automatic pump for deep wells comprises a long stroke reciprocating pump having its piston normally in its bottom position and an automatic control dependent upon the collection of a predetermined amount of liquid in the pump cylinder above the piston ... | 10/17/1978 |
| 4120613 | Pump for molten lead, particularly injection pump used in the manufacture of storage battery plates To prevent the formation of deposits of lead dross and the like due to oxidation of the molten lead, at least a portion of elements defining the pump chamber, for example the cylinder, and the piston are made as an iron casting which has been subjected to... | 10/17/1978 |
| 4108575 | Obtaining desired flow rate from roller pump despite varying the hose means A roller pump having one or more hoses is combined with a control system including a potentiometer for controlling the speed of the pump motor. A manually settable control provides an output corresponding to the diameter of the hose, and a further control... | 08/22/1978 |
| 4105368 | Floating wave powered pump A hydraulic power source for harnessing energy generated by the wave motion of a body of water. A primary or main float has a plurality of secondary or satellite floats spaced outwardly therefrom. The secondary floats are each attached to one end of a plu... | 08/08/1978 |
| 4087206 | Subsurface pumping unit incorporating heavy duty reversing valve and method of operating 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 r... | 05/02/1978 |
| 4086029 | Method and apparatus for flushing the plunger of a positive displacement pump A method and apparatus for flushing the plunger of a positive displacement pump which handles a suspension of abrasive particles. Flush liquid is introduced at two or more locations to the packing surrounding the pump plunger. The larger volume of flush l... | 04/25/1978 |
| 4080107 | Bellows pump and pumping plant for oil-filled electric cables A pump for pumping insulating oil for oil-filled electric cables in which a driven piston is within and spaced from a tubular bellows which is surrounded by an enclosure. The bellows forms a chamber with the enclosure which contains the cable oil, and the... | 03/21/1978 |
| 4080106 | Purged valve assembly and method of sealing A purged valve assembly and method of sealing for a liquid transmitting casing that extends into a storage reservoir for liquid or liquified gases. The assembly includes a normally closed spring-biased foot valve mounted on the lower end of the casing. A ... | 03/21/1978 |
| 4077743 | Compression machinery method and apparatus Compression machinery including a low pressure stage, a high pressure stage and a single aftercooler, further includes a bypass path through which fluid discharged from the low pressure stage is directed about the high pressure stage. The bypass path incl... | 03/07/1978 |
| 4076457 | Downhole pump speed control This is a method and apparatus for controlling a downhole, hydraulically actuated pump. Two fluid flow monitoring means generate signals which are a function of the power fluid flow rate to the downhole pump and the return fluid flow rate from the well. A... | 02/28/1978 |
| 4073080 | Method of underwater hydraulic conveying for ocean mining and the like Minerals or other bodies are lifted hydraulically from a region below the surface of a free fluid medium, such as the ocean. An at least partly gas-filled chamber with an elongated conduit extending therefrom is at least partially submerged in the fluid m... | 02/14/1978 |
| 4063853 | Noise dampening means in refrigeration motor-compressor units and method A motor-compressor unit is resiliently mounted within a shell defining a lubricating oil sump. The compressor includes a primary oil pump having its inlet submerged in the oil sump to pump said oil to lubricate various compressor components. A secondary o... | 12/20/1977 |
| 4060339 | Method and apparatus for controlling a gas-producing facility A method and apparatus for controlling a multiple-plant gas-producing facility which is subject to wide variations in the demand for its output. The invention is particularly applicable to an oxygen-producing facility for a steelmaking operation in which ... | 11/29/1977 |
| 4043129 | High temperature geothermal energy system Method and apparatus for controlling a well providing access to an underground source of high temperature geothermal brine against flashing as the hot brine is delivered upwardly through the well to surface power apparatus for use of heat from the brine i... | 08/23/1977 |
| 4026661 | Hydraulically operated sucker rod pumping system The method and apparatus for producing an oil well, by the provision of a pumpjack unit which reciprocates an engine assembly located within the upper extremity of a wellbore. The engine assembly has a power piston which hydraulically drives a lift piston... | 05/31/1977 |
| 3999891 | Pump using spaced sequential displacements along a flexible tube A method of pumping fluid through a hose by means of progressively sequentially momentarily causing adjacent portions thereof to contract is disclosed. A rotary and a linear pump construction are described.... | 12/28/1976 |
| 3998568 | Pump-off control responsive to time changes between rod string load A pump-off control unit for use in conjunction with a motor driven pumpjack assembly which is connected to reciprocate a downhole production pump. A current transformer connected to the pumpjack motor compares the time interval of a no-load portion of the... | 12/21/1976 |
| 3981624 | Sonic or energy wave generator and modulator A sonic or energy wave generator to create and transmit sonic or energy waves of controllable and variable characteristics and which may be utilized to transport sensible heat at sonic velocities to sonic wave or heat reception locations. Self induced or ... | 09/21/1976 |
| 3972649 | Method of peristaltic pumping and device for working by such method In pumping devices based on the known principle of peristaltic movement the flexible tube conveying the fluid is regularly advanced while the pump is operating. In a peristaltic pump working by the aforesaid principle the tube is provided with a prolongat... | 08/03/1976 |
