Famous Patents
The first commercial microwave oven was nearly 6 feet tall and weighed in at 750 pounds.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7731484 | Vacuum pump control device and vacuum device The present invention has an object of controlling power consumption by a vacuum pump by varying the number of revolutions of the vacuum pump in accordance with the operating state of a vacuum device. The condition setting part 4 sets the relationship ... | 06/08/2010 |
| 7316718 | Differential pressure-driven borohydride based generator An arrangement for generating hydrogen gas utilizes differential pressure to transport fuel and spent fuel components without requiring an electrically powered fuel delivery pump. ... | 01/08/2008 |
| 7273560 | Apparatus for condensing and recycling stripper An apparatus for recycling the stripper solutions with higher recycling rate is disclosed. The apparatus includes a stripper condenser; a first buffer tank; a second buffer tank connecting to said stripper condenser by a first pipe and connecting to said first buffe... | 09/25/2007 |
| 7204249 | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage An oxygen concentrator is utilized in combination with a compressor, preferably a radial compressor, to provide a highly enriched and compressed oxygen gas in a mobile container such as a gas cylinder. The combination and method of production provides for the facile... | 04/17/2007 |
| 7127901 | Helium management control system A helium management control system for controlling the helium refrigerant supply from a common manifold supplies a plurality of cryogenic refrigerators with an appropriate helium supply. The system employs a plurality of sensors to monitor and regulate the overall r... | 10/31/2006 |
| 6992265 | Integrated engine welder and electric compressor An integrated welder, generator and compressor unit that includes a housing that at least partially contains components of a welder, generator and an electric compressor. An engine, an electric current generator, and an electric air compressor are at least partially... | 01/31/2006 |
| 6966967 | Variable speed pump control A method and apparatus for monitoring operating characteristics and/or control signals of a system comprising a variable speed vacuum pump. Operating characteristics and/or control signals of the system may be monitored, and the pumping speed of the variable speed v... | 11/22/2005 |
| 6948915 | Oil free screw compressor A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided wi... | 09/27/2005 |
| 6942472 | Head pressure relief assembly A head pressure relief assembly for relieving pressure in the head assembly of an air compressor may include an exhaust valve post formed in the head assembly and an exhaust valve assembly comprised of a flapper valve. An aperture may be formed through the exhaust v... | 09/13/2005 |
| 6920763 | Integration of automated cryopump safety purge An electronic controller is integral with a cryopump and provides an offline solution for purging a cryopump and an exhaust line during unsafe conditions. The electronic controller is responsible for controlling the opening and closing of purge, exhaust purge and ga... | 07/26/2005 |
| 6902378 | Electronically controlled vacuum pump A vacuum system comprises, as an integral assembly, a vacuum pump with drive motor, a purge valve, a roughing valve and an electronic control module. A cryogenic vacuum pump and a turbomolecular vacuum pump are disclosed. The control module has a programmed processo... | 06/07/2005 |
| 6604908 | Methods and systems for pulsed delivery of fluids from a pump A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within... | 08/12/2003 |
| 6461113 | Electronically controlled vacuum pump A vacuum system comprises, as an integral assembly, a vacuum pump with drive motor, a purge valve, a roughing valve and an electronic control module. A cryogenic vacuum pump and a turbomolecular vacuum pump are disclosed. The control module has a programm... | 10/08/2002 |
| 6022195 | Electronically controlled vacuum pump with control module A vacuum system comprises, as an integral assembly, a vacuum pump with drive motor, a purge valve, a roughing valve and an electronic control module. A cryogenic vacuum pump and a turbomolecular vacuum pump are disclosed. The control module has a programm... | 02/08/2000 |
| 5472032 | Tire pressure maintenance system A gas transfer system is provided for establishing or maintaining a predetermined gas pressure within a plenum, such as a tire. In an exemplary embodiment, the gas transfer system includes a power source, a pressure sensor, a control unit, and a gas trans... | 12/05/1995 |
| 5443368 | Turbomolecular pump with valves and integrated electronic controls A vacuum system comprises, as an integral assembly, a turbomolecular pump with drive motor, a vent valve, a purge valve, a roughing valve, a heater and an electronic control module. The control module has a programmed processor for controlling the motor a... | 08/22/1995 |
| 5195874 | Multistage compressor A multistage compressor includes a lower pressure side compression part, a higher pressure side compression part, an intermediate conduit placing the lower and higher side compression parts in communication, and a cooler disposed midway of the intermediat... | 03/23/1993 |
| 5174545 | Contamination resistant bleed valve A bleed valve (20) includes a reciprocating sliding element (42) with a circular head (48) joined to an annular wall (50). An annular first chamber (52) defined by the wall (50), the head (48), and the central support (30) has a variable volume dependent ... | 12/29/1992 |
| 5160244 | Pump system operable by variable-speed control A variable-speed pump system comprising: a hydraulic machine having a flow adjusting means and including at least a pumping function; a rotary machine operatively connected to the hydraulic machine and including at least a motor function for rotating the ... | 11/03/1992 |
| 5147559 | Controlling cone of depression in a well by microprocessor control of modulating valve A method for removing floating immiscible liquids from a well containing both the floating immiscible liquids and water, where the floating immiscible liquids and water meet at a water interface, by controlling a cone of depression within the well. A remo... | 09/15/1992 |
| 4940391 | Compressor surge detection system In a compressor system, surge detection is provided by sensing the current of the motor driving the compressor and reading oscillations of the current about the average thereof and above and below two opposite threshold levels from such average current an... | 07/10/1990 |
| 4664601 | Operation control system of rotary displacement type vacuum pump An operation control system of a rotary displacement type vacuum pump capable of reducing a starting torque of the vacuum pump includes a suction regulating valve and a pressure sensor for monitoring suction pressure located in a suction passage of the va... | 05/12/1987 |
| 4650633 | Method and apparatus for protection of pump systems A control apparatus and method for restricting liquid flow in a liquid moving pump, usually of the centrifugal type, to prevent pump cavitation and pump prime mover overloading. The control apparatus includes sensors to detect liquid temperature and press... | 03/17/1987 |
| 4646224 | Sprinkler controller which computes sprinkler cycles based on inputted data 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 resp... | 02/24/1987 |
| 4560323 | Apparatus for controlling the flow of a fluid An apparatus for controlling flow of a fluid having two speed-controlled positive displacement devices for supplying a load with fluid under pressure from a supply at a different pressure with interposed variable-volume buffer containers.... | 12/24/1985 |
| 4443156 | Automatic natural gas compressor control system A control system for a compressor utilized in transferring natural gas from relatively low pressure wells to a relatively high pressure pipe line incorporating automatic shutdown of the compressor and automatic restart of the compressor in response to cer... | 04/17/1984 |
| 4432698 | Compressor having a starting load reducing apparatus A compressor having a starting load reducing apparatus comprises a main compressor body for compressing gas obtained under suction from an intake chamber through an intake valve within a compression chamber, and ejecting the compressed gas through an outl... | 02/21/1984 |
| 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 |
| 4273513 | Pump failure protection for liquid transmission pipe lines In order to more effectively control the operation of surge valves in pumping stations through relatively long pipelines where liquid is pumped to an elevated discharge circuit and avoid excessive waste of water, where there is provided an electric soleno... | 06/16/1981 |
| 4140436 | Pressure control device for fluid systems A device is provided for monitoring and controlling the above-ambient pressure in a system by comparing a net pressure force, produced by the system pressure on a pair of diaphragms having unequal areas, with a net spring force produced by a pair of oppos... | 02/20/1979 |
| 4135860 | Method and device for controlling the pressure of a working medium delivered by a compressor Method and apparatus for controlling the operation of a motor driven compressor which is automatically unloaded when the receiver pressure reaches a predetermined maximum level and loaded when the receiver pressure reaches a predetermined minimum level by... | 01/23/1979 |
| 4068980 | Compressor startup control A positive displacement gas compressor includes an inlet throttling valve which has an actuator responsive to a pressure fluid signal for closing the throttling valve. A control circuit for supplying pressure fluid to close the throttling valve includes a... | 01/17/1978 |
| 3981618 | Method and apparatus for preventing pump cavitation The speed of an engine driven pump is sensed and compared with the desired maximum operating speed to detect overspeed. The discharge of the pump is controlled by a variable flow rate controller. When an overspeed condition exists, a command signal is sen... | 09/21/1976 |
| 3951568 | Pump check valve control apparatus A pump check valve control apparatus includes a pump for delivering a fluid to a system. A valve between the pump and the system controls the delivery of the fluid to the system. A valve actuator, signalled by an actuator control, begins to open the valve... | 04/20/1976 |
