Quotables
"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 |
| 6352415 | variable capacity hydraulic pump First and second fluid pressure chambers 43 and 44 are formed on both sides of a swingable cam ring 27. A control valve 40 for controlling a swing of the cam ring is provided. To operate the control valve, a variable metering throttle 61 is provided in th... | 03/05/2002 |
| 6227823 | Compressed gas dispensing station with high pressure compressor with internal cooled compression A compressed gas dispensing station having a high pressure gas compressor with a cyclic control system for selective recirculation of cooled, ultra high pressure gas through the compression chamber after the end of the compression stroke for scavenging ho... | 05/08/2001 |
| 6074176 | Proportional product injection circuit with two diaphragm valves A proportional fluid injector apparatus utilizing foaming agents. A pump is connected to a foaming agent and is operably connected to a differential proportional valve having a venturi. A first diaphragm control valve is operably connected between the pum... | 06/13/2000 |
| 5181451 | Control system for longwall face support frames A control system for longwall face support frames as used in mines, the system comprising pushing rams which are adapted to be actuated at two different pressures (for example, a low pressure of about 70 to 120 bar for non-defined cutting and a high press... | 01/26/1993 |
| 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 |
| 4591317 | Dual pump controls Controls for a dual element pump having first and second pumps with separate outputs wherein a modulating valve is positionable to control the amount of fuel delivered by a first pump to a fuel control and additionally to selectively control the utilizati... | 05/27/1986 |
| 4406589 | Compressor A compressor comprises a main compressor body of compressing air, an unloader valve device provided at the suction side of the main compressor body, a bleeding pipe provided between the ejection side of the main compressor body and the unloader valve devi... | 09/27/1983 |
| 4403920 | Device for regulating the output quantity of a compressed medium An improved device for regulating the output a compressor arrangement in which a regulator is connected to a throttled balancing pipe interconnected between the suction and the discharge of the compressor arrangement.... | 09/13/1983 |
| 4396033 | Flow volume control device for a power assisted steering device A flow volume control device for a power assisted steering device having a main control valve device, whose main valve spool is movable to establish the communication of an inlet passage with a bypass passage when the flow rate of pressurized fluid suppli... | 08/02/1983 |
| 4212599 | Method and device for regulating the output quantity of compressed medium of single and multi-stage screw and turbo compressor systems A method of regulating the output quantity of compressed medium of single and multi-stage screw and turbo compressor systems, comprises, throttling the suction to the compressor systems with a throttling valve by fluid-pressure operation of the valve, sen... | 07/15/1980 |
