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Class Information
Number: 415/1
Name: Rotary kinetic fluid motors or pumps > Method of operation
Description: Process of ACQUISITION PROCUREMENT PLAN.










Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Patent Number Title Of Patent Date Issued
5754446 Method and apparatus for optimizing performance of a kaplan turbine May. 19, 1998
5743714 Method and apparatus for minimum work control optimization of multicompressor stations Apr. 28, 1998
5743715 Method and apparatus for load balancing among multiple compressors Apr. 28, 1998
5709526 Surge recurrence prevention control system for dynamic compressors Jan. 20, 1998
5676526 Method of eliminating bubbles in a medical centrifugal pump using speed variations Oct. 14, 1997
5658125 Magnetic bearings as actuation for active compressor stability control Aug. 19, 1997
5653577 Turbine, in particular Francis turbine Aug. 5, 1997
5615996 Method for prediction of the performance of a centrifugal pump with a thrust balance mechanism Apr. 1, 1997
5609465 Method and apparatus for overspeed prevention using open-loop response Mar. 11, 1997
5605437 Compressor and method of operating it Feb. 25, 1997
5599161 Method and apparatus for antisurge control of multistage compressors with sidestreams Feb. 4, 1997
5553995 Method of driving a turbine in rotation by means of a jet device Sep. 10, 1996
5551837 Apparatus for regulating the transport flow of a liquid that is circulated by a centrifugal pump in a closed pipe system Sep. 3, 1996
5547337 Method and closed-loop control device for the closed-loop control of a turbine-generator configuration Aug. 20, 1996
5525032 Process for the operation of a fluid flow engine Jun. 11, 1996
5508943 Method and apparatus for measuring the distance of a turbocompressor's operating point to the surge limit interface Apr. 16, 1996
5464591 Process and apparatus for controlling and metering the pneumatic transfer of solid particulates Nov. 7, 1995
5388956 Fan assembly and method for reducing fan noise Feb. 14, 1995
5372474 Gravity-assisted rotation device Dec. 13, 1994
5347467 Load sharing method and apparatus for controlling a main gas parameter of a compressor station with multiple dynamic compressors Sep. 13, 1994
5346359 Method of adjusting a wicket gate Sep. 13, 1994
5340271 Flow control method and means Aug. 23, 1994
5330318 Centrifugal pump with an improved axial diffusor Jul. 19, 1994
5322412 Method and apparatus for optimizing the operating parameters of a double-regulated water turbine Jun. 21, 1994
5312226 Turbo compressor and method of controlling the same May. 17, 1994
5290142 Method of monitoring a pumping limit of a multistage turbocompressor with intermediate cooling Mar. 1, 1994
5275528 Flow control method and means Jan. 4, 1994
5256031 Device and method for reducing one or more resonant vibrations of rotor blades in turbomachines Oct. 26, 1993
5242263 Device for the control of anti-surge of a compressor Sep. 7, 1993
5167484 Method for thrust balancing and frame heating Dec. 1, 1992
5145314 Low drag pitot pump and method of operating same Sep. 8, 1992
5131805 Dual axis fluid current motor Jul. 21, 1992
5046919 High efficiency turboexpander Sep. 10, 1991
5012420 Active clearance control for gas turbine engine Apr. 30, 1991
5002459 Surge control system Mar. 26, 1991
4971519 Method and apparatus for pumping high consistency medium Nov. 20, 1990
4971516 Surge control in compressors Nov. 20, 1990
4958985 Performance low pressure end blading Sep. 25, 1990
4949276 Method and apparatus for preventing surge in a dynamic compressor Aug. 14, 1990
4944652 Process and device for the control of turbo compressors Jul. 31, 1990
4940383 System for admitting steam into a turbine Jul. 10, 1990
4938658 Method of reliably operating turbocompressors Jul. 3, 1990
4921399 Gas pipeline temperature control May. 1, 1990
4907943 Method and apparatus for assessing thrust loads on engine bearings Mar. 13, 1990
4904158 Method and apparatus for cryogenic liquid expansion Feb. 27, 1990
4898512 Apparatus and method for reducing effects of draft tube pressure fluctuations Feb. 6, 1990
4831534 Method and apparatus for controlling turbocompressors to prevent May. 16, 1989
4831535 Method of controlling the surge limit of turbocompressors May. 16, 1989
4796213 Method of filtering signals for a controller of a turbo compressor Jan. 3, 1989
4789298 Method and apparatus for controlling the operation of a turbocompressor Dec. 6, 1988

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