Adjustable centrifugal pump

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4643639
SERIAL NO

06685472

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An improved pump for efficient operation at low flow rates to avoid undue power consumption and heating of the fluid being pumped. There is provided a centrifugal pump including a housing with an inlet. A radial or mixed flow discharge impeller is rotatably mounted within the housing and an outlet volute extends about the impeller. First and second axially spaced diffusion passages establish fluid communication between the impeller and the volute and a valve is provided for closing one of the passages when low flow rates are demanded of the pump to minimize recirculation, leakage and churning losses consuming the power and leading to heating of the fluid.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
Sundstrand CorporationROCKFORD, IL127

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Caine, Gerard H Rockford, IL 1 21

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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
LUK FAHRZEUG-HYDRAULIK GMBH & CO. KG (1)
* 6213729 Suction-throttled pump 3 1998
 
Other [Check patent profile for assignment information] (3)
* 5807067 Transtator hydraulics device 12 1996
6367738 Aerobatic aircraft 8 2000
* 6431823 Centrifugal pump with variable capacity and pressure 3 2000
 
HOT WATER INNOVATIONS LIMITED (1)
* 2009/0116,958 Variable Pump 2 2006
 
JOHNSON ELECTRIC S.A. (2)
* 8425205 Centrifugal pump 2 2010
* 2010/0322,794 CENTRIFUGAL PUMP 0 2010
 
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (1)
* 5955835 White-light emitting electroluminescent display device and manufacturing method thereof 20 1996
 
HUSCO INTERNATIONAL, INC. (1)
9062665 Hydraulic piston pump with throttle control 0 2013
 
NIDEC MOTOR CORPORATION (2)
* 8575873 Electric motor and motor control 1 2010
* 2012/0032,629 Electric Motor and Motor Control 4 2010
 
TURBOMECA (1)
* 5484261 System for regulating air supply conditions of a turbo shaft machine 1 1995
 
HONEYWELL INTERNATIONAL INC. (4)
8197195 Turbocharger with stepped two-stage vane nozzle 1 2005
* 2008/0317,593 Turbocharger with Stepped Two-Stage Vane Nozzle 4 2005
* 8641363 Turbocharger with integrated actuator 0 2010
* 2012/0171,059 Turbocharger with integrated actuator 4 2010
 
EBARA CORPORATION (2)
7540725 Seal mechanism for fluid machine 0 2004
* 2006/0147,328 Seal mechanism for fluid machine 2 2004
 
EBM-PAPST ST. GEORGEN GMBH & CO. KG (1)
* 8105011 Fan comprising a fan wheel 0 2005
 
KSB AKTIENGESELLSCHAFT (1)
* 5518256 Floating-ring seal 5 1994
 
BAKER HUGHES INCORPORATED (2)
8162600 System, method and apparatus for two-phase homogenizing stage for centrifugal pump assembly 2 2008
* 2009/0155,064 SYSTEM, METHOD AND APPARATUS FOR TWO-PHASE HOMOGENIZING STAGE FOR CENTRIFUGAL PUMP ASSEMBLY 2 2008
 
Sundstrand Corporation (2)
* 4802817 Centrifugal pump with self-regulating impeller discharge shutter 14 1987
* 5235803 Auxiliary power unit for use in an aircraft 27 1992
 
MITSUBISHI HEAVY INDUSTRIES, LTD. (2)
* 8147186 Centrifugal compressor 1 2008
* 2010/0166,539 Centrifugal compressor 2 2008
 
BORGWARNER INC. (2)
* 8590305 Simplified variable geometry turbocharger with variable nozzle 1 2009
* 2011/0232,282 SIMPLIFIED VARIABLE GEOMETRY TURBOCHARGER WITH VARIABLE NOZZLE 2 2009
 
DEGUSSA AG (1)
* 5035611 Apparatus for controlling gas flows in vacuum furnaces 10 1990
 
UNITED TECHNOLOGIES CORPORATION (2)
* 8935926 Centrifugal compressor with bleed flow splitter for a gas turbine engine 0 2010
* 2012/0102,969 CENTRIFUGAL COMPRESSOR WITH BLEED FLOW SPLITTER FOR A GAS TURBINE ENGINE 0 2010
* Cited By Examiner