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| Number | Title | Issue Date |
| 7165953 | Device for conveying a liquid A device for conveying a liquid, in particular a cutting liquid from a machining operation containing production residues. The device includes a vertical pump having a pump housing (14), a pump impeller (13), a drive shaft (19) surrounded by a h... | 01/23/2007 |
| 7121919 | Chemical mechanical polishing system and process Chemical mechanical polishing (CMP) systems and methods are provided herein. One aspect of the present subject matter is a polishing system. One polishing system embodiment includes a platen adapted to receive a wafer, and a polishing pad drum that has a cylindrical... | 10/17/2006 |
| 7121813 | Reverse rotation preventing structure of centrifugal compressor The invention relates to a reverse rotation preventing structure of a centrifugal compressor. The reverse rotation preventing structure of the centrifugal compressor comprises: a discharge pipeline of the centrifugal compressor; a suction pipeline of the centrifugal... | 10/17/2006 |
| 7118321 | Air cooled bearing An air cooled bearing comprising means for imparting a swirl component to the cooling air flowing toward the bearing. By imparting a swirl component to the cooling air the amount of work imparted on the cooling air by the rotating cage and rolling elements of the be... | 10/10/2006 |
| 7094016 | Multi-phase flow pumping means and related methods A method of pumping and related arrangement for multi-phase fluid flow wherein a centrifugal pump is used for the suction and delivery of the multi-phase fluid which has a fluid communication providing portion to provide a communication of fluid bled from the outlet... | 08/22/2006 |
| 7074014 | Dipping type pump where discharging performance at a time of actuation has been improved In a dipping type pump where a rotary shaft extending from a motor into a pump casing disposed in liquid is mounted with impellers, and liquid is sucked from a sucking port at a lower portion of the casing and discharged from a discharge port by rotational driving o... | 07/11/2006 |
| 7059824 | Self priming centrifugal pump A centrifugal pump comprising a pump body (1) housing an impeller (3) keyed onto a motor shaft (4) and provided with a suction mouth (7) and a discharge mouth (8) capable of being made to communicate with, respectively, a suction p... | 06/13/2006 |
| 7025557 | Secondary flow control system The present invention is a system (20) for controlling various fluid flows, e.g., secondary fluid flows including cavitating fluid flows, typically developed along the shroud line and usually in or around a leading edge (21) within a flow channel (2... | 04/11/2006 |
| 6844094 | Gas-supplying apparatus for fuel cell A gas-supplying apparatus for a fuel cell, which generates electric power due to an electrochemical reaction between oxygen and hydrogen, during which water is produced, and which has respective gas passages within the duel cell according to the present invention co... | 01/18/2005 |
| 6623239 | Turbocharger noise deflector A turbocharger having a bypass port compressor, with a center channel that flows directly into the compressor wheel, and an annular channel which acts as a bypass and provides flow either into or out of the compressor wheel, with an inner deflector having... | 09/23/2003 |
| 6447241 | Method and apparatus for expanding operating range of centrifugal compressor In a centrifugal compressor, a housing is provided which has an annular treatment cavity in a shroud wall. The shroud wall has a first opening providing communication between an installed zone of an impeller and the treatment cavity, and a second opening ... | 09/10/2002 |
| 6419443 | Glass product machining apparatus A glass product machining apparatus comprises a grindstone rotatable around an axis by means of a motor, moving table movable under the grindstone in the cross direction of the grindstone, frame for supporting the grindstone for up-and-down motion, lift, ... | 07/16/2002 |
| 6394764 | Gas compression system and method utilizing gas seal control A gas compression system and method according to which product gas is introduced into and compressed in, a compressor. A portion of the compressed gas is discharged to external equipment, and a portion of the gas is trapped in response to deactivation of ... | 05/28/2002 |
| 6357234 | Turbocharger system with turbines having independently controlled variable nozzles A turbocharger system for an internal combustion engine is provided with a plurality of turbochargers. Each turbocharger includes a rotatable shaft; a turbine having turbine wheel carried by the shaft, an inlet and a variable nozzle at the inlet; and a mu... | 03/19/2002 |
| 6324848 | Turbocharger system to inhibit surge in a multi-stage compressor A turbocharger system for an internal combustion engine is provided with at least one rotatable shaft and a multi-stage compressor. The multi-stage compressor includes a first compressor wheel carried by a corresponding shaft, an axially extending first i... | 12/04/2001 |
| 6293103 | Turbocharger system to inhibit reduced pressure in intake manifold An internal combustion engine is provided with at least one intake manifold and a turbocharger. The turbocharger includes a rotatable shaft; a turbine having a turbine wheel carried by the shaft; and a multi-stage compressor. The multi-stage compressor in... | 09/25/2001 |
| 6234168 | Dosimeter An apparatus for measuring doses of dispensed products includes a first metering ring (20) mounted to rotate 5 around a rotation axis (1), and drive means (10) that drives the first metering ring to rotate around an axis (1). The drive means (10) is actua... | 05/22/2001 |
| 5993151 | Centrifugal pump device The invention relates to a centrifugal pump device, comprising a pump casing (1) having an inlet (2) and an outlet (3), an impeller device inside the casing (1) having one or more pump stages (5-7) with a common rotary shaft (4), and a non-return valve (8... | 11/30/1999 |
| 5782603 | Process and apparatus for recovery from rotating stall in axial flow fans and compressors Active recovery from a rotating stall operating condition in an axial flow compression system is accomplished by altering the temperature and/or density of the working fluid flowing in the inlet of the compression system once rotating stall is detected. A... | 07/21/1998 |
| 5709526 | Surge recurrence prevention control system for dynamic compressors A control system prevents recurrence of surge in a dynamic compressor. An anti-surge valve bypasses flow and is operated by the control system between a low limit and a full open position. The low limit is initially established to be zero, or a fully clos... | 01/20/1998 |
| 5557917 | Engine stall and distortion suppression system A method is provided for equalizing fluid pressure in a primary fluid flow region, comprised of providing a modulating fluid flow region adjacent to the primary flow region and separating the two regions with a perforated wall. By controlling the fluid pr... | 09/24/1996 |
| 5290142 | Method of monitoring a pumping limit of a multistage turbocompressor with intermediate cooling A method of operating a multistage turbocompressor or of monitoring the pump limit thereof, whereby the pump limit function is stored in the control unit in the form Y=m.F+b and the coefficients m and b are determined by the linear relationships m=m0... | 03/01/1994 |
| 5059091 | Gas turbine engine compressor assembly A compressor assembly (12,13) for a gas turbine engine (10) comprises a centrifugal compressor (12) having a variable cross-sectional area diffuser (13) located at its downstream end. When the cross-sectional area of the diffuser (13) is less than a maxim... | 10/22/1991 |
| 4971516 | Surge control in compressors Method and apparatus for operating compressors to avoid surges. The compressor is controlled by direct measurement of the rate of volumetric flow, Q, of gas through the compressor via the use of an acoustic flow meter, or other sonic velocity measuring de... | 11/20/1990 |
| 4825380 | Molecular weight determination for constraint control of a compressor A supervisory computer is provided for controlling a compressor wherein a computer generated set point manipulates flow in a recycle line from the compressor outlet to inlet. The supervisory computer manipulates the recycle flow so as to prevent the compr... | 04/25/1989 |
| 4807150 | Constraint control for a compressor system A supervisory computer for a centrifugal compressor control system is disclosed which manipulates the set point of a controller for a valve in a recycle line from the compressor systems outlet to inlet. The supervisory computer manipulates the set point s... | 02/21/1989 |
| 4804313 | Side channel self priming fuel pump having reservoir A side channel pump (10) has a pumping cavity (26) which includes an inlet port (78), a discharge port (80) and side channels (72,74). An impeller (54) is mounted for rotation in the pumping cavity. A reservoir (20) holds an ample supply of liquid for pum... | 02/14/1989 |
| 4780050 | Self-priming pump system To achieve priming during start-up and repriming during operation, a self-priming pump system is provided. The self-priming pump system includes a discharge priming reservoir for storing priming liquid for a pump. The discharge priming reservoir has an in... | 10/25/1988 |
| 4740137 | Method and apparatus for improving the efficiency of centrifugal pumps The pump system provides for a more efficient operation of multistage centrifugal pumps operating at less than designed capacity. The system includes a flow meter located in the inlet conduit to the pump, a control valve is located in a discharge conduit ... | 04/26/1988 |
| 4697980 | Adaptive gain compressor surge control system An adaptive gain surge control system (18) is disclosed for a centrifugal compressor (14) which reacts to both normal and emergency surge conditions by controlling a bypass valve (48) across the compressor (14) inlet and outlet in response to a variable g... | 10/06/1987 |
| 4653978 | Relief valve system A relief valve system for a pump in which control means are responsive to the occurrence of an excessive pressure on the inlet or discharge side of the pump to relieve this condition by dumping excess pressure to atmosphere.... | 03/31/1987 |
| 4627788 | Adaptive gain compressor surge control system An adaptive gain surge control system (18) is disclosed for a centrifugal compressor (14) which reacts to both normal and emergency surge conditions by controlling a bypass valve (48) across the compressor (14) inlet and outlet in response to a variable g... | 12/09/1986 |
| 4618310 | Method of multi-stage compressor surge control As an improvement in an anti-surge control method for a multi-stage centrifugal compressor having interstage coolers, this invention comprises, when there is an imbalance of stage flows relative to surge, replacing recycle with warm expanded gas to the ma... | 10/21/1986 |
| 4521156 | Self-priming pump system having diaphragm-type flow sensor A self-priming system for liquid pumps wherein a priming valve is provided to convey a quantity of priming liquid to the pump upon loss of pump suction. A pilot valve is provided to regulate the pressure against a piston which serves to maintain the primi... | 06/04/1985 |
| 4494560 | Self-priming system for liquid pumps A self-priming pump system incorporating a priming valve to release a quantity of priming liquid upon loss of pump suction. The valve includes a piston connected to a valve member, the piston having an area greater than that of the valve member. Discharge... | 01/22/1985 |
| 4493607 | Tee-type valve for self-priming pump system A self-priming system for liquid pumps wherein a priming valve is provided to convey a quantity of priming liquid to the pump upon loss of pump suction. A pilot valve is provided to regulate the pressure against a piston which serves to maintain the primi... | 01/15/1985 |
| 4493608 | Surge control in compressor A steam generation system employing a flash tank feeding low-pressure steam to a compressor controls surges in the compressor by calculating the amount of steam generated based on the temperature change and flow of water passing through the flash tank and... | 01/15/1985 |
| 4465428 | Pipe fitting and method for draining a hydrotherapy pump A pipe fitting for attachment to a hydrotherapy pump has an inlet and outlet having parallel offset axes, with a separate small hollow nipple extending from and communicating with the inlet. The nipple attaches to the pump at a location normally occupied ... | 08/14/1984 |
| 4464720 | Centrifugal compressor surge control system A surge control system is disclosed for centrifugal compressors which utilizes an algorithm to calculate a desired orifice differential pressure and compare the calculated result with an actual differential pressure. A controller is provided for operating... | 08/07/1984 |
| 4462766 | Device for automatic circulation in a waste water pump station The pump unit (2) is provided with a valve (6) at the pressure side, which is arranged to open a connection between the pump and the pump station thus obtaining a circulation. The valve is arranged at the upper side of the pump housing and the outlet of t... | 07/31/1984 |
