| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Double vacuum pump apparatus, gas purification system provided with double vacuum pump apparatus, and exhaust gas vibration suppressing device in double vacuum pump apparatus | US13518257 | 2010-12-22 | US08715400B2 | 2014-05-06 | Kazuo Haruna; Kiyokazu Maruta; Hidenori Kuwata; Koichi Shima |
| A double vacuum pump apparatus (Y2) includes positive displacement vacuum pumps (40A, 40B) and lines (52, 60). Each of the vacuum pumps includes a suction port (41) and a discharge port (42), and a pressure detector (80) is provided in the vicinity of the suction port (41) of the double vacuum pump apparatus (Y2). The line (52) connects the discharge port (42) of the vacuum pump (40A) to the suction port (41) of the vacuum pump (40B). The line (60) has an end (E6) and an end (E5) that are connected to the connection line (52), and includes a buffer tube (Z1) and an on-off valve (61) located between the tube (Z1) and the end (E5). A pressure detection signal from the pressure detector (80) is used as an on/off signal for the on-off valve (61). | ||||||
| 182 | Portable Hydrostatic Test Pump | US13874944 | 2013-05-01 | US20130330218A1 | 2013-12-12 | James A. Marcum; Michael B. McMullen |
| A portable hydrostatic test pump and a system incorporating the portable hydrostatic test pump to pressurize a closed piping system for leak testing purposes is described herein and illustrated in the accompanying figures. The portable hydrostatic test pump includes a compact, lightweight, low power pump module operable using a portable power source. This allows the portable hydrostatic test pump to be used for testing closed piping systems located in areas that are physically difficult to access and/or without access to a permanent power source. | ||||||
| 183 | Thermally efficient multiple stage gear pump | US12931830 | 2011-02-11 | US08596991B2 | 2013-12-03 | William H. Dalton |
| A multiple stage pump for delivering fuel to an engine is disclosed which includes a pump housing, a boost stage operable at engine start to draw fuel into the pump housing at a boost stage pressure, a first pumping stage operable upon engine start for receiving fuel from the boost stage and delivering the fuel from the pump housing to a fuel metering unit, a second pumping stage operable upon engine start and during engine cruise operation for receiving fuel from the boost stage and delivering the fuel from the pump housing to said fuel metering unit, and a switching valve in fluid communication with the first and second pumping stages, and configured to control fuel flow through the first pumping stage in dependence on changes in boost stage conditions such as pressure or shaft speed. | ||||||
| 184 | SYSTEM AND METHOD FOR MONITORING AND CONTROL OF CAVITATION IN POSITIVE DISPLACEMENT PUMPS | US13432625 | 2012-03-28 | US20130259707A1 | 2013-10-03 | Dan Yin |
| A system and method are disclosed for monitoring and controlling a positive displacement pump using readings obtained from a plurality of pressure sensors. The pressure sensors may be mounted at the suction, discharge and interstage regions of the pump. Signals from the pressure sensors are compared to obtain a ratio that is used to predict whether a cavitation condition exists within the pump. The ratio can be compared to user provided limits to change an operating characteristic of the pump to reduce predicted cavitation. The pump may be stopped, or pump speed changed, when the ratio is less than a predetermined value. In some embodiments, historical information regarding the ratio may be used to obtain standard deviation information which may then be used to predict whether gas bubbles are passing through the pump. Other embodiments are described and claimed. | ||||||
| 185 | Adjusting valve for adjusting the delivery volume of a displacement pump | US12171559 | 2008-07-11 | US08523535B2 | 2013-09-03 | Christof Lamparski; Jürgen Bohner |
| An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the valve piston, and an adjusting device serving to adjust the valve piston in the direction of or counter to the force exerted by the valve-actuating pressure. A displacement pump exhibiting an adjustable delivery volume, includes a pump casing, a delivery chamber formed in the pump casing and a delivery member and the adjusting valve for adjusting the delivery volume, arranged in a flow of the fluid delivered by the delivery member. | ||||||
| 186 | Control system and method for pump output pressure control | US13524490 | 2012-06-15 | US08496445B2 | 2013-07-30 | David R. Shulver; Matthew Williamson; Adrian Cioc |
| A pump system includes pump having a control feature which, responsive to a supply of pressurized working fluid, reduces the pressure of the working fluid pressurized by the pump. The control feature is connected to the output of the pump by a regulating valve. The control feature receives pressurized working fluid to decrease the output of the pump in response to the pressure of the supplied working fluid. A regulating valve selectively connects the pressurized working fluid to the control feature. The regulating valve has a control port to receive pressurized working fluid from the pump to urge the valve to a closed position against a biasing force. A controllable valve is operable to interrupt the supply of pressurized working fluid to control port to alter the output pressure of the pump. | ||||||
| 187 | COMPRESSOR DIGITAL CONTROL FAILURE SHUTDOWN ALGORITHM | US13672759 | 2012-11-09 | US20130121843A1 | 2013-05-16 | Ryan J. Dotzenrod; Alan D. Gustafson; YoungChan Ma; Titilope Z. Sule; Herman H. Viegas |
| A method of controlling the loading and unloading of a compressor includes selectively loading and unloading a compressor by engaging and disengaging, respectively, compressor members with the controller in response to system load data, monitoring at least one of the discharge pressure and the suction pressure at a predetermined time interval for a continuous time period, storing values based on the at least one of the discharge pressure and the suction pressure during the continuous time period, and determining a predetermined value indicative of compressor operation in which the compressor members are engaged. The method further includes comparing at least one of the stored values with the predetermined value and providing a signal to cease operation of the compressor when the comparison fails to indicate compressor operation in which the compressor members are engaged. | ||||||
| 188 | DELIVERY UNIT | US13637393 | 2011-03-11 | US20130089455A1 | 2013-04-11 | Marian Kacmar; Oliver Laforsch; Dieter Amesoeder |
| Delivery units are already known, having a drive rotor and an output rotor driven by the drive rotor, which are rotatably mounted in a rotor housing and interact in a meshing manner via spur toothing in each case, at least one of the two rotors being axially adjustable and, on the rear side thereof, facing away from the other rotor, having a compensating pressure applied via a compensation channel. The compensating pressure acts firstly counter to the axial compressive forces which arise in the working chambers formed between the rotors, and secondly compensates for the forces which would force the two rotors apart. This ensures that the distance between the rotors does not change. The compensating pressure frequently corresponds to the pressure on the pressure side of the delivery unit, which means that the forces on the rotors are considerably higher than necessary. This leads to increased friction in the bearings and between the rotors. The rear side of the rotors can also be supplied via slot flows. This has the disadvantage that an undefined compensating pressure is established, which depends on the leakage flows which flow into the space or out of the space behind the rotor. In addition, in this embodiment the compensating pressure does not have the ideal value for low-friction operation. In the delivery unit according to the invention, a defined compensating pressure is established on the rear side of the axially adjustable rotors. The invention provides for a control valve (14) to be provided, which sets the compensating pressure to a predetermined value between a pressure on the pressure side and a pressure on the suction side. | ||||||
| 189 | VACUUM PUMPING SYSTEM | US13695916 | 2011-03-30 | US20130071274A1 | 2013-03-21 | Michael Andrew Galtry; David Alan Turrell |
| The present invention relates to a vacuum pumping system (10) for evacuating a vacuum chamber (12), the system comprising: a vacuum pump (16); and a plurality of forelines (22, 24) for conveying gas to the vacuum pump wherein in a first low vacuum stage of chamber evacuation a first foreline arrangement (22) can be connected for conveying gas to the vacuum pump and in a second higher vacuum stage of chamber evacuation a second foreline arrangement (22, 24) comprising one or more of said forelines can be connected for conveying gas to the vacuum pump, wherein the second foreline arrangement has a total cross-sectional area for conveying fluid which is larger than a total cross-sectional area of the first foreline arrangement. | ||||||
| 190 | VARIABLE DISPLACEMENT LUBRICANT PUMP | US13582460 | 2010-03-05 | US20130039790A1 | 2013-02-14 | Carmine Cuneo; Giacomo Armenio |
| A variable displacement lubricant pump includes a first plunger which pushes a shiftable control ring into a high pumping volume direction. A pump rotor comprises radially slidable vanes which rotate in the control ring. A pressure control system comprises a first pressure control chamber wherein a first plunger is axially moveable. A first pressure conduit connects a pump outlet port with the first pressure control chamber. A first pressure control valve controls a pressure in the first pressure control chamber. A second pressure control valve between an outlet opening in a side wall of the first pressure control chamber and a low pressure source controls the outlet opening and is a centrifugal valve mechanically connected with the pump rotor which closes at a high rotational speed of the pump rotor. The outlet opening is closed by the first plunger in a low pumping volume position and opened in a high pumping volume position. | ||||||
| 191 | Pumps and pump-heads comprising internal pressure-absorbing member | US12201983 | 2008-08-29 | US08323008B2 | 2012-12-04 | David J. Grimes; Keith J. Wardle |
| An exemplary pump includes a pump housing defining a pump cavity, a movable pumping member situated in the pump cavity, and at least one pressure-absorbing member located inside the pump housing. The housing also has an inlet and an outlet, and includes at least one interior non-wearing location that contacts liquid in the pump housing when the pump housing is primed with the liquid. The movable pumping member, when driven to move, urges flow of the liquid from the inlet through the pump cavity to the outlet. The at least one pressure-absorbing member is located inside the pump housing at the non-wearing location and contacts the liquid. The pressure-absorbing member has a compliant property to exhibit a volumetric compression when subjected to a pressure increase in the liquid contacting the pressure-absorbing member, the volumetric compression being sufficient to alleviate at least a portion of the pressure increase. | ||||||
| 192 | Installation for high pressure compression with several stages | US11991067 | 2006-09-01 | US08277197B2 | 2012-10-02 | Patrick Marcel Augustin Lelong; Hans Theo Magits |
| A multi-stage compression installation is formed of a main pipe (2) emerging in a baffle plate (3), where at least two compressors (4, 5) are mounted in series each having its own drive member (9, 10). The installation is equipped with a system for determining the pressure at the output of the main pipe (2), the installation being connected to a control box (8). Typically, the control box (8) is connected to at least two of the drive members (9, 10) of the compressors (4, 5) and ensures monitoring of the compressors such that the latter rotate jointly whether charged or uncharged. Thus, the compressors (4, 5) are jointly charged based on the pressure prevailing in the baffle plate (3), such that the charging of the compressor representing the overpressure stage, the compressor(s) of the lower compression stages are automatically and jointly charged. | ||||||
| 193 | ROTARY VANE ENGINES WITH MOVABLE ROTORS, AND ENGINE SYSTEMS COMPRISING SAME | US12342993 | 2008-12-23 | US20120048230A1 | 2012-03-01 | David S. Darrow |
| Embodiments of rotary vane engines include rotors that rotate about an axis of rotation. The rotors can be moved in directions substantially perpendicular to the axis of rotation to vary expansion and/or compression ratios of the rotary vane engines. The ability to vary the expansion and/or compression ratios can facilitate optimization of the performance of the rotary vane engines as operating conditions vary. | ||||||
| 194 | Compressor diagnostic and protection system and method | US11098582 | 2005-04-04 | US07878006B2 | 2011-02-01 | Hung M. Pham |
| A system and method includes a compressor operable in a refrigeration circuit and including a motor, a current sensor detecting current supplied to the motor, a discharge line temperature sensor detecting discharge line temperature of the compressor, and processing circuitry receiving current data from the current sensor and discharge line temperature data from the discharge line temperature sensor and processing the current data and the discharge line temperature data to determine a capacity of the refrigeration circuit. | ||||||
| 195 | Controller for a variable displacement feed pump | US11849293 | 2007-09-02 | US07802971B2 | 2010-09-28 | Willi Schneider; Torsten Helle |
| The disclosure relates to a feed pump for hydraulic media having an input and an output. A pressure-reducing element is connected to the output, at the output of the element the system pressure being present and the output being connected to a consumer, wherein the output is connected to the first input of a pump controller, the second input being connected to the output of the pressure-reducing element, and wherein the pump controller adjusts the feed pump toward maximum delivery if the system pressure is smaller than a minimum pressure or if the system pressure is smaller than the feed pressure, and wherein parallel to the pump controller a pressure limiter is switched such that at the first input thereof the feed pressure is present and at the control input the system pressure is present, wherein the pressure limiter opens if the feed pressure is greater than a desired value. | ||||||
| 196 | METHOD OF OPERATING A PUMPING SYSTEM | US11883616 | 2006-01-23 | US20100047080A1 | 2010-02-25 | Simon Harold Bruce |
| A pumping system for evacuating an enclosure comprises a pumping mechanism (30), a motor (32) for driving the pumping mechanism, and a controller (36) for controlling the motor. The controller sets a maximum value for a rotational frequency of the motor and a maximum value for a current in the motor, and, to optimise the performance of the pumping system, independently adjusts the maximum values during evacuation of the enclosure. | ||||||
| 197 | Fluid displacement apparatus having pressure sensing device | US12008020 | 2008-01-08 | US20090175749A1 | 2009-07-09 | Henry C. Chu |
| A fluid displacement apparatus includes a housing for receiving a refrigerant, a driving shaft rotatably received in the housing, a magnetic clutch attached to the driving shaft for rotation transmitting purposes, a fixed scroll disposed in the housing, an orbiting scroll rotatably received and engaged in the housing and interfitting with the fixed scroll for compressing the refrigerant and for generating a pressurized refrigerant, the housing includes a compartment communicating with the inner chamber of the housing with a passage for receiving a pressure sensing device which may sense the pressure of the pressurized refrigerant for detecting whether the refrigerant in the housing is over pressure or not. | ||||||
| 198 | ADJUSTING VALVE FOR ADJUSTING THE DELIVERY VOLUME OF A DISPLACEMENT PUMP | US12171559 | 2008-07-11 | US20090041605A1 | 2009-02-12 | Christof Lamparski; Jurgen Bohner |
| An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the valve piston, and an adjusting device serving to adjust the valve piston in the direction of or counter to the force exerted by the valve-actuating pressure. A displacement pump exhibiting an adjustable delivery volume, includes a pump casing, a delivery chamber formed in the pump casing and a delivery member and the adjusting valve for adjusting the delivery volume, arranged in a flow of the fluid delivered by the delivery member. | ||||||
| 199 | MULTI-STAGE GAS COMPRESSING APPARATUS | US12106524 | 2008-04-21 | US20080273989A1 | 2008-11-06 | Hiroshi Inoue |
| A multi-stage gas compressing apparatus comprises a primary gas compressor and a secondary gas compressor. A gas compressed in the primary gas compressor is transferred to the secondary gas compressor in which the gas is further compressed. A detector detects upper and lower limits of discharge pressure from the secondary gas compressor, and a signal is sent from the detector to a control device connected to the primary and secondary gas compressors. Then, the primary and secondary gas compressors are started or stopped by the control device. | ||||||
| 200 | ROTARY COMPRESSOR UNIT AND METHOD OF CONTROLLING OPERATION THEREOF | US12058902 | 2008-03-31 | US20080240953A1 | 2008-10-02 | Hideyuki KIMURA |
| The compressor unit having at least two compressors, for example a low pressure stage compressor 11 and a high pressure stage compressor 12 connected in series, of which the low pressure sage compressor 11 and high pressure stage compressor 12 are driven by driving devices 13 and 14 respectively separately or driven by a single driving device 41 via variable speed gears 43 and 44 respectively connected to each of the compressors, and rotation speed of the low pressure stage compressor 11 and that of the high pressure stage compressor 12 are controlled independently in accordance with various operating conditions of the compressor unit so that optimal load balancing of the compressors 11 and 12 is always achieved. | ||||||
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