Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7993111 | Power steering pump flow control An apparatus for preventing noise from occurring due to cavitation in a power steering pump during low temperature start-up includes the addition of a multi-passage orifice element for adding wetted surface resistance to high viscous fluid flow downstream from a sin... | 08/09/2011 |
| 7350616 | Power steering pump having electronic bypass control A power steering pump comprises a housing that includes a bore, a fluid discharge port that supplies pumped fluid into the bore, and a fluid bypass port for recycling excess fluid to the pumping elements. The pump outlet is at one end of the bore. A flow control val... | 04/01/2008 |
| 7347675 | Vane rotary expansion engine A high-efficiency vane rotary expander is provided, which prevents a loss due to incomplete expansion or overexpansion from occurring because the volume of an operating chamber may vary. This is done by forming a plurality of discharge ports (28, 29, 48, 49, 50 | 03/25/2008 |
| 7249608 | Flow control for power steering The flow control device comprises a supply passage (2) for supplying hydraulic fluid discharged by a pump (1) to a power steering output section (8); a variable throttle section (3) situated at an intermediate position of the supply passa... | 07/31/2007 |
| 7165950 | Two-stage pressure relief valve A two-stage pressure relief valve for use with hydraulic systems is disclosed. The two-stage pressure relief valve has a first stage that relieves increases in hydraulic system pressure over the normal operating pressure and up to a selected threshold pressure level... | 01/23/2007 |
| 7090473 | Multiple stage pump with multiple external control valves A multiple stage pump having valves downstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations and shot to shot fuel variations. ... | 08/15/2006 |
| 7059838 | Control device for positive displacement pumps A control device for a positive displacement pump includes a throttle device and a flow control valve. The flow control valve includes a flow control piston and is configured to regulate an unrequired excess flow of the pump at an increased speed. The throttle devic... | 06/13/2006 |
| 7055376 | Method and a pump apparatus for the generation of an adjustable, substantially constant volume flow of a fluid and a use of this method A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a ... | 06/06/2006 |
| 7048517 | Pump as a pressure source for supercritical fluid chromatography The invention is a device and method in a high-pressure chromatography system, such as a supercritical fluid chromatography (SFC) system, that uses a pump as a pressure source for precision pumping of a compressible fluid. The preferred exemplary embodiment comprise... | 05/23/2006 |
| 7037092 | Roller pump with housing having integrated reduction gear housing A roller pump comprises a pump housing having a cylindrical inner surface, a rotor fixed to a drive shaft placed at the central portion of the pump housing, rollers provided around the rotor and a driver for driving the drive shaft through a reduction gear. The roll... | 05/02/2006 |
| 6948914 | Metering pump with an electric motor The metering pump comprises a synchronous motor which is stepped down via a mechanical gear and the rotation movement of the motor is converted into a stroke movement which drives the membrane pump. To the motor there is allocated an electronic control which may be ... | 09/27/2005 |
| 6945755 | Fluid controlled pumping system and method A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. ... | 09/20/2005 |
| 6926170 | Drink dispensing cart and water packaging and supply system A drink dispensing cart includes a drink dispensing machine that is normally plumbed directly into a municipal water pipe at a fixed location. The cart includes a container of water, preferably a disposable container of water such as a bag-in-box container of water,... | 08/09/2005 |
| 6913446 | Method for improving the efficiency of a variable displacement pump An auxiliary solenoid controlled variable displacement power steering pump, hydraulic systems incorporating same, and method for improving the efficiency of variable displacement power steering pumps. In one embodiment, a rotor is arranged within a pump body, and a ... | 07/05/2005 |
| 6907722 | Gas compressor control device and gas turbine plant control mechanism A gas compressor control device and a gas turbine plant control mechanism are disclosed. A fuel gas pressurized by a gas compressor is supplied to a gas turbine via fuel gas piping. A gas turbine control device adjusts the flow rate of the fuel gas into the gas turb... | 06/21/2005 |
| 6869274 | Method of reducing pressure peaks in a fuel injector A multiple stage pump having valves upstream from each respective pump in a same line thereof. The respective lines then merge into a common line. The multiple stage pump prevents pressure variations. The multiple stage pump includes a first pump in a first stage an... | 03/22/2005 |
| 6810671 | Method for the fuel supply and a fuel supply system for aircraft equipped with at least one aero gas turbine The invention relates to a method for the fuel supply of an aero gas turbine installed in an aircraft and to a fuel supply system. In order to avoid negative effects by out-gassed air in the fuel lines, the invention provides for an increased flow rate of the fuel i... | 11/02/2004 |
| 6796778 | Fuel injection pump having throttled fuel path for fuel lubrication In a fuel path through which fuel is supplied to a pump-cam chamber accommodating a drive shaft and a cam for lubrication, an annular throttle fuel path is formed between an inside wall of a cylindrical body and an outside wall of a sphere, when the sphere is in con... | 09/28/2004 |
| 6672826 | Compressor surge control apparatus Apparatus for compressing fluid flow and for controlling said flow, comprising in combination, a casing having an interior, an impeller rotating within said interior between a fluid supply zone and pressurized fluid discharge zone, fluid flow control memb... | 01/06/2004 |
| 6663349 | System and method for controlling pump cavitation and blockage A pump control system and a controller therefor are disclosed which operate a motorized pump in a controlled fashion. The controller provides a control signal to a motor drive according to a setpoint or according to a cavitation signal from a cavitation d... | 12/16/2003 |
| 6641372 | Dual discharge hydraulic pump and system therefor A hydraulic pump includes a housing, a primary discharge outlet, an auxiliary discharge outlet, and a flow control valve for controlling fluid flow from the primary and auxiliary discharge outlets. A first fluid passageway within the housing passes fluid ... | 11/04/2003 |
| 6604913 | Vane pump In a vane pump, a bottom surface of a suction side low pressure passage is set to be below a bottom surface of a return passage of a flow control valve in a cross portion between the return passage and the low pressure passage.... | 08/12/2003 |
| 6585493 | Hygienic self-priming centrifugal pump A hygienic, self-priming centrifugal pump (1) with a pump housing (4) provided with an inlet opening (2) and a pressure connecting piece (3), where an impeller wheel (7) can rotate inside said pump housing. The inlet opening (2) is connected with a liquid... | 07/01/2003 |
| 6478549 | Hydraulic pump with speed dependent recirculation valve This invention offers advantages and alternatives over the prior art by providing a dual port hydraulic fixed displacement pump which exhibits improved efficiency by limiting the volume of discharged fluid which is subjected to the line pressure of a hydr... | 11/12/2002 |
| 6406268 | Control of a compressor unit A controller for a compressor determines a characteristic variable for an overall flow to be supplied, and generates on the basis of this characteristic variable, by means of static functions, a first setpoint value for a row of inlet guide vanes or an in... | 06/18/2002 |
| 6386835 | Misting pump and housing system A misting pump system (20) includes a housing (22), an electronic section (62), and a water transfer section (80). The housing (22) includes a base (48), a front panel (24), a rear panel (26), a cover (50), and a barrier wall (52). The barrier wall (52) i... | 05/14/2002 |
| 6293766 | Process for operating a compressor with a downstream user, and unit operating according to this process A compressor, especially for compressing the fuel gas for a gas turbine, is controlled by a throttling member (9) arranged on the intake side of the compressor as a function of the gas consumption of the user (7) such that the flow cross section is reduce... | 09/25/2001 |
| 6276154 | Two step metering device A two-step metering device for controlling the flow of an operating fluid to a variable capacity compressor is provided. The metering device includes a valve that defines a fluid flow path having a large orifice configured to allow a flow rate correspondi... | 08/21/2001 |
| 6273686 | Apparatus and method for controlling a rated system pressure The rated system pressure in a pressure control system is adjusted through a pressure relief valve (2). In addition to the pressure relief valve (2), the system includes a check valve (4), a pressure sensor (3), a position switch (10), a first pressure ad... | 08/14/2001 |
| 6254358 | Positive-displacement pump A positive-displacement pump for conveying a pressure medium from a container to a consumer, in particular a power steering system includes, a pump package (2); the pump package includes a rotor (3), a cam ring (4) and several operating slides (5) has bee... | 07/03/2001 |
| 6241485 | Wastewater flow control system A sewage pumping apparatus is provided for delivering sewage collected by gravity in a wet well to a force main. The sewage pumping apparatus comprises a motor controlled pump in fluid communication with the wet well for supplying sewage to the force main... | 06/05/2001 |
| 6213730 | Flow control apparatus for a hydraulic pump A variable flow control apparatus for a pump, including a discharge passage communicating with the pump, a variable flow control valve operative to vary a flow of fluid passing through the discharge passage and disposed within the discharge passage, and a... | 04/10/2001 |
| 6171073 | Fluid vacuum safety device for fluid transfer and circulation systems A safety device for use in a fluid transfer and/or circulation system of the type which uses a pump to draw water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The safety device conn... | 01/09/2001 |
| 6139285 | Hydraulic pump for power steering system A hydraulic pump including a pressure chamber, a drain passage communicable with the pressure chamber, a delivery port, a discharge path fluidly connecting the pressure chamber with the delivery port, and an orifice disposed in the discharge path. A first... | 10/31/2000 |
| 6123510 | Method for controlling fluid flow through a compressed fluid system A method for controlling the supply flow through a compressed fluid system having a fluid compressor with a inlet valve, and a host system in signal receiving relation with a supply flow sensor and in signal transmitting relation with a compressor control... | 09/26/2000 |
| 6099264 | Pump controller In accordance with the present invention, there is provided an in-line fluid pump controller for activating and de-activating a fluid pump which is configured to pump fluid through a fluid line. The fluid in the fluid line is characterized by a flow rate ... | 08/08/2000 |
| 6033190 | Flat faced bearing housing engaging flat faced pump rotor housing In a vane cell pump for pumping a pressure fluid from a container to a consumer, all the essential components and functional characteristics are accommodated in a bearing housing (10). The components include a suction connection (13) for connecting to the... | 03/07/2000 |
| 6012907 | Flow-regulating arrangement for a hydraulic transporting device A flow-regulating arrangement for a hydraulic transport device such as a vane-cell pump includes partial-transport flow throttles which operate independently of one another and which are arranged in parallel to deliver output of the hydraulic transporting... | 01/11/2000 |
| 6000914 | Rotary vane cell pump having a frustrum orifice A vane cell pump with a flow regulating valve (13), upon whose regulating piston (17) the outlet pressure and a spring force act on one side. Between a pressure chamber (1) and an outlet channel (19), an orifice (14) is provided in the control plate (7), ... | 12/14/1999 |
| 5947700 | Fluid vacuum safety device for fluid transfer systems in swimming pools A safety device for use in a fluid transfer system for a swimming pool or similiar application, having a pump which draws water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The devi... | 09/07/1999 |
