Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7770595 | Flow control valve In one embodiment, a constant-flow valve assembly is provided that comprises a first fluid passageway carrying fluid at a first fluid pressure, a piston chamber, and a second fluid passageway connected to the chamber and carrying fluid at the second fluid pressure. ... | 08/10/2010 |
| 7735514 | Apparatus for regulating flow of a medium in a heating and cooling system The description relates to a device for the regulation of the amount of a medium in a heating or cooling system, comprising a combined valve, which in one and the same valve housing includes one part for pressure difference regulation (2) and one part for flo... | 06/15/2010 |
| 7451781 | Pressure independent control valve The invention provides valves of the type employing a differential pressure regulator and a characterized valve with a mechanism to enhance control of fluid flow independently of system pressure. The valves of the invention are especially suitable for HVAC applicati... | 11/18/2008 |
| 7415921 | Apparatus for preparing a beverage suitable for consumption, such as coffee An apparatus for preparing a beverage provided with a storage tank, a heater and a three-way valve. The three-way valve is provided with in inlet, a first outlet and a second outlet. The three-way valve is provided with a first member which is freely movable between... | 08/26/2008 |
| 7360602 | Barrier orifice valve for gas lift Gas lift valve designs and gas lift systems are described that feature a positive closure mechanism that is highly resistant to significant wear or damage that would result in fluid leakage. A pivotable flapper member is incorporated into a gas lift valve and used a... | 04/22/2008 |
| 7299815 | Micropump check valve device and method of manufacturing the same A micropump check valve device which can be designed thin with good assemblability and applied with urging force. The micropump check valve device includes an upstream side member having a small-bore hole for passing therethrough a fluid, a downstream side member ha... | 11/27/2007 |
| 7258019 | Pressure sensor for high acceleration environments A pressure sensor for sensing a fluid pressure in a high acceleration environment. The sensor has a chamber partially defined by a non-planar membrane, the chamber containing a fluid at a reference pressure, such that the non-planar membrane deflects due to pressure... | 08/21/2007 |
| 7207092 | Slider for slide fastener with automatic stopper This invention relates to a slider for a slide fastener with an automatic stopper comprising front and rear mounting pillars of a slider body and a pawl body open to the rear mounting pillar and having a concave portion for accommodating a shaft portion of a pull wh... | 04/24/2007 |
| 7165575 | Pressure regulator A main valve reduces an unregulated pressure of a high-pressure gas to a regulated pressure by being interlocked with a diaphragm, which receives the regulated pressure within a pressure regulating chamber and is displaced. A subsidiary valve is interlocked with the... | 01/23/2007 |
| 7159611 | Inline flow control device The inline flow control device includes housing with a tubular portion coaxially aligned with the tubular portion of a fitting threaded to the housing. A piston has a bore extending therethrough with the tubular portions extended thereinto in axial spaced relationsh... | 01/09/2007 |
| 7156120 | Inline liquid flow control valve An inline liquid flow control valve includes an intake fitting member with a bottom portion having a bottom portion threaded section and a liquid flow section having apertures. The valve further includes an outlet fitting member with a top portion having a liquid ou... | 01/02/2007 |
| 7140404 | Integral in tank vent construction for pressure based level monitors A method and apparatus are provided for monitoring a liquid level in a closed tank with a differential pressure sensor module disposed in a bottom portion of the tank, by routing a pressure reference tube extending from the pressure sensor module through the interio... | 11/28/2006 |
| 7128086 | Flow control valves In one embodiment, a flow control valve includes a valve body having an inlet, an outlet, a flow passageway coupling the inlet to the outlet, and a cavity with first and second chambers. The valve further includes a hollow piston disposed in the first chamber and a ... | 10/31/2006 |
| 7128087 | Differential pressure valve A regulating insert for insertion in a valve housing or the like in a flowing medium, comprising comprises a pre-setting means for regulation and/or setting of amounts of liquid in installations with flowing media for the limitation of the medium to a pre-set maximu... | 10/31/2006 |
| 7124643 | Pressure sensor with non-planar membrane A pressure sensor for sensing a fluid pressure in harsh environments such as the air pressure in a tire, by using a chamber partially defined by a flexible membrane (20), the chamber containing a fluid at a reference pressure, such that the flexible membrane ... | 10/24/2006 |
| 7111638 | Excess flow shutoff A flexible connector incorporates an excess flow shutoff at its inlet to prevent uncontrolled flow in the event of a failure such as rupture or separation of the connector. A shutoff sleeve moves in a body between an upstream, open position and a downstream, closed ... | 09/26/2006 |
| 7104290 | Joint for a fluid pumping apparatus A joint for a fluid pumping apparatus includes a body having a passage defined in the body and extending through the body. A through hole is longitudinally defined in the body and extends through the body. A container is mounted to a lower end of the body, and the p... | 09/12/2006 |
| 7096093 | Intelligent valve flow linearization A feed-forward flow controller is designed to calculate a target valve position from a target flow. Correction is made for liquid or gas pressure drop across the valve and for the valve flow modulating member geometry. This feed-forward action may also be used to li... | 08/22/2006 |
| 7077290 | Beverage forming and dispensing system A beverage dispensing system includes separate valves for controlling the flow rate of a diluent and a concentrate. Various concentrates of different viscosities can be used and the selected concentrate is identified. The flow rate of the concentrate is determined b... | 07/18/2006 |
| 7074327 | Sample preparation for parallel chromatography Systems and methods are provided for preparing samples for chromatographic separations and then chromatographically separating the prepared samples, preferably in a high-throughput fashion utilizing multiple parallel first (fluid) processing regions in fluid communi... | 07/11/2006 |
| 7025323 | Low power integrated pumping and valving arrays for microfluidic systems Low power integrated pumping and valving arrays which provide a revolutionary approach for performing pumping and valving approach for performing pumping and valving operations in microfabricated fluidic systems for applications such as medical diagnostic microchips... | 04/11/2006 |
| 7013913 | Flow control valve In a flow control valve, a spool is fitted into a cylindrical body including an input port and an output port. A spring is disposed between the spool and a flow rate setting plug at an end of the cylindrical body. A flow bypass communicating with the input port and ... | 03/21/2006 |
| 7000480 | Air flow control device with differential pressure sensing assembly and method An air flow control device, such as an air diffuser (21) with a differential pressure sensing assembly. The diffuser (21) has a housing (29) formed for mounting to a supply air conduit (22) for discharge of supply air (54) into a r... | 02/21/2006 |
| 6966329 | Proportional pilot-operated flow control valve A proportional, pilot-operated flow control valve is disclosed which can include a cage, a hollow compensating spool slidably disposed within the cage, a hollow metering guide member slidably disposed within the compensating spool, a regulating spool slidably dispos... | 11/22/2005 |
| 6932107 | Flow control valves In one embodiment, a flow control valve includes a valve body having an inlet, an outlet, a flow passageway coupling the inlet to the outlet, and a cavity with first and second chambers. The valve further includes a hollow piston disposed in the first chamber and a ... | 08/23/2005 |
| 6895995 | Liquid flow regulator A flow regulator particularly for sub-sea chemical injection at low continuous rates includes a piston moveable in response to differential pressure and controlling via a lever connection an inlet valve. The differential pressure is balanced by a dual rate spring as... | 05/24/2005 |
| 6827100 | Pressure independent control valve Simple APCV, ADPCV and PICV's are provided. The APCV's are referenced to the atmosphere and control the gauge pressure, either upstream or downstream. The ADPCV's are the same as the APCV's, differing in that they are not referenced to the atmosphere. They are inste... | 12/07/2004 |
| 6805156 | Constant flow valve and constant flow mixing method A constant flow valve not allowing a controlled fluid to remain standing in it and not contacting the controlled fluid except at diaphragms, enabling simple adjustment of differential pressure, and good in response, including a valve body, a valve action chamber and... | 10/19/2004 |
| 6729346 | Pneumatic valve A pneumatic valve, includes a housing having first and second ports for entry and exit of an operating gas, a main connection line for linking the ports, and a cross bore intersecting the main connection line. A throttle includes a control element which is received ... | 05/04/2004 |
| 6725880 | Constant flow control valve The present invention relates to a regulating valve for regulating and automatically controlling a fluid for a constant flow, comprising a valve body, a valve stem in the body, a pressure difference transducer, a first clack, and a second clack whose main body is a ... | 04/27/2004 |
| 6688319 | Flow regulating control valve and method for regulating fluid flow According to one aspect of the invention, a fluid regulating control valve includes a housing having an upstream region and a downstream region and having a control orifice formed therein adjacent the downstream region and a piston slidably disposed withi... | 02/10/2004 |
| 6662823 | Auto flow regulator Quantity of fluid can be more precisely controlled without disassembling the valve by an automatic flow control valve, which can be quietly operated and repaired and maintained in simple and easy manner. In the control valve, a valve body has a fluid chan... | 12/16/2003 |
| 6598618 | Flow regulator The invention relates to a variable flow regulator adopted to provide accurate flow rates at low flow and ultra low flow rates. The regulator comprises a wide-range flow regulator for low fluids flow, comprising a housing divided into a first and second c... | 07/29/2003 |
| 6467501 | Fluid flow controller having axial needle valve for adjusting the flow rate A fluid flow regulator in which fluid is passed through an impeller chamber having a pressure differential-operated impeller piston for monitoring changing inlet and outlet fluid pressures to maintain a constant fluid flow rate. A needle valve mounted on ... | 10/22/2002 |
| 6461104 | Flow regulator for a water pump A flow regulator for a water pump, comprising a control valve. The control valve is mounted on an inlet pipe of a water pump and has a chamber, housing a flat-shaped control plate, the upper part of which forms a piston plate, vertically gliding in an upp... | 10/08/2002 |
| 6276491 | Regulator for adjusting the fluid flow in a hydrostatic or aerostatic device A controller for controlling a medium flow fed from a supply to at least one hydrostatic or aerostatic pocket of a bearing, a threaded spindle nut or a guide, having a housing and having pressure chambers which are separated by a control element, movable ... | 08/21/2001 |
| 6273126 | Flow regulator for water pump A flow regulator for a water pump, working in conjunction with a water pump, having a pump, an inlet pipe, an outlet pipe with a water pressure, and a container. The flow regulator comprises: a main body, installed at the inlet pipe and having a passagewa... | 08/14/2001 |
| 6263905 | Automatic regulating valve apparatus An automatic regulating valve apparatus comprises a main valve unit, and a pilot valve unit operatively connected to the main valve unit to control the main valve unit. The main valve unit comprises a main valve casing, a main valve element disposed in th... | 07/24/2001 |
| 6254576 | Pressure-responsive flow regulator and drug delivery devices employing the same A fluid flow regulator of a type having a variable outlet defined by a spacing between an outlet aperture and a flexible diaphragm, and in which the position of the flexible diaphragm varies as a function of a pressure differential between a sensing chamb... | 07/03/2001 |
| 6230734 | Flow-rate controller A flow-rate controller comprises hollow casing 1, main 2 and additional 3 outlet branch pipes, and outlet branch pipe 4. Piston-type slide valve 13 with skirt 14 is located between front 5 and rear 10 guide bushes. The starting fuel component flows throug... | 05/15/2001 |
