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| Number | Title | Issue Date |
| 7131451 | Apparatus for controlling and metering fluid flow A device for metering and controlling fluid flow includes a variable orifice and is configured to use a pressure sensor. The device includes a fluid flow conduit having at least one planar inner wall that extends along a portion of the fluid flow conduit length, and... | 11/07/2006 |
| 6109885 | Vacuum System for a transfer system A vacuum system, particularly for vacuum grippers, has a fluid entrainment pump for generating the vacuum which, when the required vacuum is built up, is supplied with a throttled compressed-air flow. For the throttling of the compressed-air flow, a contr... | 08/29/2000 |
| 5875806 | Flow control valve with increased flow range A fluid metering system comprises a source of pressurized fluid, a proportional metering valve and a delta-p regulator, which maintains a constant pressure drop across the proportional metering valve. The delta-p regulator is referenced to the static pres... | 03/02/1999 |
| 5785079 | Fluid distribution valve A valve is disclosed which is adapted to be disposed between a first chamber and a second chamber for the purpose of selectively interconnecting the two chambers or isolating them from one another. The valve comprises a body, a sleeve disposed therein and... | 07/28/1998 |
| 5720313 | Flow rate control system A system for controlling the rate of flow of a liquid in a liquid flow system, especially a system for controlling the rate of flow of treated water in a municipal water treatment and pumping system, the flow control system utilizing a venturi (10) having... | 02/24/1998 |
| 5234021 | Nozzle damper assembly A nozzle damper assembly (10) for installation in a duct (12) operative for measuring and controlling the flow of a gaseous medium through the duct (12). The subject nozzle damper assembly (10) includes enclosure means (24) cooperatively associated with t... | 08/10/1993 |
| 4196849 | Variable volume control assembly An improved variable volume control assembly for conditioned air systems having an improved air flow amplifying measuring means that amplifies the difference between the total pressure and the static pressure and is sensitive at low pressures, an improved... | 04/08/1980 |
| 4004607 | Conduit arrangement with protection against rupture and leakage A conduit arrangement for heavy duty purposes in which a conduit section, such as a length of flexible hose, may be subjected in use to high stresses from pressures attaining several hundred atmospheres, wherein the arrangement provides protection against... | 01/25/1977 |
