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| Number | Title | Issue Date |
| 7360611 | Flow system for a hydraulic choke solids strainer A strainer system having two separate strainers positioned in parallel, where one strainer can be cleaned while still permitting normal flow through the other strainer. The system flow circuit is arranged so that a high pressure backwashing flow can be applied to on... | 04/22/2008 |
| 7288186 | Filtrate immersed activation assembly for disk filters A self cleaning filtration device wherein an activation piston, laterally supported within an activation cylinder is immersed in filtrate within the confines of an immersion chamber. The immersion chamber receives filtrate from a disk filtration stack via orifices a... | 10/30/2007 |
| 7275606 | Solids strainer system for a hydraulic choke The invention contemplates a strainer based upon a four-way, two-position rotary cylindrical plug valve having a hollow plug. The normal entry port for the sealing plug of the plug valve is a circular radial hole passing from the exterior of the plug into the interi... | 10/02/2007 |
| 7178593 | Piggable separation system and method An inline well fluid separator is movable for pigging operations. The separator assembly has a housing with an inlet port and an outlet port. A separation unit is carried within the housing. The separation unit has an operational position in alignment with the ports... | 02/20/2007 |
| 7143782 | Pressure regulator module for controlling a gas A pressure regulator module for controlling a gas is provided, which includes a chamber, at least one gas inlet, and at least one gas outlet. In addition, a proportional valve operating essentially according to the pressure-equalization principle is post-connected t... | 12/05/2006 |
| 7059480 | Continuous blood filtration apparatus This invention provides a continuous blood filtration apparatus capable of filtering a plurality of blood samples continuous by using blood filter units to prepare plasma or serum samples in a short period, which comprises, a conveyor conveying a plurality of blood ... | 06/13/2006 |
| 6241101 | Installation for separating and purifying solids An installation for separating and purifying solids from a suspension and/or for leaching out solid particles has a cylinder and a piston movable therein. A sealing part of the piston is in contact with the interior wall of the cylinder. A filter is posit... | 06/05/2001 |
| 6216880 | Filter device for flowable plastic material A filter device for separating particulate material from a stream of flowable plastics; the device comprises a body member having at least a filter chamber and a flow path extending between inlet and outlet sides. A filter band transversally extends in sa... | 04/17/2001 |
| 5996608 | Diaphragm valve with filter screen and movable wiper element A diaphragm-type control valve for irrigation systems has an outer clam-shell housing that encloses a vertically reciprocable diaphragm assembly. A primary valve seat inside the housing is engaged and disengaged by a seal on the underside of the diaphragm... | 12/07/1999 |
| 5853584 | Self-cleaning filter for filtering of liquids and gases A filter for filtering of a fluid, including a housing having an inlet port for the fluid to be filtered, an outlet port for filtered fluid and an outlet port for filtered fluid and an outlet port for rehect, In a body arranged in the housing to be rotata... | 12/29/1998 |
| 5199458 | Multi-way valve A multi-way valve of the present invention is to locate the rotatable valve core by the openings set in the valve body, the valve ports and the valve core are to be optimally sealed. An L-shaped passage is provided in the valve core, wherein a filter elem... | 04/06/1993 |
| 5087364 | Liquid control assembly A liquid control assembly consisting of: a housing having a top and bottom, a chamber, a drain conduit having an entryway in the chamber and communicating between the chamber and a discharge point, and a delivery conduit having an entryway in the chamber ... | 02/11/1992 |
| 5024763 | Filtering apparatus The filtering apparatus of the invention comprises a filter housing having a water inlet and a water outlet as well as a filter bell dome connected to the housing. A main filter member and thereabove a reversing flow filter member are coaxially arranged o... | 06/18/1991 |
| 4952132 | Reverse-purging plastic injection nozzle A purgeable plastic injection filter nozzle for trapping and eliminating contaminants from molten plastic material in a plastic injection molding apparatus. A nozzle body has an internal main channel therethrough for flow of the molten plastic. A purging ... | 08/28/1990 |
| 4904382 | Filter cartridge security for locking between operating and non-operating positions A filtering system for water treatment incorporating one or more filter assemblies each including a head member having fluid inlet and outlet ports, a replaceable filter cartridge closed at one and the other end being insertable into said head member, sai... | 02/27/1990 |
| 4806217 | Back-flushable filter and pressure-regulator particularly useful therewith A filter device comprises a central tube, a housing enclosing the central tube and defining an internal chamber therewith, and a filter body within the internal chamber. The central tube includes a plug between the inlet and outlet which directs the fluid... | 02/21/1989 |
| 4743365 | Valve filter mechanism This invention comprises a valve filter unit (23, 53) comprising a filter (24, 54) the face (25, 55) of which extends angularly to the flow of a fluid medium toward same, and having perforations (26) formed therein; the filter (24, 54) biased by a spring ... | 05/10/1988 |
| 4734194 | Combined filter and valve mechanism A combined valve and filter mechanism for use in chemical apparatus comprises a valve body having a valve seat connected thereto. A valve stem has a valve at one end thereof for engaging said valve seat and has a cylindrical filter element for telescoping... | 03/29/1988 |
| 4596269 | Differential pressure-actuated valve with clean bias chamber A differential pressure-actuated valve with a piston slidable to open or to close an inlet port. The piston slides in a cylindrical wall, and separates a bias chamber and a flow chamber. The piston is fitted with two oppositely-directed lip seals, one of ... | 06/24/1986 |
| 4488961 | One-way filter unit A one-way filter for use in fluid filtration comprising a housing having inlet and outlet ports, a filter element or elements, free of mobile fibers or filaments, disposed within said housing, and means within said housing for maintaining the filter eleme... | 12/18/1984 |
| 4360037 | Self-cleaning filter assembly for solenoid-actuated valve An improved self-cleaning filter assembly for use in a solenoid-actuated valve of the type having a fluid pressure-operated diaphragm to control opening and closing of the valve. Control fluid under pressure is admitted from an inlet chamber of the valve ... | 11/23/1982 |
| 4265764 | Rotary drum vacuum filter In a rotary drum vacuum filter, the drum sectors are connected by conduits to apertures in a rotary valve member on the drum which is opposed to a fixed valve member. The valve members thus control supply of vacuum (to cause suction filtering) and pressur... | 05/05/1981 |
| 4238877 | Fabrication of screen devices Screen devices for use with an automatic screen changer (10) of an extruder (11) are fabricated from a screen preform (32) including an elongated carrier strip (36) having a plurality of screen elements (33--33) connected thereto. The screen changer (10) ... | 12/16/1980 |
| 4209038 | Fuel metering valve with porous element A fuel metering valve has a housing bore between an inlet and outlet which supportingly receives a movable valve element including an imperforate end plate and an annular, porous metal plate for regulating flow between the inlet and the outlet; the imperf... | 06/24/1980 |
| 4094784 | Apparatus and method for filtering dehydrating and drying material A filter apparatus for treating material comprises a filter cylinder, a hollow valve plate mounted rotatably in the center portion of the filter cylinder and having a filter mesh provided thereon, and a hollow shaft connected to the valve plate to cause t... | 06/13/1978 |
| 4056474 | Straining valves A self-cleaning straining valve having an inlet, an outlet, and a flush port, in which a rotatable plug has a plug flow passage therethrough, the plug flow passage has, in addition to first and second openings at its two ends, a third opening therefrom th... | 11/01/1977 |
