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| Number | Title | Issue Date |
| 7854794 | Rotary valve element for twin bed alternative treatment systems In a disclosed embodiment, a chemical process has a pair of beds, with each of said beds having at least one connection to receive a source of gas, and for delivering gas downstream. Each of the beds includes chemical treatment elements. The system includes a connec... | 12/21/2010 |
| 7367777 | Fan blade air filter A filter assembly for mounting on a conventional or ceiling fan blade includes a fan blade mount, a filter mount, and an air filter. The fan blade mount has a blade mount slot formed therein that is dimensioned to slidably engage a ceiling fan blade. The filter moun... | 05/06/2008 |
| 7335333 | Method of altering a fluid-borne contaminant An improved method of altering a fluid-borne contaminant includes the steps of: providing a positive-displacement pump (21) having an inlet (22) and an outlet (23); connecting the pump inlet to a source (24) of contaminated fluid; operati... | 02/26/2008 |
| RE40006 | Flow regulated pressure swing adsorption system Pressure swing adsorption (PSA) separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds. The invention provides rotary multiport distributor valves to control the timing sequence of the PSA cycle steps between the beds, with flow ... | 01/22/2008 |
| 7294180 | Gas generator assembly A gas generator assembly, which is especially suited to both transportable and on-board oxygen generators, with at least one adsorbent and a buffer tank to store product gas separated from a feed gas mixture. In order to make the assembly squat and compact, the buff... | 11/13/2007 |
| 7276107 | Indexing rotary dual valve for pressure swing adsorption systems The present invention relates to a PSA system using an indexing rotary dual valve regulating a stepping mode of operation that controls a variable bed inlet feed flow rate, controllable pressure between feed lines in different beds of the PSA system and varied outpu... | 10/02/2007 |
| 7276095 | Fuel processor module for hydrogen production for a fuel cell engine using pressure swing adsorption A stand-alone fuel processor (10) for producing hydrogen from a hydrocarbon fuel for a fuel cell engine in a vehicle. The fuel processor (10) includes a primary reactor (14) that dissociates hydrogen and other by-products from the hydrocarbon fu... | 10/02/2007 |
| 7250073 | Life support oxygen concentrator Gas separation by pressure swing adsorption (PSA) and vacuum pressure swing adsorption (VPSA), to obtain a purified product gas of the less strongly adsorbed fraction of the feed gas mixture, is performed with an apparatus having a plurality of adsorbers. The adsorb... | 07/31/2007 |
| 7179326 | Oxygen concentration apparatus An oxygen concentrating apparatus 10 for generating oxygen enriched gas by adsorbing and separating nitrogen gas from air, comprises; an oxygen concentrator 40 having an adsorption cylinder filled with adsorbent for adsorbing nitrogen gas, also having ... | 02/20/2007 |
| 7121276 | Personal oxygen concentrator An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen separator for ambulatory use. ... | 10/17/2006 |
| 7114932 | Valve-free oxygen concentrator featuring reversible compressors A pivoting vane rotary compressor includes a housing having a generally pear-shaped chamber. A rotor mounted within the chamber defines a main and constricted chamber regions. Reversible intake and exhaust ports alternately introduce air into and exhaust air from th... | 10/03/2006 |
| 7011693 | Control of a hydrogen purifying pressure swing adsorption unit in fuel processor module for hydrogen generation A PSA unit for purifying hydrogen in a fuel processor system. The PSA unit employs rotary valves that cycle the pressurization of vessels, including an adsorbent, between a high pressure state and a low pressure state. The purified hydrogen is released from the vess... | 03/14/2006 |
| 6997976 | Filtering devices The invention provides a low-resistance gas adsorption filter provided with an activated carbon bed of bulk density less than 0.6 gram/cubic centimeter, the activated carbon bed being free of chromium 6+ salt, the filter being characterized by a gas holding capacity... | 02/14/2006 |
| 6936091 | System and method for treating fluid using a multi-port valve assembly A valve assembly for use in a gas purification system having a plurality of vessels each having a first port opening and a second port opening. The gas purification system includes a first valve element having a first aperture to selectively connect a first port ope... | 08/30/2005 |
| 6918953 | Modular pressure swing adsorption process and apparatus A pressure swing adsorption (PSA) system including a first group of PSA modules having a plurality of first PSA modules, and a second group of PSA modules having a plurality of second PSA modules. The system includes a feed gas manifold, a product manifold, and a wa... | 07/19/2005 |
| 6749405 | Reversible pivoting vane rotary compressor for a valve-free oxygen concentrator A reversible pivoting vane rotary compressor includes a housing having a generally cylindrical chamber defined by an inner wall. A rotor is mounted eccentrically within the chamber to define about the rotor a generally crescent shaped compression chamber, which narr... | 06/15/2004 |
| RE38493 | Flow regulated pressure swing adsorption system Pressure swing adsorption (PSA) separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds. The invention provides rotary multiport distributor valves to control the timing sequence of the PSA cycle steps between the beds, with flow ... | 04/13/2004 |
| 6712087 | Rotary valve assembly for pressure swing adsorption system The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving action for se... | 03/30/2004 |
| 6471744 | Vacuum-pressure swing absorption fractionator and method of using the same The present invention involves a vacuum-pressure swing adsorption process for the separation of components of a fluid mixture. The process includes (a) transferring a fluid mixture through an adsorbent bed at an elevated pressure Ph so as to pr... | 10/29/2002 |
| 6457485 | Rotary valve assembly for pressure swing absorption system The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving ac... | 10/01/2002 |
| 6372026 | Apparatus for producing oxygen enhanced gas from air A fractionator produces an oxygen enhanced gas for use in oxygen inhalation therapy. The fractionator includes an air source for supplying air, and a plurality of columns for containing an adsorbent material for adsorbing nitrogen gas. Each of the columns... | 04/16/2002 |
| 6311719 | Rotary valve assembly for pressure swing adsorption system The present invention relates to a rotary valve assembly for a pressure swing adsorption system. The rotary valve assembly includes a first valve member and a second valve member relatively rotatable about a common center of rotation to provide valving ac... | 11/06/2001 |
| 6143056 | Rotary valve for two bed vacuum pressure swing absorption system A dual-chambered, four-ported rotary valve with a rotatable drum having peripheral openings is used to selectively connect vacuum and/or air sources and a vent to absorption chambers in a two-bed VPSA (vacuum presssure swing absorption) system to replace ... | 11/07/2000 |
| 6063161 | Flow regulated pressure swing adsorption system Pressure swing adsorption (PSA) separation of a gas mixture is performed in an apparatus with a plurality of adsorbent beds. The invention provides rotary multiport distributor valves to control the timing sequence of the PSA cycle steps between the beds,... | 05/16/2000 |
| 5980615 | Compact air dryer A compact desiccant-operated air dryer includes air directing housings, each housing including a separate desiccant bed. Each housing includes an associated desiccant bed to provide dehumidification to process air flow during a dehumidification phase of t... | 11/09/1999 |
| 5891217 | Process and apparatus for gas separation A rotary valve system which includes of a pair of valve assemblies each of which has valve parts with flat faces which, when pressed together and rotated, provide valving action between various ports incorporated in one valve part of each assembly. The fi... | 04/06/1999 |
| 5827358 | Rapid cycle pressure swing adsorption oxygen concentration method and apparatus A rapid pressure swing adsorption oxygen concentrator is provided having a plurality of at least three sieve beds cycled in sequence such that each is pressurized during one segment of a cycle and depressurized during a plurality of segments of a cycle wh... | 10/27/1998 |
| 5820656 | Process and apparatus for gas separation A rotary valve system which includes of a pair of valve assemblies each of which has valve parts with flat faces which, when pressed together and rotated, provide valving action between various ports incorporated in one valve part of each assembly. The fi... | 10/13/1998 |
| 5814131 | Process and apparatus for gas separation A rotary valve assembly which includes a pair of valve parts with flat faces which, when pressed together and rotated, provide valving action between various ports incorporated in one of the valve parts. The first valve part contains two circular arrays o... | 09/29/1998 |
| 5814130 | Process and apparatus for gas separation A rotary valve assembly which includes of a pair of valve parts with flat faces which, when pressed together and rotated, provide valving action between various ports incorporated in one of the valve parts. The first valve part contains two circular array... | 09/29/1998 |
| 5807423 | Process and apparatus for gas separation A rotary valve assembly which includes of a pair of valve parts with flat faces which, when pressed together and rotated, provide valving action between various ports incorporated in one of the valve parts. The first valve part contains two circular array... | 09/15/1998 |
| 5779771 | Rotating flow distributor assembly for use in continuously distributing decontamination and regeneration fluid flow The rotating flow distributor assembly comprises a connected pair of cylindrical housings, with an inlet port and an outlet port, that receive and discharge the flow of fluid undergoing decontamination. The fluid passes into flow distribution chambers loc... | 07/14/1998 |
| 5681376 | Rotating flow distributor assembly for use in continuously distributing decontamination and regeneration fluid flow The rotating flow distributor assembly comprises a cylindrical housing, with an inlet port and an outlet port, that receive and discharge the flow of fluid undergoing decontamination. The fluid passes into two flow distribution chambers located at either ... | 10/28/1997 |
| 5632804 | Process and apparatus for separating constituents of a gas mixture by adsorption A process for separating components of a gas by adsorption in an enclosure (1) divided into equal tight separated compartments (27) each provided with an adsorbent material (7, 8) chosen in function of the gas to be treated and each provided for temporari... | 05/27/1997 |
| 5593478 | Fluid fractionator A rotary valve at the inlets of a plurality of columns cyclically (1) selects first columns on a cyclic basis to receive compressed air, adsorb nitrogen and other components in the compressed air and pass oxygen and argon to a user (e.g. patient), second ... | 01/14/1997 |
| 5593480 | Apparatus for the oxygen enrichment of air For the oxygen enrichment of air two containers (11,11') working according to a pressure change process are provided. Each container (11, 11') is partly filled with a packed zeolite bed (13, 13'). Compressed air is fed to one container via a common closur... | 01/14/1997 |
| 5584322 | Rotary slide valve A rotary slide valve (10) controls compressed air, nitrogen and oxygen streams independently from each other. The rotary slide valve (10) consists of a housing (15) with pairs of diametrically opposed radial bores and a valve body (11) with recesses (35, ... | 12/17/1996 |
| 5578111 | Process and a device for continuous chromatography A process is described for the separation of a mixture of substances by sorption of the mixture's components on two different sorption agents, which are individually and independently adjustable in their sorption properties, and is performed in a manner b... | 11/26/1996 |
| 5370721 | Ceiling fan filter A ceiling fan filter for filtering the air in a room having a ceiling fan is made from at least one layer of resilient polymeric fiber filter material. Each layer has a length, a width, an upper surface, a lower surface and two side edges which extend alo... | 12/06/1994 |
| 5366541 | Fluid fractionator Improved apparatus for fractionating fluid mixtures by pressure swing molecular adsorption employing a rotary distributor valve and an array of adsorber columns. The columns are, in one embodiment, contained within a product holding tank or, in another em... | 11/22/1994 |
