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| Number | Title | Issue Date |
| 7967901 | Lubricating liquid separator A lubricating liquid separator which can damp compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister having a sound absorbing performance is disposed on ... | 06/28/2011 |
| 7879142 | Cyclone dust collector and vacuum cleaner A cyclone dust collector includes a cyclone body including a first cyclone chamber to centrifugally separate dust from drawn-in air for a first time, a plurality of second cyclone chambers to centrifugally separate dust from the drawn-in air for a second time, and a... | 02/01/2011 |
| 7293629 | Exhaust apparatus for small-sized engine An exhaust apparatus has an exhaust pipe that receives exhaust gas from an engine and a muffler attached to the exhaust pipe. The muffler has an exhaust portion that discharges exhaust gas received by the exhaust pipe. A tubular member is attached to the exhaust por... | 11/13/2007 |
| 7247180 | Silencer for dust collection system An auxiliary dust collection system can be interposed between a sander or other dust producing tool and a vacuum source, e.g., shop vacuum. A cyclonic separator is connected by a flexible hose to the tool and by another hose to the vacuum source. The cone of the sep... | 07/24/2007 |
| 7228935 | Attachment pin for an exhaust-gas muffler The invention relates to an attachment pin (1) for fixing an exhaust-gas muffler (2) in an apparatus part (4) of a portable handheld work apparatus (5) driven by an internal combustion engine. The exhaust-gas muffler (2) includes e... | 06/12/2007 |
| 7226656 | Thermoformable acoustic sheet A thermoformable acoustic sheet formed by a compressed fibrous web including high melt and adhesive thermoplastic fibres in which the adhesive fibres are at least partially melted so that in the compressed web the adhesive fibres at least partially coat the high mel... | 06/05/2007 |
| 7156903 | Sound enclosure for portable oxygen concentrators A portable pressure swing adsorption apparatus and conservation device for medical use, and a sound enclosure for the apparatus having two isolating sections to enclose the apparatus, the enclosure having an inlet in one of the sections for allowing ambient air into... | 01/02/2007 |
| 7141101 | Filter assembly with noise attenuation A filter assembly configured for acoustic dampening for use with compressor assemblies such as oxygen concentrators including a compartmented housing member having an inlet opening, an outlet opening, a filter member, and a plurality of noise attenuating members pos... | 11/28/2006 |
| 7051453 | Particulate trap cleaning system A system for cleaning a particulate trap comprises locating the trap in a chamber and forcing cleaning air through the trap. The air and removed particulates is extracted from the trap towards a filter. The expelled air essentially without the removed particulates f... | 05/30/2006 |
| 7052532 | High temperature nanofilter, system and method A filter, system and method is provided for filtering nanoparticles in a hot gas, namely particles about 200° C. and further particularly >about 450° C. including diesel exhaust. The filter includes filter media material composed of fibro... | 05/30/2006 |
| 6932188 | Silencer for vacuum cleaner A silencer for a vacuum cleaner is provided and includes at least one hermetic expansion chamber mounted in an exhaust channel of the vacuum cleaner and allowing an exhaust airflow from the vacuum cleaner to pass through. The expansion chamber at its two sides has a... | 08/23/2005 |
| 6780534 | Filter assembly for intake air of fuel cell A filter assembly for removing particulate contaminants and chemical contaminants from an incoming dirty air stream for a fuel cell. The filter assembly also includes a noise suppression element that reduces noise emanating from any equipment, such as a compressor. ... | 08/24/2004 |
| 6702880 | Inlet silencer/filter for an oxygen concentrator An improved inlet silencer/filter for an oxygen concentrator includes a HEPA filter and an adjoining chamber for receiving air flow from the HEPA filter. The chamber is surrounded on one face by the HEPA filter, and by sound absorbing padding on at least ... | 03/09/2004 |
| 6680028 | Portable air purifier apparatus and system A portable air purifier system and apparatus which includes a multi-element filter pack that is replaceable as a single unit, thus facilitating health safety of maintenance personnel. By serially disposing filter elements in order of descending sizes of p... | 01/20/2004 |
| 6626984 | High volume dust and fume collector An apparatus for removing dust and fumes from a flow of air, particularly a flow of air exhausted from an industrial work area. There is a large, cylindrical filter element mounted within a cylindrical collector barrel so as to define an annular flow spac... | 09/30/2003 |
| 6503303 | Enclosure for an air aspirating machine An enclosure for an air aspirating machine, such as a compressor 11 for a fuel cell drive 13, which represents a closed volume, so that said volume can be used acoustically for the air that is being drawn in. An air intake 17 is extended into the enclosur... | 01/07/2003 |
| 6497753 | Electrostatic air cleaner A device for cleaning gases includes a housing and a plurality of electrostatic filter units. Each of the filter units have a tube-shaped covering, and the housing has an intake opening at one end and an outlet opening at the other end for gas flow. The f... | 12/24/2002 |
| 6451097 | Air treatment plant provided with noise attenuation means An air treatment plant includes a waste gas vent connected to structure (50) for attenuating the noise conducted by this waste gas. The noise attenuation structure (50) is a substantially closed and at least partially buried enclosure (52). The invention ... | 09/17/2002 |
| 6361590 | Low noise air cleaner A portable air cleaner including a housing defining an air inlet, an air outlet, and an air flow path therebetween, a centrifugal blower retained within the air flow path and operable to draw air through the inlet and a filter retained within the housing ... | 03/26/2002 |
| 6296692 | Air purifier An air cleaning apparatus provides a housing with a column shape and an air cleaning unit within a portion of the housing, the cleaning unit having a complementary shape. The air inlet and outlet nozzles to the housing are provided at a top and bottom fac... | 10/02/2001 |
| 5961702 | Air replenishment unit An air replenishment unit more particularly for suspension under ceilings of clean rooms, including a housing whose wall is provided with a fan on the intake side, an outlet opening of the housing being functionally connected with an air filter arrangemen... | 10/05/1999 |
| 5641343 | Room air cleaner A portable air cleaner designed to remove fine particles and unwanted gases from a room to provide for a healthier and cleaner environment. The portable air cleaner includes a high air volume circulating design and operates quietly and efficiently. The po... | 06/24/1997 |
| 5516349 | Modular dust collector Disclosed is a dust collector that is essentially modular in structure, thereby making it easy to transport, position and assemble by the user himself or herself. This dust collector includes one or more filter modules, a fan module operatively connectabl... | 05/14/1996 |
| 5297990 | Filter-ventilator-arrangement A filter-ventilator-arrangement for employment with clean chambers with at least one ventilator of which the pressure side is located toward an air flow chamber which is limited by boundary walls including a flow chamber formed by at least one annular cha... | 03/29/1994 |
| 5290330 | HEPA filtration system A device for filtering air comprising a filter housing having an air inlet for directing flow of air drawn into the housing from atmosphere and an air outlet for directing flow of air exhausted from the housing to atmosphere, the air drawn into the housin... | 03/01/1994 |
| 5226939 | Surgical smoke evacuation system A surgical air vacuum apparatus includes an air pump disposed in a primary air channel for moving air between an inlet port and an outlet port of the vacuum. The air pump has properties for generating heat while moving the air, and the moving air has char... | 07/13/1993 |
| 5097924 | Muffler for a compressed air driven motor A sound absorbing muffler for a compressed air driven motor has first and second mutually confronting end walls connected by four side walls. A pad of sound absorbing material constructed from SAE No. F-7 polyester felt is contained in the muffler housing... | 03/24/1992 |
| 5022899 | Sonic debubbler for liquids A fluid debubbler 10 for removing bubbles from fluids such as blood. The debubbler utilizes an ultrasonic transducer 22 to produce low power anisotropic sound waves at about the resonant frequencies of the bubbles to be removed. The sound waves impart a f... | 06/11/1991 |
| 4900342 | Blower-filter assembly A quick connect, disconnect connection between elements of a blower-filter system which makes use of adjacent compatible VELCRO strips on each element to be connected and a VELCRO tape which joins the two parts together by use of the VELCRO strips.... | 02/13/1990 |
| 4810269 | Point one micron filtering system A portable and mobile multi-stage filtering system is disclosed capable of filtering particulate of the size of one micron. An external canister filter capable of filtering down to at least 0.5 microns is connected to and located external to the cabinet o... | 03/07/1989 |
| 4789388 | Oxygen enriching apparatus An apparatus for producing oxygen enriched air from the atmospheric air, including an oxygen enriching system employing a fan for inducing a flow of atmospheric air through an oxygen enriching unit and a pump for deriving the oxygen enriched air from the ... | 12/06/1988 |
| 4762540 | Noise suppression and particle separation apparatus for high pressure gaseous fluid flows Noise suppression and particle separation apparatus for flows of high pressure, high velocity, particle-laden, gaseous fluid, such as geothermal steam, comprises a gaseous fluid conduit that has axially installed around its discharge end a larger diameter... | 08/09/1988 |
| 4747857 | U-loop air handling apparatus A U-loop air handling apparatus adapted to receive air from a surrounding environment for conditioning and channeling thereof to return ducts. The conditioning includes cooling and filtration thereof such as to be specifically usable in high technology ar... | 05/31/1988 |
| 4737173 | Room air treatment system A room air treatment system in which air is drawn through a large particle prefilter, a first carbon filter, a second dual honeycomb matrix carbon filter in which the honeycomb cells in adjacent matrices are offset relative to one another, a blower mounte... | 04/12/1988 |
| 4666477 | Adjustable damper for clean room systems An adjustable damper or air flow control valve for clean room systems, laminar flow benches, filter diffusers, fan/filter units and the like includes a fixed plate defining a plurality of rows of apertures. The plate is fabricated from an aluminum-clad fi... | 05/19/1987 |
| 4560395 | Compact blower and filter assemblies for use in clean air environments Compact centrifugal fan and filter assemblies for use in providing laminar flow clean air to a work space environment such as those within clean rooms and clean air work stations or cabinets wherein the fan and filter element are mounted in a close physic... | 12/24/1985 |
| 4526592 | Air circulator and air filtration device An air circulator and air filtration device for a room or other enclosed space supported in the corner thereof intermediate the floor and ceiling and including an upwardly opening top air inlet and a downwardly opening bottom air inlet with each inlet inc... | 07/02/1985 |
| 4458680 | Protective supplied breathing air garment A breathing air garment for isolating a wearer from hostile environments containing toxins or irritants includes a suit and a separate head protective enclosure or hood engaging a suit collar in sealing attachment. The hood and suit collar are cylindrical... | 07/10/1984 |
| 4384020 | Honeycomb noise attenuating structures Honeycomb noise attenuation sandwich panels and method of construction having a cellular core positioned between and bonded to two facing sheets. One facing sheet is perforated and the other imperforate. A thin sheet of porous fibrous felt or fabric is bo... | 05/17/1983 |
| 4350506 | Washing device A washing device comprises an upper chamber containing a washing liquid and communicating with an enamel-spraying device and a lower under-pressure chamber. A nozzle is installed between those two chambers which has an inlet to receive the washing liquid ... | 09/21/1982 |
