Impeller Upstream Of Separating Media Patents (Class 55/473)
  • Patent number: 6302947
    Abstract: A apparatus for controlling air-borne particles at a manicure work station for controlling fumes and air-borne particles associated with manicures. The apparatus for controlling air-borne particles at a manicure work station includes a platform. The platform has a top surface. The platform has a lumen therein. The platform has a plurality of apertures extending into the lumen from the top surface. A housing has a top wall, a front wall, a back wall, a first side wall and a second side wall. The housing is integrally coupled to the surface of the platform. The apertures are positioned in the housing, and the top wall is substantially transparent. A first opening is in the housing. The first in opening is in the front wall. A second opening is also in the housing. The second opening located is in the back wall. A blower means circulates air. The blower means has an intake duct and an exit duct. The blower means is mounted to the top surface of the platform.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: October 16, 2001
    Inventor: Warren A. Rees, Jr.
  • Patent number: 6302783
    Abstract: Air-conditioning device includes a holder which is to be arranged against the wall of the room and is provided with a top wall, front wall, side walls, base and rear wall. An opening for the supply of fresh air form the environment is arranged in the rear wall. An air-inlet opening for the air from the room is arranged in the base, while an air-outlet opening is arranged on the top side. The supply of fresh air and inlet opening emerge in a first chamber in which a fan is arranged. A HEPA filter is connected to this chamber. A control device is provided in order to control the ratio between the fresh air flowing in and the air from the room in question.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: October 16, 2001
    Inventor: Norbert Peter Vroege
  • Patent number: 6290740
    Abstract: A workbench suited for welding, grinding, and polishing operations features a multi-panel table top. The panels each have a high number of perforations to allow a high rate of air flow at a relatively low noise level. An optional backwall or a booth can be mounted atop the tabletop. Each also has perforations to collect dust from the air flow.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: September 18, 2001
    Assignee: Sportsman, Inc.
    Inventor: Richard F. Schaefer
  • Patent number: 6280491
    Abstract: An apparatus for separating and filtering pollutants from a fluid flow by using inertia to separate a proportion of the pollutants from the fluid flow passing through a constricted passage between a pair of filter elements to an outlet between the filter elements. The constricted passage causes the major portion of the fluid flow to be diverted to pass through the filter elements to the outlet in a direction whereby the filtered fluid flow exits into the outlet of the constricted passage. The apparatus also includes a device to periodically clean the filter elements whilst in position in the apparatus.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: August 28, 2001
    Assignee: Ozone Manufacturing Pty Ltd.
    Inventor: Simon Forbes Oke
  • Patent number: 6277176
    Abstract: There is provided an air delivery device and method of moving and filtering air. The air delivery device comprises a housing having an air inlet and an air outlet. Between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving elements, the rotating air moving elements intersects the flow of air between the air inlet and the air outlet and establishes a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprises at lest one filter element, having at least one upstream filter face and at least one downstream filter face, defining at least one primary flow channel, and rotating along the same axis of rotation as the air moving elements and preferably forming the air moving elements at least in part.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: August 21, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Yuan-Ming Tang, Ricardo Lira, Michael Harms
  • Patent number: 6267794
    Abstract: An aspirator for oil mists, particularly for machine tools and the like, the particularity of which is the fact that it comprises a substantially cylindrical external enclosure, inside which at least one impeller driven by an electric motor is accommodated, and a filtering module, which allows to filter the air aspirated by the impeller through the filtering module, the enclosure being supported so that it can oscillate by a supporting frame in order to pass from a working position in which its axis is vertical with respect to a resting plane of the supporting frame to a working position in which its axis is horizontal with respect to the supporting plane.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: July 31, 2001
    Assignee: Losma S.r.l.
    Inventor: Giancarlo Losma
  • Patent number: 6261332
    Abstract: An air filtration system which is adapted to filter contaminants and is intended for use with a bed having a head area, comprising, one or more air intake ports adapted to be located under the bed; one or more fans adapted to be located under the bed and downstream of the intake port; a first air filter downstream of the intake port; and one or more conduits, downstream of the air intake port, at least one of which is capable of transporting air filtered by the first filter towards one or more air outlet ports located proximate the head area.
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: July 17, 2001
    Inventor: Bernard J. Richard
  • Patent number: 6251155
    Abstract: To supply clean air throughout entire racks even if the height of the racks in an automatic warehouse is increased. A blower motor 18 is provided at the bottom of racks 10 and 11 to suck air in a loading space 12 and supply it to a clean air path 20. In addition, air flows from a ceiling clean fan unit 8 to the racks 10 and 11 via an air intake port 24, and the air flowing from the racks 10 and 11 to the loading space 12 is sucked by means of a blower motor 18.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: June 26, 2001
    Assignee: Murata Kikai Kabushiki Kaisha
    Inventor: Masazumi Fukushima
  • Patent number: 6210456
    Abstract: The exhaust system for a drive-thru bay has an elongated suction tube member at one side of a driveway that is parallel to and elevated from the driveway. Wing members are attached to the elongated suction tube to form a channel member with an open side that faces toward the driveway. Apertures through the base of the channel connect the channel to the suction tube. A blower inlet pipe connects the suction tube to a blower. A discharge pipe carries gas away from the blower and discharges the gas into the atmosphere. Filters and converters can be provided in the inlet pipe or the discharge pipe. A pipe with inlet apertures rings a service opening and is connected to the blower inlet.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: April 3, 2001
    Inventors: Brian J. Bailie, J. C. Cotner
  • Patent number: 6206955
    Abstract: An improved vacuum cleaner apparatus having at least three stages of dust collection with a path partially submerged in water and provided with a separation labyrinth. The apparatus is subdivided into two parts, an upper one which includes the support body of a suction motor unit, and a lower one which includes the labyrinth. The lower one provides an intermediate washable filter. The support body is housed in an opening coated by an acoustic insulating material.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: March 27, 2001
    Assignee: W.S. S.p.A.
    Inventor: Silvano Pietrobon
  • Patent number: 6200215
    Abstract: A fan module for clean room applications, comprising outer, vertical restriction walls (5) with a lower edge part (6) having a planar lower surface (7) as well as an element (9) protruding from the outer edge of the planar lower surface for cooperation with a filter docking module (2) provided in a roof filter frame (4) having a substantially planar upper surface (8) with an extension corresponding to said planar lower surface, whereby said protruding element (9) is designed to overlap part of said filter docking module (2).
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: March 13, 2001
    Assignee: ABB Fläkt AB
    Inventors: Bertil Larsson, Peter Jansson
  • Patent number: 6174342
    Abstract: A fan filter unit for clean rooms has baffle structures sized and placed to limit the paths of entry of air flow from the unit motorized fan to the outlet ports, the baffle structures extending for a vertical height sufficient to avoid reversal of air flow within the enclosure for lower energy requirements in the unit while controlling noise levels and keeping BTU output low.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: January 16, 2001
    Assignee: HEPA Corporation
    Inventor: Peter Jeanseau
  • Patent number: 6156090
    Abstract: An air cleaner includes a housing having an upper wall and side walls, an air filter mounted with respect to the housing, a fan including a vane-wheel having a plurality of vanes, a supporting plate extending substantially between at least two side walls for supporting the fan. An air flow directional member directs an air flow output from the fan. The vane is formed to have a winglike cross-section, and the vane-wheel includes not more than four vanes. The vane-wheel has a base plate and a shroud. Each of the base plate and the shroud is formed to have a reinforcement portion on its circumference. A U-shaped balance weight is attached to a flattened portion formed on the curled portion. The air cleaner of the present invention can reduce noise and vibration and improve efficiency of the fan.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: December 5, 2000
    Assignees: Hitachi, Ltd., Hitachi Techno Engineering Co., Ltd.
    Inventors: Tominori Ishikawa, Yuji Toyama, Makoto Yokoyama, Yoshihiro Takada, Keiichi Honma, Osamu Kawasaki, Masayosi Inoue, Kazunari Sugai, Jun Tazawa
  • Patent number: 6156089
    Abstract: A system for circulating air which includes particles, bacterial organisms, and odoriferous material includes a fan coupled to ducting of the air circulation system for causing movement of air in a stream through the ducting; a filter holder configured to hold an air filtering device supported within the air stream; and an air filtering device for removing from the circulating air the particles, bacterial organisms, and odoriferous material. The air filtering device may include multiple filter elements having multiple layers of differing filtering materials, which may include activated carbon and potassium permanganate.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: December 5, 2000
    Assignee: Air Kontrol, Inc.
    Inventors: Michael J. Stemmer, Edward C. Sofsky
  • Patent number: 6149698
    Abstract: An apparatus, for installing a ventilation fan, highly effective for preventing dust, gas or the like from coming in a room has been provided by the present invention. An apparatus 1 for installing a ventilation fan comprises a L-shaped housing 5, for fixing a ventilation fan 3 therein, having an inside opening 7 positioned inside a wall W, and an outside opening which looks down and is positioned outside the wall W. The inside opening 7 is provided with a filter 11 for exhaust able to be slide vertically, and able to be taken in and out from the housing 5. Further, the inside opening 7 is covered with a metallic lid 13 able to be open or shut. A filter 15 for absorbed air is provided near the outside opening 9. The filter 15 is able to slide horizontally. The ventilation fan F is rotatable clockwise and counterclockwise. The filter 15 for absorbed is installed in absorbing air. The filter 11 for exhaust is installed in exhausting air.
    Type: Grant
    Filed: October 7, 1996
    Date of Patent: November 21, 2000
    Inventor: Kiyomasa Uehara
  • Patent number: 6149697
    Abstract: An apparatus for removing particles from a fluid stream includes an unobstructed channel for conveying a stream in turbulent flow and a series of objects extending at least along one side of the channel, the objects being closely spaced from each other in the direction of flow so as to define therebetween spaces in which eddies penetrate from the channel to cause collection of particles on surfaces of the objects upon decay of the eddies.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: November 21, 2000
    Assignees: Francis A. L. Dullien, Institut Francais du Petrole
    Inventors: Francis A. L. Dullien, Jean-Charles Viltard
  • Patent number: 6136057
    Abstract: A ventilation and filtering system for vehicles for filtering and circulating air through a vehicle. The ventilation and filtering system for vehicles includes an inlet tube having an outer end in communication with air outside a vehicle, an inner end positioned in a passenger compartment of the vehicle, and an intake fan for blowing air through the inlet tube into the passenger compartment of the vehicle. An exhaust tube has a first end positioned in a passenger compartment of the vehicle, a second end in communication with air outside the vehicle, and an exhaust fan for blowing air through the exhaust tube out of the passenger compartment of the vehicle.
    Type: Grant
    Filed: March 11, 1999
    Date of Patent: October 24, 2000
    Inventors: Anthony Dang, Loretta Redfurn
  • Patent number: 6116249
    Abstract: Method and apparatus for removing dust produced by the treating of human or animal nails. An air current produced by a fan is directed through an adjustable conduit towards the nails being treated. A funnel attached to a second adjustable conduit leading to a filter is positioned beyond the nails so that dust particles are entrained by the air current and carried into the funnel and to the filter. The fan is of sufficient power to cause very fine dust particles to be removed.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: September 12, 2000
    Inventor: Donald Edward Tuffery
  • Patent number: 6117201
    Abstract: A dust collecting container includes an annular lower portion and an annular upper portion having a first circumferential wall interposed between first annular upper and lower ends to define a first columnar chamber of a first length in a first axial direction, and a first annular flange which extends outwardly and radially from the first lower end.
    Type: Grant
    Filed: April 8, 1999
    Date of Patent: September 12, 2000
    Inventor: Meng-Chieh Cheng
  • Patent number: 6102988
    Abstract: There is provided an air delivery device and method of moving and filtering air. The air delivery device comprises a housing having an air inlet and an air outlet. Between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving elements, the rotating air moving elements intersects the flow of air between the air inlet and the air outlet and establishes a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprises at lest one filter element, having at least one upstream filter face and at least one downstream filter face, defining at least one primary flow channel, and rotating along the same axis of rotation as the air moving elements and preferably forming the air moving elements at least in part.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: August 15, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Yuan-Ming Tang, Ricardo Lira, Michael Harms
  • Patent number: 6099608
    Abstract: A filtration system that rotates in conjunction with a blower wheel, and a method of attaching the same. The blower wheel typically has a plurality of fan blades arranged in a spaced relationship radially around a blower cavity to define a flow path extending radially outward from the blower cavity through the fan blades when the blower wheel is rotating. The filtration system includes a filter cartridge releasably attachable to the blower wheel in an engaged configuration. The filter cartridge includes a filter medium defining a generally center opening and a filter surface configured to be positioned generally adjacent to the fan blades and to extend across at least a portion of the flow path. In one embodiment, a plurality of flow passages extending through the filter medium.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: August 8, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Michael Harms, Yuan-Ming Tang, Ricardo Lira, James R. Larson
  • Patent number: 6099607
    Abstract: An adjustably directable clean air delivery supply assembly which provides clean air for use in weather protected environments. This assembly is, doorway passable and rollably positioned, to be utilized where activities require very clean air per strict specifications. When located, the device can quickly be unfolded and positioned for operation to produce clean air in the desired direction at minimal-eddy producing airflow. Surrounding unfiltered air is drawn in just above floor level through a pre-filter into a airtight lower hollow housing, which contains an interior powered air moving assembly, and discharged upwardly into the tower hollow housing which is supported on top of the lower hollow housing. Secured to the tower hollow housing is an adjustable telescoping height and rotatable positioning structural tube, which receives and directs the air upwardly through a self-sealing bellows into the top final filter hood assembly.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: August 8, 2000
    Inventor: William J. Haslebacher
  • Patent number: 6099609
    Abstract: There is provided a moving sorbent filter within an air delivery device. The air delivery device has a housing having an air inlet and an air outlet, between the air inlet and the air outlet is located an air delivery fan having at least two rotating air moving means. The rotating air moving means intersect the flow of air between the air inlet and the air outlet and establish a higher pressure zone at the air outlet relative to the air inlet. The air delivery fan further comprising a moving porous sorbent filter formed of at least one sorbent filter element. The sorbent filter has at least one air passage allowing substantially unimpeded airflow into and through the sorbent filter.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: August 8, 2000
    Assignee: 3M Innovative Properties Company
    Inventors: Ricardo Lira, Yuan-Ming Tang, Michael Harms
  • Patent number: 6090188
    Abstract: An air intake apparatus for semiconductor fabricating equipment reduces the inflow of chemical contaminants, such as ozone (O.sub.3), into the equipment. The air intake apparatus includes a fan as an air intake device, and a chemical filter containing activated carbon to remove the chemical contaminants from air drawn in from outside the equipment. The air intake apparatus may further include first and second filters for removing particulate contaminants from the air. By applying the air intake apparatus to chemical vapor deposition (CVD) equipment used to carry out a process for forming hemispherical grains (HSGs), which is sensitive to a native oxide layer, the ozone density inside the CVD equipment is decreased. Accordingly, the semiconductor device produced has a higher capacitance and enhanced performance.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: July 18, 2000
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chang-jip Yang, Geun-mok Youk, Chong-hyeong Cho, Young-kyou Park
  • Patent number: 6068674
    Abstract: An apparatus for removing particles from a fluid stream includes an unobstructed channel for conveying a stream in turbulent flow and a series of objects extending at least along one side of the channel, the objects being closely spaced from each other in the direction of flow so as to define therebetween spaces in which eddies penetrate from the channel to cause collection of particles on surfaces of the objects upon decay of the eddies.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: May 30, 2000
    Assignees: Francis A. L. Dullien, Institut Francais du Petrole
    Inventors: Francis A. L. Dullien, Jean-Charles Viltard
  • Patent number: 6066194
    Abstract: An apparatus and method for using a programmable variable speed motor to indicate a clogged filter while providing a constant airflow acrcss a wide range of restrictions. A motor has speed and airflow parameters and a built-in constant airflow regulator. A blower unit is connected to the motor to draw air from the inlet to the outlet. A filter reduces airborne particles as air is forced from the inlet to the outlet by operation of the motor and blower. A control system adjusts the airflow parameter of the motor based on the motor speed and environmental conditions such as light and motion. If an electronic air cleaner filter is employed, a discharge counter counts the frequency of pops occurring across the electrodes of that filter. The control system adjusts the voltage across those electrodes based on the discharge counter values.
    Type: Grant
    Filed: April 17, 1998
    Date of Patent: May 23, 2000
    Assignee: American Standard Inc.
    Inventors: Gordon J. Hugghins, Robert W. Helt
  • Patent number: 6045596
    Abstract: The present invention is a filter system self contained within a treatment room for a medical procedure. The filter system is partially incorporated into a standard surgical arm. The filter is mounted on the control unit of the surgical arm, which is at the free end of the surgical arm. A vacuum device to create airflow through the filter is located distant from the filter, but still within the treatment room. The vacuum device is adapted to exhaust either into a portion of the treatment or the HVAC system of the facility in which the treatment room resides. Controls for the filter system are also incorporated into the control unit of the surgical arm.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: April 4, 2000
    Assignee: Medtek Devices, Inc.
    Inventors: Clinton R. Holland, Jr., Earnest R. Moehlau, Christopher A. Palmerton
  • Patent number: 6036737
    Abstract: A safety cabinet having a work area defined by an enclosure and including an air circulation and cleaning system. The air circulation and cleaning system includes a plurality of air plenums and passageways through which air is circulated by a blower assembly. A portion of the air exiting the blower is directed through a transition boot and exhaust plenum and a remaining portion of the air exiting the blower assembly is directed into the work area through a perforated divider plate and a supply plenum. The transition boot between the exhaust and supply plenums include resealable fasteners disposed along a seam between first and second ends thereof and around a first end thereof which is attached to the exhaust plenum.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: March 14, 2000
    Assignee: Forma Scientific, Inc.
    Inventors: Dennis H. Smith, Matt Brooker, Raquel Wager
  • Patent number: 6033301
    Abstract: A fan filter unit is provided for use in filtering air circulating in a clean room. The fan filter unit includes a unit casing; a ventilation fan housed in the unit casing; a dust removal filter in the bottom of the unit casing; and one or more gas absorption filters for removing gases from the circulating air. The one or more gas absorption filters are located in the unit casing such that the ventilation fan can be inspected without removing the one or more gas absorption filters and an inspector can walk on an upper face of the unit casing. In one preferred embodiment, the one or more gas absorption filters are located above the dust removal filter and below the ventilation fan. In a second preferred embodiment, a fan filter unit is provided that includes a plurality of fan filter subunits, each fan filter subunit comprising a unit casing, a ventilation fan housed in the unit casing, and a dust removal filter in the bottom of the unit casing.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: March 7, 2000
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Nobuyuki Suwa
  • Patent number: 6004365
    Abstract: An air filtering device including a circular plate, plurality of fan blades fixedly attached to the circular plate, the fan blades extending downwardly from the lower surface of the circular plate; a filter frame having an air permeable cylindrical inner wall, having an upper wall, having a lower wall, and having an air permeable cylindrical outer wall, the air permeable cylindrical inner wall, the air permeable cylindrical outer wall, the upper wall and the lower wall defining a cylindrical filter media containing space; air filtering media extending annularly around the air permeable cylindrical inner wall within the cylindrical filter media containing space; and, a filter frame attaching mechanism attaching the filter frame so that it extends annularly around the outer edges of the fan blades.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: December 21, 1999
    Inventor: Paul Fiacco
  • Patent number: 5961702
    Abstract: 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 arrangement. The strip-like housing having the fan is bent on the intake side at two opposite sides in an arcuate manner toward the output side, the two longitudinal edges of such wall being joined to two side walls, which are essentially parallel to each other, by folded sheet joints. The free edges, not having any folded joints, of the strip-like wall and the side walls essentially define an outlet opening. Such a housing together with a fan may be produced simply, economically and with a light weight using only three pre-stamped parts using folded or crimped seams and then constitutes a single-piece downwardly open hood-like housing with high class flow properties.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: October 5, 1999
    Assignee: Gebhardt Ventilatoren GmbH & Co.
    Inventor: Wolfgang Doneit
  • Patent number: 5954577
    Abstract: Disclosed are air circulation systems for vehicle heating and cooling system, especially for heating and cooling the passenger compartment and other pertinent compartments of motor vehicles, as well as trains, airplanes, etc. The invention more particularly concerns apparati and methods for improving the air quality in such systems through the use of filters for decontamination of air flows. The invention relates generally to apparati and methods for causing the air flow to pass through a decontamination module to clean the air. Preferred devices of the present invention controls the extent of such cleaning by a by-pass and damper arrangement, which apportions the flow between the module and the by-pass. Various bypass configurations having various flow characteristics are disclosed. The invention has application to both new vehicles as original equipment and older vehicles as added equipment.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: September 21, 1999
    Inventor: Milton Meckler
  • Patent number: 5931991
    Abstract: An induction type of vacuum assembly for use with wet and dry vacuums is described. It includes a motor chamber; a solution chamber and a lower chamber for use inside of a canister that holds water and/or cleaning solution. A central chamber is inside of a solution tank and is in fluid connection with the lower chamber through a cage so as to prevent ingress of water into the motor assembly in the even that the level of the water rises. Foam filter(s) are used in connection with the cylindrical chamber so as to collect dirt and dirty water throughout the vacuuming operation.
    Type: Grant
    Filed: March 11, 1997
    Date of Patent: August 3, 1999
    Inventor: Marty Gerard Leon
  • Patent number: 5904744
    Abstract: An air filter designed to be placed at a definite distance L beyond the periphery of the primary airflow which is created by an operating fan, and attached to a stationary element of the fan or to a stationary element of an enclosed space with fasteners which are, at the same time, vibration isolation units. The present invention greatly reduces the creation and release of fine particles of soot, mold, dust mites, etc. Five modifications of the invention are described, as well as the way to determine a distance L when the fasteners are used with ceiling fans, diffusors and other conventional fans. When an operating fan with a weighted base is used, the base acts as an additional vibration dampening unit, which further limits creation of fine toxic particles.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: May 18, 1999
    Assignee: Anton Kagan
    Inventor: Anton Kagan
  • Patent number: 5893939
    Abstract: An air purifier, an air filter and a method of manufacturing an air filter for an air purifier are provided. The air purifier includes a base assembly, a filter assembly and a grill. A fan is mounted to the base assembly, and draws air through the filter assembly. The base and filter assemblies include adjoining walls having openings which are substantially smaller in area than the areas of the adjoining walls and area through which air is drawn in through the filter assembly. A resilient gasket having a passage approximately the size of these openings is positioned between the adjoining walls. The filter assembly is drawn towards the base assembly when the fan is operated, thereby enhancing the seal formed by the gasket against the adjoining walls. Unfiltered air is accordingly unlikely to bypass the filter assembly. The air filter is manufactured in an efficient manner through the use of a back plate having oblique end portions.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: April 13, 1999
    Assignee: Holmes Products Corp.
    Inventors: William Rakocy, Johnson Hsu, Neville R. Glenn
  • Patent number: 5853440
    Abstract: The invention provides a shroud (10; 40) for use in apparatus incorporating cyclonic dust separation structure for separating dirt and dust from an airflow, the shroud (10; 40) including a perforated portion (14; 44) having a multiplicity of perforations (30; 46) for allowing the airflow to pass therethrough. According to invention, the perforated portion (14) has a lower edge (16) and a lip (18) depending therefrom, the lip (18) including a parallel-sided portion (34) having an inclined distal end and a step (38) formed radially inwardly of the parallel-sided portion (34) and at the proximal end thereof. The invention improves performance of the dust separation apparatus in conjunction with which the shroud (10; 40) is utilized.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: December 29, 1998
    Assignee: Notetry Limited
    Inventor: James Dyson
  • Patent number: 5849053
    Abstract: Energy conservation structure is provided for a controlled environment room having an opening in a wall thereof through which work is passed and through which room air under pressure may be discharged from the room, thereby to prevent contamination of the room air by contaminants in outside air entering the room through such opening, the energy conservation structure including structure providing suction adjacent to the wall opening to induce the flow of room discharge air thereto, the latter structure being constructed and arranged for communication with structure and apparatus for recycling the discharge air of such induced flow to the controlled environment room.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: December 15, 1998
    Inventors: Michael P. Napadow, Thomas L. Rowe
  • Patent number: 5843197
    Abstract: A particulate removal apparatus for use in soldering operations having a housing with an inlet opening formed therein and an interior cavity, a filter positioned within the housing for removing particles from air passing therethrough, an impeller positioned within the interior cavity of the housing, and a motor positioned within the interior cavity of the housing and positioned between the impeller and the filter. The impeller has backward inclined impeller blades. The impeller pulls air through the inlet opening and directs the air toward a wall of the interior cavity. The impeller blades generally surround the interior opening. The filter is a HEPA filter positioned within a framework within the housing. The HEPA filter is arranged in an accordion-style folded configuration within the framework.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: December 1, 1998
    Inventor: Bryan Rossnagel
  • Patent number: 5840092
    Abstract: An air treatment system having a relatively large capacity yet a relatively small footprint and low sound level. The air treatment system includes a housing defining adjacent vertically extending inlet and outlet chambers. A blower is mounted within the inlet chamber to move air through the system. A generally planar filter is contained within the outlet chamber and is spaced apart from the rear wall of the housing to define a plenum. The rear wall of the housing is curved so that the plenum is tapered to provide uniform pressure over the face of the filter. The system is adapted to rest upon the floor or mount either vertically or horizontal to a wall. Additionally, the system includes a control mechanism that allows the system to run at full speed for a predetermined period of time and then automatically return to its previous speed level.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: November 24, 1998
    Assignee: Amway Corporation
    Inventors: Bradley G. Rick, John F. O'Connor, Jr.
  • Patent number: 5840102
    Abstract: A material transfer apparatus and method, the apparatus having a material separating container, a filter unit, a vacuum unit and an exhaust unit, all mounted on a mobile conveyance. Air, carrying the materials to be transferred, is drawn through pneumatic tubing into the separating container where large and small materials are separated, and then into the filter where it is filtered for re-entry into the atmosphere.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: November 24, 1998
    Inventor: Hilton G. McCracken
  • Patent number: 5833727
    Abstract: An air filtering module for supplying air comprising a module housing having a rear plenum portion and a front frame portion united together. The plenum portion has a rear air inlet opening. The frame portion has a planar front air outlet opening and has a continuous outer perimeter wall extending substantially perpendicular to the plane of the air outlet opening. A replaceable air filter cartridge and a fan assembly are mounted in the module housing. A perimeter barrier gasket is permanently united to the outer perimeter wall. A plurality of perimeter connecting structures permit mechanical fastening of the outer perimeter walls of adjacent module housings together in an array of modules in a manner compressing the barrier gasket to block air flow between the module housings. The module housings are easily separated from a fastened condition without damage to the perimeter barrier gasket for reconfiguration of an assembly of module housings reusing the barrier gasket.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: November 10, 1998
    Inventor: Darrell L. Skarsten
  • Patent number: 5827118
    Abstract: A storage system for storing clean room products includes an enclosed compartment located within or adjacent to a clean room. The compartment includes storage sheles and a horizontal air flow system that includes an air filter, an air exhaust, a blower, and a plenum.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: October 27, 1998
    Assignee: Seh America, Inc.
    Inventors: Roy P. Johnson, Donald L. Wilkinson
  • Patent number: 5817158
    Abstract: A device for separating foreign material from air. An inlet conduit is mounted to a receptacle for receiving air and foreign material. A perforated tube is mounted within the inlet conduit and extends along the length thereof. An inner wall surrounds the perforated tube and forms a side air outlet through which a portion of the air within the passage formed by the tube may escape via a pump. The pump is operable to force the air and foreign material into the perforated tube so that the kinetic energy of the foreign material is sufficiently great to prevent the foreign material from adhering to the tube immediately adjacent the side air outlet. In a version of the preferred embodiment, a pair of pumps are in fluid communication with the perforated tube.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: October 6, 1998
    Assignee: Air Equipment & Engineering, Inc.
    Inventor: Donald G. Cox
  • Patent number: 5814116
    Abstract: An arrangement for generating a purified, low-turbulence air flow for supplying local clean rooms is aimed to reduce the constructional depth of an air processing installation and, in addition, to extensively prevent the transmission of vibrations from the air flow-generator to the equipment unit to be supplied. The wall of the plenum chamber located opposite an outlet opening in the plenum chamber adjoins a filter accommodated in a plenum chamber at the side for the inlet of unpurified air. A space remains open between the wall and the filter. This space communicates with the rest of the space in the plenum chamber and serves primarily to form the plenum. The arrangement is applicable in the manufacturing of integrated circuits.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: September 29, 1998
    Assignee: Jenoptik Aktiengesellschaft
    Inventors: Heinz Schneider, Klaus Schultz
  • Patent number: 5810896
    Abstract: An air filtration and purification system for the interior of a closed vehicle, including an outside air intake and an inside air intake, both the intakes empty into a common plenum located interior of the vehicle, an air passageway defined by an inlet, in fluid communication with the plenum, and an outlet spaced-apart therefrom for removing the air in the plenum, a plurality of purifying air filters arranged in series in the passageway, a first air movement device interposed the plenum and said passageway inlet to create a flow of air from the plenum to the filters, a second air movement device in the outlet of the passageway to draw said flow of air across the filters, and a vent device in fluid communication with the second air movement device for distributing the filtered air from the second air movement device into the vehicle.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: September 22, 1998
    Inventor: Mark Clemens
  • Patent number: 5807414
    Abstract: A workbench suited for welding, grinding, and polishing operations features a multi-panel table top. The panels each have a high number of perforations to allow a high rate of air flow at a relatively low noise level. An optional backwall or a booth can be mounted atop the tabletop. Each also has perforations to collect dust from the air flow.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: September 15, 1998
    Assignee: Sportsman Manufacturing Company
    Inventor: Richard F. Schaefer
  • Patent number: 5787903
    Abstract: A workstation apparatus for use by manicurists in the application of artificial nails and the like, to protect the technician and client from the debris and vapors generated in the nail application process. The provides a covered working surface and circulates the contaminated air through purifying filters, and conditions the temperature and humidity of the air, before returning the air to the work surface.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: August 4, 1998
    Inventor: Mary Jane Blackshear
  • Patent number: 5769916
    Abstract: A filter ventilator for installation in an opening of a wall of a switchgear cabinet or the like, having a base housing receiving the filter, which is covered with a finned screen and which is connected with a ventilator on a side facing away from the finned screen. For a considerably simplified mounting of the filter ventilator, detent cams are molded on the base housing for fastening the ventilator. The detent cams engage bores in the facing flange of the ventilator. L-shaped holding elements are formed on the base housing which, facing the flange of the ventilator which faces away from the finned screen, have detent cams which engage bores of the flange. The L-shaped holding elements and the base housing form receivers, into which the ventilator, which is placed angularly offset on the base housing, can be rotated to a stop.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: June 23, 1998
    Assignee: Rittal--Werk Rudolf Loh GmbH & Co. KG
    Inventor: Manfred Immel
  • Patent number: 5762667
    Abstract: An air treatment system having a relatively large capacity yet a relatively small footprint and low sound level. The air treatment system includes a housing defining adjacent vertically extending inlet and outlet chambers. A blower is mounted within the inlet chamber to move air through the system. A generally planar filter is contained within the outlet chamber and is spaced apart from the rear wall of the housing to define a plenum. The rear wall of the housing is curved so that the plenum is tapered to provide uniform pressure over the face of the filter. The system is adapted to rest upon the floor or mount either vertically or horizontal to a wall. Additionally, the system includes a control mechanism that allows the system to run at full speed for a predetermined period of time and then automatically return to its previous speed level.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: June 9, 1998
    Assignee: Amway Corporation
    Inventors: Bradley J. Pippel, Dale Aberegg
  • Patent number: 5762665
    Abstract: A vehicular air purification system for use with a vehicle having a ventilation system with a plurality of output vents each including a plurality of horizontally positioned directing vanes. Included is an active filter unit housing with a rectilinear configuration having a closed top face, a closed bottom face, a front face, a rear face, and a pair of closed side faces defining an interior space. The rear face and the front face both have a plurality of horizontal ventilation slots. One of the faces of the active filter unit housing has a clip adapted to allow the active filter unit housing to be removably attached within the vehicle. A motor support situated within the active filter unit housing is included for bracing a motor situated therein. The motor has a stator fixedly coupled to the motor support with an axis defined by the motor positioned perpendicularly with respect to the front face and the rear face of the active filter unit housing.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: June 9, 1998
    Inventors: Nichan A. Abrahamian, Kathleen Abrahamian