Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7320636 | Exhaust fan assembly having flexible coupling An exhaust assembly is provided for expelling contaminated air from a building. The assembly includes a plenum, a fan assembly attached to the plenum, and a windband mounted on top of the fan assembly. The fan assembly is constructed of cylindrical outer and inner w... | 01/22/2008 |
| 7318771 | Air-isolator fume hood The present invention is a fume hood capable of exhausting contaminant, having an air pipe in a sash and a suction slot corresponding to the air pipe deposed at the front rim of the bottom surface to obtain an air curtain, where contaminant is efficiently prevented ... | 01/15/2008 |
| 7247087 | Fume hood with air directing member A fume hood adapted to be connected to an exhaust system, the fume hood including a cabinet formed with a chamber having a generally flat bottom wall and a sash door mounted at the front end of the chamber for movement in a vertical plane to provide an access openin... | 07/24/2007 |
| 7241616 | System for culturing human cells and tissues Disclosed is a human cell/tissue culturing system including a plurality of incubators, each incubator capable of aseptically storing/culturing cell(s) or tissue(s) derived from a (human) individual and identifying the cell(s) or the tissue(s) during incubation, wher... | 07/10/2007 |
| 7217183 | Turbulence-free laboratory safety enclosure The present invention relates to controlled airflow and air distribution within a laboratory safety enclosure and in particular, to turbulence-free airflow within a laboratory fume hood. The fume hood of the present invention has a work chamber and an access opening... | 05/15/2007 |
| 7108478 | Blower housing and cabinet with improved blower inlet airflow distribution An airhandling unit for an HVAC system includes a cabinet having an electric motor driven centrifugal blower disposed therein. The blower includes a scroll or volute type blower housing which may be formed of opposed releasably connectable housing parts. The blower ... | 09/19/2006 |
| 7066091 | Methods and apparatus for controlling impurity levels in an enclosed printing press environment Methods and apparatus for controlling impurity levels in an enclosed printing press environment are disclosed. A disclosed system controls impurity levels by using variable speed fans to control the intake of air into the enclosed environment and the exhausting of a... | 06/27/2006 |
| 6797029 | Process facility having at least two physical units each having a reduced density of contaminating particles with respect to the surroundings In a process facility for producing semiconductor wafers, a third physical unit is configured between two physical units that produce mini environments. The third physical unit has a laminar flow at right angles to the laminar flows of the two physical units and is ... | 09/28/2004 |
| 6692346 | Fume hood with alarm system A fume hood includes a top, bottom sidewalls, front panel and a back panel that define an enclosed workspace. The fume hood also includes a movable sash for opening and closing an access opening. The fume hood may also include an air chamber having an inl... | 02/17/2004 |
| 6632260 | Adjustable clean-air flow environment Enclosures having adjustable clean gas flow environments and methods of enclosed pressure differential distribution technology. Specifically, clean gas flow enclosures, which provide for the isolation of materials from airborne micro-particulate contamina... | 10/14/2003 |
| 6582292 | Fume hood with rotatable airfoil A fume hood includes a top, bottom sidewalls, front panel and a back panel that define an enclosed workspace. The fume hood also includes a movable sash for opening and closing an access opening and an airfoil disposed proximate an edge portion of the ope... | 06/24/2003 |
| 6428408 | Low flow fume hood A fume hood is provided having an adequate level of safety while reducing the amount of air exhausted from the hood. A displacement flow fume hood works on the principal of a displacement flow which displaces the volume currently present in the hood using... | 08/06/2002 |
| 6154686 | Distributed architecture A system for controlling the operation of a laboratory with a fume hood having a sash. The system includes an intelligent occupancy monitor mechanism. The system includes an intelligent sash closure mechanism. The producing mechanism and the controlling m... | 11/28/2000 |
| 5797790 | Fume hood A compact fume hood arrangement includes a bypass channel mounted to a top panel of the fume hood which effectively extends a front open face of the fume hood upwardly providing an air path through the bypass channel which provides sufficient air flow to ... | 08/25/1998 |
| 5764579 | System for controlling laboratories with fume hoods A system for controlling laboratories having fume hoods comprising a network along which information is carried. The system is also comprised of a controller in contact with the network for receiving information from and providing information to the netwo... | 06/09/1998 |
| 5470275 | Method and apparatus for controlling fume hood face velocity using variable by-pass resistance A fume hood controller and method which compensates for resistance to air flow through a by-pass opening that exists due to a grille or louvre overlying the by-pass opening.... | 11/28/1995 |
| 5312297 | Air flow control equipment in chemical laboratory buildings In the air flow control system of a laboratory building module, pressurization of corridors and other residual areas can be maintained neutral in relation to the outdoors by balancing the entire intake or supply flow rate and the entire exhaust rate. The ... | 05/17/1994 |
| 5295334 | Sash sensor base plate assembly An apparatus for mounting a device for determining the position of a sliding sash door in a laboratory fume hood in the track of the sash door. This apparatus securely and permanently mounts the sensing means in the track even after exposure to corrosive ... | 03/22/1994 |
| 5205783 | Air flow control equipment in chemical laboratory buildings In the air flow control system of a laboratory building module, pressurization of corridors and other residual areas can be maintained neutral in relation to the outdoors by balancing the entire intake or supply flow rate and the entire exhaust rate. The ... | 04/27/1993 |
| 5092227 | Apparatus for controlling the ventilation of laboratory fume hoods Apparatus for controlling the air flow through a fume hood to maintain a predetermined average face velocity through an uncovered portion of an opening of a fume hood of the type which has at least one movable sash door adapted to cover the opening as the... | 03/03/1992 |
| 5090304 | Apparatus for determining the position of a moveable structure along a track A sensing means for determining the absolute position of one or more structures such as doors, windows or the like that are moveable in sets of tracks. Apparatus comprises an electrical switching means having an elongated electrical resistance means with ... | 02/25/1992 |
| 4893551 | Fume hood sash sensing apparatus An apparatus for sensing the extent to which the opening of a fume hood is uncovered by the hood sashes, and is particularly adapted for use with hoods having sashes which are moved horizontally. Radiation from a radiation emitter, such as an optical or a... | 01/16/1990 |
| 4856420 | Fume hood Fume hoods with sash controlled airflow paths are provided with inwardly inclined upright transparent sash and outwardly inclined transparent top panels to increase visibility of the hood interior. The tilted or angled transparent upright sash facilitates... | 08/15/1989 |
| 4741257 | Fume hood air flow control A control system is provided for providing a constant flow of air through a chamber, such as a fume hood, by measuring the pressure of the air outside of the hood and comparing it with the pressure of the air within the hood and adjusting the flow of air ... | 05/03/1988 |
| 4534281 | Laboratory fume hood An improved laboratory fume hood is the subject of the present invention. A cabinet structure presents an enclosed work area defined by sidewalls, a back wall, and an access opening. Each of the sidewalls presents first and second planar surfaces disposed... | 08/13/1985 |
| 4436022 | Fume hood incorporating high efficiency auxiliary air plenum An auxiliary air fume hood provided with an improved airflow system for controlling the passage of air through an auxiliary air housing and orienting the flow of air in front of the face of the hood. The hood is designed to capture the auxiliary air throu... | 03/13/1984 |
| 4399740 | Fume hood with dual room air inlet systems A laboratory fume hood with a horizontally slidable sash that is operatively coupled to and actuates a laterally movable damper in a manner inverse to sash movement. As the sash opens, the damper closes. Conversely, as the sash closes, the damper opens.... | 08/23/1983 |
| 4399741 | Method of controlling room air flow into a fume hood A method of controlling room air flow into a horizontal sash type laboratory fume hood. The method includes laterally moving a damper across a room air vent by means of horizontal motion of the sash so that the vent opens and closes in an inverse manner t... | 08/23/1983 |
| 4377969 | Automatic fume hood airflow control Laboratory fume hoods with open hood faces closed by door sash are provided with an automatic airflow control regulating the quantity of air drawn into the hood in response to movement of the door sash for maintaining a controlled velocity of air through ... | 03/29/1983 |
| 4361137 | Incubator having warm air curtain across access opening An incubator arranged for developing a warm air curtain (30) across the opening created when the access door (22) of the incubator is opened.... | 11/30/1982 |
| 4177718 | Fume hood A fume hood with an air actuated valve system for directing a mixture of room and external air in front of a horizontal sash when such sash is open, and behind this sash when it is closed.... | 12/11/1979 |
| 4023473 | Fume hood A fume hood is provided having an air intake and an air exhaust communicating with each other through the interior of a fume hood cabinet by way of a by-pass passageway and open front on said cabinet. A plurality of sashes are carried by track means which... | 05/17/1977 |
