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| Number | Title | Issue Date |
| 7198567 | Desktop-type ventilation system A desktop-type ventilation system generally includes a ventilation hub having at least one vent and at least one fume hood connected thereto. The fume hood(s) generally include a pair of side walls, wherein each is disposed at an angle for directing and causing air ... | 04/03/2007 |
| 7188636 | Containment cart A portable enclosure apparatus is provided with a frame assembly having a bottom wall, an upper frame member and a single pair of vertical support members. The support members are easily length adjusted by a single user to vary the height of the system while in use.... | 03/13/2007 |
| 7134444 | Environmental containment unit A portable enclosure, easily erectable and collapsible, to provide environment control and prevent contaminants from being released from the enclosure. The enclosure provides a flexible envelope attached to the interior of the space defined by vertical and horizonta... | 11/14/2006 |
| 7001263 | Air flow monitoring and control system with reduced false alarms An air flow monitoring and control system with reduced false alarms includes an alarm sensor for monitoring air flow in a fume hood or the like, set to provide a warning if air flow drops below a predetermined amount. A local controller monitors the alarm, and disab... | 02/21/2006 |
| 6974375 | Double vent dust collection hood with inspection lighting, storage shelf and sandpaper dispensers A sanding hood has a bottom vent for above a bottom shelf attached to a sanding bench with the shelf aligned with the top of the bench. A series of halogen lights attach above the bottom vent to shine on the bench. An upper shelf above the lights shields the worker'... | 12/13/2005 |
| 6966937 | Patient isolation unit A patient isolation unit including a foldable frame body, a flexible envelope made of a flammable resin sheet which can be attached to the assembled frame body, and an exhauster to discharge or exhaust the air from the envelope. The exhauster includes a UV lamp, an ... | 11/22/2005 |
| 6923715 | Device for regulating the air volume flow for a vent in a laboratory A device for regulating the air volume flow for a laboratory exhaust, has a rectangular housing (6) which can be arranged on the laboratory exhaust. The device is equipped with inflow devices that can be connected to the interior of the laboratory exhaust and... | 08/02/2005 |
| 6785981 | Restriction detecting systems for clothes dryer exhaust systems A restriction sensor system for identifying the existence of blockages in exhaust conduits of clothes dryers. The restriction sensor system may include a pressure sensing device having a body configured to be coupled to an exhaust conduit of a clothes dryer. The pre... | 09/07/2004 |
| 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 |
| 5551916 | Tornado protection system A pressure stabilizing system for equalizing the pressure within an enclosure and the atmosphere during rapidly developing low pressure atmospheric conditions comprising a duct with a blow out valve or a valve positively operated by an electrical or gas o... | 09/03/1996 |
| 5115728 | System for controlling the differential pressure of a room having laboratory fume hoods A system whereby the pressure of a room containing one or more fume hoods, such as a laboratory, is to maintained at a predetermined level relative to the pressure of a reference space in the building, which may be the pressure in an adjacent corridor or ... | 05/26/1992 |
| 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 |
| 5088387 | Fluidized bed fluid pressure regulator A method and apparatus for venting purge fluid from an enclosed housing to maintain a positive known reference pressure differential between the housing and the variable pressure atmosphere surrounding the housing. The apparatus utilizes a specially desig... | 02/18/1992 |
| 5083501 | Ventilation window unit A window unit is provided for reducing heat loss through the window while at the same time providing a desirable inflow of prewarmed ventilation air to maintain interior air quality and thermal comfort. The window unit comprises an outer window frame and ... | 01/28/1992 |
| 5081913 | Air vent closure system An automatic ventilator closure is described which operates on the basis of an over-pressure within the conduit leading up to the ventilator outlet. Electrical interlocks control a motor to place the closure in an open or closed condition.... | 01/21/1992 |
| 4928581 | Negative air control unit and closure structure A portable negative air control unit and closure structure which can be utilized therewith to form enumerable different configurations. The basic unit includes a base which can be a shower containment pool, at least one closure structure having a door the... | 05/29/1990 |
| 4902315 | Negative pressure asbestos removal with localized make-up air A method of removing airborne contaminant material from a work area by isolating the work area from the surrounding environment, providing at least one entrance into the isolated work area, and creating a negative pressure within the isolated work area by... | 02/20/1990 |
| 4898086 | Living space ventilation At dawn the outside air is coolest over the 24 hour daily cycle. A photo electric device actuates a fan just after dawn to ventilate the house and is later switched off by a time delay device. Existing fans may be used.... | 02/06/1990 |
| 4848653 | Ridge vent with shape-memory actuated heat valve An improved actuator for the damper of a ridge vent. The actuator includes coil springs constructed from a shape-memory alloy. The springs are contracted below a selected temperature at which the damper is to open, and the contracted springs maintain the ... | 07/18/1989 |
| 4569208 | Pressure relief port A pressure relief port for relieving the pressure within an enclosure having a wall with first and second sides and a first opening therethrough. The pressure relief port includes a tube having a conduit therethrough sized to fit in the first opening in t... | 02/11/1986 |
| 4193338 | Gas dispersion system A gas dispersion system for dispersing noxious gas released into the atmosphere within a contained ground area to prevent its passing at an unacceptable concentration to a neighboring ground area to be protected, comprising means responsive to the release... | 03/18/1980 |
| 4116213 | Air pressure control apparatus for a hot or cold storage chamber A regulator of air pressure within a hot or cold storage chamber which comprises a damper and frames. The damper is disposed within an opening provided at a wall of the storage chamber defining an air passage, and the frames are airtightly in contact with... | 09/26/1978 |
| 4040042 | Exhaust apparatus and monitoring circuit therefor The present exhaust apparatus has a housing with a tiltable front wall and a tiltable bottom wall. The front wall carries the fan unit proper with its drive motor and filter and the tiltable bottom wall may be provided with a light. In order to monitor th... | 08/02/1977 |
