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| Number | Title | Issue Date |
| 8087980 | Positive air pressure isolation system An air-pressure-control system, the system comprising a system inlet, a system outlet, and a variable-speed fan configured to operate at a speed. A motor controller in communication with the fan is configured to control the speed of the fan. A differential-pressure ... | 01/03/2012 |
| 7625277 | Positive air pressure isolation system An air-pressure-control system, the system comprising a system inlet, a system outlet, and a variable-speed fan configured to operate at a speed. A motor controller in communication with the fan is configured to control the speed of the fan. A differential-pressure ... | 12/01/2009 |
| 7361304 | Building decontamination with vaporous hydrogen peroxide When microbial contamination is introduced into a room (20*) of an enclosure, such as a building, an HVAC system including supply ductwork (16) and a return ductwork (34) is decontaminated with hydrogen peroxide vapor. A decontamination controll... | 04/22/2008 |
| 7302959 | Low-power wireless inflatable bladder damper for forced air heating, ventilation, and air conditioning systems A low-power, wireless, inflatable bladder damper device for controlling the flow of air through an airflow channel, and a method of operation for the same. Rather than requiring power supply and/or control wiring for operation of a wireless damper device, a low-powe... | 12/04/2007 |
| 7287929 | Smart bollard A smart bollard includes a compartment wherein a smart bollard circuit may be located and the smart bollard circuit, in turn, includes at least one processor, a transceiver that may be connected in circuit with the processor and configured to communicate with a cent... | 10/30/2007 |
| 7238106 | Air delivery system The present invention relates to a system for delivering temperature and flow rate controlled warmed air to outlets for use in various apparatus. The system is typically in residential structures, such as homes, but could easily be adapted for apartment buildings as... | 07/03/2007 |
| 7216497 | Slope predictive control and digital PID control The present invention provides an airflow control loop that uses averaged airflow measurements without the problems that are normally encountered with averaging measurements, such as the delay introduced into the airflow control loop. This is accomplished, in the pr... | 05/15/2007 |
| 7213464 | System for visually monitoring pressure in an enclosed space A compliant balloon having an outer reflective surface which is positioned next to a transparent window which has an opaque element thereon, the reflection of the opaque element from the outer reflective surface of the balloon being visible when the outer reflective... | 05/08/2007 |
| 7201787 | Air cleaner and method of controlling operation thereof An air cleaner and method of controlling an operation of the same is disclosed. The air cleaner includes a cabinet having an inlet and an outlet; a filter assembly removing dust and smell particles from a room air; a fan; a sensor assembly sensing the composition of... | 04/10/2007 |
| 7101420 | Self cleaning air filtration machine and a method for using the same Self cleaning air filtration machine and a method for using same comprising; a filter with a motor driven belt or disk or counter rotating disks that are perforated, a spray bar, a recirculation pump and supply line, a wet tank, a ultrasonic transducer, ultraviolet ... | 09/05/2006 |
| 7068161 | Method and system for analyzing the security of a facility A method and system for analyzing the security of a facility. The security system evaluates whether the elements of a facility comply with security requirements and provides a graphical representation of the facility with the results of the evaluation displayed. The... | 06/27/2006 |
| 7062830 | Installation of a retrofit HVAC zone control system A method of retrofitting a home automation zone climate control system into an existing HVAC system. A respective air tube is pulled through each vent of the ductwork, directly or by an intermediate line, by a parachute which is sucked from the vent to the plenum by... | 06/20/2006 |
| 6994620 | Method of determining static pressure in a ducted air delivery system using a variable speed blower motor Systems and methods of determining static air pressure in an HVAC system are provided. Static air pressure is mathematically determined as a function of system parameters, such as blower speed, blower diameter, system volume airflow rate, and/or blower motor torque.... | 02/07/2006 |
| 6979260 | Method and device to prevent indoor release of carbon monoxide and smoke from combustors A device to prevent indoor release of carbon monoxide and smoke from indoor combustors (stoves, furnaces, fireplaces, etc.). The device is based on a discovery that safe operation of indoor burners requires the air pressure in the room housing the burner to be relat... | 12/27/2005 |
| 6976911 | Method and apparatus for filtering airborne contaminants A method and apparatus for removing airborne contaminants in residential or commercial buildings injects filtered air into these enclosures. Prior to be injected in these enclosures, the air is filtered for chemical, biological or radioactive hazards. The filtering ... | 12/20/2005 |
| 6945867 | Movable grating control A grating assembly drive means is connected to control the movement of the movable grating between OPEN and CLOSED positions relative to a fixed grating. The drive means moves the movable grating through yieldable connection when moving toward CLOSED position, where... | 09/20/2005 |
| 6787104 | Detection and treatment of chemical weapons and/or biological pathogens A system for detection and treatment of chemical weapons and/or biological pathogens uses a detector system, an electrostatic precipitator or scrubber, a circulation system, and a control. The precipitator or scrubber is activated in response to a signal from the de... | 09/07/2004 |
| 6758744 | Building interior air pressure control system A method for controlling building interior air pressure that is different from external environment air pressure, wherein the internal and external air pressure difference can be significantly large. The internal and external air pressure difference is maintained th... | 07/06/2004 |
| 6694759 | Pressure control of cooling fluid within a plenum using automatically adjustable vents Cooling fluid pressure within a plenum of a cooling system is controlled by activating the cooling system, sensing pressure within the plenum in at least one zone of the data center, determining whether the pressure is within a predetermined pressure rang... | 02/24/2004 |
| 6681863 | Method and device for preventing distribution of fire gases in a ventilating system A method and device for preventing distribution of fire gases in a ventilating system that serves a number of fire compartments (15, 16), the ventilating air, during normal operating conditions, having a certain predetermined direction of flow at the inle... | 01/27/2004 |
| 6328647 | Pressure differential detecting system, and method of use A differential pressure detecting system having a compliant first chamber, which is contained within a second environment, in combination with a sensor system for monitoring change in volume/shape of the compliant first chamber. In use the internal volume... | 12/11/2001 |
| 6293861 | Automatic response building defense system and method A building protection system and method is provided which is responsive to the release of hazardous agents both outside and inside of a protected building. For an outside release, an array of sensors surrounding the perimeter of the building is triggered ... | 09/25/2001 |
| 6283851 | Make up air equipment control A system for controlling make-up air apparatus for a controlled building space includes a first sensor for sensing the operation of a first appliance within a building space. The appliance causes the air to be exhausted from the controlled building space.... | 09/04/2001 |
| 6120606 | Gas vent system for a vacuum chamber The present invention provides a gas vent system for a vacuum chamber. The particle placed onto the wafer after loading out from a vacuum chamber can be greatly reduced by the system design. The gas vent system has a gas supply, an anti-vibrating tube, a ... | 09/19/2000 |
| 6085834 | Air handling system An air handling system for heating, ventilating and air-conditioning systems to provide a variable air flow between an air treatment section and an air bypass section includes selectively sliding panels to vary the air flow between the air treatment secti... | 07/11/2000 |
| 5902182 | Air exchange and cleaning system for building enclosure, particularly indoor firing range An air exchange and cleaning system for building enclosures, particularly indoor firing ranges, which removes particulate matter, such as lead and other heavy metals, and gun powder residues and gases from the enclosure atmosphere. An air handler unit inc... | 05/11/1999 |
| 5863246 | Variable air volume control system A system controls the pressure at which conditioned is to be provided to one or more zones to be heated or cooled by the conditioned air. The system actively computes a setpoint for the pressure with a location in a duct system upstream of where any of th... | 01/26/1999 |
| 5769315 | Pressure dependent variable air volume control strategy A control strategy for rejecting supply air temperature disturbances in variable air volume air conditioning units using staged DX cooling. The strategy, and corresponding system, minimizes supply air temperature disturbances by controlling zone air dampe... | 06/23/1998 |
| 5720658 | Space pressurization control system for high containment laboratories An apparatus and method for space pressure control in high containment laboratories. The system comprises a volumetric air flow controller and a differential pressure controller. The differential pressure controller couples to the volumetric air flow cont... | 02/24/1998 |
| 5676596 | Controller for animal enclosure ventilation system A control device for operating drive motors of closure devices that is reponsive to air pressure differential inside and outside an enclosure and including a housing that will extend through a wall of the enclosure, vanes in the housing and adjustably wei... | 10/14/1997 |
| 5669815 | Barometric damper with magnetic latch A barometric damper has a housing which is adapted to be coupled with a structure. The housing has an opening that allows spatial communication between the interior and the exterior of the structure. The damper also has a damper blade. The damper blade is... | 09/23/1997 |
| 5336131 | Differential pressure control apparatus for livestock houses A method for ventilating an animal enclosure using a plurality of closable ventilation openings. Sensors measure ambient outside temperature and ambient atmospheric pressure. A controller correlates said measurements for temperature, and pressure to deter... | 08/09/1994 |
| 5131887 | Pressure controlled fresh air supply ventilation system using soil gas pressure as a reference, and method of use A ventilation system allows for a user adjustable minimum inlet fresh air volume inflow rate, a user adjustable minimum exhaust air volume outflow rate, for an enclosed space, and provides for automatic adjustment of the air volume flow rate(s) to maintai... | 07/21/1992 |
| 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 |
| 5072656 | Method and apparatus for controlling the transfer of tubular members into a shelter A portable drilling apparatus 10 designed to be used in environmentally severe locations, such as the Arctic, includes provisions for heating various portions thereof, including a pipe shelter 14. The pipe shelter 14 is used to store, warm, and clean the ... | 12/17/1991 |
| 5042997 | Air control system providing healthful enclosed environment An environmental control system providing a healthful environment in an enclosed structure for people living, working, travelling, or spending leisure time in the structure. The environmental control system may include a heating, ventilating and air condi... | 08/27/1991 |
| 5003865 | Pressure controlled fresh air supply ventilation system soil gas pressure as a reference, and method of use A ventilation system and the method of its use, the ventilation system is typically, though not exclusively, used with tight houses or buildings in which many of the cracks which can allow air and contaminates to randomly enter and exit have been sealed. ... | 04/02/1991 |
| 4995307 | Variable air volume ventilation system and method Generally there is provided for placement in the supply and return air ducts of a building ventilation system, a unique flow control unit having an orifice, static pressure sensors on opposite sides of the orifice, and sensor controlled dampers to regulat... | 02/26/1991 |
| 4993313 | Control system for doors of a negative air pressure enclosure An entranceway to an asbestos contaminated work area includes solid doors for a rapid escape from a contaminated work area due to an emergency such as a fire and the dangers posed by exposure to smoke. Also during a power failure it is easy for the worker... | 02/19/1991 |
| 4960041 | Regulation of atmospheric conditions within a confined space An improved system for maintaining atmospheric conditions within prescribed parameters throughout the interior of a building. The building interior is essentially an enclosed system and sufficient outside air is admitted through air handling units to cont... | 10/02/1990 |
