Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7338358 | Apparatus for air purifying and ventilating Disclosed is a combination air purifier and ventilator. The air purifier in accordance with the present invention includes a case being provided on a ceiling or a wall and having a fan therein, a first passage communicating with an outside, an inside of the case and... | 03/04/2008 |
| 7195290 | Apparatus for a fire-rated duct A duct system comprising duct sections which are factory manufactured and field modifiable. The field modifiable duct system comprises fire resistant materials and is fire-rated. The duct sections when assembled create a continuous conduit that allows air to flow fr... | 03/27/2007 |
| 7179054 | Flow reversal system for axial fan An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotatio... | 02/20/2007 |
| 7125332 | Ceiling radiation damper and mounting method A ceiling damper system that comprises a damper housing having an input opening to accept air from a heating, ventilation and air conditioning HVAC system, and an output opening to supply the HVAC air to a room. The system further comprises a damper mechanism to sub... | 10/24/2006 |
| 6991536 | Air flow controller and fire damper in an air flow duct A fire damper in an air duct (2) is formed by a flap (12) which in its closed position bears on a flange (6) which extends inward from the duct wall, to form a seal. The flap (12) is biased to the closed position and held open by a cable ... | 01/31/2006 |
| 6752714 | Fire resistant air transfer grille or damper A fire resistant air transfer grille or damper (10), suitable for use as a ventilating means in fire resistant doors, walls and ventilation ducts, includes an outer frame (12) and a plurality of slats (14). Each of the slats (14) is provi... | 06/22/2004 |
| 6688968 | Method and apparatus for protecting buildings from contamination during chemical or biological attack Methods and systems are provided for preventing contamination of building regions or zones from unwanted chemical or biological agents during and after a chemical or biological attack. One or more inflatable occlusion devices are preferably provided for o... | 02/10/2004 |
| 6585583 | Emergency air supply device for fire accident The present invention provides an air supply device for fire accident, comprising an air supply pipe covered by a protective insulating layer buried at the bottom of a cement wall in the building, and such pipe tube having an air valve and an indicating s... | 07/01/2003 |
| 6428680 | Method of providing safe haven within buildings during chemical or biological attack A room in a building serving as a safe haven for human inhabitants against harmful agent attack such as chemical or biological weapon attack. The room provides an environment sealed from air-carried harmful agents wherein the sealing can be accomplished b... | 08/06/2002 |
| 6398118 | Thermostat incorporating thin film carbon dioxide sensor and environmental control system A system for monitoring and modifying the quality and temperature of air within a conditioned space includes a blower unit, a damper unit for selectively admitting outside air into the conditioned space, a temperature moderating unit and a control unit. T... | 06/04/2002 |
| 6072397 | Method and apparatus for reducing flame emissions from an electronics enclosure A method and apparatus which reduces flame emissions from an electronics enclosure in the event of a fire within the enclosure. At least one fan is utilized to provide air flow along an air flow path between an air intake port and an air exhaust port of t... | 06/06/2000 |
| 5957772 | Fire rated wall damper assembly A fire damper having a surrounding frame positioned rearwardly of a register or grill diffuser within a construction wall installation is fixedly secured to a sleeve assembly having a rear surface aligned substantially co-linearly with the rear surface of... | 09/28/1999 |
| 5914453 | Air handler filter monitoring apparatus A monitoring apparatus for alerting an operator to the need to change a temperature control system filter includes a mechanism for selecting and setting a primary period of filter use to assure replacement before the filter becomes clogged; a mechanism fo... | 06/22/1999 |
| 5584312 | Fire damper for ceiling diffuser A protective damper for controlling the flow of fluid through a ceiling diffuser has a frame defining an opening through which the fluid flows. A barrier has a closed position which prevents the flow of fluid through the opening and an open position which... | 12/17/1996 |
| 5567200 | Method and apparatus for circulating air A method and apparatus for circulating air. The apparatus includes a motor for rotating the blades of a fan. The apparatus also includes a housing for the fan having a wall which is disposed proximate to the blades in the fan in a spaced relationship ther... | 10/22/1996 |
| 5393263 | Access door eliminator for curtain fire dampers A mechanism is provided to engage a resettable link in a curtain-type fire damper and release and reset that link so that the blades of the damper can unfold. The mechanism is actuated remotely and mechanically without the need for an access door.... | 02/28/1995 |
| 5310021 | Motor-driven, spring-returned rotary actuator An electric motor acts through a gear train to rotate an output shaft in one direction while a torsion spring rotates the shaft in the opposite direction when the motor is de-energized. When the output shaft stops abruptly at a limit position after being ... | 05/10/1994 |
| 5260691 | Fire alarm device accompanied with air conditioner A combination fire alarm/air conditioner, which can immediately detect a fire. The device includes a temperature-sensor and/or a smoke-sensor installed in the room-side air inlet of the air conditioner. Signals generated by the sensor are received by a mi... | 11/09/1993 |
| 5238220 | Manually and electrically controlled butterfly valve A butterfly valve is utilized to control air flow in the environmental control air distribution system of an aircraft. A linkage system enables the valve to be manually controlled under normal conditions but to be shut off remotely in case of an emergency... | 08/24/1993 |
| 5217407 | Fire damper with auxiliary springs A fire damper comprising a plurality of interconnected blades is provided with a pair of primary negator type springs which are attached to the leading blade and a pair of auxiliary negator type springs which are attached to an intermediate blade. The bla... | 06/08/1993 |
| 5171184 | Tensioned fire damper assembly and method A tensioned fire damper assembly and method are disclosed. The assembly includes a damper tensioning frame for tensionably mounting a fire damper within a duct or other mounting aperture, thereby allowing substantially unrestricted thermal damper expansio... | 12/15/1992 |
| 5154666 | Air exchange system for use in multi-story building An air exchange system is disclosed for use in a building having a plurality of stories each having a base floor, finished floor, finished ceiling and rough ceiling. The system comprises a plurality of main distribution ducts each adapted to be located in... | 10/13/1992 |
| 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 |
| 4867376 | Air control system An air control device, having a panel which opens and closes in response to changes in environmental conditions in a building, preferably is sized to replace a ceiling tile in a conventional drop ceiling. The air control device may be responsive, for exam... | 09/19/1989 |
| 4818970 | Fire condition detection and control system for air moving and filtering units A fire condition detection and control system for use with air moving and filtering units. The system includes one or more remote fire condition detection units, which sense heat or smoke and, upon such sensing, transmit a signal indicative of an alarm co... | 04/04/1989 |
| 4800804 | Variable air flow diffuser An air diffuser adapted for mounting in a building for controlling air pressure within a space, the diffuser comprising a tile such as can be placed in a ceiling and having an air inlet side and an air discharge side, a wall providing an air flow port in ... | 01/31/1989 |
| 4715268 | Ventilator device A ventilator device comprises a casing (2) having one or more openings (3) for passage of ventilation air therethrough, a shutter (7) within the casing and normally held retracted from said one or more openings, first means (15) for urging the shutter to ... | 12/29/1987 |
| 4545566 | Metal seals for damper blades There is disclosed metal seals for damper blades, preferably made of sheet metal, as well as the combination of the blade with the metal seal. The damper blade is pivotably mountable and has longitudinally extending edges which are formed to define a groo... | 10/08/1985 |
| 4397223 | Air distributor with automatically closable damper A reciprocating pneumatic actuator moves the damper of an air diffuser between open and closed positions and is automatically vented to atmosphere if fire or high heat occurs in the vicinity of the diffuser. When the actuator is vented, the return spring ... | 08/09/1983 |
| 4295486 | Low cost, diffuser concealable, volume control, heat responsive, resettable, butterfly damper operator A novel operator is disclosed for use in combination with a butterfly fire and volume control damper, which operator may be concealed behind a standard concentric diffuser. Only a screwdriver aperture need be provided in the diffuser to facilitate the vol... | 10/20/1981 |
| 3960065 | Air control apparatus An air control apparatus is provided comprising a frame housing a plurality of extendable metal curtains spaced from one another in parallel planes, said curtains being extendable between a folded open condition and an unfolded closed condition.... | 06/01/1976 |
