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| Number | Title | Issue Date |
| 6938631 | Ventilator for covers for boats and other vehicles A ventilator for a covering for a boat or other object includes a dome for covering air venting openings. The air vents are provided in a pair of oppositely disposed ventilator plates. The boat or other covering is firmly clamped between the ventilator plates by mea... | 09/06/2005 |
| 6869354 | Zero cooling air flow overfire air injector and related method A damper box for an orifice air injector, the damper box comprising front and rear faces with respective front and rear openings therein, a pair of sides, a top and a bottom; and a pair of gates pivotally mounted within the damper box and actuatable between open and... | 03/22/2005 |
| 5749780 | Roof vent A roof vent (8) comprises a conduit having an open entry end adapted for being arranged in sealing communication with an aperture in a roof surface, and an exit end spaced from said entry end, shield means (31) adapted for preventing entry of rain into sa... | 05/12/1998 |
| 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 |
| 5080005 | Passive building vents A passive building vent disposed in an outside vertical building wall, communicates between the outside atmospheric air and the confined air within the building, via a housing forming an air mixing chamber with a passageway disposed therethrough. A movabl... | 01/14/1992 |
| 4538508 | Roof ventilator having fluid flow control and method of making same A ventilator device for allowing escape of air from enclosed spaces such as a building includes a unitary housing provided with an insert for controlling the flow of fluid therethrough. The insert comprises a pair of insulative, tubular sleeves between wh... | 09/03/1985 |
| 4266575 | Directional valve A valve housing has a circular cylindrical tubular member and a tubular body having a central portion which is substantially rectangular in cross-section and has mutually opposite, first and second side walls. The first side wall has in cross-section a le... | 05/12/1981 |
| 4152844 | Exhaust system for laundry dryer A portable and removable window exhaust system for home appliances requiring outdoor venting (such as portable laundry dryer) which obviates the necessity of permanent installation and piercing an exterior wall of a building to vent the appliance to the o... | 05/08/1979 |
| 4051769 | Solar powered method and apparatus for venting gaseous material from an enclosed space to atmosphere Apparatus and method for venting moisture from the interior of an enclosed space to atmosphere while restricting the flow of ambient moisture back into the enclosed space. A chamber is provided in fluid communication with the substantially enclosed space.... | 10/04/1977 |
| 3982475 | Double-wall facade element for buildings having an overpressure ventilating or air conditioning installation A double-wall facade element for buildings having an overpressure ventilating or air conditioning installation wherein at the region of a horizontal edge of the element there is provided at its inner wall a throughpassage opening for exhaust air and at th... | 09/28/1976 |
