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Class Information
Number: 454/252
Name: Ventilation > Having both inlet and outlet airways > With air pump means > For both inlet and outlet airways
Description: Subject matter wherein the air moving means directly contacts air to force it into the ventilated space and directly contacts air to force it out of the space.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8574047 Air-exchange device for buildings Nov. 5, 2013
8136262 Drier information system Mar. 20, 2012
8128465 Air displacing device Mar. 6, 2012
7837127 Ventilation system Nov. 23, 2010
7591720 Ventilating system Sep. 22, 2009
7575773 Optical compensatory sheet producing method and apparatus, thermal treating method and apparatus, and dust removing method and apparatus Aug. 18, 2009
7572179 Ventilation system Aug. 11, 2009
7565924 Pressure equilizing system Jul. 28, 2009
7563160 Ventilating apparatus Jul. 21, 2009
7497771 Ventilating system Mar. 3, 2009
7338358 Apparatus for air purifying and ventilating Mar. 4, 2008
7080443 Solid surface material fabrication station Jul. 25, 2006
6953395 Ventilation system for underground structure Oct. 11, 2005
6881142 Intelligent networked fan assisted tiles for adaptive thermal management of thermally sensitive rooms Apr. 19, 2005
6843718 Method of guiding external air in a building shell and a building; and a method of temperature control of a building Jan. 18, 2005
6669553 Noise suppression and sound proof chamber Dec. 30, 2003
6482083 Method and device for ventilating a so called clean room Nov. 19, 2002
6241600 Ventilation device Jun. 5, 2001
6071189 Air circulation system and method with return duct ventilation Jun. 6, 2000
6033303 Tertiary dust control process and system for use in the machine room of a papermaking plant Mar. 7, 2000
5791983 Demand ventilation system Aug. 11, 1998
5788571 Method of venting smoke from highrise residential buildings Aug. 4, 1998
5766072 Ventilation arrangement, including filter constructed as sound dampener, flow damper and for filtering purposes Jun. 16, 1998
5702296 Portable ventilation system Dec. 30, 1997
5564980 Room air quality conditioning system Oct. 15, 1996
5460570 Ventilator for elevator cage Oct. 24, 1995
5346426 Method and an apparatus in ventilation Sep. 13, 1994
5326314 Method and system of cleaning industrial air Jul. 5, 1994
5312296 False-ceiling construction and method for the flow of air in connection with a false-ceiling construction May. 17, 1994
5312297 Air flow control equipment in chemical laboratory buildings May. 17, 1994
5205783 Air flow control equipment in chemical laboratory buildings Apr. 27, 1993
5206173 Air hood Apr. 27, 1993
5178581 Smoke evacuation system Jan. 12, 1993
5074894 Apparatus for isolating contagious respiratory hospital patients Dec. 24, 1991
5069113 Stacked and cross-connected recirculating fans in a semiconductor manufacturing cleanroom Dec. 3, 1991
5033360 Air quality control system Jul. 23, 1991
5000079 Noise-attenuating ventilation pedestal for an electronic enclosure Mar. 19, 1991
5000081 Ventilation apparatus Mar. 19, 1991
4986170 Air handling system Jan. 22, 1991
4986469 Method of ventilating an animal enclosure in response to temperature Jan. 22, 1991
4967645 Air shower with directed air flow Nov. 6, 1990
4955285 System for covering the energy requirement of a room Sep. 11, 1990
4942805 Ventilated panel Jul. 24, 1990
4880581 Means and method for aseptic particle-free production of articles Nov. 14, 1989
4877182 Crawl space ventilation system Oct. 31, 1989
4854224 Air cleaning apparatus and construction of clean room with the same Aug. 8, 1989
4846261 Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds Jul. 11, 1989
4836096 Variable air volume air distribution system Jun. 6, 1989
4829882 Crawl space ventilation system May. 16, 1989
4817708 Ventilating unit for drawing and exhausting air Apr. 4, 1989

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