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Class Information
Number: 236/49.4
Name: Automatic temperature and humidity regulation > Ventilator type > Pneumatically actuated
Description: Device wherein the means operates the air flow control device by way of air pressure.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8676545 Methods and apparatus to determine air duct system configurations Mar. 18, 2014
8583289 Climate control system for data centers Nov. 12, 2013
8249731 Smart air ventilation system Aug. 21, 2012
8042784 Mounting frame for portable equipment Oct. 25, 2011
7837127 Ventilation system Nov. 23, 2010
7650206 Apparatus and method for environmentally conditioning a space Jan. 19, 2010
7302959 Low-power wireless inflatable bladder damper for forced air heating, ventilation, and air conditioning systems Dec. 4, 2007
7207496 Vent-blocking inflatable bladder for a retrofit HVAC zone control system Apr. 24, 2007
6997390 Retrofit HVAC zone climate control system Feb. 14, 2006
6983889 Forced-air zone climate control system for existing residential houses Jan. 10, 2006
6223993 Climate control device May. 1, 2001
5310111 Pneumatic controller May. 10, 1994
5277397 Bladder assembly for control of fluid flow and method of its fabrication Jan. 11, 1994
5179524 Fan-powered mixing box assembly Jan. 12, 1993
5158230 Air flow control apparatus Oct. 27, 1992
5117899 Air handling apparatus Jun. 2, 1992
5016856 Inflatable bladder for control of fluid flow May. 21, 1991
5011076 Pneumatic temperature control Apr. 30, 1991
4957238 Pneumatic variable air volume controller Sep. 18, 1990
4909308 Changeover valve for a central air conditioning unit Mar. 20, 1990
4848654 Zone control and smoke damping apparatus for central heating and/or cooling systems Jul. 18, 1989
4846399 Fan device Jul. 11, 1989
4832260 Emergency ventilation system May. 23, 1989
4817864 Temperature compensation for vav system Apr. 4, 1989
4817863 Vortex valve flow controller in VAV systems Apr. 4, 1989
4811897 Duct type air conditioning system Mar. 14, 1989
4796803 Air volume regulator valve Jan. 10, 1989
4795090 Air-conditioning installation for vehicles Jan. 3, 1989
4783045 Inflatable bladder for control of fluid flow Nov. 8, 1988
4756474 Duct pressure powered air volume controller Jul. 12, 1988
4694988 Control installation for variable volume air diffusers Sep. 22, 1987
4694989 Control installation for variable volume air diffusers Sep. 22, 1987
4648552 Control installation for variable volume air diffusers Mar. 10, 1987
4643353 Air conditioning control system with enhanced operating range Feb. 17, 1987
4637546 Pneumatic differential pressure controller Jan. 20, 1987
4634047 Thermostatically adjustable pressure regulator Jan. 6, 1987
4627569 Four function pneumatic controller Dec. 9, 1986
4600144 Zone control apparatus for central heating and/or cooling systems Jul. 15, 1986
4556169 On-off thermostat based modulating air flow controller Dec. 3, 1985
4545524 Zone control apparatus for central heating and/or cooling systems Oct. 8, 1985
RE31973 Fluidic flow sensing and control apparatus Aug. 20, 1985
4506830 Device for simultaneous control of air flow and circulation speed for an air conditioning installation with variable air flow Mar. 26, 1985
4500034 Electronic control arrangement for system powered HVAC terminal units Feb. 19, 1985
4467956 System for supplying conditioned air, thermostat therefor and methods of making the same Aug. 28, 1984
4458841 Function control module for air treating systems Jul. 10, 1984
4456168 Modular fluid control apparatus and method of making Jun. 26, 1984
4437608 Variable air volume building ventilation system Mar. 20, 1984
4436245 Pneumatic control system, especially for vehicle heating systems Mar. 13, 1984
4428529 Flow synchronization Jan. 31, 1984
4413776 Reset controller with improved air flow span adjustment Nov. 8, 1983

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