Automatic temperature and humidity regulation – Ventilator type – Pneumatically actuated
Patent
1993-03-19
1994-05-10
Tapolcai, William E.
Automatic temperature and humidity regulation
Ventilator type
Pneumatically actuated
137 85, 236 82, 255 29, F24F 706
Patent
active
053101111
ABSTRACT:
A pneumatic controller configured to regulate the opening and closing of a controlled device in response to a measured variable, such as temperature. The pneumatic controller includes a sensor providing an output proportional to the measured variable as well as a gas supply inlet and a gas outlet. A pneumatic relay is disposed between the inlet and the outlet for regulating the pressure of gas passing through the inlet to the outlet to the controlled device. A pneumatic actuator system is connected to the relay and regulates the relay via cooperation between an inflatable bladder and a pneumatic pilot circuit in the relay. The pneumatic actuator system includes a first electric microvalve which selectively permits passage of a gas into the inflatable bladder and a second electric microvalve which selectively permits passage of a gas out of the inflatable bladder in response to a digital controller connected to the sensor.
REFERENCES:
patent: 2490420 (1949-12-01), Davis
patent: 3300174 (1967-01-01), Urban et al.
patent: 3602241 (1971-08-01), Puster
patent: 3809314 (1974-05-01), Eugelke et al.
patent: 3810578 (1974-05-01), Matthews
patent: 4042173 (1977-08-01), Boyer et al.
patent: 5114070 (1992-05-01), Lilya et al.
patent: 5158230 (1992-10-01), Curran
Johnson Service Company
Tapolcai William E.
LandOfFree
Pneumatic controller does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pneumatic controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic controller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2409679