Bimetal controlled actuator

Automatic temperature and humidity regulation – Motors – Relay


Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0


236 87, G05D 1500, G05D 2300




A pressure transducer is disclosed which produces a variable fluid pressure level in correspondence with the level of a varying electrical signal. The particular application of the pressure transducer disclosed is for a vacuum modulator for producing a variable level vacuum pressure for operating an actuator utilized to position a blend air door in an automatic temperature control system for automotive passenger compartments. The pressure variation is accomplished by controlled communication of either a low pressure or a high pressure source with an interior chamber of the transducer housing, such controlled communication being produced by a pair of heated bimetal actuator devices, each including a bimetal arm which is normally biased to seal the respective inlet port associated with each of the low pressure and high pressure sources. One or the other of the bimetal arms is heated if the pressure level differs from the level corresponding to the electrical signal value by means of a bimetal heater circuit associated with each bimetal arm with the varying electrical signal to be transduced causing activation of the heater current in one or the other respective bimetal heater circuit depending on whether the pressure level is to be increased or decreased, until the pressure level reaches the corresponding level to that of the electrical signal. The electrical signal is disclosed as an error signal in an automatic control system which causes either a vacuum pressure or atmospheric vent port to be placed in communication with the interior chamber of the pressure transducer housing so as to either increase or decrease the vacuum pressure within the enclosure.

patent: 1856586 (1932-05-01), Persons
patent: 1880743 (1932-10-01), Botts
patent: 2122050 (1938-06-01), Stuart
patent: 2350403 (1944-06-01), Kulka
patent: 3286922 (1966-11-01), Franz
patent: 3819146 (1974-06-01), Dobson
patent: 3877638 (1975-04-01), Amano et al.


Say what you really think

Search for the USA inventors and patents. Rate them and share your experience with other people.


Bimetal controlled actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bimetal controlled actuator, we encourage you to share that experience with our community. Your opinion is very important and Bimetal controlled actuator will most certainly appreciate the feedback.

Rate now


Profile ID: LFUS-PAI-O-330825

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.