Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1989-04-07
1991-02-19
Koczo, Michael
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
417 63, 5453, F04B 4908
Patent
active
049939203
ABSTRACT:
In combination with an air mattress, the pressure within which is to be controlled, a first switch for actuation at a first air pressure and a second switch for actuation at a second air pressure higher than the first. The difference between the first and second air pressures defines a zone within which the air pressure in the mattress is not controlled. The first and second switches have air inlets. A source of compressed air has an outlet. An electrically actuated air valve has an air inlet and an air outlet. The first and second switches are coupled across a source of electrical power for controlling the supply of compressed air from the compressed air source to the mattress and exhausting compressed air from the mattress, respectively.
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Blom Eric D.
Harkleroad Barry A.
Koczo Michael
Scheuermann David W.
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