Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Reexamination Certificate
2005-10-11
2008-10-07
Lee, Kevin L (Department: 3753)
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
Reexamination Certificate
active
07431046
ABSTRACT:
A pneumatic device for continuously varying the pressure of compressed air for feeding pneumatic actuators, comprising a pressure regulation device, which is adapted to receive in input an unregulated pressure line and to provide in output a regulated pressure; an error amplifier, which is adapted to drive an actuation device, which in turn is adapted to actuate the pressure regulation device; and a pressure transducer, which is adapted to detect a pressure value downstream of the pressure regulation device and to feed it back to the error amplifier, for closed-loop control of the pressure regulation device.
REFERENCES:
patent: 4086804 (1978-05-01), Ruby et al.
patent: 4724865 (1988-02-01), Hirano et al.
patent: 4791954 (1988-12-01), Hasegawa
patent: 6178997 (2001-01-01), Adams et al.
patent: 2002/0117212 (2002-08-01), Vyers et al.
Josif Albert
Lee Kevin L
Modiano & Associati
O'Byrne Daniel J.
Z. Bavelloni S.p.A.
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