초록 ▼

A second improvement involves the use of a pneumatic pressure transducer to monitor pneumatic pressure being supplied to the pneumatic system in order to recognize non-hazardous transient drops in air pressure which can occur under certain normal operating conditions. A third improvement relates to

A second improvement involves the use of a pneumatic pressure transducer to monitor pneumatic pressure being supplied to the pneumatic system in order to recognize non-hazardous transient drops in air pressure which can occur under certain normal operating conditions. A third improvement relates to the use of an intraocular pressure accumulator downstream from a final solenoid-operated pinch valve, which reduces fluctuations in air pressure and has other advantages.

대표청구항 ▼

[ We claim:] [1.] In an intraocular pressure control system of the type powered by a source of compressed gas and including at least one pressure regulator means for limiting gas pressure to a predetermined maximum value, first and second electromagnetically-actuated valve means located downstream o

[ We claim:] [1.] In an intraocular pressure control system of the type powered by a source of compressed gas and including at least one pressure regulator means for limiting gas pressure to a predetermined maximum value, first and second electromagnetically-actuated valve means located downstream of the pressure regulator means, and transducer means for monitoring actual pressure obtained at a location downstream from the first valve means, the first valve means being for controlling flow of the compressed gas from the pressure regulator means to a location where such gas is put to use and the second valve means being for controlling flow of the compressed gas from the location to atmosphere, an improved method of operating the first and second valve means to achieve a desired pressure level below the predetermined maximum valve, comprising the steps of:(a) opening the first valve means to supply air pressure at a first predetermined rate to increase air pressure at the location toward the desired pressure level;(b) monitoring the actual pressure achieved at the location;(c) when the actual pressure comes within a predetermined distance from the desired pressure level, opening the second valve means to dampen the rate of increase of actual pressure, reby helping ensure that the actual level of gas pressure at the location reaches the desired pressure level without overshoot.