Aspiration control system
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United States of America Patent
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Jul 4, 1995
Issued Date -
N/A
app pub date -
Aug 11, 1993
filing date -
Feb 12, 1992
priority date (Note) -
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Abstract
An aspiration control system includes a proportional control valve and a motor, for driving a vacuum pump, which are controlled by a system controller in accordance with input commands to provide a precise, continuously variable vacuum or negative pressure within a vacuum chamber and surgical handpiece. A pressure transducer samples the vacuum output and produces a signal which is fed to the system controller. The signal is compared with an input command, and the motor speed and valve orifice size are coordinated to control the vacuum level.
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