Insufflator digital gas flow system
AssigneeNorthgate Technologies Inc.
InventorsRobert R. Mantell, Albert Nowesielski, Charles Zander
Life of this patent
Estimating the term…
Abstract
A pressure controlling system for an insufflator includes a plurality of parallel connected, solenoid controlled valves. Each valve has in series therewith a gas flow limiter with the limiters arranged in digital succession. The valves are in parallel with one another and in series with the gas flow line so that solenoid opening of one or more of the valves controls gas flow in an on-off fashion with gas flow continuing through the respective flow limiting means to determine total flow rate in a digital manner.
Claims10
A digital flow controlling system for an insufflator comprising means for connection to a source of pressurized insufflating gas, input flow means connected to said connection means in gas flow relation therewith, a plurality of gas flow control means of differing flow capacities in digital capacity relation to one another, the first of said plurality of gas flow control means having a fixed rate of flow of one unit of gas, and each succeeding one of said gas flow control means having a fixed rate of flow which is twice the unit flow rate of the preceding gas flow control means, each having an input end and an output end and each including an on-off valve, means connecting the input ends of said plurality of said gas flow control means in continuously open gas flow relation in parallel with one another
- to said input flow means, output gas flow means, means connecting the output ends of said gas flow control means in continuously open gas flow relation in parallel with one another to said output gas flow means, and means for selectively opening and closing said on-off valves singly and in combination to provide digitally differing rates of gas flow to said output gas flow means.
Dependencies are inferred from the claim text.