Fluid handling – Flow affected by fluid contact – energy field or coanda effect – System comprising plural fluidic devices or stages
Reexamination Certificate
2005-08-23
2005-08-23
Sirmons, Kevin C. (Department: 3763)
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
System comprising plural fluidic devices or stages
C604S067000
Reexamination Certificate
active
06932114
ABSTRACT:
A fluid delivery system capable of delivering a precise amount of fluid and monitor certain properties of the fluid so that the correct fluid is safely delivered to its intended destination. The system makes use of a flow sensor comprising a freestanding tube portion vibrated at a resonant frequency, wherein the resonant frequency corresponds to the density of the fluid flowing through the tube portion and the tube portion exhibits a degree of twist that varies with the mass flow rate of the fluid flowing therethrough. Movement of the tube portion is then sensed to produce a first output signal corresponding to the fluid density and a second output signal corresponding to the mass flow rate. The system is also equipped to measure elapsed time and to stop fluid flow in response to either of the first and second output signals.
REFERENCES:
patent: 3910256 (1975-10-01), Clark et al.
patent: 4447224 (1984-05-01), DeCant et al.
patent: 6477901 (2002-11-01), Tadigadapa et al.
Hartman & Hartman PC
Hartmman Gary M.
Integrated Sensing Systems, Inc.
Sirmons Kevin C.
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