Measuring and testing – Volume or rate of flow – By counting drops – bubbles – or particles
Patent
1980-03-10
1982-08-31
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By counting drops, bubbles, or particles
128214E, 128DIG13, G01F 1300, A61M 516
Patent
active
043466060
ABSTRACT:
A rate meter senses successive drops of fluid flowing through a conduit and produces gating periods with time durations corresponding to the period of time between such successive drops. The rate meter then determines the number of incremental time periods in each gating period. The rate meter generates the reciprocal of this determination to obtain an indication of the rate of fluid flow. The rate meter may be self-contained. It includes a housing having a vertically disposed channel constructed to retain the conduit and a horizontally disposed channel communicating with the vertically disposed channel. The horizontally disposed channel is constructed to receive a cross bar made from a resilient material and fixedly disposed on the conduit. The cross bar supports the rate meter in a freestanding relationship. The cross bar may be provided with slots near its ends to enhance its resiliency. The cross bar may also be provided with detents at its ends to cooperate with detents at the ends of the horizontally disposed channel on the rate meter to retain the rate meter on the cross bar. The vertically disposed channel in the rate meter may be defined by first and second oppositely disposed walls in the housing. A light source may be disposed in the first wall and a light sensor may be disposed in the second wall. Visual indicating means may be disposed on a front wall of the housing to provide a numerical indication of the rate of fluid flow.
REFERENCES:
patent: 3390577 (1968-07-01), Phelps et al.
patent: 3545271 (1970-12-01), Amir et al.
patent: 4038982 (1977-08-01), Burke et al.
Cannon Raymond E.
Jenkins Jon A.
Wilson Larry L.
Imed Corporation
Roston Ellsworth R.
Ruehl Charles A.
Schwartz Charles H.
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