Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1978-02-01
1981-03-17
Freeh, William L.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
128214E, 128214F, 417 63, F04B 4906, A61M 500
Patent
active
042564379
ABSTRACT:
A peristaltic infusion pump is disclosed herein and includes a continuous tubular arrangement adapted to pass intravenous fluids therethrough and a peristaltic pump head mounted for rotation about a fixed axis. This pump head includes a plurality of innerconnected, circumferentially spaced tube engaging members adapted to successively engage the tubular arrangement during rotation for peristaltically pumping fluid therethrough. In a preferred embodiment, the pump includes a stepping motor which is energized in a particular way for rotating the pump head and which is also used to sense occlusion in the tubular arrangement. This preferred pump also includes a particular arrangement for detecting the index of refraction of the intravenous fluid for detecting the presence of air bubbles or the like.
REFERENCES:
patent: 3731679 (1973-08-01), Wilhelmson
patent: 3981620 (1976-09-01), Abrahams et al.
patent: 3990444 (1976-11-01), Vial
patent: 4031447 (1977-06-01), Fogo
patent: 4037598 (1977-07-01), Georgl
patent: 4081736 (1978-03-01), Leenhouts
patent: 4107593 (1978-08-01), Anderson
patent: 4114144 (1978-09-01), Hyman
patent: 4147968 (1979-04-01), Goble
patent: 4155362 (1979-05-01), Tess
Freeh William L.
Stewart Naumann Laboratories, Inc.
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