Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1984-03-27
1986-10-07
Truluck, Dalton L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604323, 604325, 604251, A61M 500
Patent
active
046156933
ABSTRACT:
A drip chamber apparatus wherein the base of the drip chamber includes an apertured disk with a series of concentric stepped recesses against which is positioned a valve diaphragm. There is provided a pre-biasing member which applies pressure to the valve diaphragm to maintain the valve seated in a closed position. The pre-biasing member is axially adjustable to vary the pre-biasing pressure.
REFERENCES:
patent: 2999499 (1958-06-01), Willet
patent: 3021841 (1962-02-01), Burke
patent: 3311268 (1964-11-01), Fields
patent: 3620500 (1970-02-01), Santomieri
patent: 3796245 (1974-03-01), Wildensteiner
patent: 3807445 (1974-04-01), McPhee
patent: 4158362 (1979-06-01), Durrett et al.
patent: 4395260 (1983-07-01), Todd et al.
Paradis Joseph R.
Zurlo Eugene J.
Kaechele Karen L.
Kersey George E.
Nypro Inc.
Truluck Dalton L.
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