In-line valve for administering parenteral liquids

Details In-line valve for administering parenteral liquids In-line valve for administering parenteral liquids

1982-09-23

1984-09-18

Rosenthal, Arnold

Valves and valve actuation

With selective flow regulation

251212, 251326, 251327, 251DIG5, 251115, 604 33, 604249, F16K 3502, F16K 332

Patent

active

044719426

ABSTRACT:
An intravenous flow control valve includes in-line valving mechanism wherein flow through the valve at low flow settings increases slowly with displacement of a valve controller disc. The disc, which is free to rotate with respect to an axis but is longitudinally fixed, includes a threaded stem which engages a threaded bore and a sluice gate member. The gate member is permitted to move only longitudinally in a valve control chamber in response to disc rotation and includes a control passage defined therethrough which tapers in the direction of gate member motion so as to graduate the cross-sectional area of the passage exposed to flow as the disc rotates. A locking arrangement permits the disc to be positionally locked to avoid inadvertent change of the valve setting. The disc and stem provide an hermetic seal for the valve control chamber to avoid contamination of the intravenous fluid being controlled.

REFERENCES:
patent: 1176100 (1916-03-01), Ronk
patent: 1770717 (1930-07-01), Stremberger
patent: 1805106 (1931-05-01), Robinson
patent: 1847011 (1932-02-01), Kratzer
patent: 1892260 (1932-12-01), Wick
patent: 2112913 (1938-04-01), Lechene
patent: 2596817 (1952-05-01), McGovney
patent: 3212753 (1965-10-01), Milette
patent: 3305207 (1967-02-01), Calderoni et al.
patent: 3938779 (1976-02-01), Benjamin
patent: 4161307 (1979-07-01), Clinch et al.
patent: 4230300 (1980-10-01), Wiltse
patent: 4332369 (1982-06-01), Gordon et al.

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