Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1989-03-17
1990-04-24
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
29890124, 137853, 137854, 604247, F16K 1514
Patent
active
049191675
ABSTRACT:
A check valve for providing mono-directional flow in medical devices. The check valve includes a valving means comprised of a valve member and a seat member disposed within a cylindrical channel. The valve member is coaxially aligned within the channel downstream of the seat member and provides a valve cavity into which a portion of the seat member is disposed. The interface between the valve member and the seat member creates a seal length. The valve member is radially stressed by the axial position of the seat member so that the sealing force along the seal length is substantially radial. Fluid flow passes through an axial bore in the valve seat member and upon sufficient pressure unseats the seal length and passes through the annular passageway between the valve member and the seat member.
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Advertisement by Vernay Labs, 1987.
Advertisement by Burron Medical, 1987.
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