Syringe pumping system with valves

Details Syringe pumping system with valves Syringe pumping system with valves

1978-09-06

1980-07-01

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

137843, 137854, 128273, 128274, F16K 1514

Patent

active

042101735

ABSTRACT:
A pumping system with inlet and outlet check valves for delivering measured doses of liquid from a reservoir container, which might include sterile normal saline solution, to a series of smaller vials or hypodermic syringes. This pumping system has an improved valve system that includes a heavily biased check valve and a lightly biased check valve. An embodiment of the system has a valve body with an inlet passage surrounded by a valve seat, and an outlet valve member is biased against this valve seat by a pressure that is substantially greater than a pressure biasing an inlet check valve against its valve seat. A heavy bias at only one valve both (1) prevents valve leakage from the system due to a liquid pressure head from the reservoir container and (2) reduces operator fatigue.

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patent: 4051852 (1977-10-01), Villari
patent: 4084606 (1978-04-01), Mittleman

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