Dual valve assembly
First Claim
1. A dual valve assembly for use in intravenous administration from multiple parenteral fluid sources, said valve assembly controlling flow of fluid in forward and reverse directions therethrough, comprises a valve body having an inlet and an outlet and defining first and second spaced apart valve chambers therein, a first valve member is movable in the first valve chamber between a valve seat and a valve stop, a second valve member is movable in the second valve chamber between spaced opposed valve seats, and means extends between the first valve member and the second valve member to engage the second valve member and move it from one of its seats in response to movement of the first valve member from its seat, whereby flow is enabled from the inlet to the outlet, said second valve member being movable by fluid pressure into closing engagement with the other of its seats in response to flow from the outlet toward the inlet to preclude reverse flow through the assembly.
1 Assignment
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Accused Products
Abstract
A dual valve assembly for intravenous infusions from multiple parenteral fluid sources, the assembly controlling both forward and reverse flow through a flow line includes normally seated first and second valves mounted for movement toward and away from respective valve seats to control flow in a first direction, one of said valves being opened in response to opening movement of the other valve and said one valve including a second seat and movable into closing relationship on its second seat in response to reverse flow to thus prevent reverse flow through the assembly.
55 Citations
10 Claims
- 1. A dual valve assembly for use in intravenous administration from multiple parenteral fluid sources, said valve assembly controlling flow of fluid in forward and reverse directions therethrough, comprises a valve body having an inlet and an outlet and defining first and second spaced apart valve chambers therein, a first valve member is movable in the first valve chamber between a valve seat and a valve stop, a second valve member is movable in the second valve chamber between spaced opposed valve seats, and means extends between the first valve member and the second valve member to engage the second valve member and move it from one of its seats in response to movement of the first valve member from its seat, whereby flow is enabled from the inlet to the outlet, said second valve member being movable by fluid pressure into closing engagement with the other of its seats in response to flow from the outlet toward the inlet to preclude reverse flow through the assembly.
Specification