Infusion set
First Claim
1. An infusion set having a container for liquid medicine, which is connected to a drip chamber by a feed-line and a differential pressure valve, the dip chamber connected by a further feed-line to a front end with a roller clamp, and a syringe connected to a differential pressure valve, characterized in that the differential pressure valve having a housing, a diaphragm disk retained about the perimeter thereof by the housing, a first inlet associated with an outlet annular ridge and in fluid communication with the diaphragm disk, and a second inlet in fluid communication with the diaphragm and the outlet annular ridge and the first inlet annular ridge, wherein the differential pressure valve is configured as a 3-way check valve by the first inlet being connected to the container for the liquid medicine and the second inlet being configured for the connection to the syringe whereby under normal valve operation is not sealingly engaging the first inlet annular ridge and the outlet annular ridge such that the first inlet is in fluid communication with the outlet, and when pressure is created by the syringe between the first inlet annular ridge and the outlet annular ridge the diaphragm sealingly engages in the first inlet annular ridge, and when negative pressure is created by the syringe between the first inlet annular ridge and the outer annular ridge the diaphragm sealingly engages the outlet annular ridge.
3 Assignments
0 Petitions
Accused Products
Abstract
In an infusion set having a container for fluid medicines, which by a feed-line and a differential pressure valve is connected to a drip chamber and which by a further feed-line is connected to a front end controlled with a roller clamp according to U.S. patent application Ser. No. 08/800,779, the differential pressure valve has two inlets each with an associated differential force chamber and the two differential force chambers are sealingly separated from each other by a diaphragm disk, wherein both differential force chambers are connected to an exit line for the fluid medicine. To use the differential pressure valve, the valve is configured as a 3-way check valve by the fact that the first inlet is connected to the container for the fluid medicine and that the second inlet is designed for the connection to a syringe or the like.
72 Citations
20 Claims
- 1. An infusion set having a container for liquid medicine, which is connected to a drip chamber by a feed-line and a differential pressure valve, the dip chamber connected by a further feed-line to a front end with a roller clamp, and a syringe connected to a differential pressure valve, characterized in that the differential pressure valve having a housing, a diaphragm disk retained about the perimeter thereof by the housing, a first inlet associated with an outlet annular ridge and in fluid communication with the diaphragm disk, and a second inlet in fluid communication with the diaphragm and the outlet annular ridge and the first inlet annular ridge, wherein the differential pressure valve is configured as a 3-way check valve by the first inlet being connected to the container for the liquid medicine and the second inlet being configured for the connection to the syringe whereby under normal valve operation is not sealingly engaging the first inlet annular ridge and the outlet annular ridge such that the first inlet is in fluid communication with the outlet, and when pressure is created by the syringe between the first inlet annular ridge and the outlet annular ridge the diaphragm sealingly engages in the first inlet annular ridge, and when negative pressure is created by the syringe between the first inlet annular ridge and the outer annular ridge the diaphragm sealingly engages the outlet annular ridge.
- 13. A three way check valve adapted for connection to a container for liquid medicine, a syringe, and an outlet line, comprising a housing, a diaphragm disk retained about the perimeter thereof by the housing, a first inlet associated with a first inlet annular ridge and in fluid communication with the container for liquid medicine and the diaphragm disk, an outlet associated with an outlet annular ridge and in fluid communication with the outlet line and the diaphragm disk, and a second inlet in fluid communication with the syringe and the diaphragm and the outlet annular ridge and the first inlet annular ridge, whereby under normal valve operation the diaphragm is not sealingly engaging the first inlet annular ridge and the outlet annular ridge such that the first inlet is in fluid communication with the outlet, and when pressure is created by the syringe at the second inlet and between the first inlet annular ridge and the outlet annular ridge, the diaphragm sealingly engages the first inlet annular ridge, and when negative pressure is created by the syringe between the first inlet annular ridge and the outlet annular ridge the diaphragm sealingly engages the outlet annular ridge.
Specification