초록 ▼

An indicator/controller for dispensing medical fluids (e.g., intravenously) is disclosed. The device has vented chambers that are movable vertically with respect to one another, thin-plate orifices, capillary chambers, and membrane valves, in addition to other features. The device need be set only o

An indicator/controller for dispensing medical fluids (e.g., intravenously) is disclosed. The device has vented chambers that are movable vertically with respect to one another, thin-plate orifices, capillary chambers, and membrane valves, in addition to other features. The device need be set only once to the desired flow and it will maintain that flow rate regardless of changes in temperature or the height of fluid in the supply.

대표청구항 ▼

A liquid flow rate indicating/controlling device comprising: (a) a first chamber vented to the atmosphere and having a liquid inlet in fluid communication with a liquid supply, a liquid outlet, and means to maintain the height of liquid in the chamber essentially constant; (b) a second chamber vente

A liquid flow rate indicating/controlling device comprising: (a) a first chamber vented to the atmosphere and having a liquid inlet in fluid communication with a liquid supply, a liquid outlet, and means to maintain the height of liquid in the chamber essentially constant; (b) a second chamber vented to the atmosphere, in fluid communication with the liquid outlet of the first chamber for receiving liquid therefrom, and having a thin-wall orifice plate at a predetermined point, said plate having an orifice through which liquid received from the first chamber passes out of the second chamber, the height of liquid in the second chamber above the orifice indicating the flow rate through the orifice; and (c) means for setting the pressure on the liquid received from the first chamber just before the liquid passes through the orifice.