Surgery – Respiratory method or device – Ozone or ion generation
Patent
1979-01-22
1981-10-13
Michell, Robert W.
Surgery
Respiratory method or device
Ozone or ion generation
A61M 500
Patent
active
042942462
ABSTRACT:
A metering apparatus for controlling the administration of intravenous fluids (IV) having a flow passage within a housing connectable to a source of IV fluid and to a delivery tube terminating at an administration needle. The flow passageway incorporates a valve seat. A metering pin is axially moveable within the passage and relative to the valve seat. The metering pin defines a flow passageway and a variable area flow notch which are positionable relative to the valve seat to regulate flow from a purge to a flow blocking position. In the preferred embodiment, positioning of the metering pin is accomplished by a cam engaging a portion of the pin forming a cam follower. The cam is manually adjustable by a dial on the device to accomplish accurate, repeatable and continuous flow adjustment over the full range. In other embodiments, the pin may be adjusted relative to the valve seat by a rack and pinion arrangement and other mechanical equivalents.
REFERENCES:
patent: 2980392 (1961-04-01), Greenwood
patent: 3384338 (1968-05-01), Dermody
patent: 3408040 (1968-10-01), Kraft
patent: 3410521 (1968-11-01), Sowers et al.
patent: 3785378 (1974-01-01), Stewart
Aslanian Jerry L.
Numbers Jody L.
Master Medical Corporation
Michell Robert W.
Nelson Gregory J.
Wallen Thomas
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