Valves and valve actuation – With selective flow regulation – Different sized bores in valve head
Patent
1975-04-30
1976-04-13
Rosenthal, Arnold
Valves and valve actuation
With selective flow regulation
Different sized bores in valve head
251208, F16K 334
Patent
active
039499669
ABSTRACT:
There is disclosed a fluid flow control valve that provides a plurality of selectable, constant flow rates and that is ideally suited for use with oxygen breathing devices to supply a flow of oxygen to persons in respiratory distress. The valve is simple in construction and designed for minimum size and bulk while insuring accuracy of flow rates. The valve is provided with positive detent indication of the preselected fluid flow rate and can be used in any position on a supporting surface or on the regulator valve of the oxygen supply system. The valve comprises a valve body having a central cavity with a carriage plate received and rotatably supported therein. A first external port communicates with a fluid passageway that extends internally of the body and communicates with a pair of internal ports which are open to the cavity at spaced-apart locations. The carriage plate carries a plurality of orifice members which are of preselected, different orifice sizes and which extend through the carriage plate. The orifice members are positioned at preselected angular orientations relative to the internal ports of the body whereby rotation of the carriage plate moves one of the orifice members into registration with alternate internal ports. The body also has a second external port which is open to the carriage plate thereby establishing fluid communication through said body via an orifice member that is in registration with one of the internal ports of the body. The body also bears a spring-biased detent which is operative to register with one of a plurality of detent receptacles carried on the selector dial of the valve when one of the orifice members is in registration with one of the internal ports. Calibration marks are provided externally of the body with a cooperative index mark carried on the selector dial to provide a visual indication of the preselected flow rate through the valve.
REFERENCES:
patent: 2361655 (1944-10-01), Robinson
patent: 3677516 (1972-07-01), Hicks
Robertshaw Controls Company
Rosenthal Arnold
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