Dentistry – Apparatus – Having suction orifice
Patent
1997-10-30
1999-01-05
Wilson, John J.
Dentistry
Apparatus
Having suction orifice
604247, A61C 1706
Patent
active
058554785
ABSTRACT:
A unidirectional valve (46) is used for preventing a back flow (52) of fluid matter (72) in a dental saliva ejector (20). The unidirectional valve (46) includes a valve body (74) and a valve diaphragm (76). The valve diaphragm (76) is coupled to a base (78) of the valve body (74). The base (78) has apertures (90) for separating a particulate component (104) from a liquid component (102) of fluid matter (72). The valve diaphragm (76) has a flexible flap (96) for allowing a forward flow (48) of liquid component (102) into a low volume suction tube (28) of saliva ejector (20). The flexible flap (96) is further configured to prevent the back flow (52) liquid component (102) into an ejector tip (26) and into the mouth (22) of a dental patient (24).
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Gresham Lowell W.
Meschkow Jordan M.
Wilson John J.
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