Unidirectional valve for preventing back flow in a dental saliva

Details Unidirectional valve for preventing back flow in a dental saliva Unidirectional valve for preventing back flow in a dental saliva

1998-06-11

1999-08-24

Lucchesi, Nicholas D.

Dentistry

Apparatus

Having suction orifice

A61C 1706

Patent

active

059417030

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).

REFERENCES:
patent: 4904236 (1990-02-01), Redmond et al.
patent: 5076787 (1991-12-01), Overmyer
patent: 5464397 (1995-11-01), Dowers, Jr.
patent: 5725374 (1998-03-01), Young

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