Coupler with check valve for a dental ejector hose
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United States of America Patent
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Mar 10, 1998
Grant Date -
N/A
app pub date -
Mar 18, 1996
filing date -
Mar 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A coupler is adapted for inserted engagement with a dental ejector valve and serves to couple a vacuum hose to the valve. A passageway in the coupler is closed by a flexible disk which flexes open in response to a vacuum inducted ejector system flow from a source. The disk is confined in place across the passageway by a retainer which biases the disk into engagement with a valve seat surface. The flexible disk blocks any reverse flow through the coupler as when a reduced pressure occurs from interaction of the patient's mouth with a saliva ejector.
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