Shutoff valve mechanism for the oral evacuator of a dental unit
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United States of America Patent
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-
Dec 7, 1993
Grant Date -
N/A
app pub date -
Nov 6, 1992
filing date -
Nov 8, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concept is a shutoff valve mechanism (40) for use in conjunction with the oral evacuator of a dental unit, said mechanism being connectable to a suction tube (14) communicating with a vacuum pump. The shutoff valve mechanism (40) comprises a valve (42, 48) by means of which an air flow (S) induced by the vacuum applied to the suction tube (14) can be switched on to effect via an evacuator tip (30) attached to the shutoff valve mechanism (40), whereby the evacuator tip can be employed for evacuating liquids and solid particles (SP) from the patient's mouth. The shutoff valve mechanism (40) further comprises non-moving elements (41, 42, 43, 44, 45, 46) permanently attached to the suction tube (14) and elements (49, 50, 51, 52, 53, 54, 55) adapted movable relative to said non-moving elements, both sets of elements incorporating a flow channel (41a, 42a, 43a, 53a).
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Family
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