Irrigation and suction handpiece

Details Irrigation and suction handpiece Irrigation and suction handpiece

A - Human Necessities

61

C

83/4

A61C 17/02 (2006.01)

Patent

CA 1142375

IRRIGATION AND SUCTION HANDPIECE ABSTRACT OF THE DISCLOSURE An irrigation-suction handpiece assembly, for dental and surgical use at an operating site, includes a handle containing longitudinally extending, side-by-side suction and irrigant passageways respectively connectible to a source of subatmospheric pressure (i.e., a vacuum source) and an irrigant fluid source. An irrigant valve is actu- able for alternately opening and blocking flow of irri- gant from the irrigant source through the irrigant passageway. An air pressure conduit includes a third passageway in the handle and connectible to an air pres- sure source which is not atmospheric pressure and not influenced by pressure changes in the suction passageway. This air pressure source is either a further subatmo- spheric pressure source or a compressed gas source. The third passageway has a relief opening in the handle selectively openable or closable by the hand of the oper- ator for effecting a change in the pressure within the third passageway. The irrigant valve has a control input coupled with the air pressure conduit and third passage- way and responsive to such change in air pressure therein for shifting between its open and blocking states to thereby control the flow of irrigant fluid to the oper- ating site.

360871

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