Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1981-02-23
1982-07-20
Mancene, Gene
Dentistry
Apparatus
Having intra-oral dispensing means
239318, A61C 112
Patent
active
043403662
ABSTRACT:
A dental handpiece having an improved water/air spray system including a pair of substantially parallel tubes, one for water and the other for chip air, extending through the handle of the handpiece and terminating in a nozzle chamber having a discharge orifice. The tubes are generally cylindrical but are partially deformed at their distal ends, such deformation constituting a flattening of adjacent wall portions of the respective tubes. Such adjacent wall portions are disposed in contiguous relation and are cut away for a limited distance at the discharge end of the tube assembly to define the unitary nozzle chamber. The wall of the chamber is provided with a water-deflecting surface aligned with the water passage and sloping inwardly and distally toward the orifice to deflect water from the water passage into the path of air discharged from the chip air passage immediately prior to the discharge of said water/air spray from the nozzle chamber.
REFERENCES:
patent: 1039728 (1912-10-01), Gilmore
patent: 2855672 (1981-10-01), Franwick et al.
patent: 3175293 (1965-03-01), Borden
patent: 3256604 (1966-06-01), Borden
patent: 3716194 (1973-02-01), Miller
patent: 3952416 (1976-04-01), Lingenhole
American Hospital Supply Corporation
Mancene Gene
Wilson John J.
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