Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1992-04-14
1992-12-01
Wilson, John J.
Dentistry
Apparatus
Having intra-oral dispensing means
433132, A61C 112
Patent
active
051675013
ABSTRACT:
A typical turbine handpiece comprises a housing accommodating the air-driven rotor, and in the head disclosed, the base of this housing is extended to create an annular seating connected at bottom with the water line of the spray circuit and occupied by a first ring exhibiting an annular cavity connected by way of a lateral orifice to the spray air line. A portion of the ring not occupied by the cavity is shaped so as to fill the annular seating only in part, thereby creating a gap admitting water from the spray circuit; the ring also affords a set of through holes connecting the cavity both with the gap and with a corresponding set of angled outlet holes in the bottom part of the head, from which sprays are directed convergently onto the tip of the bur. The seating and the cavity are enclosed by a second ring inserted from the turbine side to a fluid-tight fit.
REFERENCES:
patent: 3256604 (1966-06-01), Borden
patent: 3451134 (1969-06-01), Erickson et al.
patent: 3783515 (1974-01-01), Auphan et al.
patent: 3952416 (1976-04-01), Lingenhole
patent: 5078601 (1992-01-01), Badoz et al.
Castellini, SPA
Wilson John J.
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