Dentistry – Apparatus – Having motor or means to transmit motion from motor to tool
Patent
1994-07-28
1996-01-16
Lucchesi, Nicholas D.
Dentistry
Apparatus
Having motor or means to transmit motion from motor to tool
433166, A61C 306
Patent
active
054842840
ABSTRACT:
A prophylaxis cup is provided to be used with a dental prophylaxis angle. The cup includes an elastomeric body having an upper section and a lower section and a threaded shaft extending axially from the lower section. The shaft has a head embedded in the body's lower section. The lower section has a deformable annular ring concentric with, and adjacent to, the shaft head. The ring is deformable outwardly into an adjacent annular groove radially outboard of the ring. A peripheral slinger or skirt outboard of the groove extends downwardly and away from the groove. The cup's body upper section defines a pocket which receives cleaning abrasives. When the cup's shaft is threaded into a rotatable driven gear on the dental prophylaxis angle, a stationary edge of a hollow cap stem on the angle engages the cup's ring, to form a rotational ring seal. The structure of the cup ensures that the seal is maintained even when the cup is bent or deformed during use.
REFERENCES:
patent: 1837938 (1931-12-01), Young
patent: 2451918 (1948-10-01), Chott
patent: 3407502 (1968-10-01), Richmond
patent: 3436830 (1969-04-01), Richmond
patent: 3478433 (1969-11-01), Richmond
patent: 3789462 (1974-02-01), Reich
patent: 4253832 (1981-03-01), Bailey
patent: 4292027 (1981-09-01), Richmond
patent: 4365956 (1982-12-01), Bailey
patent: 5178538 (1993-01-01), Eckert
Lucchesi Nicholas D.
Young Dental Manufacturing Company, Inc.
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