Dentistry – Apparatus – Hand manipulatable implement
Patent
1989-09-14
1991-07-09
Wilson, John J.
Dentistry
Apparatus
Hand manipulatable implement
433141, 433144, A61C 1700
Patent
active
050300911
ABSTRACT:
A dental curet and sharpening machine system has been developed for complete mechanical guidance of the instruments during the sharpening procedure. Double-ended dental curets comprising cutting blades, shanks, and a handle have been designed so that regardless of the instrument's rake angle, the arc center of the toe on the face of the cutting blade which is to be sharpened lies on the longitudinal center axis of the instrument and at a constant distance from reference points on the instrument handle. The sharpening machine comprises a base, an electrical motor with a rotating sharpening stone, and an instrument guide unit. The instrument guide unit can position the blade face of a curet of any rake angle in a horizontal plane with the arc center of the toe on the blade's face coincident with a vertical axis about which the guide unit is swung while the blade edge is engaged with the rotating stone during the cutting procedure. The invention comprises three aspects: (1) the curets; (2) the sharpening machine; and (3) the method of sharpening the curets.
REFERENCES:
patent: 1138355 (1915-05-01), Carr
patent: 1605320 (1926-11-01), Bates
patent: 2366671 (1945-01-01), Montelius
patent: 3251150 (1966-05-01), Sedgwick et al.
patent: 4720907 (1988-01-01), Rapp
Nordent Catalog No. 103, pp. 16-17, 1982.
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