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Class Information
Number: 433/121
Name: Dentistry > Apparatus > Having motor or means to transmit motion from motor to tool (e.g., "engine") > Hand-held tool or handpiece > Having reciprocating, vibrating, or oscillating output > Impact by sudden release of spring
Description: Apparatus including a resilient member which alternately stores and releases energy from the prime mover or power transmission to drive the tool.

Patents under this class:

Patent Number Title Of Patent Date Issued
7874839 Powered surgical instruments Jan. 25, 2011
6050818 Electrically powered dental cleansing apparatus Apr. 18, 2000
5545038 Percussive dental extractor Aug. 13, 1996
5318445 Process and instrument for dental treatment Jun. 7, 1994
5158457 Dental process and instrument for polishing roots of teeth Oct. 27, 1992
4979899 Scaler for cleaning teeth Dec. 25, 1990
4689011 Dental percussion instrument Aug. 25, 1987
4482324 Percussion instrument Nov. 13, 1984
4341519 Dental angled vibration member Jul. 27, 1982
4316465 Ophthalmic handpiece with pneumatically operated cutter Feb. 23, 1982
4300885 Percussive dental crown extractor Nov. 17, 1981

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