Resources Contact Us Home
Browse by Category: Main > Health & Medicine
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

  Recently Added Patents
Engineered nucleic acids encoding a modified erythropoietin and their expression
Spin transition material
Method of modified facies proportions upon history matching of a geological model
Contact detection between a disk and magnetic head
Quinoid thiophene organic photoelectric material, preparation method thereof and application thereof
Device to facilitate moving an electrical cable of an electric vehicle charging station and method of providing the same
Electronic multiparty accounts receivable and accounts payable system
  Randomly Featured Patents
Apparatus and method for capturing and viewing images
Grinding machine for ophthalmic glasses
Nonvolatile semiconductor memory device with advanced multi-page program operation
Method and apparatus providing selective flow redistribution across Multi Link Trunk/Link Aggregation Group (MLT/LAG) after port member failure and recovery
Antibiotics sisomicin and verdamicin I and complex containing same
Inter-cylinder air-fuel ratio imbalance determination apparatus for internal combustion engine
Semiconductor flash memory device and method of fabricating the same
Molecular detection using an optical waveguide fixed to a cantilever
Rate control for packet-based wireless communication
Method and apparatus for removing bulk material from a container