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Class Information
Number: 451/16
Name: Abrading > Precision device or process - or with condition responsive control > With feeding of tool or work holder > Screw actuated > Ratchet and pawl drive
Description: Subject matter including use of a circular toothed wheel (i.e., ratchet wheel) which is held in position or propelled by a feather (i.e., pawl), which wheel serves to turn the screw.

Sub-classes under this class:

Class Number Class Name Patents
451/18 Cam actuated 3
451/19 Hydraulically driven 9
451/17 Sizing gauge controlled 10
451/20 Table dog actuated 3

Patents under this class:

Patent Number Title Of Patent Date Issued
8550876 Force-controlled surface finishing through the use of a passive magnetic constant-force device Oct. 8, 2013
8414789 Method and composition for chemical mechanical planarization of a metal Apr. 9, 2013
7246424 Magnetic devices having magnetic features with CMP stop layers Jul. 24, 2007
4680896 Tool unloading mechanism for automatic tool grinding machine Jul. 21, 1987
4628642 Device for sharpening circular knives Dec. 16, 1986
4213277 Method for dressing a grinding wheel Jul. 22, 1980

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