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Class Information
Number: 451/20
Name: Abrading > Precision device or process - or with condition responsive control > With feeding of tool or work holder > Screw actuated > Ratchet and pawl drive > Table dog actuated
Description: Subject matter actuated by reciprocating means which moves back and forth with a carriage.

Patents under this class:

Patent Number Title Of Patent Date Issued
4322917 Double-head automatic grinding machine Apr. 6, 1982
4271637 Surface grinding machine Jun. 9, 1981
3994100 Multi-station grinding machine with pivoted grinding elements Nov. 30, 1976

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