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Class Information
Number: 451/19
Name: Abrading > Precision device or process - or with condition responsive control > With feeding of tool or work holder > Screw actuated > Ratchet and pawl drive > Hydraulically driven
Description: Subject matter actuated by fluid pressure means.

Patents under this class:

Patent Number Title Of Patent Date Issued
6712670 Method and apparatus for applying downward force on wafer during CMP Mar. 30, 2004
6358114 Method and apparatus for optical polishing Mar. 19, 2002
6152804 Grinding method and grinding apparatus Nov. 28, 2000
6001005 Polishing apparatus Dec. 14, 1999
5641321 Elongated cutting tool for wood working and apparatus for and method of grinding the same Jun. 24, 1997
4860500 Passive actuator to maintain a constant normal cutting force during robotic deburring Aug. 29, 1989
4807501 Cutting tool having positioning means Feb. 28, 1989
4173847 Feeding device for a chip removing tool for machining bores in workpieces, especially a honing tool Nov. 13, 1979
4074416 Mirror and method of making same Feb. 21, 1978

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