Resources Contact Us Home
Browse by Category: Main > Tools & Hardware
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

  Recently Added Patents
Imidazole-5-carboxylic acid derivatives, the preparation method therefor and the uses thereof
Produce container and lid assembly
Apparatus and method for controlling a tunable matching network in a wireless network
High purity diphenyl sulfone, preparation and use thereof for the preparation of a poly(aryletherketone)
Nonvolatile semiconductor storage device and a manufacturing method thereof
Method and system for an integrated host PCI I/O bridge and dual port gigabit ethernet controller
  Randomly Featured Patents
Video display
Spa cover lifter
Pipe cleaning method and apparatus
Electronic calculator having the functions of telephone book, address book, calendar, schedule book and memo book
Motor vehicle electrical system providing multiple DC voltages
Cleaning fluid reservoir
Method and apparatus for providing repeatable wireline depth measurements
Rotating universal serial bus hub
Concurrent friction/joule heating weld process
Process for the removal of inorganic salts