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Class Information
Number: 451/262
Name: Abrading > Machine > Rotary tool > Rotary disk > Opposed abrading tools
Description: Abrading machine having a plurality of abrading tools located on opposite or different sides of the workpiece which simultaneously or successively treat such opposite or different sides thereof.

Sub-classes under this class:

Class Number Class Name Patents
451/263 Blade reversing 4
451/264 Reciprocating work holder 12
451/267 Work guide 42
451/268 Work rotating 64

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8690640 Complex geographical edge polishing Apr. 8, 2014
8647174 Semiconductor wafer polishing method and polishing pad shaping jig Feb. 11, 2014
8613643 Work feeder for roller end face working machine, roller end face working machine and rollers for roller bearing Dec. 24, 2013
8562390 Double-disc grinding apparatus and method for producing wafer Oct. 22, 2013
8512103 Cutting tool sharpener Aug. 20, 2013
8485864 Double-side polishing apparatus and method for polishing both sides of wafer Jul. 16, 2013
8475229 Method and grinding machine for the complete grinding of short and/or rod-shaped workpieces Jul. 2, 2013
8454410 Polishing apparatus Jun. 4, 2013
8414360 Double side polishing apparatus and carrier therefor Apr. 9, 2013
8376810 Method for chemically grinding a semiconductor wafer on both sides Feb. 19, 2013
8323074 Brake disk braking surface processing device Dec. 4, 2012
8317571 Grinding assembly for glass slabs and grinding head for a rectilinear grinding machine equipped with such assembly Nov. 27, 2012
8231434 Grinding machine, particularly a high-speed grinding machine Jul. 31, 2012
8221194 Method of grinding bar-shaped workpieces, grinding machine for carrying out the method, and grinding cell in twin arrangement Jul. 17, 2012
8221198 Polishing apparatus for polishing a work having two surfaces Jul. 17, 2012
8172649 Floor edger and grinder device May. 8, 2012
8145342 Methods and systems for adjusting operation of a wafer grinder using feedback from warp data Mar. 27, 2012
8092277 Method of grinding semiconductor wafers, grinding surface plate, and grinding device Jan. 10, 2012
8066553 Wafer clamping device for a double side grinder Nov. 29, 2011
8025554 Method of polishing work Sep. 27, 2011
8002610 Double side polishing method and apparatus Aug. 23, 2011
7930058 Nanotopography control and optimization using feedback from warp data Apr. 19, 2011
7867059 Semiconductor wafer, apparatus and process for producing the semiconductor wafer Jan. 11, 2011
7854650 Knife sharpener Dec. 21, 2010
7775858 Machine for dressing the edges and outer surfaces of flat workpieces Aug. 17, 2010
7727053 Double-side polishing method for wafer Jun. 1, 2010
7722443 Knife blade dressing apparatus May. 25, 2010
7648409 Double side polishing method and apparatus Jan. 19, 2010
7614934 Double-side polishing apparatus Nov. 10, 2009
7485029 Double face polishing apparatus Feb. 3, 2009
7435158 Initial position setting method of grinding wheel in vertical double disc surface grinding machine Oct. 14, 2008
7399217 Lapping machine Jul. 15, 2008
7367867 Two-side working machine May. 6, 2008
7347770 Two-sided surface grinding apparatus Mar. 25, 2008
7270592 Milling machine Sep. 18, 2007
7226338 Milling machine Jun. 5, 2007
7179155 Device for grinding liquid crystal display panel Feb. 20, 2007
7150674 Both-side grinding method and both-side grinding machine for thin disc work Dec. 19, 2006
7147541 Thickness control method and double side polisher Dec. 12, 2006
7137867 Thickness control method and double side polisher Nov. 21, 2006
7134936 Grinding head for a grinding machine for glass slabs, and machine equipped with such head Nov. 14, 2006
7125313 Apparatus and method for abrading a workpiece Oct. 24, 2006
7083502 Method for simultaneous two-disk texturing Aug. 1, 2006
7052372 Chemical-mechanical polisher hardware design May. 30, 2006
7029380 Double-side polishing method and apparatus Apr. 18, 2006
7029366 Method and apparatus for abrasive circular machining Apr. 18, 2006
7021990 Method and apparatus for circular grinding Apr. 4, 2006
7022001 Polishing apparatus Apr. 4, 2006
7008310 Wafer carrier wear indicator Mar. 7, 2006
6984167 Polishing agent and lapping method Jan. 10, 2006

1 2 3

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