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Class Information
Number: 451/14
Name: Abrading > Precision device or process - or with condition responsive control > With feeding of tool or work holder > Screw actuated
Description: Subject matter wherein the abrading tool is caused to move with respect to the work holder by a member adapted to turn about an axis, the member having a helical thread adapted to engage a relatively movable second member and force relative displacement of the second member upon rotation of the helically threaded member.

Sub-classes under this class:

Class Number Class Name Patents
451/15 Manually adjustable 13
451/16 Ratchet and pawl drive 6

Patents under this class:
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Patent Number Title Of Patent Date Issued
8616935 Control of overpolishing of multiple substrates on the same platen in chemical mechanical polishing Dec. 31, 2013
8574028 Grinder/polisher Nov. 5, 2013
8550874 Glass-plate working machine Oct. 8, 2013
7950981 Precision machining apparatus and precision machining method May. 31, 2011
7591710 Polishing machine comprising a work chamber and a platform Sep. 22, 2009
7497761 Tool for automatically assembling-disassembling a tire to/from a wheel rim Mar. 3, 2009
7048616 Grinding apparatus for grinding an out-of-round trunnion or tire for a rotary kiln May. 23, 2006
7001248 Fine tilting adjustment mechanism for grinding machine Feb. 21, 2006
7001247 Processing apparatus provided with backpressure sensor Feb. 21, 2006
6949009 Rotating kiln tire refinishing machine Sep. 27, 2005
6893323 Method of and apparatus for removing material May. 17, 2005
6887130 Chemical mechanical polishing apparatus May. 3, 2005
6796885 Pad conditioner coupling and end effector for a chemical mechanical planarization system and method therfor Sep. 28, 2004
6729938 Centerless grinding machine May. 4, 2004
6561871 Linear drive system for chemical mechanical polishing May. 13, 2003
6500047 Semiconductor wafer cutting machine Dec. 31, 2002
6428389 Polishing apparatus Aug. 6, 2002
6416383 Device for dressing a grindstone to polish the running surface structure of a ski Jul. 9, 2002
6280292 Polishing apparatus Aug. 28, 2001
6234871 Method and apparatus for removing a thin coating from a fabric May. 22, 2001
6196896 Chemical mechanical polisher Mar. 6, 2001
6135855 Translation mechanism for a chemical mechanical planarization system and method therefor Oct. 24, 2000
6113474 Constant force truing and dressing apparatus and method Sep. 5, 2000
5951377 Microfinishing machine Sep. 14, 1999
5928061 Wheel-head feed mechanism and grinder using the same Jul. 27, 1999
5827111 Method and apparatus for grinding wafers Oct. 27, 1998
5791971 Glass cutting machine with linear motor Aug. 11, 1998
5785578 Equipment for the grinding of material samples Jul. 28, 1998
5749769 Lapping process using micro-advancement for optimizing flatness of a magnetic head air bearing surface May. 12, 1998
5746644 Centerless grinder assembly and method of operating the same May. 5, 1998
5722876 Electric motor driven type on-line roll grinder, its control method and grinding method Mar. 3, 1998
5718617 Grinding force measurement system for computer controlled grinding operations Feb. 17, 1998
5713784 Apparatus for grinding edges of a glass sheet Feb. 3, 1998
5674106 Centerless grinder assembly and method of operating the same Oct. 7, 1997
5672093 Specimen load control mechanism for automatic polishing apparatus Sep. 30, 1997
5664985 Method and apparatus for texturizing disks Sep. 9, 1997
5630748 Machining method and apparatus May. 20, 1997
5618222 Method and a machine for working a blade sector Apr. 8, 1997
5601473 Skate sharpening apparatus and method Feb. 11, 1997
5558559 Polishing system for opposite edge faces of plated steel strip Sep. 24, 1996
5499942 Hydrostatic nut and lead screw assembly, and method of forming said nut Mar. 19, 1996
5480343 Method of sharpening profile-sharpened cutting blades Jan. 2, 1996
5472367 Machine tool apparatus and linear motion track therefor Dec. 5, 1995
5447463 Apparatus for microfinishing Sep. 5, 1995
5445554 Method for chamfering notch of wafer and apparatus therefor Aug. 29, 1995
5405282 Hydrostatic nut and lead screw assembly, and method of forming said nut Apr. 11, 1995
5367866 Crankpin grinder Nov. 29, 1994
5319885 Machine for multistep finishing of circular saw blades Jun. 14, 1994
5245793 Method and apparatus for fine working or microfinishing Sep. 21, 1993
5210980 Diamond grinding machine for threading and forming hard materials such as ceramics, carbide and glass objects May. 18, 1993

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