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Class Information
Number: 451/334
Name: Abrading > Work feeder > Reciprocating
Description: Work feeder in which the work conveying means moves the work to effect grinding and cyclically returns with the work generally along the path of the grinding stroke to the starting point.










Sub-classes under this class:

Class Number Class Name Patents
451/335 With hopper or magazine 27


Patents under this class:

Patent Number Title Of Patent Date Issued
8475233 Device for grinding spinning cots Jul. 2, 2013
8118640 Wafer transferring apparatus, polishing apparatus, and wafer receiving method Feb. 21, 2012
7056189 Grinding method of a workpiece and grinding apparatus Jun. 6, 2006
6641467 Power tool Nov. 4, 2003
6458015 Chemical-mechanical planarization machine and method for uniformly planarizing semiconductor wafers Oct. 1, 2002
6375556 Grinding apparatus for grinding workpieces Apr. 23, 2002
6155908 Work-loading method and surface-grinding apparatus with work position deviation-adjusting mechanism Dec. 5, 2000
6062961 Wafer polishing head drive May. 16, 2000
5947802 Wafer shuttle system Sep. 7, 1999
5618227 Apparatus for polishing wafer Apr. 8, 1997
5333413 Automatic wafer lapping apparatus Aug. 2, 1994
5329732 Wafer polishing method and apparatus Jul. 19, 1994
5274956 Device for grinding the working rolls of a planetary mill Jan. 4, 1994
5216842 Glass grinding and polishing machine Jun. 8, 1993
5182881 Automated spindle slurry system Feb. 2, 1993
5117590 Method of automatically chamfering a wafer and apparatus therefor Jun. 2, 1992
5115599 Apparatus for removal of workpiece elements, particularly bolt, rod or disk-shaped elements, from a cutting apparatus May. 26, 1992
4856232 Workpiece carrier means for surface grinding machine Aug. 15, 1989
4848039 Method and apparatus for grinding multiple workpieces Jul. 18, 1989
4802311 Method of grinding rotary workpieces Feb. 7, 1989
4787178 Fluid-jet cutting apparatus Nov. 29, 1988
4787176 Drill bit sharpening apparatus Nov. 29, 1988
4680896 Tool unloading mechanism for automatic tool grinding machine Jul. 21, 1987
4672775 Method and apparatus for grinding multiple workpieces Jun. 16, 1987
4468893 Machine for machining and in particular grinding cylindrical surfaces Sep. 4, 1984
4434583 Automatically adjustable workpiece guide and feed mechanism Mar. 6, 1984
4406091 Apparatus for grinding the edges of glass sheets Sep. 27, 1983
4251957 Workpiece transfer apparatus for a plurality of machine tools Feb. 24, 1981
4209087 Workpiece feed and removal mechanism Jun. 24, 1980
4161849 Auxiliary workpiece-loading and -unloading apparatus Jul. 24, 1979
4148161 Loading unit for an automatic bur grinding machine Apr. 10, 1979
4043767 Centerless grinding machine using tangential-feed method Aug. 23, 1977
4038785 Method and apparatus for transferring and operating on articles Aug. 2, 1977
4033076 Cylindrical grinding machine with workpiece loader and unloader Jul. 5, 1977
4030252 Workpiece transporting structure for use with a cylindrical grinder Jun. 21, 1977
4019283 Grinding machine loader assembly Apr. 26, 1977
4002246 Apparatus for handling workpieces such as semiconductor substrates Jan. 11, 1977











 
 
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