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Class Information
Number: 451/375
Name: Abrading > Work holder > Clamp > Edge tool > Rotary cutter > Drill
Description: Clamping rotary edge tool holder especially adapted for securing a drill bit in position while being abraded.










Sub-classes under this class:

Class Number Class Name Patents
451/376 Pattern control 17


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8690643 Portable drill bit sharpener Apr. 8, 2014
8439727 Drill bit sharpening tool May. 14, 2013
8425277 Device for sharpening a twist drill point and a method for its use Apr. 23, 2013
7559828 Double-grinding-wheel type drill bit grinding device with a single driving shaft and grinding method thereof Jul. 14, 2009
7473163 Cutter grinding device Jan. 6, 2009
7300334 Drilling-head-grinding positioning device Nov. 27, 2007
7172498 Drill sharpener Feb. 6, 2007
7147546 Tool holder with moveable alignment finger Dec. 12, 2006
7143489 Multiple station tooling machine for manufacturing drill bits and other spirally grooved workpieces Dec. 5, 2006
7121932 Portable drill sharpener Oct. 17, 2006
6926593 Vehicle wheel hole deburring device and method Aug. 9, 2005
6824449 Clamping assembly Nov. 30, 2004
6676494 Drill bit grinder structure Jan. 13, 2004
6652367 Drill bit grinding device Nov. 25, 2003
6626745 Precision drill sharpener and grinding wheel assembly therefor Sep. 30, 2003
6283830 Grinding control unit of a tool bit grinder Sep. 4, 2001
6244938 Drill grinder Jun. 12, 2001
6186876 Apparatus for grinding welding electrodes, in particular wolfram electrodes Feb. 13, 2001
6113477 Drill abrasive apparatus Sep. 5, 2000
6110018 Apparatus and methods of sharpening cutting tools Aug. 29, 2000
6001002 Hand-held drill bit sharpening tool Dec. 14, 1999
5788559 Web adjust drill bit sharpener and method of using Aug. 4, 1998
5735732 Precision drill sharpener and grinding wheel assembly therefor Apr. 7, 1998
5676591 Bit sharpener Oct. 14, 1997
5649853 Drill bit grinding machine Jul. 22, 1997
5637036 Power tool adapter Jun. 10, 1997
5618028 Power tool adapter Apr. 8, 1997
5367836 Automatic drill loader Nov. 29, 1994
5353552 Root-strength drill bit and method of making Oct. 11, 1994
5327685 Electric drill completed with a set of grinding equipments Jul. 12, 1994
5319890 Bushingless workhead Jun. 14, 1994
5263286 Drill and drill grinding method and apparatus Nov. 23, 1993
5241791 Edge tool sharpening apparatus Sep. 7, 1993
5210977 Drill grinding device May. 18, 1993
5184431 Apparatus for the grinding of workpieces, especially tools Feb. 9, 1993
5184430 Machine for machining edges, particularly of glass plates Feb. 9, 1993
5125186 Drill grinding machine Jun. 30, 1992
4995301 Tri-motion grinding fixture Feb. 26, 1991
4974372 Universal device for sharpening drill bits Dec. 4, 1990
4916867 Drill bit sharpener Apr. 17, 1990
4858389 Apparatus for grinding twist drills Aug. 22, 1989
4848036 Grinding machine for drill bits Jul. 18, 1989
4821463 Drill bit sharpening apparatus Apr. 18, 1989
4787176 Drill bit sharpening apparatus Nov. 29, 1988
4782633 Drill bit sharpening method Nov. 8, 1988
4779317 Automatic machine for milling drill points on rod blanks Oct. 25, 1988
4769955 Fixture for holding a hole-cutting tool having cutting edges to be ground Sep. 13, 1988
4742648 Drill sharpening tool May. 10, 1988
4716688 Fixture for holding a hole-cutting tool having cutting edges to be ground Jan. 5, 1988
4703588 Drill cutting edge grinder Nov. 3, 1987

1 2










 
 
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