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Class Information
Number: 175/333
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Core forming-type bit > With core-breaking means
Description: Apparatus in which the bit is further provided with means to disintegrate the undisturbed cylindrical portion of the formation after it has been formed.










Patents under this class:

Patent Number Title Of Patent Date Issued
7878271 Drill bit Feb. 1, 2011
6792735 Advanced processes for coring and grouting masonry Sep. 21, 2004
5695019 Rotary cone drill bit with truncated rolling cone cutters and dome area cutter inserts Dec. 9, 1997
5497841 Methods for coring a masonry wall Mar. 12, 1996
5176212 Combination drill bit Jan. 5, 1993
5145017 Kerf-cutting apparatus for increased drilling rates Sep. 8, 1992
5031708 Cockable corebreaker apparatus Jul. 16, 1991
5016718 Combination drill bit May. 21, 1991
4527644 Drilling bit Jul. 9, 1985
4186808 Earth boring machine with crushing rollers Feb. 5, 1980











 
 
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