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Class Information
Number: 175/395
Name: Boring or penetrating the earth > Bit or bit element > With helical-conveying portion > Impact type
Description: Apparatus in which the cutting edge of the bit is of the type which is adapted to disintegrate the formation by percussive action.










Patents under this class:

Patent Number Title Of Patent Date Issued
8336647 Sonic drill bits and sonic drilling systems Dec. 25, 2012
7984773 Sonic drill bit for core sampling Jul. 26, 2011
7891444 Drill bit Feb. 22, 2011
7614170 Extendable excavating screw unit equipped with hydraulic excavating auxiliary blades Nov. 10, 2009
7309195 Shank for a rotary and/or percussive tool Dec. 18, 2007
7261169 Shank for a rotary/percussion tool Aug. 28, 2007
7231992 Drill bit Jun. 19, 2007
7225890 Cutting plate for a drill bit Jun. 5, 2007
7185721 Male portion, drill bit and threaded joint for percussive rock drilling Mar. 6, 2007
7114584 Hollow auger head assembly Oct. 3, 2006
7090038 Bedrock drilling and excavating apparatus Aug. 15, 2006
7028790 Rotary drill bit Apr. 18, 2006
6564887 Core drill May. 20, 2003
6328506 Masonry drill bit Dec. 11, 2001
6102634 Masonry drill bit Aug. 15, 2000
5984596 Insertable tool and tool holder for drilling and/or impacting electric machines Nov. 16, 1999
5779403 Percussive blow assisted rotary drill Jul. 14, 1998
5553682 Rock drill Sep. 10, 1996
5382121 Drill bit for use in concrete and asphalt Jan. 17, 1995
5113626 Earth anchor apparatus having improved load bearing element May. 19, 1992
4924953 Rock drill May. 15, 1990
4696355 Drilling tools Sep. 29, 1987
4579180 Drilling bit Apr. 1, 1986
4548281 Apparatus and method for installing well casings in the ground employing resonant sonic energy in conjunction with hydraulic pulsating jet action Oct. 22, 1985
4286677 Helical impact bit for drilling stone with narrow guide lips Sep. 1, 1981
4262762 Anti-collaring structure for impact bit Apr. 21, 1981
4202420 Rock drill with hard metal drilling head May. 13, 1980
4091884 Rotary air percussion bit May. 30, 1978
4047722 Hammer drilling devices Sep. 13, 1977











 
 
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