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Class Information
Number: 175/91
Name: Boring or penetrating the earth > Boring means including a continuously rotating bit describing a noncircular cross-sectional bore
Description: Apparatus in which (1) a single cutting means rotating through recurring cycles, or (2) a combination of cutting means carried on a common support and including at least one cutting means rotating through recurring cycles, is particularly adapted to form in a single advance a bore which is noncircular in a plane perpendicular to the bore axis.










Patents under this class:

Patent Number Title Of Patent Date Issued
8383559 Releasable corrosion inhibitors Feb. 26, 2013
7559161 Soil working method and apparatus Jul. 14, 2009
7367143 Cutter and method for working the soil May. 6, 2008
7192094 Auger flight support system Mar. 20, 2007
7120565 Method and apparatus for determining figure Oct. 10, 2006
6679559 Auger flight support for plural auger coal mining systems Jan. 20, 2004
6588515 Drill bit for directional drilling Jul. 8, 2003
5964305 Trench wall cutter Oct. 12, 1999
5937954 Method for directional drilling Aug. 17, 1999
5190407 Rectangular shield excavating machine Mar. 2, 1993
4844549 Milling machine for digging trenches in the earth Jul. 4, 1989
4834197 Trench cutter May. 30, 1989
4824176 Milling engine for excavating trenches in the ground Apr. 25, 1989
4694915 Slotted wall milling cutter Sep. 22, 1987
4629010 Process and device for sinking wells Dec. 16, 1986
4486050 Rectangular tunnel boring machine and method Dec. 4, 1984
4400036 Corner-cutting mining assembly Aug. 23, 1983
4391472 Core eliminator for mining, road working or earth moving machinery Jul. 5, 1983
4205881 Machine and method for mining hard material in-situ between adjacent auger holes Jun. 3, 1980
4143919 Mining machinery with guideway for relatively movable cutting units Mar. 13, 1979
4082362 Apparatus for coal mining in-cutting and out-cutting Apr. 4, 1978
4074778 Square hole drill Feb. 21, 1978
4071100 Method of making holes of selected external configuration in preferably rock or ground formation, and a drilling machine for carrying out the method Jan. 31, 1978
4059163 Mine drilling apparatus and method Nov. 22, 1977
4036529 Support system for a unitized pair of auger conveyors Jul. 19, 1977
4035024 Hard rock trench cutting machine Jul. 12, 1977
4025119 Method and apparatus for strip mining May. 24, 1977
4015674 Apparatus for unitizing a pair of augers Apr. 5, 1977
3983949 Auger section positioning means Oct. 5, 1976
3965995 Machine for boring a large diameter blind hole Jun. 29, 1976
3958832 Drum mining head with cutter pattern May. 25, 1976
3957305 In situ values extraction May. 18, 1976











 
 
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