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Class Information
Number: 175/326
Name: Boring or penetrating the earth > With tool shaft detail > Shaft carried guide or protector > Engaging means advances in adjacent hole
Description: Apparatus under subclasses 325.1+ in which at least a portion of the guide means advances with the tool, and is described as larger than the area of bore being formed so that the advance is guided by a surface (generally a performed bore) that is laterally spaced from the bore currently being formed by the tool.

Patents under this class:

Patent Number Title Of Patent Date Issued
8662206 Apparatus and method for making boreholes in the ground, the cross sections of which boreholes partially intersect Mar. 4, 2014
8505650 Apparatus and method for making boreholes in the ground, the cross sections of which boreholes partially intersect Aug. 13, 2013
8485281 Equipment for drilling secant holes Jul. 16, 2013
7258165 Hole opener and drillable casing guide and methods of use Aug. 21, 2007
5407011 Downhole mill and method for milling Apr. 18, 1995
5261492 Well casing apparatus and method Nov. 16, 1993
5224558 Down hole drilling tool control mechanism Jul. 6, 1993
4432422 Borehole guide and method of boring interpenetrating holes Feb. 21, 1984
4205881 Machine and method for mining hard material in-situ between adjacent auger holes Jun. 3, 1980
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
3987857 Side cutting device for earth boring procedures Oct. 26, 1976

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