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Class Information
Number: 175/259
Name: Boring or penetrating the earth > Tool removable or insertable through or around driving or driven shaft or casing > Laterally shiftable cutter element movable through shaft > Plural cutter elements longitudinally relatively movable into transverse alignment
Description: Apparatus in which a plurality of cutter elements are movable through the shaft, said cutter elements being movable relative to each other in the direction of the longitudinal axis of the shaft to an operative position in which the cutting edges of the cutter elements lie in the same transverse plane perpendicular to the longitudinal axis of the shaft.










Patents under this class:

Patent Number Title Of Patent Date Issued
8668031 Drill bit and method for inserting, expanding, collapsing, and retrieving drill bit Mar. 11, 2014
6695074 Method and apparatus for enlarging well bores Feb. 24, 2004
6691803 Drill bit assembly having pivotal cutter blades Feb. 17, 2004
6454024 Replaceable drill bit assembly Sep. 24, 2002
6206114 Tool for transporting cutting means to and from a ground drill Mar. 27, 2001
6059053 Retraction system for a latching mechanism of a tool May. 9, 2000
5957224 Double bit assembly and method of using the same Sep. 28, 1999
5881827 Extendable bit Mar. 16, 1999
5813481 System for in situ replacement of cutting means for a ground drill Sep. 29, 1998
5743344 System for in situ replacement of cutting means for a ground drill Apr. 28, 1998
5472057 Drilling with casing and retrievable bit-motor assembly Dec. 5, 1995
5197553 Drilling with casing and retrievable drill bit Mar. 30, 1993
5148875 Method and apparatus for horizontal drilling Sep. 22, 1992
5074366 Method and apparatus for horizontal drilling Dec. 24, 1991
4760888 Drill bit for core boring Aug. 2, 1988











 
 
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