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Class Information
Number: 175/279
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > With shifting mechanism spring biased to operative position > Cam or gear means movable to shift cutter element
Description: Apparatus in which the shaft or bit head is provided with a cam or gear element other than the cutter element which is movable thereon, said element having a portion which engages the laterally movable cutter element or a part connected thereto to cause the cutter element to be moved.










Sub-classes under this class:

Class Number Class Name Patents
175/280 With forwardly extending noncutting portion 1


Patents under this class:

Patent Number Title Of Patent Date Issued
8561724 Expanding mill having camming sleeve for extending cutting blade Oct. 22, 2013
8371389 Differential shifting tool and method of shifting Feb. 12, 2013
8302706 Apparatus and method for installing ground anchoring systems Nov. 6, 2012
8104549 Activating device for a downhole tool Jan. 31, 2012
8083010 Drilling device for drilling and reaming of a hole Dec. 27, 2011
7493971 Concentric expandable reamer and method Feb. 24, 2009
7370712 Under reamer May. 13, 2008
6691804 Directional borehole drilling system and method Feb. 17, 2004
6668949 Underreamer and method of use Dec. 30, 2003
6484819 Directional borehole drilling system and method Nov. 26, 2002
6378626 Balanced torque drilling system Apr. 30, 2002
6286614 Motion compensator for drilling from a floater Sep. 11, 2001
5853054 2-Stage underreamer Dec. 29, 1998
5351758 Tubing and profile reaming tool Oct. 4, 1994
5010955 Casing mill and method Apr. 30, 1991
4842082 Variable outside diameter tool for use in pikewells Jun. 27, 1989
4431065 Underreamer Feb. 14, 1984
4252201 Drilling method and apparatus Feb. 24, 1981











 
 
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