Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/271
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > With latch operated by fluid pressure or dropped element
Description: Apparatus in which the laterally movable cutter element is held in one position, either expanded or collapsed, by a movable latch member, said latch member being moved by (1) a fluid under pressure acting against the latch or a part connected thereto or (2) engaging a part which is specifically described as being dropped from above ground to an operative position below ground.










Patents under this class:

Patent Number Title Of Patent Date Issued
8485282 Earth-boring tools having expandable cutting structures and methods of using such earth-boring tools Jul. 16, 2013
RE41119 Borehole opener Feb. 16, 2010
7597158 Drilling and hole enlargement device Oct. 6, 2009
7370712 Under reamer May. 13, 2008
7195080 Expandable drilling tool and method Mar. 27, 2007
6953096 Expandable bit with secondary release device Oct. 11, 2005
6427788 Underreaming rotary drill Aug. 6, 2002
6360831 Borehole opener Mar. 26, 2002
5184687 Well reamer Feb. 9, 1993
4889197 Hydraulic operated underreamer Dec. 26, 1989











 
 
  Recently Added Patents
Electric motor
Vehicle inertial sensor systems
Stabilised prostaglandin composition
Systems, methods, and apparatus to prepare a mobile device for provisioning
Invisible fence battery charger
Method and apparatus for exercise monitoring combining exercise monitoring and visual data with wireless internet connectivity
Multiple CQI feedback for cellular networks
  Randomly Featured Patents
Process for combined decoating and melting of aluminum scrap contaminated with organics
Fuser stripper baffle and a printing machine including the same
Method for optically transmitting signals in measurement units and measurement system employing the optical transmission method
Hold-down metal plate for securing a fuel injection valve
Non-solvent precipitation of polymer composition
Maintenance device for exchanging yarn supply packages at spindle assembly stations of a yarn processing machine
Method, system, and apparatus for utilizing compressed program code in the boot block portion of a computer BIOS
Abrasive sponge grip
Method and system for a heterogeneous computer network system with unobtrusive cross-platform user access
Display control apparatus, display control method and program