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Class Information
Number: 175/241
Name: Boring or penetrating the earth > With means movable relative to tool below ground to stop flow toward bore bottom > Stops flow by movement about fixed pivot
Description: Apparatus in which the movable means is pivotally mounted to move from flow permitting to flow blocking position.

Sub-classes under this class:

Class Number Class Name Patents
175/242 Pivot transverse to tool axis 14

Patents under this class:

Patent Number Title Of Patent Date Issued
8500370 Excavation and compaction equipment for the construction of screw piles Aug. 6, 2013
7726418 Method and apparatus for adding a tubular to drill string with diverter Jun. 1, 2010
7357199 Bit for excavation and compaction equipment for erecting piles, and excavation equipment provided with said bit Apr. 15, 2008
7343983 Method and apparatus for isolating and testing zones during reverse circulation drilling Mar. 18, 2008
4331315 Actuatable safety valve for wells and flowlines May. 25, 1982

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