Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
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











 
 
  Recently Added Patents
Method and device for the detection of defects or correction of defects in machines
Current collector for lead acid battery
Micromachined devices and fabricating the same
Method for adjusting link speed and computer system using the same
Mobile terminal based on W-CDMA system having receive diversity function and system thereof
Dynamic lookup service in a distributed system
Display screen with an animated graphical user interface
  Randomly Featured Patents
Electronic device mount system for weapons
Combined luggage snap hook and ring
Device for limiting pivotal movements of a lawn mower handle
Data protection structure
Control system of interstand tension of continuous rolling mills
Brush for applying nail varnish and method
Method of manufacturing a welding stud
Emission control
Process for thymosin .alpha..sub.1
Current measuring apparatus for power supply