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
Low-coupling oxide media (LCOM)
Electric discharge machining hole drilling
Managing multiple web services on a single device
Web development environment that enables a developer to interact with run-time output presentation of a page
Reovirus for the treatment of cellular proliferative disorders
Apparatus for performing timer management regarding a system timer scheduler service, and associated method
Antisense modulation of C-reactive protein expression
  Randomly Featured Patents
Continuous method of making a three dimensional sail
Spark ignition engine with cylinder head combustion chamber
Apparatus and method for collecting and dewatering the contents of sanitary sewer traps
System and method of selectively varying supply voltage without level shifting data signals
Easy opening packaging for liquid or gel products
System and method for controlling the number of plays of an electronic game
Ultrasonic probe and ultrasonic elasticity imaging device
Protected bellows for valve
Rotating electrical machine
Imaging apparatus