Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/305
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Telescoping members relatively rotatable
Description: Apparatus in which the telescoping members are so arranged that they may freely rotate relative to each other.










Sub-classes under this class:

Class Number Class Name Patents
175/306 With means to couple members to prevent relative rotation 32


Patents under this class:

Patent Number Title Of Patent Date Issued
8657007 Hydraulic jar with low reset force Feb. 25, 2014
8511403 Steerable ground piercing tools Aug. 20, 2013
8256539 Steerable ground piercing tools Sep. 4, 2012
7748446 Seismic source and method of generating a seismic wave in a formation Jul. 6, 2010
7299885 Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring Nov. 27, 2007
7093677 Percussion drill head Aug. 22, 2006
7090038 Bedrock drilling and excavating apparatus Aug. 15, 2006
7044240 Torque absorber for downhole drill motor May. 16, 2006
6942046 Bore bit for very hard material Sep. 13, 2005
6722454 Device for drilling, in particular percussion drilling or rotary percussion drilling, boreholes Apr. 20, 2004
6659202 Steerable fluid hammer Dec. 9, 2003
6557653 Working tool for a percussion power tool May. 6, 2003
6488105 Method and apparatus for subsurface exploration Dec. 3, 2002
6164393 Impact tool Dec. 26, 2000
5918690 Bottom rotation shaft actuator Jul. 6, 1999
5881827 Extendable bit Mar. 16, 1999
5156223 Fluid operated vibratory jar with rotating bit Oct. 20, 1992
4958691 Fluid operated vibratory jar with rotating bit Sep. 25, 1990
4715454 Mechanical directional drilling jar with swivel means Dec. 29, 1987
4688649 Mechanical drill string jar Aug. 25, 1987
4662460 Rotary drilling jar May. 5, 1987
4621698 Percussion boring tool Nov. 11, 1986
4415047 Downhole case driving apparatus for impact drills Nov. 15, 1983











 
 
  Recently Added Patents
Soft co-processors to provide a software service function off-load architecture in a multi-core processing environment
Chain link
Liquid crystal display apparatus
Enzymatic demethylation of flavonoids
Software self-checking systems and methods
Method of measuring the flux of a soil gas
Automatic detection of image degradation in enhanced vision systems
  Randomly Featured Patents
Multivibrator circuit
Composition and method for the treatment of vitiligo
Process for preparing alkoxysilane cluster compounds by reacting a trialkoxysilanol with an amidated alkoxysilane cluster compound
Putter grip insert for reading a golf green
Semiconductor device having an improved connection arrangement between a semiconductor pellet and base substrate electrodes and a method of manufacture thereof
Method of forming reduced short channel field effect transistor
Retardation film, method for producing the same, polarizing plate and liquid crystal display
Power control or conversion apparatus
Radiation source, method of controlling a radiation source, lithographic apparatus, and method for manufacturing a device
Computer system