Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/294
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > Combined with safety joint
Description: Apparatus combined with a joint between two parts which may be selectively uncoupled below ground independently of other joints in the apparatus, such that one part may be left in the bore while the other part is withdrawn therefrom.










Patents under this class:

Patent Number Title Of Patent Date Issued
8590642 Percussion hammer bit retention system Nov. 26, 2013
7267185 Bit retainer system Sep. 11, 2007
5086843 Oil tool release joint Feb. 11, 1992
4064953 Shear sub for drill string Dec. 27, 1977











 
 
  Recently Added Patents
Identifying conceptually related terms in search query results
Wireless communications system, wireless communications apparatus, wireless communications method and computer program for wireless communication
Apparatus and method for information display of portable device
Thermosensitive recording medium
Photomask blank, photomask blank manufacturing method, and photomask manufacturing method
Vacuum cleaner filter adapter ring
Use of tris(hydroxymethyl) aminomethane for the stabilization of peptides, polypeptides and proteins
  Randomly Featured Patents
Metal stud frame element construction panel
Arm for a programme controlled manipulator
Alumina hydrate particle, alumina hydrate particle dispersion sol and liquid coating for forming ink-receiving layer and substrate having ink-receiving layer
Construction vehicle
Remote monitoring of undersea cable systems
Method and device for welding metallic fibers into a fleece by repeatedly carrying out a welding process, fleece having welded metallic fibers and method of filtering exhaust gas with a fleece
Window treatment accessory
Method for compensating drill pipe and near-borehole effect on and electronic noise in transient resistivity measurements
2-phosphono-butane-1,2,4,-tricarboxylic acid emulsifier derivatives
Anti-fuse memory cell