Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/387
Name: Boring or penetrating the earth > Bit or bit element > Bit with leading portion (e.g., pilot) forming smaller diameter initial bore > Leading portion is core forming type
Description: Apparatus in which the leading or pilot portion has a cutter element or cutting edge so arranged that the bit makes an annular cut in the formation, leaving a central undisturbed portion of the formation in the form of a cylinder.










Patents under this class:

Patent Number Title Of Patent Date Issued
8025466 Removable countersink bit Sep. 27, 2011
7055632 Well stimulation tool and method for inserting a backpressure plug through a mandrel of the tool Jun. 6, 2006
7021404 Method and device for deviated coring and/or drilling Apr. 4, 2006
5643069 Drill for drilling brittle materials Jul. 1, 1997
5038873 Drilling tool with retractable pilot drilling unit Aug. 13, 1991
4552231 Rotating pilot core bit for use in highly fractured formations Nov. 12, 1985
4440247 Rotary earth drilling bit Apr. 3, 1984
4324300 Rotary drill bit Apr. 13, 1982
3955631 Soil sampler May. 11, 1976











 
 
  Recently Added Patents
Wireless subscriber managing storage of HARQ packets
Hepatitis C virus inhibitors
Method and apparatus for providing contention-based resource zones in a wireless network
Satellite communication network
Method of using nutritional compounds dihydroquercetin (taxifolin) and arabinogalactan in combination with dihydroquercetin (taxifolin) to reduce and control cardiometabolic risk factors assoc
Crystal structure of human JAK3 kinase domain complex and binding pockets thereof
System for alarming upon occurrence of secession of smart key for vehicles
  Randomly Featured Patents
Antenna for personal mobile communications or locating equipment
Glow key chain
Laminated steel return path with actuator support features
Method for producing a semiconductor device have fin-shaped semiconductor regions
Armored attack vehicle with helmet assembly
Pulsation throttling device for a pressure gauge
Method and system for saving and retrieving spatial related information
Dental retraction cord
Use of aluminum tris(-O-ethyl phosphonate) as an ammonium nitrification compound
Medical vial