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Class Information
Number: 175/359
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Circumferentially displaced cutter axes > Mutually contacting cutter supports > With bearing or seal details
Description: Apparatus provided with a specific bearing or seal structure.










Patents under this class:

Patent Number Title Of Patent Date Issued
8672060 High shear roller cone drill bits Mar. 18, 2014
8196682 Earth boring bit with wear resistant bearing and seal Jun. 12, 2012
7621346 Hydrostatic bearing Nov. 24, 2009
7461708 Elastomeric seal assembly having auxiliary annular seal components Dec. 9, 2008
7387178 Self relieving seal Jun. 17, 2008
7201241 Self relieving seal Apr. 10, 2007
6976548 Self relieving seal Dec. 20, 2005
6820704 Rock bit seal with extrusion prevention member Nov. 23, 2004
6802380 Pressure relief system and methods of use and making Oct. 12, 2004
6769500 Optimized earth boring seal means Aug. 3, 2004
6401843 Drilling head with a cone rock bit Jun. 11, 2002
6176331 Bearing sealing means of earth boring bits Jan. 23, 2001
5148879 Spindle cap bearing for rotary cone rock bits Sep. 22, 1992
5016719 Rotary cone type rock bits May. 21, 1991
4895215 Seal cage assembly for relatively movable members Jan. 23, 1990
4825964 Arrangement for reducing seal damage between rotatable and stationary members May. 2, 1989
4756631 Diamond bearing for high-speed drag bits Jul. 12, 1988
4753303 Earth boring bit with two piece bearing and rigid face seal assembly Jun. 28, 1988
4613005 Unitized seal for severe service applications Sep. 23, 1986
4306727 Dynamic seal for rolling cutter drill bit Dec. 22, 1981
3964554 Temperature-regulated, sealed bearing system for rock drill bits Jun. 22, 1976











 
 
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