LandOfFree - US Patents - Listing for Boring or penetrating the earth,Bit or bit element,Rolling cutter bit or rolling cutter bit element

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Sealing system for a rotary rock bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Secondary cutting structure

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Self relieving seal

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Self relieving seal

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Self relieving seal

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Self sharpening steel tooth cutting structure

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Self-lubricating elastomeric seal with polarized graphite

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Self-penetrating drilling method and thrust-generating tool...

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shaft drill bit with improved cutter bearing and seal arrangemen

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shaft drill bit with overlapping cutter arrangement

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shale diverting means for a sealed bearing drill bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shank structure for rotary drill bits

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shaped inserts with increased retention force

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Sharp gage for mill tooth rock bits

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Sharp gage for mill tooth rockbits

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shirttails for reducing damaging effects of cuttings

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shirttails for reducing damaging effects of cuttings

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Shirttails for reducing damaging effects of cuttings

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Single cone earth boring bit