Famous Patents
The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8146686 | Fiber-containing cutting tools Fibers for diamond-impregnated cutting tools and their associated methods for manufacture and use are described. A matrix is formed that contains fibers made from carbon, glass, ceramic, polymer, and the like. The matrix is then sintered to form a cutting portion of... | 04/03/2012 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 7341118 | Rotating dry drilling bit A rotating dry drilling bit for low thrust drilling of an annular bore hole into a body of rock and obtaining an extremely small diameter core sample comprises a bit crown moulded to the end of an annular steel body. The bit crown comprises a plurality of radially e... | 03/11/2008 |
| 7334652 | Roller cone drill bits with enhanced cutting elements and cutting structures Roller cone drill bits are provided with cutting elements and cutting structures optimized for efficient drilling of soft and medium formations interspersed with hard stringers. The cutting elements and cutting structures may be satisfactorily used to drill downhole... | 02/26/2008 |
| 6918222 | Fastener for spacing object from substrate A novel fastener for holding and spacing an object at a predetermined distance from a substrate comprises a bridge portion, a first prong extending in a driving direction from the bridge portion, and a second prong spaced from the first prong and extending generally... | 07/19/2005 |
| 6412575 | Coring bit and method for obtaining a material core sample The present invention provides a brush bit for cutting a core sample from an unconsolidated formation with reduced fragmentation or damage to the core sample by using a plurality of stiff bristles to cut rock from around the core sample. The present inven... | 07/02/2002 |
| 6102135 | Portable core sampler A portable core sampler includes a portable electric drill having an output rotary shaft connected detachably to a coupler shaft that supports a water swivel which connects a source of water to an axial water delivery passageway in the coupler shaft. The ... | 08/15/2000 |
| 5494123 | Drill bit with protruding insert stabilizers A rotary cone rock bit has bearing inserts pressed into the side of the shirttail portion of the rock bit body for stabilizing the rock bit during drilling. Such a rock bit has a steel bit body with a threaded upper pin for connection to a drill string. C... | 02/27/1996 |
| 5454437 | Roller cone core bit The present invention relates to an improved roller cone core bit comprising a plurality of cone cutters facing inboard and a single cone cutter facing outboard. The single outboard facing cone cutter provides additional cutting elements for cutting a cor... | 10/03/1995 |
| 5394952 | Core cutting rock bit A roller cone drill bit is disclosed that leaves uncut a substantial formation core having a diameter from 10% to 25% of the bit gage diameter. The bit is designed to have normal size bearings, cone shell thickness and cutter protrusion to allow the use o... | 03/07/1995 |
| 5074367 | Rock bit with improved shank protection An improved rotary rock bit is described having a plurality of wear resistant inserts protruding along the leading edge of the bearing segment shanks. These inserts break up large chunks of formation which protrude inward from the borehole wall while dril... | 12/24/1991 |
| 4630692 | Consolidation of a drilling element from separate metallic components The method of forming a cutter, which includes a core and a wear resistant insert defining a body means which includes (a) applying to the body means a mixture of: (i) wear resistant metallic powder, and (ii) binder (b) volatilizing the binder, (d) and applying pre... | 12/23/1986 |
