Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7845437 | Hole opener assembly and a cone arm forming a part thereof An improved hole opener assembly for horizontal drilling is disclosed that is less prone to failure as a result of cone arm break out or pocket side wall fracture. The interface between the cone arm and the pocket employs a key and slot configuration with a tighter ... | 12/07/2010 |
| 7571781 | Auger bit The invention relates to an auger bit for an earth auger, in which at least two curved plates are provided and extend radially outwards from a drilling axis, the axial height decreasing radially outwards. ... | 08/11/2009 |
| 7419017 | Multi-sectional percussive drill bit assembly A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit that is rotationally driven by a lug and pocket str... | 09/02/2008 |
| 7389833 | Multi-sectional percussive drill bit assembly A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit that is rotationally driven by a lug and pocket str... | 06/24/2008 |
| 7383901 | Releasable auger tooth A releasable auger tooth for an auger includes a slot shaped to fit a U-shaped or substantially U-shaped recess of a tooth holder element, and a tooth channel shaped to receive at least part of a shock-absorbing element and/or a wedging element. A holder element and... | 06/10/2008 |
| 7152702 | Modular system for a back reamer and method A modular back reamer to be used in subterranean drilling includes a drive stem, a reamer body having a plurality of receptacles, wherein the receptacles are configured to retain a cutting leg assembly, and a plurality of shims engaged within the receptacles to secu... | 12/26/2006 |
| 7131505 | Drilling with concentric strings of casing The present invention provides a method and apparatus for setting concentric casing strings within a wellbore in one run-in of a casing working string. In one aspect of the invention, the apparatus comprises a drilling system comprising concentric casing strings, wi... | 11/07/2006 |
| 7121770 | Tool body and cutting insert for metal cutting operations A cutting tool body that is adapted for use in milling operations comprises at least one pocket for supporting a cutting insert. The pocket is defined, at least in part, by a cylindrical wall and a seating surface within the tool body. At least one passage is provid... | 10/17/2006 |
| 7096982 | Drill shoe A method and apparatus for a drilling with casing includes therewith a drill shoe configured for later drilling through thereof in situ, with cutters retainable thereon in response to the forces encountered during borehole drilling, yet moveable from the envelope th... | 08/29/2006 |
| 7096981 | Alternating inclinations of compacts for drill bit Compacts are oriented in certain places on roller cones of an earth boring bit to increase the number of compacts in certain rows. The compacts that are pressed into holes in rows on the cones. The compacts are of tungsten carbide and have a cutting end axis and a b... | 08/29/2006 |
| 7066288 | Asymmetric compact for drill bit Asymmetrical compacts are utilized in certain places on roller cones of an earth boring bit to increase the number of compacts in certain rows. The compacts that are pressed into holes in rows on the cones. The compacts are of tungsten carbide and have a cutting end... | 06/27/2006 |
| 7040424 | Drill bit and cutter having insert clusters and method of manufacture Disclosed is a rolling cone cutter and drill bit employing multiple inserts retained as a cluster in an aperture in the cone cutter. Apertures in which the insert clusters are retained are multilobed apertures formed by intersecting bores formed in the cone steel. T... | 05/09/2006 |
| 7025155 | Rock bit with channel structure for retaining cutter segments A roller cone body defines a circumferential channel or race into which a plurality of cutter or wear segments are mounted. The wear segments may be of any appropriate contour or shape, such as for example chisel, spherical, or even flat face and are preferably made... | 04/11/2006 |
| 6932172 | Rotary contact structures and cutting elements Cutter elements including pointed contact structures and elements, and rock tools or bits for carrying those elements, for chipping, cutting, and breaking non-ductile materials are disclosed. The cutter elements, the ends of which directly contact and cut through ro... | 08/23/2005 |
| 6827159 | Steerable horizontal subterranean drill bit having an offset drilling fluid seal Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features. ... | 12/07/2004 |
| 6814168 | Steerable horizontal subterranean drill bit having elevated wear protector receptacles A steerable horizontal subterranean drill bit apparatus is disclosed. The apparatus may include a drill bit and a housing. The drill bit may include elevated wear protector receptacles in particular locations and configurations. ... | 11/09/2004 |
| 6810972 | Steerable horizontal subterranean drill bit having a one bolt attachment system Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features. ... | 11/02/2004 |
| 6810973 | Steerable horizontal subterranean drill bit having offset cutting tooth paths Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features. ... | 11/02/2004 |
| 6810971 | Steerable horizontal subterranean drill bit Various steerable horizontal subterranean drill bit apparatuses, which may have a drill bit, a housing and a one-bolt attachment system, or other features. ... | 11/02/2004 |
| 6742608 | Rotary mine drilling bit for making blast holes A rotary mine drilling bit for making blast holes having a connection at one end of the body for attachment to a drill string and the second end of the body having a plurality of longitudinally extending slots. A thrust shoulder is provided between the ends of the b... | 06/01/2004 |
| 6561291 | Roller cone drill bit structure having improved journal angle and journal offset A roller cone drill bit is shown which includes at least one roller cone rotatably mounted on a journal forming a part of a bit body. The at least one cone having cutting elements disposed at selected locations thereon. The at least one roller cone subten... | 05/13/2003 |
| 6427791 | Drill bit assembly for releasably retaining a drill bit cutter A drill bit assembly is provided for releasably retaining a polycrystalline diamond compact drill bit cutter. Two adjacent cavities formed in a drill bit body house, respectively, the disc-shaped drill bit cutter and a wedge-shaped cutter lock element wit... | 08/06/2002 |
| 6390087 | Drill bit for directional drilling The invention provides a rock drilling bit with a plurality of cutting teeth raked into the cut of the drilling bit. Such teeth are oriented at an angle of at least about 30 degrees relative to an imaginary line normal to a front surface of the cutting he... | 05/21/2002 |
| 6302224 | Drag-bit drilling with multi-axial tooth inserts Angled insertable drag bit teeth having a front portion at an oblique angle to a shank portion: the front portion is nearly parallel to the direction of thrust during cutting, and is bonded, along a substantial part of its length, to a groove in the bit b... | 10/16/2001 |
| 6283234 | Apparatus for mounting PCD compacts A method and apparatus for improved attachment of an ultra-hard compact, especially a two-layer disk-type PCD compact, to a tool or support surface with a mechanical connection. In general the ultra-hard compact is provided with a tool-engaging threaded e... | 09/04/2001 |
| 6213231 | Boring tool with rectangular plates A boring tool is provided with first and second rectangular reversing cut plates which have, in each case, two short and two considerably longer cutting edges. One of the reversing cut plates is arranged connecting to or intersecting the axis of rotation ... | 04/10/2001 |
| 6021856 | Bit retention system A downhole hammer bit including at least one bit impact head mounted to a vertical guide member by a plurality of retaining ring segments. Opposed surfaces of the bit impact head and the guide member have corresponding circumferential grooves or groove se... | 02/08/2000 |
| 6022176 | Tool bit with marking member A tool bit for working in a previously drilled blind bore (5) has a shank section (2) insertible into the blind bore and a chuck section (1) extending co-axially from a drilling end of the shank section. A marking member (15) facing toward the base of the... | 02/08/2000 |
| 5996714 | Rotatable cutting bit assembly with wedge-lock retention assembly A cutting bit has a bit body which has a forward end and a rearward end. The bit body contains a seat at the forward end thereof. The bit body contains a bore intersecting the seat wherein a bore wall defines the bore. A cutting insert is received by the ... | 12/07/1999 |
| 5810103 | Method and apparatus for mounting PCD compacts A method and apparatus for improved attachment of a PCD compact, especially a two-layer disk-type PCD compact, to a tool or support surface with a mechanical connection. In general the PCD compact is provided with a blind bore in the substrate layer, the ... | 09/22/1998 |
| 5735360 | Mining bit A rotary mining bit is particularly suitable for use in the drilling of blasting holes in the mining industry, but may also be used for drilling wells and the like in both soft materials and hard, rocky materials. The bit comprises a central hollow body w... | 04/07/1998 |
| 5588497 | Mounting drill buttons A method of mounting a hard insert in a cutting tool such as a drill bit is disclosed. The insert has a head and a shank which tapers inwardly in a direction away from the head of the insert. The cutting tool body has several seats which are shaped and ta... | 12/31/1996 |
| 5497843 | Hollow auger head assembly In a hollow earth auger head assembly a plurality of bit-holding pockets are provided, spaced circumferentially from one another around an open mouth of an auger head, and bits taken selectively from a multiplicity of types of cutting teeth, have a shank ... | 03/12/1996 |
| 5498069 | Bit holder with a detachably fixed bit bushing The bit holder (1) is nonpositively connected to a bit bushing (3) with adherence to a pressure per unit of surface area of >100N/mm2 between the conical outer surface of the bit bushing (3) and the inner wall of the receiving bore (2) of the b... | 03/12/1996 |
| 5370448 | Wedging arrangement for attaching a bit holder to the base member of a mining road working, or earth moving machine A base member and bit holder assembly for replaceably mounting a bit on a mining machine, road working machine or earth moving machine. The bit is of the type having a shank terminating in at least one working end. The bit holder has a shank receiving per... | 12/06/1994 |
| 5302005 | Apparatus for holding a cutting bit A mining bit holding system is provided which includes a bit holder which attaches to the rotatable drum of a mining machine. The bit holder includes a base portion and a body portion. The body portion has an aperture therethrough, to receive a sleeve. Th... | 04/12/1994 |
| 5174396 | Cutter assemblies for rotary drill bits A cutter assembly for a rotary drill bit comprises an elongate stud to be received in a socket in the surface of the bit body, the stud having mounted at one end thereof a preform cutting element. At least a major part of the stud is generally in the form... | 12/29/1992 |
| 5150636 | Rock drill bit and method of making same A rock drill bit having a shank and a replaceable cutting head, comprising steps of producing a shank having a tip with an outer surface having a given shape, producing a head having a working face at one end and a recess at the other end with a cross-sec... | 09/29/1992 |
| 5139099 | Excavation tool An excavation tool, in which a device is provided which receives the striking force of a hammer and the rotational force of a hammer cylinder, in a bottom surface of which at least three axle holes are provided displaced from a center of the device and at... | 08/18/1992 |
| 5088797 | Method and apparatus for holding a cutting bit A mining bit holding system is provided which includes a bit holder which attaches to the rotatable drum of a mining machine. The bit holder includes a base portion and a body portion. The body portion has an aperture therethrough to receive a sleeve. The... | 02/18/1992 |
