Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
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 |
| 8177000 | Modular system for a back reamer and method A modular back reamer to be used in subterranean drilling includes a drive stem connected to a drill string and configured to support a reamer body, the reamer body providing a plurality of receptacles, wherein the receptacles are configured to retain a cutting leg ... | 05/15/2012 |
| 7681671 | Drilling apparatus having in-line extending wings and driving method thereof The present invention relates to a borehole drilling apparatus with in-line extending wings and driving method thereof. The drilling apparatus comprises a guide device rotating while moving upwardly and downwardly in a casing to fit into a borehole, extending wings ... | 03/23/2010 |
| 7591329 | Auger with a movable gouge for making a borehole The invention relates to an auger for making a borehole that presents in its inside wall a groove that is substantially helical, said auger comprising: a hollow core provided with an outer helical blade; a movable cutter gouge suitable for taking up an active positi... | 09/22/2009 |
| 7293616 | Expandable bit An expandable drill bit for use with earth drilling equipment. The bit includes arms held in a closed position, so that the bit may be inserted through casing or a small bore hole. The arms are expandable to create an expanded drill bit having a crown profile common... | 11/13/2007 |
| 7290624 | Method and device for drilling holes in soil or rock material The invention relates to a method and device for the drilling, in particular the percussive drilling or rotary percussive drilling of holes (9) in the ground or in rock, a bore hole (9) being formed by a drill bit (1) that is mounted on a drill ... | 11/06/2007 |
| 7287938 | Machine tool A machine tool has a rotatable tool holder formed with an outwardly open seat having an outwardly directed floor and a cartridge engaged in the seat, carrying a cutting insert, and formed with an inwardly open groove defining a groove axis and having a surface confr... | 10/30/2007 |
| 7281594 | Rock drill bit The present invention relates to a rock drill bit for percussive drilling. The drill bit comprises a bit body, a head portion defining a longitudinal center axis. The head portion includes an axially forward rock-crushing surface and a skirt that extends axially rea... | 10/16/2007 |
| 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 |
| 7124843 | Bit assembly for a hammering drill A bit assembly for a hammering and rotating drill, in which a main drill body (1) is arranged to drill essentially a middle portion of the hole and in the main drill body (1) there is mounted one or more outer bits (2),(3) arranged to dri... | 10/24/2006 |
| 7089837 | Combination tool A combination tool including a base body with several reaming blades each having a chamfer and a guide surface, arranged around the circumference of the base body, for reaming a cylinder bore. The combination tool also has at least one grooving blade arranged axiall... | 08/15/2006 |
| 6929079 | Drill bit cutter element having multiple cusps Cutter elements for use in rolling cones rock bits are disclosed having a crown that includes multiple, spaced-apart cusps for enhancing formation removal by creating overlapping Hertzian contact zones. The cusps may be partially dome-shaped, berm shaped or otherwis... | 08/16/2005 |
| 6929076 | Bore hole underreamer having extendible cutting arms A bore hole underreamer is provided having a hollow body with a longitudinal axis, which has an external wall, at least two cylindrical bores provided through the external wall and whose axes are transverse to the longitudinal axis. Each of the bores have a cylindri... | 08/16/2005 |
| 6745858 | Adjustable earth boring device An adjustable earth boring device for provides a strong, easy to use, adjustable mount for cutters on earth boring devices. In a preferred embodiment, the device includes a grooved, wedge-shaped pocket and matching cutter segment with means to secure the cutter segm... | 06/08/2004 |
| 6131675 | Combination mill and drill bit A combination milling and drilling bit which can be converted from a first type of cutting operation to a second type of cutting operation by hydraulically moving a plurality of movable blades to extend beyond a plurality of fixed blades. The fixed blades... | 10/17/2000 |
| 5560440 | Bit for subterranean drilling fabricated from separately-formed major components A rotary bit for drilling subterranean formations. The bit includes a separately-fabricated bit body and cutter support structures, the latter of which may be designed as blades, ribs, pads or otherwise, depending upon the bit style. The body and one or m... | 10/01/1996 |
| 5361859 | Expandable gage bit for drilling and method of drilling A drill bit for use with earth drilling equipment, the drill bit having a body and movable cutting members or blades variably positionable between a first position in which the diameter defined by the cutting members is generally equal to or less than the... | 11/08/1994 |
| 5308150 | Down reaming apparatus A down reaming apparatus including a cutterhead body and a plurality of arms radially disposed on the cutterhead body with cutter assemblies on each arm. A first arm has a given length and additional arms each are of different length. Arm extenders having... | 05/03/1994 |
| 5234064 | Roller cutter assembly having adjustable ring cutter spacing A roller cutter assembly comprising a cutter hub adapted for rotation with respect to a rock face and having a peripheral surface with an axially extending width. The first cutter ring is located on the cutter hub. A second cutter ring is also located on ... | 08/10/1993 |
| 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 |
| 5111893 | Device for drilling in and/or lining holes in earth A device for drilling and lining holes in earth bores wherein a casing is intended to be lowered into the bore along with the drilling unit. The drilling unit is mounted on a rotating drill. The drilling unit includes a plurality of cutters which can be a... | 05/12/1992 |
| 5009274 | Laterally adjustable drilling tool A drilling tool is followed by a casing tube (11) down the drilled hole. The mouth of the casing tube (11) centers rotatably a guide member (10) which receives rotation and impact energy via the interior of the casing tube (11). A drill bit (20) consists ... | 04/23/1991 |
| 4819744 | Funnel hole ice auger An ice auger includes a pair of ice boring blades fixedly attached to the bottom of a straight inner auger drive bar. A brace and bit arrangement at the top of the drive bar is for rotating the drive bar and either forcing it down toward the ice to bore a... | 04/11/1989 |
| 4531596 | Tool for boring an enlarged portion within the interior of a hole and a tiltable tool for completing that tool An improved boring tool comprising a longitudinal groove in its shaft and a two-armed tool within the groove is provided for boring an enlargement within a hole. The two-armed tool has a rear actuating arm and a forward cutting arm and is tiltably support... | 07/30/1985 |
| 4456082 | Expandable rock bit This invention relates to large diameter raise bore rock bits. The invention comprises a means in which extensions may be attached to the outer diameter of the body of the rock bit, thus providing a variable diameter raise bore rock bit. The extensions ar... | 06/26/1984 |
| 4448270 | Variable diameter earth boring bit An earth boring bit is shown of the type used to cut a shaft in the earth. The earth boring bit has a central bit body which is adapted to be driven to cut a shaft and which has an outer conical surface thereon. An outer ring segment carried on the centra... | 05/15/1984 |
| 4264246 | Boring tool for boring holes of substantial length The present boring head is constructed for drilling or boring deep holes or bores of substantial axial length whereby so-called veering off from the longitudinal boring axis is to be prevented. For this purpose three cutting members are distributed about ... | 04/28/1981 |
| 4142598 | Two stage large diameter drill bit A large diameter drill bit is disclosed that is capable of drilling various size bores. In the preferred embodiment, the drill functions as a raise bit for enlarging a pilot hole into a larger diameter hole by disintegrating the earth formations surroundi... | 03/06/1979 |
| 4133399 | Boring device A boring device adapted for deep boring wherein the boring head has a plurality of cutting inserts adjustably mounted on the boring head. Axially extending guide plates are mounted on the periphery of the boring head and are substantially equidistantly di... | 01/09/1979 |
| 4100983 | Boring device A boring device adapted for deep well drilling wherein a cutting plate is fixed in operative position in a recess of a boring head by means of a clamping bolt. The cutting plate is reversible and its position in the boring head is adapted to be adjusted i... | 07/18/1978 |
| 4071098 | Cutter mounting extension apparatus The apparatus comprises means for replaceable coupling thereof to a standard raise boring head for extending the effective cutting radius of the head. The apparatus comprises a raise boring head radius extension element which is pinned to struts extending... | 01/31/1978 |
| 4049067 | Cutter mounting extension apparatus The apparatus comprises means for coupling to a standard raise boring head for extending the radius of the head. The apparatus comprises a support which is bolted or welded to a terminal end of the raise boring stem and to the underlying surface of the pr... | 09/20/1977 |
| 4010808 | Expandable raise bit A bit is provided that includes a bit body defining a bit axis of rotation. Primary cutter means are positioned on the bit body for disintegrating the formations out to a first radial distance from said bit axis of rotation. Secondary cutter means are ada... | 03/08/1977 |
| 3989115 | Adjustable gage cutter scraper for tunneling machines An adjustable gage cutter scraper system is provided to clear a path through fallen rock and muck in a tunnel invert. The scraper system protects the gage cutters from recutting or regrinding the rock and muck and thus prevents or retards excessive wear o... | 11/02/1976 |
| 3960218 | Grass-clearing device for lawn-sprinkler heads A grass-clearing device for lawn sprinkler heads, wherein the grass and sod surrounding the in-line, sprinkler head is to be trimmed therefrom, to provide an unobstructed flow of water from the sprinkler head. The device comprises a pair of adjustable, cu... | 06/01/1976 |
