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Match Document Document Title
8002054 Roof drill bit, roof drill bit body and hard cutting insert for roof drill bit  
A roof drill bit has an elongate roof drill bit body, which has a forward end and a rearward end. The roof drill bit body contains a slot at the forward end. The roof drill bit body contains a dust...
7997359 Abrasive wear-resistant hardfacing materials, drill bits and drilling tools including abrasive wear-resistant hardfacing materials  
An abrasive wear-resistant material includes a matrix material and a plurality of −40/+80 ASTM mesh dense sintered carbide pellets. A rotary drill bit having an exterior surface and an abrasive w...
7900721 Hard metal plate for rock drill and rock drill  
In a hard metal plate for insertion in to a seat formed at one end of a drill shaft of a rock drill, comprising a substantially rectangular base shape having two opposed long sides extending in the...
7740089 Drilling tool with a cutting element that is configured as a plate or head  
The invention relates to a drilling tool, especially for percussion drilling, which comprises a cutting element (3) that is configured as a plate (3) or head and that has at least one cutting edge...
7628234 Thermally stable ultra-hard polycrystalline materials and compacts  
Thermally stable ultra-hard polycrystalline materials and compacts comprise an ultra-hard polycrystalline body that wholly or partially comprises one or more thermally stable ultra-hard...
7559382 Hard material head and rotary percussion drill bit  
A hard material head (1) for a rotary percussion drill bit (2) having an elongated shaft (15) including at least three cutting edges (4) distributed circumferentially within a circumscribing...
7510032 Hard composite cutting insert and method of making the same  
A hard composite cutting insert useful for cutting strata such as earth or rock that includes a body that is tough. The body contains a member that is harder than the body (i.e., has a harder...
7455126 Percussive drill bit, drilling system comprising such a drill bit and method of drilling a bore hole  
A percussion drill bit for drilling into a subterranean earth formation. The drill bit has a central longitudinal axis and is operable by applying axial percussive motion along the axis and rotary...
7434635 Tin seat for rock drill insert  
A rock drilling bit includes at least one button having a button sidewall and button bottom, the button sidewall and the button bottom having a button sidewall geometry and a button bottom...
7258180 Rotary hammerdrill bit  
A rotary hammerdrill bit for use with a percussion drilling device or a hammer drilling device, with a shank and a drill head attached to or configured on the shank, wherein a front side pointing...
7225890 Cutting plate for a drill bit  
An auxiliary cutting plate (10) for a multi-cutting plate drill bit (2) has a body (44) for fixing into a slot in the drill bit (2) and a profiled tip (46). The body (44) has a central longitudinal...
7168511 Rotary drill bit having cutting insert with a notch  
A rotary drill bit insert that includes an elongate body that is rotatable about a central axis wherein the elongate body has a pair of symmetrical halves symmetrical about the central axis. The...
7137461 Masonry drilling tool  
A masonry or rock drilling tool suitable for use with a rotary hammer has a drilling head (4, 104) at a forward end of the tool. A forwardly extending cutting plate (6, 106) is fitted or formed on...
7128773 Compositions having enhanced wear resistance  
A composite material includes a double cemented carbide and a coarse grain dopant, wherein the coarse grain is added in an amount sufficient to improve wear resistance of virgin double cemented...
7100714 Mine ceiling drill bit and blade  
A drill bit consists of a bit body having a forward end and a slot in the forward end to hold a hardened cutting blade. The bit body has a table near the center of the blade to reduce the speed at...
7066694 Cutting plate for a drill bit  
A cutting plate (4) has a working end (20) to engage a workpiece and an axis (8) of rotation. A pair of oppositely arranged first faces (34) are inclined axially rearward from the working end (20)...
7051822 Drill bit and drill tip having a tip-locating structure  
A drill bit assembly includes a drill bit having a leading end to which a drill tip is bonded. The drill tip has a front cutting edge, a pair of side cutting edges, a rear end and a pair of...
7001120 Drilling tool  
The invention relates to a drilling tool (36), in particular for working concrete, rock, masonry and suchlike materials, having a single- or multi-edge tool head with at least one cutting body (1)...
6976549 Drilling tool  
The invention relates to a drilling tool (1), in particular for working concrete, rock, masonry and suchlike materials, having a tool head with cutting body (5) which has at least one front rake...
6968912 Drill blades for drill bit  
A drill bit consists of a bit body having a forward end and a slot in the forward end to hold a hardened cutting blade. The blade has a central slot extending into the forward end thereof such that...
6945340 Roof bit and insert assembly  
A center vacuum rotary drill bit including a rotary drill bit body and an insert. The bottom surface of the slot has a projecting key that cooperates with a depression keyway of the insert....
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...
6918455 Drill bit with large inserts  
A percussion drill bit is provided that has at least two different pluralities of inserts extending from the bit head to better match the conditions seen on the bit head during drilling. The...
6915867 Earth penetrating rotary drill bit with helical ports  
A drill bit that has a drill bit body with a side wall and opposite ends. A distal one of the opposite ends of the drill bit body receives a cutting insert. The drill bit body contains at least two...
6886645 Liquid seal for wet roof bit  
Fluid roof bits for mining typically supply high pressure water to a location immediately adjacent the cutting insert of the roof bit to flush debris and cool the cutting insert. The present...
6868924 Rock drill  
A rock drill including a helical shank and a drill head. The drill head has an end face pointing in a feed direction and at least one roof-shaped carbide cutting element on the end face of the rock...
6843334 Drilling head of a rock drill  
A drilling head of a rock drill for use with a hand-held power tool is formed completely of a hard material and includes a main bit (2) and at least one auxiliary bit (3a, 3b). The at least one...
6817429 Roof bit carbide blade  
A roof bit blade insert for use in mining and other associated applications. The blade defines two opposing faces, each having a leading end and a trailing end. The blade defines an indexed...
6782959 Cutter element with non-linear, expanded crest  
A cutter element for a drill bit has a crest that defines a crest line. The crest can be non-rectilinear. The crest line of each cutter element defines an angle with respect to the axis of the...
6742610 Rock drill  
A rock drill (1) for rotary hammers or the like is proposed in which a conveying helix (3) having main and secondary webs (6 to 9) is used. In this case, the convexing helix (3) is run up to the...
6684968 Roof bit body and insert assembly  
A center vacuum rotary drill bit including a rotary drill bit body and an insert. The bottom surface of the slot has a projecting key that cooperates with a depression keyway of the insert....
6668945 Method and apparatus for milling a window in a well casing or liner  
A method and apparatus for milling a window in a downhole structure, such as a casing or a liner, includes a mandrel that supports milling elements arranged in a predetermined pattern. In one...
6655478 Fracture and wear resistant rock bits  
A fracture and wear resistant rock bit is disclosed, which includes a bit body, and at least one roller cone disposed on the bit body adapted such that at least one row of cutting elements disposed...
6655480 Cutting insert for percussion drill bit  
A cutting insert for a gauge row of a percussion drill bit includes a generally cylindrical mounting portion extending along a central axis and a cutting head extending from the mounting portion....
6601660 Cutting structure for roller cone drill bits  
Cutting structures for roller cone drill bits are disclosed. One aspect is a drill bit which includes a bit body, and a plurality of roller cones attached to the bit body and able to rotate with...
6595305 Drill bit, hard member, and bit body  
A rotary drill bit for penetrating earth strata wherein the drill bit includes a drill bit body that has an axial forward end. The drill bit body has a hard insert, which is preferably monolithic,...
6588519 Head for a rock drill  
A rock drill head including a radially extending groove (2a) formed in a head body, a recess (5) formed inside the groove (2a); and at least two, substantially plate-shaped, hard-material inserts...
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...
6484826 Engineered enhanced inserts for rock drilling bits  
Enhanced inserts are formed having a cylindrical grip and a protrusion extending from the grip. An ultra hard material layer is bonded on top of the protrusion. The inserts are mounted on a rock...
6454029 Rotary boring bit and borer  
The invention concerns a rotary boring bit, typically for coal drilling applications. The bit (10) of the invention is in the form of a hardmetal blade and includes a cutting edge (18) having an...
6450273 Drilling tool including drilling head with multiple cutting members separated drilled material grooves  
A drilling tool (1), especially a rock drilling tool, has an axially extending shaft (2) with one end arranged to seat in a chuck of a drilling device and the opposite end securely connected to a...
6446741 Rock drill  
Drills, particularly rock drills, with a chisel shank and a drill head with at least one drill bit or tool bit on a face pointing in a feed direction have the tool bit formed of at least one...
6405813 Rock drill for drilling bores in reinforced concrete  
A drill including a stem (2,22) having at least one discharge groove (3) helically circumscribing the stem (2,22), and a drill head (4,24) provided at the end of the stem (2,22) opposite the end at...
6394199 Non-circular gauge reaming row inserts  
Disclosed is a wear resistant cutting insert for use in rolling cutter drill bits. The insert has a cylindrical shank that is readily fitted in an interfering manner into cylindrical sockets formed...
6374931 Multiple cutter rotary hammer bit  
A drill bit for use in rotary hammer drilling machines to drill holes in rock, masonry and concrete which includes an axially extending shank having a plurality of helical discharge grooves therein...
6367568 Steel tooth cutter element with expanded crest  
A cutter element for a drill bit. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base...
6345940 Cutting tools for drilling concrete, aggregate, masonry or the like materials  
A cutting tool (200, 202) has a longitudinally extending shaft portion (208) with a chucking part (204) and a cutting head (206). A cutting edge (220) is formed on the cutting head (206). The...
6328506 Masonry drill bit  
A masonry drill bit 1 having an active diameter of D, comprising a shaft 3 and a tip 5 for engaging a workpiece, the tip 5 including a central portion 11 extending ahead of an outer portion 13,...
6315064 Rotatable cutting bit assembly with cutting inserts  
A rotatable cutting bit for penetrating an earth formation wherein the rotatable cutting bit includes an elongate bit body having a forward end and a rearward end. The bit body further defines a...
6290008 Inserts for earth-boring bits  
A polycrystalline diamond enhanced insert is disclosed. The insert includes a body portion adapted for attachment to an earth-boring bit and a top portion for contacting an earthen formation. The...
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