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| Number | Title | Issue Date |
| 7228922 | Drill bit A drill bit has a pair of cutting teeth with cutting elements extending from a cutting end portion of the drill bit. Each cutting tooth extends radially, outwardly parallel to a longitudinal axis of the drill steel. The cutting teeth are juxtaposed with one another ... | 06/12/2007 |
| 7147414 | Spur point drill insert A cutting tool insert having a specialized spur point geometry at the center of the insert. The insert comprises a spur point cutting portion and a blade cutting portion wherein the spur point provides stability by providing a spot and allowing a flexible workpiece ... | 12/12/2006 |
| 7140814 | Spade-type drill bit having helical configuration A spade bit including a longitudinally extending shaft having a cutting member located at a distal end thereof. The cutting member comprises a pair of helically shaped, opposed blades joined along the longitudinal axis of the shaft and an axially extending pilot spu... | 11/28/2006 |
| 7125210 | Face milling cutter Face milling cutter with a shaft section and a tool section, whereby the front end of the tool section has at least one flat, arched, lower cutting edge, a rounded corner cutting edge, and a peripheral cutting edge, whereby the lower cutting edge has a radius r1 | 10/24/2006 |
| 7104737 | Pipe beveling tool and method A hand-held pipe beveling tool makes the job of manually beveling the ends of plastic pipe very simple and easy to perform. The pipe beveling tool includes a frame that defines an opening for receiving the end of a pipe. One or more pipe forming members are coupled ... | 09/12/2006 |
| 7097396 | Drill bit An object of the present invention is to provide a drill bit which is simple in design, high in rigidity, and superior in durability and whose drilling function is in no way inferior to that of conventional drilling bits. To this end, in a drill bit comprising a cut... | 08/29/2006 |
| 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) in an axial plane intersecting sai... | 06/27/2006 |
| 7044695 | Milling tool A milling cutter having a pair of clamping components mounted on a tool holder to form a slot for receiving a cutting insert. One of the clamping components forms an integral extension of the tool holder's shank. The two clamping components are fastened together by ... | 05/16/2006 |
| 6957937 | Spade bits with angled sides A spade drill bit has a shaft and a spade head portion arranged on the shaft. The head portion has a rearward facing bottom edge, two longitudinal sides and a forward facing cutting edge. The cutting edge has a pointed, generally triangularly shaped tip and outer en... | 10/25/2005 |
| 6929433 | Drill and surface insensitive starting drill for difficult materials and deep holes A fluteless pyramid point drill for spotting holes for drills having an included angle from 90-160°. The preferred tool is double ended. Another embodiment features the pyramid point on the back end of a penetrating drill. An enhanced pyramid point geometry enables... | 08/16/2005 |
| 6902359 | Drill insert with controlled contact clearance A cutting tool insert having a controlled contact clearance behind the cutting edge which limits flank wear and allows more coolant near the cutting edge further allowing an increase in surface speed, feed rates, and tool life. The controlled contact clearance surfa... | 06/07/2005 |
| 6629805 | Hard metal drill bit for use on a drill The invention concerns a hard-metal cutting tip for use on a drill, particularly on a rock or concrete drill, including a drill point (3) extending through an axis of rotation of the drill, primary cutting edges (6) that slope downwardly on both sides, ea... | 10/07/2003 |
| 6371702 | Spade blade drill and method of making A spade blade drill having blended open notch forms on either side of an apex. The notches transition into elliptical flutes which extend outwardly toward sides of the insert. The elliptical flute profiles inhibit chip curling and packing. The sides incor... | 04/16/2002 |
| 6312432 | Bone drill A bone drill extending along an axis has (1) a stabilizing point with first and second cutting edges which extend to a tip, conical wall sections and flutes on opposite sides of each of the first and second cutting edges and (2) first and second lands ext... | 11/06/2001 |
| 6227774 | Spade drill bit A spade drill bit for use in association with a drill having a direction of rotation includes an elongate shank, a spade portion and a center spur. The elongate shank portion has a central longitudinal axis and one end adapted to engage the drill. The spa... | 05/08/2001 |
| 6095723 | Engraving tool and method for forming An engraving tool includes an end portion extending to a tip, a pair of flutes in the end portion and wall sections between the flutes. The wall sections are ground in the area of the tip to form surfaces having cutting edges and facets disposed at specif... | 08/01/2000 |
| 5964555 | Milling tool and cutter head therefor A tool for rotary chip removal machining includes a cutting head, a retention element and a shank. The cutting head and the retention element comprise overlapping hooks for mounting the cutting head in the shank. The cutting head comprises two integral ma... | 10/12/1999 |
| 5893688 | Masonry drill bit A masonry drill bit having an improved insert geometry, insert orientation, and interface clearance for providing improved drill speed and penetration rate. The drill bit is adapted for use in drilling masonry or other hard, brittle material. The drill bi... | 04/13/1999 |
| 5882161 | Self-drilling and thread-forming screw having a flow-forming section A self-drilling and thread-forming screw comprises a threaded shank, a drilling section arranged in front of the shank and having a uniform diameter, and a thread-free flow-forming section widening conically between the drilling section and the shank. The... | 03/16/1999 |
| 5842267 | Method and apparatus for forming parts of a predetermined shape from a continuous stock material The present invention provides a method and apparatus for forming a plurality of parts, such as spade-type boring bits, from a continuous stock material. Thus, the various steps of the forming method of the present invention can be performed to predetermi... | 12/01/1998 |
| 5827021 | Releasable tool-holder mount for machining spindle A driven part of a tool is secured to a drive part of a drive spindle rotatable about an axis by a mount having a tubular extension projecting axially forward from one of the parts and formed centered on the axis with a radially inwardly projecting collar... | 10/27/1998 |
| 5827019 | Self-calibrating countersink tool A self-calibrating countersink tool includes a reusable insert-holder with an axis-defining shank portion and an insert-receiving notch disposed at one end of the holder. The tool also includes at least one selectively attachable insert which is sized and... | 10/27/1998 |
| 5700113 | Spade-type boring bit and an associated method and apparatus for forming metallic parts The spade-type boring bit includes an elongate shank defining a central longitudinal axis and a blade portion joined to one end of the shank and including a pair of generally flat side segments extending laterally from the central longitudinal axis. Each ... | 12/23/1997 |
| 5697738 | Spade-type boring bit having chamfered corner portions The spade-type boring bit includes an elongate shank defining a central longitudinal axis and a blade portion joined to one end of the shank. The blade portion includes a pair of generally flat side segments extending laterally from the central longitudin... | 12/16/1997 |
| 5653627 | Flat diamond drill A diamond drill consists of a core and a pair of abrasive diamond tips which are joined to constitute a diamond tip and core assembly in the form of a flat plate. The diamond tips have chamfering sections for providing a cutting blade of a diameter smalle... | 08/05/1997 |
| 5632576 | Cutting plate for a ball head miller A cutting plate for a ball-head finish miller has a support body of hard metal centered on an axis and having a pair of oppositely directed and symmetrically oriented faces each formed with a respective substantially circularly segmental recess of a prede... | 05/27/1997 |
| 5354155 | Drill and reamer for composite material A diamond coated drill bit capable of drilling small holes and then reaming the holes to their correct size. The tapered tip of the drill bit has a coarse diamond grit coating which enables it to initiate a hole. The drill bit then gradually grinds the ho... | 10/11/1994 |
| 5221166 | Spade-type drill bit apparatus and method A spade-type drill bit is disclosed having a shank portion and a spade bit portion extending from the shank portion. The spade bit portion includes a spade portion with a planar region, and a center tip concentric with a longitudinal axis and extending fr... | 06/22/1993 |
| 5145018 | Drill bit for drilling along an arcuate path A drill bit for drilling holes around the corner of a workpiece is provided with a single rounded continuous cutting edge with radiused upper and lower corners to permit free rotation of the cutting head as it is urged along an arcuate path. The bit is of... | 09/08/1992 |
| 5094572 | Spade drill for hard material A flat drill for boring holes through hard metals and high heat resistance materials such as hard metal and fiberglass. The flute or fluid portion forms a spade with slightly cylindrically concave faces which tend to distally converge. The cutting edges a... | 03/10/1992 |
| 5055105 | Bone drill bit A bone drill bit for drilling a hole through bone, cartilage and/or other soft tissue, and the like includes an elongate cylindrical shaft having a pointed tip at one end and a shank at the other end which is adapted to be received in a surgical drilling ... | 10/08/1991 |
| 5000630 | Bit for forming holes in composite materials A bit (12) has a triangular drill portion (14), a frustoconical grinder portion (24), and a cylindrical reamer portion (28). The drill portion (14) has three longitudinal cutting edges (16) that define the angles of its triangular cross section. The grind... | 03/19/1991 |
| 4906146 | Axially self-aligning drill bit A drill bit having an elongated, stiffly flexible shank and integral, hardened, enlarged cutting head and tip is adapted to maintain a penetration angle through a plurality of spaced wooden objects while being rotatably driven by a drill. The tip of the d... | 03/06/1990 |
| 4891887 | Hand held drill drive There is provided a hand held and hand operated drill for installing ceiling hooks or other mounting apparatus to a ceiling constructed of plasterboard. The present device collects the falling material cut away by the drilling process in a collection cup ... | 01/09/1990 |
| 4793756 | Tapping screw A tapping screw includes a screw head, a self-tapping thread portion and a drilling point. The drilling point has a pair of approximately axially extending flutes which are located diametrically opposite each other relative to the shank axis and include c... | 12/27/1988 |
| 4720219 | Reboring tool The invention provides a specialty tool useful for cleaning out broken off or cut off plastic pipe and glue in plastic fittings and plastic couplers. An arbor for use with a manual or electrical operated drill is provided with a smooth portion and a threa... | 01/19/1988 |
| 4679968 | Indexable cutter insert A cutter insert of the indexable type for a rotary cutter includes a body of a plate of a generally circular shape and having three notches of a V-shape formed in a circumferential face of the body in equally circumferentially spaced relation, each V-shap... | 07/14/1987 |
| 4655661 | Self-cutting fast construction screw A self-cutting fast construction screw for the fastening of fiber plates to a metal substructure carries on the screw shaft at least one turn of a thread. The screw core passes into a conical drill point. On the conical drill point two cutting edges are a... | 04/07/1987 |
| 4599024 | Entering end portion of drill screw A drill screw having an integral driving shank, head, and entering end portion. The shank has formed on it thread convolutions of uniform outer and root diameters. The entering end portion has a cylindrical portion coaxial with the shank provided with two... | 07/08/1986 |
| 4594034 | Multigroove drill bit with angled frontal ridges A drill bit of the multigroove type has a shaft with at least three flutes forming respective lateral cutting edges and as many generally radial frontal ridges, one of them extending to or possibly beyond the shaft axis while the others terminate short of... | 06/10/1986 |
