| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 408214000 | Having central lead-screw | 6 |
| 20080298916 | REPLACEABLE TIP FOR A BIT OR AUGER BIT - Tool elements, such as, bits, auger bits, concrete bits, etc. are provided. The tool elements include a body and a cutting element removably connected to the body. The cutting element may be removably connected to the body in a variety of manners. The body and the cutting element may be made from a similar material or from different materials. The tool element may also include a second cutting element removably connected to the body or to the first cutting element. In some aspects, the second cutting element is a feed screw. In other aspects, the second cutting element is a continuation of the first cutting element. | 12-04-2008 |
| 20090035083 | DOUBLE TIPPED DIAMOND DRILL BIT - The present invention is a drill bit with a generally cylindrical bit body. The body of the drill bit has a starter tip region adapted to be releasably secured to a drill spindle. The starter tip comprises a diamond or diamond coated starter tip. There is a drill tip disposed at an opposite end from the starter tip and extends generally outward. The drill tip has two or more cutting edges with a surface and two or more helical grooves. Each of the cutting edges has a layer of diamond crystals on its surface. | 02-05-2009 |
| 20090116919 | Auger bit including a reamer - Embodiments of the invention comprise an auger bit for use with a power drill including an elongated member including a first end and an opposing second end, a helical surface having a central axis, where the helical surface defines at least one flute, a head portion integrally formed with the first end of the elongated member and including a primary cutting edge adapted to engage and remove material from a workpiece and a secondary cutting edge adapted to engage and remove additional material from the workpiece, a threaded tip integrally formed with the head portion and a shank integrally formed with the second end of the elongated member and adapted to engage the drill. | 05-07-2009 |
| 20110318129 | Auger Bit - An auger bit and a method of manufacturing the auger bit it is described. The auger bit has an axially-elongated shank portion, a tool-engaging portion on a first end of the shank, and a work-entering head portion on a second end of the shank. The machined bit is neutral heat treated and the cutting face is locally hardened by induction heat treating. | 12-29-2011 |
| 20120063859 | Drill Bit - A drill bit for a boring tool comprises a shank configured for engagement with the boring tool and a working tip having a first end attached to the shank and an opposite second end, and a conical helical thread extending substantially continuously from end to end. The thread root may include a rounded portion while the crest may be flat. The configuration of the helical thread, such as the crest width, thread depth, thread angle, cross sectional area and base width are adjusted as a function of the length of the threaded working tip to maximize bending strength and optimize thread wear and operability. | 03-15-2012 |
| 20130189044 | STEP DRILL FOR WOOD - A wood drill bit has a plurality of step sections where each step section has at least one flute that terminates in a cutting edge. The effective diameter of each of the plurality of step sections is different than the diameter of the other of the plurality of step sections such that a single bit may be used to bore holes in wood of different diameters. | 07-25-2013 |
