| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 408213000 | Having axially extending peripheral cutting spur | 7 |
| 20080279647 | SPADE BIT - The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal. | 11-13-2008 |
| 20090097931 | Spade Bit having Threaded Conical Tip Portion - A bit including a shaft defining an axis about which the bit is configured to be rotated. The bit further includes a blade having a first end attached to the shaft and an opposite second end, the blade further having (i) a first blade portion including a first shoulder defining a first cutting edge portion at the second end of the blade, and (ii) a second blade portion including a second shoulder defining a second cutting edge portion at the second end of the blade. The bit additionally includes a frusto-conically-shaped tip portion having an apex and being attached to the second end of the blade. The frusto-conically-shaped tip portion includes threads extending from the apex to a location adjacent to the first cutting edge portion and the second cutting edge portion. | 04-16-2009 |
| 20090116918 | Spade Bit having Reamer Feature - A spade bit includes a shaft defining an axis about which the spade bit is configured to be rotated. The space bit also includes a blade attached to the shaft and having a first paddle portion and a second paddle portion. In addition, the spade bit includes a tip portion attached to the blade and aligned with the axis. The first paddle portion includes (i) a first leading end portion positioned on a first side of the axis and configured to define a first cutting edge portion, and (ii) a first lateral extension portion configured to define a first sloping surface. The first paddle portion defines a first relief space positioned adjacent to both the first sloping portion and the first leading end portion. The second paddle portion includes (i) a second leading end portion positioned on an opposite second side of the axis and configured to define a second cutting edge portion, and (ii) a second lateral extension portion configured to define a second sloping surface. The second paddle portion defines a second relief space positioned adjacent to both the second sloping portion and the second leading end portion. | 05-07-2009 |
| 20100124467 | AUGER BIT WITH INTERLOCKING FEED SCREW AND CUTTING INSERT - An auger bit includes a shaft having a central axis, a cutting insert mounted to said shaft, and a feed screw that is separate from the cutting insert and which is mounted to the shaft. The cutting insert and the feed screw are engaged with each other. A single locking member, such as a set screw, secures the feed screw member to the shaft, and thereby secures the cutting insert to the shaft. If the feed screw or the cutting insert become worn, feed screw or the cutting insert can be replaced. | 05-20-2010 |
| 20110085866 | WOOD BORING BIT - A boring bit includes a shank and a drilling head coupled to the shank. The drilling head includes a center tip and a pair of flanges. Each flange includes a cylindrical sidewall section, a cutting edge extending radially outward from the center tip to the sidewall section, a bottom face extending radially outward from the shank to the sidewall section, a rake face extending axially from the cutting edge to the bottom face, a rearward edge extending radially outward from the shank to the sidewall section and defining a boundary of the bottom face opposite the rake face, a spur extending axially from the sidewall section, and a chip channel defined at least in part by the sidewall section. The sidewall section of each flange extends through a sweep angle from the cutting edge to the rearward edge. The sweep angle is between about 30 degrees and about 60 degrees. | 04-14-2011 |
| 20110150588 | SPADE BIT - The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal. | 06-23-2011 |
| 20150063935 | Drill Bit - A drill bit configured for use with a rotary power tool including a chuck. The drill bit includes a shank including a first end and a second end, and a paddle that extends from the second end of the shank. The paddle includes a first face including a concave portion, a second face opposite the first face and the second face including a convex portion opposite the concave portion, a cutting surface, a cutting edge located at an end of the cutting surface, a relief angle defined by the cutting surface, and an angled rake face adjacent the cutting surface that defines a rake angle that is between about 5 degrees and about 45 degrees. | 03-05-2015 |
