Auger drill bit

Details Auger drill bit Auger drill bit

1997-08-25

2000-02-15

Pitts, Andrea L.

Cutting by use of rotating axially moving tool

Tool or tool with support

408212, 408225, B23B 5100

Patent

active

060245204

ABSTRACT:
An auger bit for forming bores having a circular cross section in a workpiece is disclosed. The bit has an elongate auger portion, a shank, a lead screw, a chisel blade, a spur blade, and a shearing blade. The elongate auger portion has an elongate shaft with a elongate helical land formed therein defining a flute between adjacent turns on the elongate helical land. The helical land has a lead edge and following portion. The shank is integrally connected to one end of the elongate auger portion and is adapted to engage a drill. The lead screw is integrally connected to the other end of the elongate auger portion and is for engaging the workpiece. The chisel blade extends outwardly from the leading edge of the elongate helical land and is for chipping material from the workpiece. The spur blade extends longitudinally from the elongate helical land in the direction of the lead screw. A cutting edge extends longitudinally from the following portion of the elongate helical land proximate to the leading edge. Preferably the cutting edge is a shearing blade which extends longitudinally into the flute between adjacent turns on the elongate helical land. The shearing blade may be attached between two adjacent turns on the helical land or attached to only one land. Preferably the shearing blade, the chisel blade and the spur blade are removable. Preferably the shearing blade and spur are integrally attached. Alternatively, shearing blade, spur and chisel blade may be integrally attached to form a removable and replaceable multipurpose blade.

REFERENCES:
patent: 450908 (1891-04-01), Brede et al.
patent: 567271 (1896-09-01), Howard, Jr. et al.
patent: 631572 (1899-08-01), Judson
patent: 931593 (1909-08-01), Garner
patent: 1066707 (1913-07-01), Caldwell
patent: 3947143 (1976-03-01), Gulla
patent: 4050841 (1977-09-01), Hildebrandt
patent: 4079766 (1978-03-01), Conley et al.
patent: 4225274 (1980-09-01), Katz
patent: 4244667 (1981-01-01), Timmons
patent: 4625593 (1986-12-01), Schmotzer
patent: 4950111 (1990-08-01), Thomas
patent: 5074722 (1991-12-01), Cochran
patent: 5193951 (1993-03-01), Schimke
patent: 5244319 (1993-09-01), Cochran
Shopping for Drill Bits, Dec. 1994/Jan. 1995, Fine Homebuilding, pp. 70-75.

Affiliated with

Also associated with

Rating

Auger drill bit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Auger drill bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auger drill bit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1900788