Square drill bit

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Description

FIG. 1 is a perspective view of a square drill bit according to the present invention;

FIG. 2 is a top plan view of the square drill bit of FIG. 1;

FIG. 3 is a front view of the square drill bit of FIG. 1;

FIG. 4 is a back view of the square drill bit of FIG. 1;

FIG. 5 is a left side view of the square drill bit of FIG. 1;

FIG. 6 is a right side view of the square drill bit of FIG. 1; and,

FIG. 7 is a perspective view of the driver drill bit of FIG. 1 in co-operation with a crown bit, wherein the broken lines illustrate components that form no part of the design.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design.

Claims

The ornamental design for a square drill bit, as shown and described.

Referenced Cited
U.S. Patent Documents
3870114 March 1975 Pulk et al.
4765416 August 23, 1988 Bjerking et al.
5259469 November 9, 1993 Stjernstrom et al.
5435401 July 25, 1995 Hedlund et al.
5542483 August 6, 1996 Edman
5590726 January 7, 1997 Jarvela et al.
5839519 November 24, 1998 Spedale, Jr.
5921332 July 13, 1999 Spedale, Jr.
5934394 August 10, 1999 Fareham
5957224 September 28, 1999 Ilomaki
6021856 February 8, 2000 Pascale
6076618 June 20, 2000 .ANG.sberg
6102141 August 15, 2000 Engstrom et al.
6112835 September 5, 2000 Grafe et al.
6182776 February 6, 2001 Asberg
6658968 December 9, 2003 Linden et al.
Foreign Patent Documents
0 358 786 March 1990 EP
Other references
  • Concentrix Overburden Drilling System.
  • Outils de forage Sandvik Coromant TUBEX.
  • Centrex.
  • Stratex Drill Systems.
  • Symmetrix For drilling of tube umbrella.
Patent History
Patent number: D496948
Type: Grant
Filed: Jun 12, 2003
Date of Patent: Oct 5, 2004
Inventors: Luc Charland (Sherbrooke, Quebec), Roger Charland (Sherbrooke, Quebec)
Primary Examiner: Antoine D. Davis
Application Number: 29/183,431
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)
International Classification: 1509;