Spade-type boring bit having chamfered corner portions

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Description

FIG. 1 is a front perspective view of a first embodiment of a spade-type boring bit having chamfered corner portions embodying our new design;

FIG. 2 is a rear elevational view thereof, taken from the side opposite that illustrated in FIG. 1;

FIG. 3 is a side elevational view thereof, taken from the side opposite that illustrated in FIG. 1;

FIG. 4 is a slightly enlarged top plan view thereof;

FIG. 5 is a slightly enlarged bottom plan view thereof;

FIG. 6 is a front perspective view of a second embodiment of our new design;

FIG. 7 is a rear elevational view thereof, taken from the side opposite that illustrated in FIG. 6;

FIG. 8 is a side elevational view thereof, taken from the side opposite that illustrated in FIG. 6;

FIG. 9 is a slightly enlarged top plan view thereof; and,

FIG. 10 is a slightly enlarged bottom plan view thereof.

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

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Patent History
Patent number: D394663
Type: Grant
Filed: Mar 25, 1996
Date of Patent: May 26, 1998
Assignee: Black & Decker Inc. (Newark, DE)
Inventors: Paul Andrew Stone (Glen Rock, PA), Rickey James Thomas (Lineboro, MD), Chris McKenna (Baltimore, MD), Timothy T. McKenzie (Baltimore, MD), Richard Alan Adams (Timonium, MD)
Primary Examiner: Antoine Duval Davis
Law Firm: The Bell Seltzer Intellectual Property Law Group of Alston & Bird LLP
Application Number: 0/52,134
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)
International Classification: 1509;