Spade-type boring bit having chamfered corner portions
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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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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
International Classification: 1509;