Spade-type boring bit having chamfered corner portions

Abstract

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.

Claims

The ornamental design for a spade-type boring bit having chamfered corner portions, as shown and described.