Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A solid wear-resistant sintered metallic carbide insert adapted for forcible insertion into an opening in a working face of a drill bit which comprises a generally polygonal body portion having at least about 12 sides extending between opposite ends thereof, and a head portion on one end of said body portion, the corners formed by said sides being abraded at said ends of said body portion and tapering inwardly towards the end of said body portion opposite to said one end thereof, said body portion being insertable into said working face opening for mounting the body portion therein with said head portion exposed at said working face.
Claim 2
Dependent Claim
107 words
A solid wear-resistant sintered metallic carbide insert adapted for forcible insertion into an opening in a working face of a drill bit which comprises a generally polygonal body portion having at least about 12 sides extending between opposite ends thereof, and a head portion on one end of said body portion, the corners formed by said sides being abraded at said ends of said body portion and tapering inwardly towards the end of said body portion opposite to said one end thereof, said body portion being insertable into said working face opening for mounting the body portion therein with said head portion exposed at said working face.
Claim 3
Dependent Claim
14 words
An insert as defined in claim 1 wherein said metallic carbide comprises tungsten carbide.
Claim 4
Dependent Claim
17 words
An insert as defined in claim 1 wherein said body portion has about 12 to 20 sides.
Claim 5
Dependent Claim
20 words
An insert as defined in claim 1 wherein said head portion has a circular base substantially tangent to said sides.
Claim 6
Dependent Claim
56 words
An insert as defined in claim 1 including a seat portion having a beveled peripheral edge on said opposite end of said body portion, the corners formed by said edge being abraded, and said seat portion being seated on said bit at the base of said working face opening when said body portion is mounted therein.
Claim 7
Dependent Claim
154 words
A solid wear-resistant sintered tungsten carbide insert adapted for forcible insertion into an opening in a working face of a drill bit which comprises a generally polygonal body portion having about 12 to 20 sides extending between opposite ends thereof, a head portion on one end of said body portion, and a seat portion having a beveled peripheral edge on the opposite end of said body portion, the corners formed by said body portion sides being abraded increasingly from about the central region of said body portion to said ends thereof and tapering inwardly towards said opposite end of the body portion, and the corners formed by said seat portion edge being abraded, said body portion being insertable into said working face opening for mounting the body portion therein with said seat portion seated on said bit at the base of said working face opening and said head portion exposed at said working face.
Claim 8
Dependent Claim
154 words
A solid wear-resistant sintered tungsten carbide insert adapted for forcible insertion into an opening in a working face of a drill bit which comprises a generally polygonal body portion having about 12 to 20 sides extending between opposite ends thereof, a head portion on one end of said body portion, and a seat portion having a beveled peripheral edge on the opposite end of said body portion, the corners formed by said body portion sides being abraded increasingly from about the central region of said body portion to said ends thereof and tapering inwardly towards said opposite end of the body portion, and the corners formed by said seat portion edge being abraded, said body portion being insertable into said working face opening for mounting the body portion therein with said seat portion seated on said bit at the base of said working face opening and said head portion exposed at said working face.
Claim 9
Dependent Claim
22 words
An insert as defined in claim 6 wherein said head portion is substantially hemispherical with its base substantially tangent to said sides.
Claim 10
Dependent Claim
51 words
A drill bit comprising a body having a working face provided with a plurality of generally circular insert openings extending inwardly therefrom, and a plurality of inserts a defined in claim 1 mounted in said openings, each insert engaging the wall of the opening in which mounted in an interference fit.
Claim 11
Dependent Claim
51 words
A drill bit comprising a body having a working face provided with a plurality Of generally circular insert openings extending inwardly therefrom, and a plurality of inserts as defined in claim 6 mounted in said openings, each insert engaging the wall of the opening in which mounted in an interference fit.