US4211294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated diamond drill bit
Assignee: Acker Drill Co Inc
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Filing: 1978-04-21
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Granted: 1980-07-08
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Expires: 1998-04-21
Abstract
Abstract An impregnated diamond drill bit having a crown containing a plurality of diamond particles. The crown is formed from a fused powdered metallic matrix that includes titanium carbide and a nickel-manganese alloy. The diamond particles are dispersed within the metallic matrix which is then fused so as to hold the diamond particles in place. Although the mixture including the nickel-manganese solid solutions has a lower degree of hardness than that of prior impregnated diamond drill bits, the use of the nickel-manganese alloy improves the retention ability of the metallic matrix for securing the diamonds within the crown. A steel shank is attached to the crown.
Inventors
- 👤 Leonid Multakh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:32
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/48; B; B23; B23P; B23P15/00; B23P15/28; B23P5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
An impregnated diamond drill bit comprising: a crown containing diamond particles dispersed within a fused metallic matrix having a hardness of no greater than 10 Rockwell C and containing a metal alloy having a relatively low melting temperature and capable of preparing the surfaces of the diamond particles so that said surfaces have a greater affinity for the metallic matrix and a metal shank attached to said crown, said metal alloy being formed essentially of nickel and manganese so as to give a nickel-manganese alloy.
Claim 2
Dependent Claim
85 words
An impregnated diamond drill bit comprising: a crown containing diamond particles dispersed within a fused metallic matrix having a hardness of no greater than 10 Rockwell C and containing a metal alloy having a relatively low melting temperature and capable of preparing the surfaces of the diamond particles so that said surfaces have a greater affinity for the metallic matrix and a metal shank attached to said crown, said metal alloy being formed essentially of nickel and manganese so as to give a nickel-manganese alloy.
Claim 3
Dependent Claim
99 words
An impregnated diamond drill bit comprising: a crown formed of a fused metallic matrix having a hardness of less than approximately 20 Rockwell C, said metal matrix containing between 15% and 50% of a metal alloy, said alloy being formed essentially of nickel and manganese so as to give a nickel-manganese alloy, said metal alloy being capable of preparing the surfaces of the diamond particles so that said surfaces have a greater affinity for the metallic matrix, said crown having a plurality of diamond particles dispersed within said fused metallic matrix and a shank member attached to said crown.
Claim 4
Dependent Claim
99 words
An impregnated diamond drill bit comprising: a crown formed of a fused metallic matrix having a hardness of less than approximately 20 Rockwell C, said metal matrix containing between 15% and 50% of a metal alloy, said alloy being formed essentially of nickel and manganese so as to give a nickel-manganese alloy, said metal alloy being capable of preparing the surfaces of the diamond particles so that said surfaces have a greater affinity for the metallic matrix, said crown having a plurality of diamond particles dispersed within said fused metallic matrix and a shank member attached to said crown.
Claim 5
Dependent Claim
18 words
An impregnated diamond drill bit as defined in claim 1 wherein said metal alloy is a nickel-manganese alloy.
Claim 6
Dependent Claim
26 words
An impregnated diamond drill bit as defined in claim 1 wherein said metal alloy acts to securely retain said diamond particles within said fused metallic matrix.
Claim 7
Dependent Claim
27 words
An impregnated diamond drill bit as defined in claim 1 or 2 wherein said metallic matrix includes a mixture of titanium carbide, iron and said metal alloy.
Claim 8
Dependent Claim
23 words
An impregnated diamond drill bit as defined in claim 5 wherein said fused metallic matrix has a hardness of approximately 10 Rockwell C.
Claim 9
Dependent Claim
39 words
An impregnated diamond drill bit as defined in claim 5 wherein said fused metallic matrix is formed from a mixture including 15% to 50% by weight of nickel-manganese alloy, 10% to 50% titanium carbide and 20% to 50% iron.
Claim 10
Dependent Claim
29 words
An impregnated diamond drill bit as defined in claim 7 wherein said nickel-manganese alloy is formed from a mixture of 50% to 60% nickel and 40% to 50% manganese.
Claim 11
Dependent Claim
26 words
An impregnated diamond drill bit as defined in claim 8 wherein a majority of said diamond particles are approximately between 40 to 50 mesh in size.
References Cited (Backward Citations)
US2589357A
Cited
US2607676A
Cited
US2712988A
Cited
US2703750A
Cited
US2833638A
Cited
US3372010A
Cited
US3464804A
Cited
US3879901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |