US4627503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple layer polycrystalline diamond compact
Assignee: SII MegaDiamond Inc
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Filing: 1983-08-12
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Granted: 1986-12-09
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Expires: 2003-08-12
Abstract
Abstract A polycrystalline diamond and metal element for use as a cutting element for drilling holes or similar uses. The cutting element comprises a polycrystalline diamond center portion and at least one metal side portion. The metal side portion is made from a soft metal having a Young's Modulus less than approximately 45×10 6 psi and is selected from a group comprising cobalt, nickel, iron, copper, silver, gold, platinum, palladium and alloys of these metals and intermetallic compounds containing these metals. Since the metal portion is sufficiently yielding the internal stresses formed in the polycrystalline diamond/metal bond during cooling and subsequent attachment to a tool body are signficantly reduced. The reduction the stress in the polycrystalline diamond/metal bond reduces fracturing in the diamond or metal and delamination of the polycrystalline diamond/metal interface during attachment to the tool and during use.
Inventors
- 👤 M. Duane Horton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:06
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/0006; C; C22; C22C; C22C26/00; E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; B23B2226/00; B23B2226/12; B23B2226/125; B23B2226/31; B23B2226/315; B23B2228/00; B23B2228/28; B23B2240/00; B23B2240/08; B23B2251/00; B23B2251/50
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
62 words
A cutting element having a center layer of polycrystalline material, an exposed side layer said side layer being directly bonded to the polycrystalline material layer without an intervening layer, and an exposed opposite side layer of material having a Young's Modulus less than approximately 45×10 6 psi said opposite side layer being directly to the polycrystalline material layer without an intervening layer.
Claim 2
Dependent Claim
62 words
A cutting element having a center layer of polycrystalline material, an exposed side layer said side layer being directly bonded to the polycrystalline material layer without an intervening layer, and an exposed opposite side layer of material having a Young's Modulus less than approximately 45×10 6 psi said opposite side layer being directly to the polycrystalline material layer without an intervening layer.
Claim 3
Dependent Claim
16 words
A cutting element as set forth in claim 1 wherein said side layer comprises cemented carbide.
Claim 4
Dependent Claim
42 words
A cutting element as set forth in claim 2 wherein said material of said opposite side layer is selected from the group consisting of cobalt, nickel, iron, copper, silver, gold, platinum, palladium, alloys of said metals and intermetallic compounds containing said metals.
Claim 5
Dependent Claim
42 words
A cutting element as set forth in claim 1 wherein said material of said opposite side layer is selected from the group consisting of cobalt, nickel, iron, copper, silver, gold, platinum, palladium, alloys of said metals and intermetallic compounds containing said metals.
Claim 6
Dependent Claim
13 words
A cutting element as in claim 4 wherein said side layer comprises tungsten.
Claim 7
Dependent Claim
13 words
A cutting element as in claim 1 wherein said side layer comprises tungsten.
Claim 8
Dependent Claim
77 words
A cutting element having a center layer of polycrystalline material, an exposed side layer of material having a Young's Modulus less than approximately 45×10 6 psi said side layer being directly bonded to the polycrystalline material layer without an intervening layer, and an exposed opposite side layer of material also having a Young's Modulus less than approximately 45×10 6 psi and said opposite side layer also being directly to the polycrystalline material layer without an intervening layer.
Claim 9
Dependent Claim
77 words
A cutting element having a center layer of polycrystalline material, an exposed side layer of material having a Young's Modulus less than approximately 45×10 6 psi said side layer being directly bonded to the polycrystalline material layer without an intervening layer, and an exposed opposite side layer of material also having a Young's Modulus less than approximately 45×10 6 psi and said opposite side layer also being directly to the polycrystalline material layer without an intervening layer.
Claim 10
Dependent Claim
44 words
A cutting element as set forth in claim 7 wherein said material of each of said exposed layers is independently selected from the group consisting of cobalt, nickel, iron, copper, silver, gold, platinum, palladium, alloys of said metals and intermetallic compounds containing said metals.
Claim 11
Dependent Claim
101 words
A rotary bit having a shaft defining an axis of rotation, and a cutting element connected to one end of said shaft, said cutting element comprising: a polycrystalline material center layer extending through and disposed symmetrically about said axis, and forming a plurality of cutting edges; a side layer of material having a high Young's Modulus and being directly bonded without an intervening layer to said polycrystalline material center layer; and, an opposite side layer of material having a Young's Modulus less than approximately 45×10 6 psi and being directly bonded without an intervening layer to said polycrystalline material center layer.
Claim 12
Dependent Claim
101 words
A rotary bit having a shaft defining an axis of rotation, and a cutting element connected to one end of said shaft, said cutting element comprising: a polycrystalline material center layer extending through and disposed symmetrically about said axis, and forming a plurality of cutting edges; a side layer of material having a high Young's Modulus and being directly bonded without an intervening layer to said polycrystalline material center layer; and, an opposite side layer of material having a Young's Modulus less than approximately 45×10 6 psi and being directly bonded without an intervening layer to said polycrystalline material center layer.
Claim 13
Dependent Claim
16 words
A rotary bit as set forth in claim 9 wherein said side layer comprises cemented carbide.
Claim 14
Dependent Claim
39 words
A rotary bit as set forth in claim 10 wherein said opposite side layer is selected from the group consisting of cobalt, nickel, iron, copper, silver, gold, platinum, palladium, alloys of said metals and intermetallic compounds containing said metals.
Claim 15
Dependent Claim
41 words
A rotary bit as set forth in claim 9 wherein said material of said opposite side layer is selected from the group cobalt, nickel, iron, copper, silver, gold, platinum, palladium and alloys of said metals and intermetallic compounds containing said metals.
Claim 16
Dependent Claim
13 words
A cutting element as in claim 12 wherein said side layer comprises tungsten.
Claim 17
Dependent Claim
13 words
A cutting element as in claim 9 wherein said side layer comprises tungsten.
Claim 18
Dependent Claim
105 words
A rotary bit having a shaft defining an axis of rotation, and a cutting element connected to one end of said shaft, said cutting element comprising: a polycrystalline material center layer extending through and disposed symmetrically about said axis, and forming a plurality of cutting edges; a side layer of material having a Young's Modulus less than approximately 45×10 6 and being directly bonded without an intervening layer to said polycrystalline material center layer; and, an opposite side layer of material having a Young's Modulus less than approximately 45×10 6 psi and being directly bonded without an intervening layer to said polycrystalline material center layer.
Claim 19
Dependent Claim
105 words
A rotary bit having a shaft defining an axis of rotation, and a cutting element connected to one end of said shaft, said cutting element comprising: a polycrystalline material center layer extending through and disposed symmetrically about said axis, and forming a plurality of cutting edges; a side layer of material having a Young's Modulus less than approximately 45×10 6 and being directly bonded without an intervening layer to said polycrystalline material center layer; and, an opposite side layer of material having a Young's Modulus less than approximately 45×10 6 psi and being directly bonded without an intervening layer to said polycrystalline material center layer.
Claim 20
Dependent Claim
36 words
A rotary bit as set forth in claim 15 wherein said side layer is selected from the group cobalt, nickel, iron, copper, silver, gold, platinum, palladium, alloys of said metals and intermetallic compounds containing said metals.
Claim 21
Dependent Claim
38 words
A rotary bit as set forth in claim 16 wherein said opposite layer is selected from the group consisting of colbalt, nickel, iron, copper, silver, gold, platinum, palladium, alloys of said metals and intermetallic compounds containing said metals.
References Cited (Backward Citations)
US3745623A
Cited
US4109737A
Cited
US4219339A
Cited
US4229186A
Cited
US4156329A
Cited
US4128136A
Cited
US4333540A
Cited
US4255165A
Cited
US4339009A
Cited
US4252102A
Cited
US4330044A
Cited
US4527643A
Cited
US4499958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |