Patent US3885637A successfully refreshed from Google Patents.
US3885637A
Expired / Lapsed
US
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Boring tools and method of manufacturing the same
Assignee: Individual
•
Filing: 1974-01-04
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Granted: 1975-05-27
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Expires: 1994-01-04
Abstract
Abstract Boring tools in which the cutting elements defined by coarse abrasive grains are embedded at 1/2-2/3 of the height of the cutting grains in the matrix layer containing embedded fine abrasive grains, while the remaining portion of the grains is located in a metallic layer of the matrix arranged outside over the rock-destroying surface of the tool. The advantage of such boring tools is that their wear resistance is 20-30 percent greater than that of the known boring tools.
Inventors
- 👤 Vladimir Ivanovich Veprintsev
- 👤 Lev Iosifovich Klyachko
- 👤 Nikolai Andreevich Kudrya
- 👤 Evgeny Ivanovich Suslov
- 👤 Gennady Petrovich Grishin
- 👤 Anatoly Vasilievich Kolchin
- 👤 Evgeny Vasilievich Funtikov
- 👤 Vladimir Fedorovich Shpak
- 👤 Vasily Andreevich Barkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; B; B22; B22D; B22D19/00; B22D19/0009
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A boring tool comprising: a body; a rock-destroying member secured to the body; a matrix of said rock-destroying member; a first metallic layer in said matrix arranged over a rockdestroying surface of the rock-destroying member; a second metallic layer in the matrix containing embedded fine abrasive grains and arranged internally relative to the first metallic layer; cutting elements comprising coarse abrasive grains which are located at the boundary of said two layers and penetrate at 1/2 - 2/3 in the matrix layer containing embedded grains, while the remaining portion of the coarse grains are located in the exclusively metallic layer of the matrix.
Claim 2
Dependent Claim
103 words
A boring tool comprising: a body; a rock-destroying member secured to the body; a matrix of said rock-destroying member; a first metallic layer in said matrix arranged over a rockdestroying surface of the rock-destroying member; a second metallic layer in the matrix containing embedded fine abrasive grains and arranged internally relative to the first metallic layer; cutting elements comprising coarse abrasive grains which are located at the boundary of said two layers and penetrate at 1/2 - 2/3 in the matrix layer containing embedded grains, while the remaining portion of the coarse grains are located in the exclusively metallic layer of the matrix.
Claim 3
Dependent Claim
41 words
The tool according to claim 1, wherein the thickness of the first metallic layer of the matrix, which is arranged over the rock-destroying surface of the tool, is substantially equal to the depth of penetration of the coarse abrasive grains therein.
Claim 4
Independent Claim
167 words
A method of manufacturing a boring tool including a body and a rock-destroying member comprising the steps of placing a metallic charge for molding of a matrix in two layers; one layer being formed of an exclusively metallic charge and being so arranged as to form a rock-destroying surface of the rock-destroying member; the other charge layer being of metal and containing embedded fine abrasive grains uniformly distributed over said charge; said second layer being arranged internally relative to said exclusively metallic layer; placing coarse abrasive grains at the boundary between the metallic layer and the layer containing embedded fine abrasive grains in such a manner that the coarse abrasive grains penetrate into the charge layer containing the fine abrasive grains at 1/2 - 2/3 , while the remaining portion thereof is located in said exclusively metallic charge layer; pressing the charge in a mold against the tool body; and impregnating the charge with a metal melt with subsequent curing until solidification and machining of the tool.
Claim 5
Independent Claim
167 words
A method of manufacturing a boring tool including a body and a rock-destroying member comprising the steps of placing a metallic charge for molding of a matrix in two layers; one layer being formed of an exclusively metallic charge and being so arranged as to form a rock-destroying surface of the rock-destroying member; the other charge layer being of metal and containing embedded fine abrasive grains uniformly distributed over said charge; said second layer being arranged internally relative to said exclusively metallic layer; placing coarse abrasive grains at the boundary between the metallic layer and the layer containing embedded fine abrasive grains in such a manner that the coarse abrasive grains penetrate into the charge layer containing the fine abrasive grains at 1/2 - 2/3 , while the remaining portion thereof is located in said exclusively metallic charge layer; pressing the charge in a mold against the tool body; and impregnating the charge with a metal melt with subsequent curing until solidification and machining of the tool.
Claim 6
Dependent Claim
35 words
The method according to claim 3, wherein the thickness of the metallic charge layer forming the rock-destroying surface of the tool is substantially equal to the depth of penetration of the coarse abrasive grains therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |