US3960518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a cutting tool
Assignee: Individual
•
Filing: 1974-12-30
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Granted: 1976-06-01
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Expires: 1994-12-30
Abstract
Abstract A cutting tool is disclosed comprising a plurality of blocks of composite, comminuted abrasive in a bonding matrix, connected to a metallic substrate by a braze comprising a layer of an elastically pliant metal having high thermal conductivity sandwiched between a metallic material which has a melting point below the melting point of both the matrix and the metallic substrate. The tool may be formed into a band saw and is especially useful for cutting large blocks of minerals such as granite.
Inventors
- 👤 George H. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
B; B23; B23D; B23D61/00; B23D61/18; B23D61/185
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A method of forming a flexible, endless wire saw which has distributed on its cutting surface a plurality of spaced-apart blocks of composite material formed of comminuted abrasive in a bonding matrix comprising the step of placing under pressure and between said blocks and said surface, a braze comprising a metallic copper-containing layer sandwiched between metallic silver-containing layers, heating said braze to melt said silver-containing layers, and cooling said melted layers to hardness.
Claim 2
Independent Claim
73 words
A method of forming a flexible, endless wire saw which has distributed on its cutting surface a plurality of spaced-apart blocks of composite material formed of comminuted abrasive in a bonding matrix comprising the step of placing under pressure and between said blocks and said surface, a braze comprising a metallic copper-containing layer sandwiched between metallic silver-containing layers, heating said braze to melt said silver-containing layers, and cooling said melted layers to hardness.
Claim 3
Dependent Claim
17 words
A method as defined in claim 1 wherein said blocks are formed by sintering said bonding matrix.
Claim 4
Dependent Claim
22 words
A method as defined in claim 1 including the step of applying said metallic layers to said substrate in their layered relationship.
Claim 5
Dependent Claim
19 words
A method as defined in claim 2 wherein said bonding matrix is sintered simultaneously with heating of said braze.
Claim 6
Dependent Claim
23 words
A method as defined in claim 4 comprising passing an electrical current through said metallic substrate to heat said layers to brazing temperature.
References Cited (Backward Citations)
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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) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |