US3802078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting device and method for making same
Assignee: Individual
•
Filing: 1971-06-07
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Granted: 1974-04-09
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Expires: 1991-06-07
Abstract
Abstract A cutting device which may have a fine cutting edge including a metal or alloy blade of the desired sharpened form on which is deposited a hard cutting later of thickness less than one micron, the cutting layer being of hard particles having a Vickers microhardness greater than 1000 kg/mm2 embedded in a codeposited metal or alloy matrix. Methods for producing such cutting devices are also disclosed.
Inventors
- 👤 P Denes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:56
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/58; B26B21/60
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A cutting device comprising: a. a preshaped and sharpened base composed of metal and having an acute angle cutting edge; and b. a composite coating formed on the cutting edge of said base and having a thickness of less than one micron; c. said composite coating comprising hard particles of a size less than 500 Angstrom and having a Vickers micro-hardness greater than 1000 kg/mm2; d. said composite coating further comprising a metal matrix having said hard particles embedded and substantially uniformly distributed therein and being effective to form a finely interwoven structure in which said hard particles are bound together and to said base; e. said metal matrix being of a corrosion resistant metal; f. said hard particles having a volume percentage between 20 and 80 percent of said composite coating.
Claim 2
Dependent Claim
132 words
A cutting device comprising: a. a preshaped and sharpened base composed of metal and having an acute angle cutting edge; and b. a composite coating formed on the cutting edge of said base and having a thickness of less than one micron; c. said composite coating comprising hard particles of a size less than 500 Angstrom and having a Vickers micro-hardness greater than 1000 kg/mm2; d. said composite coating further comprising a metal matrix having said hard particles embedded and substantially uniformly distributed therein and being effective to form a finely interwoven structure in which said hard particles are bound together and to said base; e. said metal matrix being of a corrosion resistant metal; f. said hard particles having a volume percentage between 20 and 80 percent of said composite coating.
Claim 3
Dependent Claim
28 words
A cutting device as defined in claim 1 wherein said hard particles are selected from a group of materials consisting of metal oxides, carbides, borides, nitrides and silicides.
Claim 4
Dependent Claim
14 words
A cutting device as defined in claim 2, said base being of stainless steel.
Claim 5
Dependent Claim
16 words
A cutting device as defined in claim 3, said metal matrix being of a metal alloy.
Claim 6
Dependent Claim
19 words
A cutting device as defined in claim 4, said metal matrix having a diffusion alloy bond to said base.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |