US4266449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making a cutting tool
Assignee: Individual
•
Filing: 1979-10-22
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Granted: 1981-05-12
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Expires: 1999-10-22
Abstract
Abstract A method for making a cutting tool such as a tap, reamer or the like, in which the entire surface of a soft high speed steel blank is coated with a formation of titanium nitride, heat treated, and then finish ground by conventional means to define the cutting edges.
Inventors
- 👤 Robert A. Bielby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:19
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/28; Y; Y10; Y10T; Y10T407/00; Y10T407/27
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
A method for making a cutting tool comprising the steps of: forming a metal cutting tool blank; depositing on the surface of said blank in a vapor deposition chamber a high hardness coating of a first thickness; heat treating the coated blank in a vacuum furnace; and removing metal and a portion of said high hardness coating from said blank to form a cutting edge bordering a portion of said blank in which the high hardness coating of said first thickness remains thereon.
Claim 2
Independent Claim
83 words
A method for making a cutting tool comprising the steps of: forming a metal cutting tool blank; depositing on the surface of said blank in a vapor deposition chamber a high hardness coating of a first thickness; heat treating the coated blank in a vacuum furnace; and removing metal and a portion of said high hardness coating from said blank to form a cutting edge bordering a portion of said blank in which the high hardness coating of said first thickness remains thereon.
Claim 3
Dependent Claim
22 words
A method as defined in claim 1, in which the entire surface of the blank is coated with a high hardness coating.
Claim 4
Dependent Claim
18 words
A method as defined in claim 1, in which the coating is a surface formation of titanium nitride.
Claim 5
Dependent Claim
26 words
A method as defined in claim 1, in which the coating is a formation of titanium nitride deposited on the entire surface of the tool blank.
Claim 6
Dependent Claim
26 words
A method as defined in claim 1, in which the coating is a formation of titanium carbide deposited on the entire surface of the tool blank.
Claim 7
Dependent Claim
26 words
A method as defined in claim 1, in which the coating is a formation of aluminum oxide deposited on the entire surface of the tool blank.
Claim 8
Dependent Claim
25 words
A method as defined in claim 1, in which the coating is a formation of hafnium deposited on the entire surface of the tool blank.
Claim 9
Dependent Claim
17 words
A method as defined in claim 1, in which the blank is formed of a high-speed steel.
Claim 10
Dependent Claim
19 words
A method as defined in claim 1, in which the blank is useful for shaping into a form-relieved tool.
Claim 11
Dependent Claim
31 words
A method as defined in claim 1, in which the coating is deposited in a vapor chamber in which the tool blank is exposed to temperatures of at least 1800° F.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |