US4132038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting master and method of making cutting master for erosion machining
Assignee: EDMUSA Inc A CORP OF MI
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Filing: 1977-02-18
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Granted: 1979-01-02
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Expires: 1997-02-18
Abstract
Abstract A cutting master for total form abrasion machining a predetermined shape in a friable material including a body having a surface which is substantially the mirror image of a shape to be machined by abrasion, which surface is abrasive, is different in size from the shape to be abrasion machined by a predetermined amount, and includes a flat portion having a dimension related to the difference in size between the predetermined shape and the abrasive surface.
Inventors
- 👤 Thomas J. O'Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:58
CPC Classifications
B; B24; B24D; B24D7/00; B24D7/18; B24D18/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A cutting master for total form abrasion machining of a predetermined form in carbon or the like comprising a body portion having a surface which is substantially the mirror image shape of the form to be abrasion machined and different in size therefrom in at least two mutually perpendicular dimensions by a predeterminded amount, which surface includes a flat portion at the center thereof that extends in the two mutually perpendicular dimensions substantially the same distance the abrasive surface of the cutting master is different in size from the form to be machined and which surface is abrasive.
Claim 2
Dependent Claim
98 words
A cutting master for total form abrasion machining of a predetermined form in carbon or the like comprising a body portion having a surface which is substantially the mirror image shape of the form to be abrasion machined and different in size therefrom in at least two mutually perpendicular dimensions by a predeterminded amount, which surface includes a flat portion at the center thereof that extends in the two mutually perpendicular dimensions substantially the same distance the abrasive surface of the cutting master is different in size from the form to be machined and which surface is abrasive.
Claim 3
Dependent Claim
37 words
Structure as set forth in claim 1 wherein the cutting master is formed of a plurality of small diameter parallel rods in linear contact having a binding material therebetween, the ends of which form the abrasive surface
Claim 4
Independent Claim
91 words
The method of forming a cutting master for total form abrasion machining of a predetermined form in carbon or the like comprising producing a surface on a body of rigid material which is substantially the mirror image of the predetermined form and different in size therefrom in at least two mutually perpendicular dimensions by a predetermined amount, producing a flat area on the abrasive surface of the cutting master at the center thereof which is equal to the predetermined amount in the two mutually perpendicular directions and making the surface abrasive.
Claim 5
Independent Claim
91 words
The method of forming a cutting master for total form abrasion machining of a predetermined form in carbon or the like comprising producing a surface on a body of rigid material which is substantially the mirror image of the predetermined form and different in size therefrom in at least two mutually perpendicular dimensions by a predetermined amount, producing a flat area on the abrasive surface of the cutting master at the center thereof which is equal to the predetermined amount in the two mutually perpendicular directions and making the surface abrasive.
Claim 6
Dependent Claim
49 words
The method as set forth in claim 3 wherein the cutting master is formed of a plurality of parallel rods of small diameter similar to the form to be total form machined and different in size therefrom by a predetermined amount and secured in position by a settable binder.
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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) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |