US3316626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an airfoil shaped electrode
Assignee: J F FREDERICKS TOOL Co IN
•
Filing: 1964-10-26
•
Granted: 1967-05-02
•
Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Roger J Fredericks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:51
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/04; B23H9/00; B23H9/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/4981
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD FOR MANUFACTURING A HOLLOW SHELL ELECTRODE WITH AN AIRFOIL SECTION FOR ELECTRIC DISCHARGE MACHINING, SAID METHOD COMPRISING THE STEPS OF PROVIDING A TUBE HAVING A CIRCUMFERENTIAL DIMENSION SUBSTANTIALLY EQUAL TO THE DESIRED PERIPHERAL DIMENSION OF SAID AIRFOIL SECTION AND HAVING A WALL THICKNESS SUBSTANTIALLY EQUAL TO THE DESIRED WALL THICKNESS OF SAID HOLLOW ELECTRODE, FLATTENING THE CIRCULAR CROSS-SECTION OF SAID TUBE TO A GENERALLY OBLATE CROSS-SECTION WHICH IS SLIGHTLY THICKER THAN THE DESIRED PROFILE THICKNESS DIMENSION OF SAID AIRFOIL SECTION, FILLING THE INTERIOR OF SAID TUBE WITH WAX, ROUGH FORMING SAID TUBE BY PRESSING TO APPROXIMATE SAID AIRFOIL SECTION WITH SAID WAX THEREIN, REMOVING SAID WAX FROM SAID ELECTRODE SO FORMED, POSITIONING A MANDREL WITHIN SAID ELECTRODE PARALLEL TO THE AXIS THEREOF AND EXTENDING THERETHROUGH, AND FINISH FORMING SAID ELECTRODE BY PRESSING SAID ELECTRODE TO THE CONTOUR OF SAID AIRFOIL SECTION WITH SAID MANDREL THEREIN.
Claim 2
Independent Claim
147 words
A METHOD FOR MANUFACTURING A HOLLOW SHELL ELECTRODE WITH AN AIRFOIL SECTION FOR ELECTRIC DISCHARGE MACHINING, SAID METHOD COMPRISING THE STEPS OF PROVIDING A TUBE HAVING A CIRCUMFERENTIAL DIMENSION SUBSTANTIALLY EQUAL TO THE DESIRED PERIPHERAL DIMENSION OF SAID AIRFOIL SECTION AND HAVING A WALL THICKNESS SUBSTANTIALLY EQUAL TO THE DESIRED WALL THICKNESS OF SAID HOLLOW ELECTRODE, FLATTENING THE CIRCULAR CROSS-SECTION OF SAID TUBE TO A GENERALLY OBLATE CROSS-SECTION WHICH IS SLIGHTLY THICKER THAN THE DESIRED PROFILE THICKNESS DIMENSION OF SAID AIRFOIL SECTION, FILLING THE INTERIOR OF SAID TUBE WITH WAX, ROUGH FORMING SAID TUBE BY PRESSING TO APPROXIMATE SAID AIRFOIL SECTION WITH SAID WAX THEREIN, REMOVING SAID WAX FROM SAID ELECTRODE SO FORMED, POSITIONING A MANDREL WITHIN SAID ELECTRODE PARALLEL TO THE AXIS THEREOF AND EXTENDING THERETHROUGH, AND FINISH FORMING SAID ELECTRODE BY PRESSING SAID ELECTRODE TO THE CONTOUR OF SAID AIRFOIL SECTION WITH SAID MANDREL THEREIN.
References Cited (Backward Citations)
US2300353A
Cited
US3107416A
Cited
US3010353A
Cited
US3052961A
Cited
US3214805A
Cited
US3091023A
Cited
US3247579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |