US3417006A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for electrical machining of metallic workpieces
Assignee: Individual
•
Filing: 1966-01-19
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Granted: 1968-12-17
•
Expires: 1986-01-19
Abstract
No abstract record available.
Inventors
- 👤 Inoue Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
B; B23; B23H; B23H5/00; B23H5/02; B23H5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF ELECTRICALLY REMOVING MATERIAL FROM A CONDUCTIVE WORKPIECE, COMPRISING THE STEPS OF: JUXTAPOSING AN ELECTRODE WITH SAID WORKPIECE TO FORM CONFRONTING SURFACES OF SAID ELECTRODE AND WORKPIECE; SUPPLYING BETWEEN SAID SURFACES A LIQUID MACHINING MEDIUM HAVING A SPECIFIC RESISTIVITY BETWEEN SUBSTANTIALLY 10**-1 AND 10**2 OHM-CM.; AND APPLYING ACROSS SAID SURFACES AN ELECTRIC CURRENT HAVING A PULSATING COMPONENT OF A MAGNITUDE SUFFICIENT TO EFFECT SPARK DISCHARGE BETWEEN SAID SURFACES CAPABLE OF ERODING SAID SURFACE OF SAID WORKPIECE IN A FIRST OPERATION, AND A UNIDIRECTIONAL COMPONENT POLED TO ERODE ELECTROCHEMICALLY SAID SURFACE OF SAID WORKPIECE IN A SECOND OPERATION AT LEAST PARTLY OVERLAPPING SAID FIRST OPERATION.
Claim 2
Independent Claim
106 words
A METHOD OF ELECTRICALLY REMOVING MATERIAL FROM A CONDUCTIVE WORKPIECE, COMPRISING THE STEPS OF: JUXTAPOSING AN ELECTRODE WITH SAID WORKPIECE TO FORM CONFRONTING SURFACES OF SAID ELECTRODE AND WORKPIECE; SUPPLYING BETWEEN SAID SURFACES A LIQUID MACHINING MEDIUM HAVING A SPECIFIC RESISTIVITY BETWEEN SUBSTANTIALLY 10**-1 AND 10**2 OHM-CM.; AND APPLYING ACROSS SAID SURFACES AN ELECTRIC CURRENT HAVING A PULSATING COMPONENT OF A MAGNITUDE SUFFICIENT TO EFFECT SPARK DISCHARGE BETWEEN SAID SURFACES CAPABLE OF ERODING SAID SURFACE OF SAID WORKPIECE IN A FIRST OPERATION, AND A UNIDIRECTIONAL COMPONENT POLED TO ERODE ELECTROCHEMICALLY SAID SURFACE OF SAID WORKPIECE IN A SECOND OPERATION AT LEAST PARTLY OVERLAPPING SAID FIRST OPERATION.
References Cited (Backward Citations)
US3223603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |