Patent US3642601A successfully refreshed from Google Patents.
US3642601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for processing a piece of work by electric current
Assignee: Individual
•
Filing: 1969-12-03
•
Granted: 1972-02-15
•
Expires: 1989-12-03
Abstract
Abstract A device for processing a workpiece by electric current, comprising an electrode carried by an electrode holder, and a work holder holding the work stationary. The electrode holder moves the electrode relative to the workpiece, while providing electric current therethrough, preferably in three directions. The electrode holder also moves the electrode relative to the holder itself, so as to bring fresh portions of the electrode into operative contact with the work. For electrolytic processing, the electrode includes a means for continuously ejecting electrolyte to the working area.
Inventors
- 👤 Iwao Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:12
CPC Classifications
B; B23; B23H; B23H1/00; B23H9/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
An electric discharge machining device comprising a ringshaped electrode, means for stationarily holding a workpiece, means for displaceably holding said electrode in a position in which a circumferential surface of said electrode faces the workpiece for machining the same, means for moving said electrode circumferentially in the holding means therefor, and means for moving the electrode holding means relative to said workpiece.
Claim 2
Dependent Claim
62 words
An electric discharge machining device comprising a ringshaped electrode, means for stationarily holding a workpiece, means for displaceably holding said electrode in a position in which a circumferential surface of said electrode faces the workpiece for machining the same, means for moving said electrode circumferentially in the holding means therefor, and means for moving the electrode holding means relative to said workpiece.
Claim 3
Dependent Claim
55 words
A device as claimed in claim 1, wherein said electrode comprises an endlessly connected wire, said means for holding the electrode comprising a holder block member and at least three rolls respectively journaled on said block member for rotation, said rolls being arranged to hold the electrode at a circumferential inner and outer surface thereof.
Claim 4
Dependent Claim
111 words
A device as claimed in claim 2, in which said rolls are three in number, one of which is journaled on said block member so as to abut the circumferential inner surface of the electrode ring at the highest level thereof, the other two rolls being journaled on said block member so as to form an equilateral triangle with said one roll and abut the circumferential outer surface of the electrode ring for holding the ring-shaped electrode therebetween, the latter two rolls being raisable for removing the electrode, said means for moving the electrode comprising driving means connected to one of said latter two rolls for circumferentially moving the ring-shaped electrode.
Claim 5
Dependent Claim
37 words
A device as claimed in claim 1, wherein said electrode comprises a ring-shaped guide member made of an electrically conductive material and an electrically conductive wire extended over the circumferential outer surface of said ring-shaped guide member.
Claim 6
Dependent Claim
97 words
A device as claimed in claim 4, in which said ring-shaped guide member is circular and formed by an endlessly connected wire, which is held by the holding means, the latter comprising a block member and at least three rolls respectively journaled on said block member for rotation, said rolls being arranged to hold said ring-shaped guide member at a circumferential inner and outer surface thereof, said outer surface being provided with a circumferential groove in which said conductive wire extends so as to be moved in either direction accompanied by circumferential movement of said Guide member.
Claim 7
Dependent Claim
57 words
A device as claimed in claim 4, in which said ring-shaped guide member is noncircular and formed by a body which is fixedly held by the holding means, said guide member having an outer surface provided with a circumferential groove in which said conductive wire extends so as to be slidingly moved thereover by said moving means.
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |