Patent DE873776C successfully refreshed from Google Patents.
Patent US3862391A successfully refreshed from Google Patents.
US3862391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for removing material from a workpiece
Assignee: Inter-Probe Inc
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Filing: 1973-12-20
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Granted: 1975-01-21
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Expires: 1993-12-20
Abstract
Abstract Method and apparatus for removing material from an electrically conductive workpiece, including a material removal tool mounted adjacent to and in material removal relation with a rotatably supported and driven workpiece, a probe electrically insulated from the tool and workpiece having a tip end spaced adjacent to the workpiece and tool but closer to the workpiece than the tool, and a high-voltage D.C. source connected between the probe and the tool and producing a potential level sufficient to create an electrical arc between the tip end of the probe and the workpiece.
Inventors
- 👤 Sr Oscar C Blomgren
- 👤 Jr Oscar C Blomgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:55
CPC Classifications
B; B23; B23Q; B23Q11/00; B23P; B23P25/00; B23P25/003; Y; Y10; Y10S; Y10S82/00; Y10S82/90; Y10T; Y10T83/00; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
101 words
Apparatus for precision removal of material from an electrically conductive workpiece comprising, means for rotating the support means and workpiece, an electrically conductive material removal tool, means for supporting the tool in relation to the workpiece for removing material therefrom, a needle-like probe supported adjacent to and electrically insulated from the workpiece and the tool having a tip end, said tip end being spaced closer to the workpiece than the tool, and a source of high-voltage milliampere D.C. potential connected between the probe and tool producing a potential sufficient to create an electrical arc between the tip end and the workpiece.
Claim 2
Dependent Claim
101 words
Apparatus for precision removal of material from an electrically conductive workpiece comprising, means for rotating the support means and workpiece, an electrically conductive material removal tool, means for supporting the tool in relation to the workpiece for removing material therefrom, a needle-like probe supported adjacent to and electrically insulated from the workpiece and the tool having a tip end, said tip end being spaced closer to the workpiece than the tool, and a source of high-voltage milliampere D.C. potential connected between the probe and tool producing a potential sufficient to create an electrical arc between the tip end and the workpiece.
Claim 3
Dependent Claim
19 words
Apparatus as defined in claim 1, wherein the potential is on the order of 4 kilovolts and 5 milliamperes.
Claim 4
Dependent Claim
16 words
Apparatus as defined in claim 2, wherein the material removal tool is a carbide cutting tool.
Claim 5
Dependent Claim
17 words
Apparatus as defined in claim 2, wherein the material removal tool is a polycrystalline diamond cutting tool.
Claim 6
Dependent Claim
22 words
Apparatus as defined in claim 2, wherein the material removal tool is a polycrystalline diamond cutting tool and the workpiece is steel.
Claim 7
Dependent Claim
24 words
Apparatus as defined in claim 2, wherein the material removal tool is a polycrystalline diamond cutting tool and the workpiece is 390 aluminum alloy.
Claim 8
Dependent Claim
160 words
Apparatus for removing metal from an electrically conductive metal workpiece comprising, means for supporting a workpiece, means for rotating the support means and workpiece at a predetermined speed, an electrically conductive metal removal tool, means for supporting the tool in relation to the workpiece for removing metal therefrom, a power supply for producing a high-voltage milliampere D.C. potential, a needle-like probe supported adjacent to but in spaced relation to the workpiece and the tool and electrically insulated therefrom having a tip end, said tip end being spaced closer to the workpiece than the tool, and means connecting the power supply between the probe and the tool, said power supply producing a voltage level sufficient to create a continuous aRc between the tip end and the workpiece, whereby a readily visible arc is created between the tip end of the probe and the workpiece and a barely visible arc is created at the point of metal removal of the cutting tool.
Claim 9
Dependent Claim
160 words
Apparatus for removing metal from an electrically conductive metal workpiece comprising, means for supporting a workpiece, means for rotating the support means and workpiece at a predetermined speed, an electrically conductive metal removal tool, means for supporting the tool in relation to the workpiece for removing metal therefrom, a power supply for producing a high-voltage milliampere D.C. potential, a needle-like probe supported adjacent to but in spaced relation to the workpiece and the tool and electrically insulated therefrom having a tip end, said tip end being spaced closer to the workpiece than the tool, and means connecting the power supply between the probe and the tool, said power supply producing a voltage level sufficient to create a continuous aRc between the tip end and the workpiece, whereby a readily visible arc is created between the tip end of the probe and the workpiece and a barely visible arc is created at the point of metal removal of the cutting tool.
Claim 10
Dependent Claim
47 words
Apparatus as defined in claim 7, wherein the means connecting the power supply to the probe and tool includes a first conductor connecting one side of the power supply to the probe, and a second conductor connecting the other side of the power supply to the tool.
Claim 11
Dependent Claim
22 words
Apparatus as defined in claim 8, wherein said one side of the power supply is negative and said other side is positive.
Claim 12
Dependent Claim
19 words
Apparatus as defined in claim 9, wherein the potential is on the order of 4 kilovolts and 5 milliamperes.
Claim 13
Dependent Claim
18 words
Apparatus as defined in claim 10, wherein the electrically conductive metal removal tool is a carbide cutting tool.
Claim 14
Dependent Claim
19 words
Apparatus as defined in claim 10, wherein the electrically conductive metal removal tool is a polycrystalline diamond cutting tool.
Claim 15
Dependent Claim
24 words
Apparatus as defined in claim 10, wherein the electrically conductive metal removal tool is a polycrystalline diamond cutting tool and the workpiece is steel.
Claim 16
Dependent Claim
26 words
Apparatus as defined in claim 10, wherein the electrically conductive metal removal tool is a polycrystalline diamond cutting tool and the workpiece is 390 aluminum alloy.
Claim 17
Dependent Claim
154 words
Apparatus for dry machining metal workpieces comprising, means for supporting a workpiece, means for rotating the support means and workpiece at a predetermined speed, an electrically conductive cutting tool, means for supporting the tool in relation to the workpiece for removing metal therefrom, a power supply for producing a high-voltage milliampere D.C. potential, a needle-like probe supported adjacent to but in spaced relation to the workpiece and the tool and electrically insulated therefrom having a tip end, said tip end being spaced closer to the workpiece than the tool, and means connecting the power supply between the probe and the tool, said power supply producing a voltage level sufficient to create a continuous arc between the tip end and workpiece, whereby a readily visible arc is created between the tip end of the probe and the workpiece and a barely visible arc is created at the point of metal removal of the cutting tool.
Claim 18
Dependent Claim
154 words
Apparatus for dry machining metal workpieces comprising, means for supporting a workpiece, means for rotating the support means and workpiece at a predetermined speed, an electrically conductive cutting tool, means for supporting the tool in relation to the workpiece for removing metal therefrom, a power supply for producing a high-voltage milliampere D.C. potential, a needle-like probe supported adjacent to but in spaced relation to the workpiece and the tool and electrically insulated therefrom having a tip end, said tip end being spaced closer to the workpiece than the tool, and means connecting the power supply between the probe and the tool, said power supply producing a voltage level sufficient to create a continuous arc between the tip end and workpiece, whereby a readily visible arc is created between the tip end of the probe and the workpiece and a barely visible arc is created at the point of metal removal of the cutting tool.
Claim 19
Dependent Claim
19 words
Apparatus as defined in claim 15, wherein the potential is on the order of 4 kilovolts and 5 milliamperes.
Claim 20
Dependent Claim
15 words
Apparatus as defined in claim 16, wherein the cutting tool is a carbide cutting tool.
Claim 21
Dependent Claim
16 words
Apparatus as defined in claim 17, wherein the cutting tool is a polycrystalline diamond cutting tool.
Claim 22
Dependent Claim
125 words
Apparatus for dry machining electrically conductive metal workpieces comprising, a bed, a tool holder mounted on the bed, a workpiece holder mounted on the bed, a machining tool mounted on the tool holder, a needle-like probe supported on the bed in electrical insulated relation therewith, said probe having a tip end adjacent a workpiece supported by the workpiece holder and area of machining of the machining tool, said tip end being spaced closer to the workpiece than said area of machining, a source of high-voltage milliampere D.C. potential, means connecting the said potential between the probe and the machining tool, and said potential being at a level sufficient to maintain a readily visible continuous arc between the tip end of the probe and the workpiece.
Claim 23
Dependent Claim
125 words
Apparatus for dry machining electrically conductive metal workpieces comprising, a bed, a tool holder mounted on the bed, a workpiece holder mounted on the bed, a machining tool mounted on the tool holder, a needle-like probe supported on the bed in electrical insulated relation therewith, said probe having a tip end adjacent a workpiece supported by the workpiece holder and area of machining of the machining tool, said tip end being spaced closer to the workpiece than said area of machining, a source of high-voltage milliampere D.C. potential, means connecting the said potential between the probe and the machining tool, and said potential being at a level sufficient to maintain a readily visible continuous arc between the tip end of the probe and the workpiece.
Claim 24
Dependent Claim
19 words
Apparatus as defined in claim 19, wherein the potential is on the order of 4 kilovolts and 5 milliamperes.
Claim 25
Dependent Claim
23 words
Apparatus as defined in claim 20, wherein the workpiece is 390 aluminum alloy and the machining tool is a polycrystalline diamond cutting tool.
Claim 26
Dependent Claim
21 words
Apparatus as defined in claim 20, wherein the workpiece is steel and the machining tool is a polycrystalline diamond cutting tool.
Claim 27
Dependent Claim
15 words
Apparatus as defined in claim 20, wherein the machining tool is a carbide cutting tool.
Claim 28
Independent Claim
117 words
The method of removing material from an electrically conductive workpiece, wherein the Workpiece is mounted on a support that is rotatably driven and an electrically conductive material removing tool is mounted adjacent to and in material removing engagement with the workpiece, said method including the steps of mounting a probe having a tip end in spaced and electrically insulated relation to the workpiece and tool and adjacent to the area of material removal so that the tip end is closer to the workpiece than the tool, and applying a high-voltage milliampere D.C. potential between the probe and the tool such that a continuous electrical arc is created between the tip end of the probe and the workpiece.
Claim 29
Independent Claim
117 words
The method of removing material from an electrically conductive workpiece, wherein the Workpiece is mounted on a support that is rotatably driven and an electrically conductive material removing tool is mounted adjacent to and in material removing engagement with the workpiece, said method including the steps of mounting a probe having a tip end in spaced and electrically insulated relation to the workpiece and tool and adjacent to the area of material removal so that the tip end is closer to the workpiece than the tool, and applying a high-voltage milliampere D.C. potential between the probe and the tool such that a continuous electrical arc is created between the tip end of the probe and the workpiece.
Claim 30
Dependent Claim
29 words
The method as defined in claim 24, wherein the step of applying a potential further includes maintaining the potential level on the order of 4 kilovolts and 5 milliamperes.
Claim 31
Independent Claim
133 words
The method of dry machining a workpiece, wherein a workpiece holder is mounted on a bed and a machining tool holder is mounted on the bed for holding a machining tool in machining relation to a workpiece mounted in the workpiece holder, which method comprises the steps of mounting an electrically conductive workpiece in the workpiece holder, mounting an electrically conductive machining tool in the tool holder, mounting a needle-like probe having a tip end on the bed in electrically insulated relation to the workpiece and the tool, positioning the tip end in spaced relation to the workpiece and the tool but closer to the workpiece, and connecting a high-voltage milliampere D.C. potential between the probe and the tool such that a continuous arc is presented between the tip end and the workpiece.
Claim 32
Independent Claim
133 words
The method of dry machining a workpiece, wherein a workpiece holder is mounted on a bed and a machining tool holder is mounted on the bed for holding a machining tool in machining relation to a workpiece mounted in the workpiece holder, which method comprises the steps of mounting an electrically conductive workpiece in the workpiece holder, mounting an electrically conductive machining tool in the tool holder, mounting a needle-like probe having a tip end on the bed in electrically insulated relation to the workpiece and the tool, positioning the tip end in spaced relation to the workpiece and the tool but closer to the workpiece, and connecting a high-voltage milliampere D.C. potential between the probe and the tool such that a continuous arc is presented between the tip end and the workpiece.
Claim 33
Dependent Claim
28 words
The method as defined in claim 26, wherein the step of applying a potential includes maintaining the potential level on the order of 4 kilovolts and 5 milliamperes.
Claim 34
Dependent Claim
48 words
The method as defined in claim 27, wherein the step of mounting a workpiece in the workpiece holder includes the use of a workpiece of 390 aluminum alloy, and the step of mounting a tool in the tool holder includes the use of a polycrystalline diamond cutting tool.
Claim 35
Dependent Claim
46 words
The method as defined in claim 27, wherein the step of mounting a workpiece in the workpiece holder includes the use of a workpiece of steel, and the step of mounting a tool in the tool holder includes the use of a polycrystalline diamoned cutting tool.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |