Patent US3739135A successfully refreshed from Google Patents.
US3739135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro erosion machining apparatus
Assignee: Ateliers des Charmilles SA
•
Filing: 1971-10-20
•
Granted: 1973-06-12
•
Expires: 1991-10-20
Abstract
Abstract An electro-erosion machining apparatus particularly adapted for electro-eroding workpieces of large dimensions and weight. The apparatus is provided with a frame supporting a pair of parallel platens, one of the platens being adjustably positionable at various positions relatively to the other platen. An intermediary platen, disposed between the two platens mounted on the frame of the apparatus, is supported from one of the platens by appropriate guiding means and is driven relatively thereto by way of a servo mechanism controlled by the servo control adapted to normally maintain a finite spacing between the surface of a workpiece and the working surface of an electrode tool in electro-erosion machining apparatus. The intermediary platen forms part of the workpiece and electrode tool assembly of the apparatus.
Inventors
- 👤 J Pfau
- 👤 H Schaidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:32
CPC Classifications
B; B23; B23H; B23H7/00; B23H7/26; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/50; B23Q1/54; B23Q1/5468; B23Q1/56; B23Q1/58; B23Q1/585; B23Q1/60; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
190 words
In an electro-erosion machining apparatus comprising a frame, an assembly formed of an electrode tool holder supporting an electrode tool and a workpiece holder supporting a workpiece, a power supply connected across said electrode tool and said workpiece, means for supplying a fluid between said electrode tool and said workpiece and servo control means for continuously controlling the spacing between said electrode tool and said workpiece, the improvement comprising a pair of substantially parallel platens supported by said frame, means for adjustably positioning said platens relatively to each other at variable fixed distances from each other independently of said servo control means, an intermediary platen disposed between said first mentioned platens substantially parallel thereto and displaceably supported by one of said first mentioned platens, means guiding the displacement of said intermediary platen relative to said platen supporting said intermediary platen, said intermediary platen and the other of said first mentioned platens defining said electrode tool holder and workpiece holder assembly, and a servo mechanism for displacing said intermediary platen relatively to said platen supporting said intermediary platen for a relatively short distance under the control of said servo control means.
Claim 2
Dependent Claim
190 words
In an electro-erosion machining apparatus comprising a frame, an assembly formed of an electrode tool holder supporting an electrode tool and a workpiece holder supporting a workpiece, a power supply connected across said electrode tool and said workpiece, means for supplying a fluid between said electrode tool and said workpiece and servo control means for continuously controlling the spacing between said electrode tool and said workpiece, the improvement comprising a pair of substantially parallel platens supported by said frame, means for adjustably positioning said platens relatively to each other at variable fixed distances from each other independently of said servo control means, an intermediary platen disposed between said first mentioned platens substantially parallel thereto and displaceably supported by one of said first mentioned platens, means guiding the displacement of said intermediary platen relative to said platen supporting said intermediary platen, said intermediary platen and the other of said first mentioned platens defining said electrode tool holder and workpiece holder assembly, and a servo mechanism for displacing said intermediary platen relatively to said platen supporting said intermediary platen for a relatively short distance under the control of said servo control means.
Claim 3
Dependent Claim
37 words
The improvement of claim 1 further comprising adjustable pneumatic cushioning means between said intermediary platen and said one of said first mentioned platens for substantially balancing the weight of said intermediary platen and of elements mounted thereon.
Claim 4
Dependent Claim
40 words
The improvement of claim 1 wherein said servo mechanism comprises a plurality of substantially parallel jack screws interconnecting said intermediary platen and said one of said first mentioned platens and a servo motor for rotating said jack screws in unison.
Claim 5
Dependent Claim
57 words
The improvement of claim 3 wherein a driven crank member is mounted on an end of each of said jack screws, a driving crank member is coupled to said servo motor and a rigid common connecting member is disposed between said driving crank member and said driven crank members for driving said driven crank members in unison.
Claim 6
Dependent Claim
75 words
The improvement of claim 1 wherein said servo mechanism comprises a pair of substantially parallel shafts each having an axis of rotation substantially parallel to said intermediary platen, said shafts being disposed between said intermediary platen and said one of said first mentioned platens, camming means mounted on each of said shafts in engagement with said intermediary platen and servo motor means for rotating said shafts in unison for causing displacement of said intermediary platen.
Claim 7
Dependent Claim
74 words
The improvement of claim 1 wherein said servo mechanism comprises movable wedge means disposed between said intermediary platen and said one of said first mentioned platens, said wedge means being in sliding engagement with conforming ramp means dependent from at least one of said intermediary platen and said one of said first mentioned platens, and servo motor means for displacing said wedge means in unison for in turn causing displacement of said intermediary platen.
Claim 8
Dependent Claim
35 words
The improvement of claim 1 further comprising support means for one of said first mentioned platens for permitting said platen to be displaced relatively to the other in a plane substantially parallel to said platens.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |