Patent US4183579A successfully refreshed from Google Patents.
Patent US3299458A successfully refreshed from Google Patents.
US3801770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for electrical machining
Assignee: Individual
•
Filing: 1971-06-14
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Granted: 1974-04-02
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Expires: 1991-06-14
Abstract
Abstract A machine tool comprising a large elongated fluid tank, dry chamber boxes at each end of the tank supporting spindles having electrodes secured thereto for reciprocal movement toward and away from a workpiece positioned between the dry chambers in the middle of the fluid tank. Means for moving the dry chamber and the spindle and electrode carried thereby toward and away from the workpiece and for simultaneously rotating the spindles and electrodes. An electrical machining power supply with each spindle at each end of the dielectric tank, servo means for controlling the movement of the spindles and separate fluid supply means for passing fluid through the spindles to the electrodes. Adjusting bolt and abutment structure at one end of the tank to align the spindles at the opposite ends of the tank. Structures for hydraulically clamping a workpiece between the electrodes and for leveling a work table in position beneath the electrodes in the tank. The method including moving a pair of electrodes toward a workpiece from the opposite sides thereof, maintaining a predetermined gap between the electrodes and workpiece while simultaneously rotating the electrodes and passing an electric signal between the electrodes and workpiece in the presence of a dielectric or an electrolyte.
Inventors
- 👤 Connor T O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:30
CPC Classifications
B; B23; B23H; B23H7/00; B23H1/00; B23H2400/00; B23H2400/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
Structure for leveling a work table on a base in electrical machining apparatus or the like comprising means extending through the work table into engagement with the base for adjusting the position of the work table on the base whereby the work table may be leveled on the base, including a leveling member threaded through the bottom of the work table and engaged with the base, an annular collar positioned in the work table concentric with the leveling member, studs connecting the collar and leveling member for rotation together while permitting axial movement therebetween, and means extending through the work table and into the base for releasably locking the work table in the adjusted position.
Claim 2
Dependent Claim
115 words
Structure for leveling a work table on a base in electrical machining apparatus or the like comprising means extending through the work table into engagement with the base for adjusting the position of the work table on the base whereby the work table may be leveled on the base, including a leveling member threaded through the bottom of the work table and engaged with the base, an annular collar positioned in the work table concentric with the leveling member, studs connecting the collar and leveling member for rotation together while permitting axial movement therebetween, and means extending through the work table and into the base for releasably locking the work table in the adjusted position.
Claim 3
Dependent Claim
33 words
Structure as set forth in claim 1 wherein the means for locking the work table in the adjusted position comprises a bolt extending through the collar and leveling member and into the base.
Claim 4
Dependent Claim
115 words
Structure for leveling a work table on a base in electrical machining apparatus or the like comprising means contained within the work table below the work surface of the work table and extending through the work table into engagement with the base for adjusting the position of the work table on the base from the work surface side of the work table whereby the work table mAy be leveled on the base and means extending concentrically through the means for adjusting the position of the work table on the base and into the base also adjustable from the work surface side of the work table for releasably locking the work table in the adjusted position.
Claim 5
Dependent Claim
115 words
Structure for leveling a work table on a base in electrical machining apparatus or the like comprising means contained within the work table below the work surface of the work table and extending through the work table into engagement with the base for adjusting the position of the work table on the base from the work surface side of the work table whereby the work table mAy be leveled on the base and means extending concentrically through the means for adjusting the position of the work table on the base and into the base also adjustable from the work surface side of the work table for releasably locking the work table in the adjusted position.
Claim 6
Dependent Claim
38 words
Structure as set forth in claim 3 wherein the means for locking the work table in the adjusted position comprises a bolt extending through the means for adjusting the position of the work table and into the base.
Claim 7
Dependent Claim
35 words
Structure as set forth in claim 3 wherein the means for adjusting the position of the work table comprises a leveling member threaded through the bottom of the work table and engaged with the base.
Claim 8
Dependent Claim
38 words
Structure as set forth in claim 5 wherein the means for locking the work table in the adjusted position comprises a bolt extending through the means for adjusting the position of the work table and into the base.
Claim 9
Dependent Claim
49 words
Structure as set forth in claim 5 wherein the means for adjusting the position of the work table further includes an annular collar positioned in the work table concentric with the leveling member, and studs connecting the collar and leveling member for rotation together while permitting axial movement therebetween.
Claim 10
Dependent Claim
38 words
Structure as set forth in claim 7 wherein the means for locking the work table in the adjusted position comprises a bolt extending through the means for adjusting the position of the work table and into the base.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |