US3196647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of hydraulic forging presses
Assignee: Schloemann AG
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Filing: 1961-07-14
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Granted: 1965-07-27
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Expires: 1981-07-14
Abstract
No abstract record available.
Inventors
- 👤 Schneider Ralf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:44
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16; B30B15/18; B21; B21J; B21J9/00; B21J9/10; B21J9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A HYDRAULIC FORGING PRESS, COMPRISING: AN UPPER DIE AND A LOWER DIE BETWEEN WHICH WORK-PIECES ARE FORGED, PISTONS AND CYLINDERS FOR RAISING AND LOWERING THE UPPER DIE, VALVES CONTROLLING THE ADMISSION OF PRESSURE LIQUID AND FILLING LIQUID TO THE SAID CYLINDERS AND THE DISCHARGE OF LIQUID THEREFROM, AN IMPULSE-GENERATOR ACTUATED BY THE MOVEMENTS OF THE UPPER DIE AND ADAPTED TO DELIVER POSITIVE AND NEGATIVE IMPULSES ACCORDING TO THE MAGNITUDE AND DIRECTION OF SUCH MOVEMENTS, AN OSCILLATOR ADAPTED TO FURNISH POSITIVE AND NEGATIVE IMPULSES CONTROLLABLE AT WILL, A CONTROL DIFFERENCE COUNTER CONNECTED WITH THE IMPULSE-GENERATOLR AND WITH THE OSCILLATOR SO AS TO RECEIVE IMPULSES FROM BOTH OF THEM, AND, BY KNOWN DIGITAL AND SWITCHING TECHNIQUE, TO DELIVERY SWITCHING SIGNALS, A VALVE CONTROL ACTUATED BY SWITCHING SIGNALS RECEIVED FROM THE CONTROL DIFFERENCE COUNTER AND ADAPTED TO OPEN AND CLOSE THE VALVES OF THE HYDRAULIC PRESS IN ACCORDANCE WITH SUCH SIGNALS.
Claim 2
Dependent Claim
148 words
A HYDRAULIC FORGING PRESS, COMPRISING: AN UPPER DIE AND A LOWER DIE BETWEEN WHICH WORK-PIECES ARE FORGED, PISTONS AND CYLINDERS FOR RAISING AND LOWERING THE UPPER DIE, VALVES CONTROLLING THE ADMISSION OF PRESSURE LIQUID AND FILLING LIQUID TO THE SAID CYLINDERS AND THE DISCHARGE OF LIQUID THEREFROM, AN IMPULSE-GENERATOR ACTUATED BY THE MOVEMENTS OF THE UPPER DIE AND ADAPTED TO DELIVER POSITIVE AND NEGATIVE IMPULSES ACCORDING TO THE MAGNITUDE AND DIRECTION OF SUCH MOVEMENTS, AN OSCILLATOR ADAPTED TO FURNISH POSITIVE AND NEGATIVE IMPULSES CONTROLLABLE AT WILL, A CONTROL DIFFERENCE COUNTER CONNECTED WITH THE IMPULSE-GENERATOLR AND WITH THE OSCILLATOR SO AS TO RECEIVE IMPULSES FROM BOTH OF THEM, AND, BY KNOWN DIGITAL AND SWITCHING TECHNIQUE, TO DELIVERY SWITCHING SIGNALS, A VALVE CONTROL ACTUATED BY SWITCHING SIGNALS RECEIVED FROM THE CONTROL DIFFERENCE COUNTER AND ADAPTED TO OPEN AND CLOSE THE VALVES OF THE HYDRAULIC PRESS IN ACCORDANCE WITH SUCH SIGNALS.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |