US3180129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Top-pressure forging hammer
Assignee: Eumuco AG fuer Maschinenbau
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Filing: 1961-10-19
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Granted: 1965-04-27
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Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 Riemenschneider Fritz
- 👤 Hassel Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
IN A TOP FORGING HAMMER OF THE COUNTERBLOW TYPE COMPRISING A PAIR OF OPPOSED RAMS MOVABLE TOWARDS EACH OTHER INCLUDING PISTONS MOUNTED IN CYLINDERS, A HYDRAULIC SYSTEM FOR SAID RAMS INCLUDING A CONSTANT DELIVERY PUMP, SAID HYDRAULIC SYSTEM INCLUDING AN OSCILLATORY HYDRAULIC SYSTEM BETWEEN SAID PUMP AND SAID PISTONS AND INCLUDING A PRESSURE LIQUID COMPLETELY FILLING A LIQUID CONTAINER CONTINUOUSLY UNDER AN INITIAL LOAD AND ACTING AS A HYDRAULIC SPRING, SAID PISTONS HAVING WORKING SURFACES OF GREATER AREA THAN THEIR RETURN SURFACES, SAID LIQUID CONTAINER AND OSCILLATORY HYDRAULIC SYSTEM BEING IN OPEN COMMUNICATION WITH AT LEAST ONE OF SAID CYLINDERS FOR APPLYING A FORCE ON SAID RETURN FACE OF THE RESPECTIVE PISTON TO URGE SAID LAST MENTIONED PISTON TO A RETRACTED POSITION WITH THE PRESSURE ON SAID RETURN FACE BEING OVER-BALANCED BY SELECTED PRESSURE ON SAID RETURN FACE BEING OVER-BALANCED LAST MENTIONED PISTON.
Claim 2
Dependent Claim
143 words
IN A TOP FORGING HAMMER OF THE COUNTERBLOW TYPE COMPRISING A PAIR OF OPPOSED RAMS MOVABLE TOWARDS EACH OTHER INCLUDING PISTONS MOUNTED IN CYLINDERS, A HYDRAULIC SYSTEM FOR SAID RAMS INCLUDING A CONSTANT DELIVERY PUMP, SAID HYDRAULIC SYSTEM INCLUDING AN OSCILLATORY HYDRAULIC SYSTEM BETWEEN SAID PUMP AND SAID PISTONS AND INCLUDING A PRESSURE LIQUID COMPLETELY FILLING A LIQUID CONTAINER CONTINUOUSLY UNDER AN INITIAL LOAD AND ACTING AS A HYDRAULIC SPRING, SAID PISTONS HAVING WORKING SURFACES OF GREATER AREA THAN THEIR RETURN SURFACES, SAID LIQUID CONTAINER AND OSCILLATORY HYDRAULIC SYSTEM BEING IN OPEN COMMUNICATION WITH AT LEAST ONE OF SAID CYLINDERS FOR APPLYING A FORCE ON SAID RETURN FACE OF THE RESPECTIVE PISTON TO URGE SAID LAST MENTIONED PISTON TO A RETRACTED POSITION WITH THE PRESSURE ON SAID RETURN FACE BEING OVER-BALANCED BY SELECTED PRESSURE ON SAID RETURN FACE BEING OVER-BALANCED LAST MENTIONED PISTON.
References Cited (Backward Citations)
US2220037A
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US2619072A
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US2770222A
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US2785535A
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US2800110A
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US2920607A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |