Patent US409867A successfully refreshed from Google Patents.
Patent US3333457A successfully refreshed from Google Patents.
US3333457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic ram assembly for a forging press
Assignee: Cooper Industries LLC
•
Filing: 1965-03-01
•
Granted: 1967-08-01
•
Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Allen Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:49
CPC Classifications
B; B21; B21J; B21J9/00; B21J9/10; B21J9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A HYDRAULIC RAM ASSEMBLY FOR A FORGING PRESS HAVING TWO RELATIVELY MOVABLE PLATENS BETWEEN WHICH THE RAM ASSEMBLY CAN BE LOCATED TO EXERT A FORCE ON THE PLATENS, SAID RAM ASSEMBLY COMPRISING, AN OUTER CYLINDER ADAPTED TO ENGAGE ONE OF SAID PLATENS, A FIRST PISTON LOCATED IN THE OUTER CYLINDER TO FORM A FIRST PRESSURE CHAMBER IN THE OUTER CYLINDER BETWEEN SAID PISTON AND SAID PLATEN, AN INNER CYLINDER CONNECTED TO THE OUTER PERIPHERY OF THE FIRST PISTON AND POSITIONED TO ENGAGE SAID OTHER PLATEN, A SECOND PISTON LOCATED IN THE INNER CYLINDER TO FORM A SECOND PRESSURE CHAMBER IN THE INNER CYLINDER BETWEEN THE SECOND PISTON AND SAID OTHER PLATEN, A PISTON ROD EXTENDING THROUGH THE FIRST PISTON TO ENGAGE THE SECOND PISTON AND THE ENGAGED BY THE OUTER CYLINDER, TO TRANSMIT FROM THE SECOND PISTON TO SAID PLATEN THE FORCE EXERTED ON THE SECOND PISTON BY PRESSURE FLUID IN SAID SECOND PRESSURE CHAMBER AND MEANS FOR SUPPLYING BOTH THE FIRST AND SECOND PRESSURE CHAMBERS WITH HYDRAULIC PRESSURE.
Claim 2
Dependent Claim
169 words
A HYDRAULIC RAM ASSEMBLY FOR A FORGING PRESS HAVING TWO RELATIVELY MOVABLE PLATENS BETWEEN WHICH THE RAM ASSEMBLY CAN BE LOCATED TO EXERT A FORCE ON THE PLATENS, SAID RAM ASSEMBLY COMPRISING, AN OUTER CYLINDER ADAPTED TO ENGAGE ONE OF SAID PLATENS, A FIRST PISTON LOCATED IN THE OUTER CYLINDER TO FORM A FIRST PRESSURE CHAMBER IN THE OUTER CYLINDER BETWEEN SAID PISTON AND SAID PLATEN, AN INNER CYLINDER CONNECTED TO THE OUTER PERIPHERY OF THE FIRST PISTON AND POSITIONED TO ENGAGE SAID OTHER PLATEN, A SECOND PISTON LOCATED IN THE INNER CYLINDER TO FORM A SECOND PRESSURE CHAMBER IN THE INNER CYLINDER BETWEEN THE SECOND PISTON AND SAID OTHER PLATEN, A PISTON ROD EXTENDING THROUGH THE FIRST PISTON TO ENGAGE THE SECOND PISTON AND THE ENGAGED BY THE OUTER CYLINDER, TO TRANSMIT FROM THE SECOND PISTON TO SAID PLATEN THE FORCE EXERTED ON THE SECOND PISTON BY PRESSURE FLUID IN SAID SECOND PRESSURE CHAMBER AND MEANS FOR SUPPLYING BOTH THE FIRST AND SECOND PRESSURE CHAMBERS WITH HYDRAULIC PRESSURE.
References Cited (Backward Citations)
US788876A
Cited
US1268270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |