Patent US3348810A successfully refreshed from Google Patents.
US3348810A
Expired / Lapsed
US
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Hydraulic balancing device
Assignee: Individual
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Filing: 1966-03-29
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Granted: 1967-10-24
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Expires: 1986-03-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Martin J Curran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:55
CPC Classifications
B; B66; B66F; B66F3/00; B66F3/46; B22; B22C; B22C11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN APPARATUS COMPRISING A SUPPORT, A PLURALITY OF ELEMENTS MOVABLY MOUNTED THEREON, AND A BALANCING HYDRAULIC SYSTEM CONNECTING AND IN PART CONTROLLING THE MOTION OF SAID ELEMENTS UNDER EXTERNAL PRESSURE, A CYLINDER FOR EACH ELEMENT, EACH ELEMENT APPLYING INCREASED PRESSURE TO ITS CYLINDER AS IT RETRACTS WITH RESPECT THERETO UNDER EXTERNAL PRESSURE, AND A CENTRAL VALVE SYSTEM CONNECTED TO THE CYLINDERS AND BEING EFFECTIVE TO TRANSFER PRESSURE FROM ANY CYLINDER UNDER SUCH INCREASED PRESSURE TO ANY CYLINDER UNDER LESSER PRESSURE, SAID VALVE SYSTEM INCLUDING A BALANCE VALVE EFFECTIVE TO CEASE SUCH TRANSFER WHEN THE EXTERIOR PRESSURES ON THE SEVERAL ELEMENTS IS SUBSTANTIALLY EQUAL.
Claim 2
Independent Claim
103 words
AN APPARATUS COMPRISING A SUPPORT, A PLURALITY OF ELEMENTS MOVABLY MOUNTED THEREON, AND A BALANCING HYDRAULIC SYSTEM CONNECTING AND IN PART CONTROLLING THE MOTION OF SAID ELEMENTS UNDER EXTERNAL PRESSURE, A CYLINDER FOR EACH ELEMENT, EACH ELEMENT APPLYING INCREASED PRESSURE TO ITS CYLINDER AS IT RETRACTS WITH RESPECT THERETO UNDER EXTERNAL PRESSURE, AND A CENTRAL VALVE SYSTEM CONNECTED TO THE CYLINDERS AND BEING EFFECTIVE TO TRANSFER PRESSURE FROM ANY CYLINDER UNDER SUCH INCREASED PRESSURE TO ANY CYLINDER UNDER LESSER PRESSURE, SAID VALVE SYSTEM INCLUDING A BALANCE VALVE EFFECTIVE TO CEASE SUCH TRANSFER WHEN THE EXTERIOR PRESSURES ON THE SEVERAL ELEMENTS IS SUBSTANTIALLY EQUAL.
References Cited (Backward Citations)
US2859591A
Cited
US3265357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |