Patent US3347199A successfully refreshed from Google Patents.
US3347199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll stabilizers
Assignee: National Research Development Corp UK
•
Filing: 1966-01-28
•
Granted: 1967-10-17
•
Expires: 1986-01-28
Abstract
No abstract record available.
Inventors
- 👤 Goodrich Geoffrey John
- 👤 Williams Robin Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:51
CPC Classifications
B; B63; B63B; B63B39/00; B63B39/02; B63B39/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A STABILIZING SYSTEM OF THE KIND SET FORTH FOR A STRUCTURE FLOATING IN A LIQUID AND OSCILLATABLE ABOUT A HORIZONTAL AXIS COMPRISING A SINGLE LIQUID-CONTAINING TANK FIXED TO THE STRUCTURE WITH SUBSTANTIALLY FREE AIR MOVEMENT OVER THE LIQUID, AND A PLATE-LIKE DIVIDER OF SUBSTANTIAL VERTICAL THICKNESS LOCATED IN THE TANK WITH ITS UPPER SURFACE SUBSTANTIALLY BELOW THE STATIC LEVEL OF THE LIQUID, THE DIVIDER BEING ARRANGED SYMMETRICALLY AND PERPENDICULARLY TO THE VERTICAL MID-PLANE OF THE TANK CONTAINING OR PARALLEL TO THE AXIS ABOUT WHICH STABILIZATION IS TO BE EFFECTED, HAVING A DIMENSION PERPENDICULAR TO THAT PLANE WHICH IS FROM 40 TO 60 PERCENT OF THE DIMENSION OF THE TANK IN THE SAME DIRECTION, AND EXTENDING IN ITS HORIZONTAL DIRECTION PARALLEL WITH THE AXIS OF ROLL SUBSTANTIALLY COMPLETELY ACROSS THE TANK, THE ARRANGEMENT BEING SUCH THAT IN USE THE DIVIDER IS WHOLLY LOCATED BELOW THE STATIC LEVEL OF THE LIQUID AND DURING THE OSCILLATIONS OF THE STRUCTURE ABOUT THE AXIS WHICH STABILIZATION IS TO BE EFFECTED, AT LEAST AT THE NATURAL FREQUENCY OF OSCILLATION OF THE STRUCTURE, LIQUID FLOWS BENEAT AND OVER THE DIVIDER AT DIFFERENT MASS RATES.
Claim 2
Dependent Claim
187 words
A STABILIZING SYSTEM OF THE KIND SET FORTH FOR A STRUCTURE FLOATING IN A LIQUID AND OSCILLATABLE ABOUT A HORIZONTAL AXIS COMPRISING A SINGLE LIQUID-CONTAINING TANK FIXED TO THE STRUCTURE WITH SUBSTANTIALLY FREE AIR MOVEMENT OVER THE LIQUID, AND A PLATE-LIKE DIVIDER OF SUBSTANTIAL VERTICAL THICKNESS LOCATED IN THE TANK WITH ITS UPPER SURFACE SUBSTANTIALLY BELOW THE STATIC LEVEL OF THE LIQUID, THE DIVIDER BEING ARRANGED SYMMETRICALLY AND PERPENDICULARLY TO THE VERTICAL MID-PLANE OF THE TANK CONTAINING OR PARALLEL TO THE AXIS ABOUT WHICH STABILIZATION IS TO BE EFFECTED, HAVING A DIMENSION PERPENDICULAR TO THAT PLANE WHICH IS FROM 40 TO 60 PERCENT OF THE DIMENSION OF THE TANK IN THE SAME DIRECTION, AND EXTENDING IN ITS HORIZONTAL DIRECTION PARALLEL WITH THE AXIS OF ROLL SUBSTANTIALLY COMPLETELY ACROSS THE TANK, THE ARRANGEMENT BEING SUCH THAT IN USE THE DIVIDER IS WHOLLY LOCATED BELOW THE STATIC LEVEL OF THE LIQUID AND DURING THE OSCILLATIONS OF THE STRUCTURE ABOUT THE AXIS WHICH STABILIZATION IS TO BE EFFECTED, AT LEAST AT THE NATURAL FREQUENCY OF OSCILLATION OF THE STRUCTURE, LIQUID FLOWS BENEAT AND OVER THE DIVIDER AT DIFFERENT MASS RATES.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |