Flotation system
Abstract
Abstract A FLOTATION DEVICE USEFUL FOR LIFTING A SUBMERGED LOAD TO THE SURFACE COMPRISES A CLAM-SHAPED CONTAINER MADE UP OF A TOP COVER AND A BOTTOM COVER AND AN INFLATABLE BAG THEREIN. THE OPEN END OF THE INFLATABLE BAG IS FIXED TO THE INSIDE OF THE BOTTOM COVER AND THE CLOSED UPPER END OF THE INFLATABLE BAG IS FIXED TO THE INSIDE OF THE UPPER COVER, SAID TOP AND BOTTOM COVERS BEING RELEASABLY GRIPPED TOGETHER. GAS GENERATING MEANS PREFERABLY MADE UP OF A SOLID CHEMICAL COMPOUND REACTIVE UPON CONTACT WITH WATER TO GENERATE A GAS, SUCH AS HYDROGEN GAS, IS PROVIDED WITHIN THE CONTAINER. THE CONTAINER IS FREE FLOODING AND WHEN THE GAS GENERATING MEANS IS ACTIVATED TO EXPOSE SAID CHEMICAL COMPOUND, SUCH AS A HYDRIDE, OXIDE OR PEROXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, CALCIUM, POTASSIUM AND ALUMINUM AND MIXTURES THEREOF, TO CONTACT WITH WATER, THE RESULTING GENERATED GAS RELEASES THE TOP COVER FROM THE BOTTOM COVER AND IS CONFINED WITHIN AND INFLATES THE INFLATABLE BAG SO AS TO LIFT THE SUBMERGED OBJECT TO WHICH THE DEVICE IS ATTACHED.
Inventors
- 👤 William M Davidson
- 👤 Howard W Cole Jr
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |