Method of making expansion joint for fluid conduits
Abstract
Abstract AN EXPANSION JOINT INTERCONNECTING A PAIR OF FLANGED PIPES COMPRISES A TOROIDAL COMPENSATOR TUBE OF FLUIDIMPERMEABLE ELASTIC MATERIAL ENCLOSING TWO METALLIC RINGS WHICH ARE SUBSTANTIALLY COEXTENSIVE WITH THE ADJOINING PIPE FLANGES AND ARE FASTENED THERETO IN A FLUIDTIGHT MANNER BY SCREWS TRANSVERSING THE TUBE WALL. TO DISPOSE THE TWO METAL RINGS INSIDE THE COMPENSATOR TUBE, THE RINGS ARE COAXIALLY PLACED ON OPPOSITE SIDES OF A TOROIDAL BODY OF SAND OR OTHER FLOWABLE BULK MATERIAL HELD IN POSITION BY A TUBULAR LINER OF FABRIC OR THE LIKE WHICH IS THEN ENSHROUDED IN A SHEATH OF ELASTOMERIC MATERIAL MOLDED THEREAROUND, HOLES ARE THEREAFTER FORMED IN THE ELASTOMERIC SHEATH AND THE LINER TO ACCOMMODATE FASTENING SCREWS ENGAGING THE RINGS, WHEREUPON THE BULK MATERIAL IS DISCHARGED FROM THE INTERIOR OF THE COMPENSATOR TUBE THROUGH SOME OF THESE HOLES PRIOR TO INSERTION OF THE SCREWS. THE RINGS ARE ADVANTAGEOUSLY BONDED, PREFERABLY BY VULCANIZATION, TO THE INNER TUBE WALL.
Inventors
- 👤 Alfred Wendt
Bibliographic Details
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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) | 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 |