Pressure vessel head retainer
Abstract
Abstract AN ENCLOSURE FOR A BARREL-TYPE CENTRIFUGAL COMPRESSOR OR OTHER PRESSURE VESSEL CONSISTING OF A CYLINDRICAL CASING CLOSED BY END HEADS RECEIVED WITHIN THE CYLINDRICAL CASING IN SEALED RELATION THEREWITH. THE CASE IS PROVIDED WITH AN INTERNAL ANNULAR GROOVE WHICH ACCOMMODATES A RETAINER RING ASSEMBLY CONSISTING OF SHEAR RING AND A LOCKING RING, EACH MADE UP OF SEVERAL SEGMENTS. THE SHEAR RING IS GENRALLY RECTANGULAR IN CROSS SECTION AND IS PROVIDED WITH AN AXIALLY EXTENDING ANNULAR LIP, WHICH OVERLIES THE PERIPHERY OF THE END HEAD, AND WITH AN EXTERNAL BEARING SURFACE FOR ENGAGING THE GROOVE BOTTOM. THE LOCKING RING OCCUPIES THE SPACE IN THE GROOVE BETWEEN ITS OUTER FACE AND THE SHEAR RING. THE SHEAR RING SEGMENTS AND LOCKING RING SEGMENTS ARE BOLTED TOGETHER TO FORM AN INTEGRAL RETAINER RING ASSEMBLY. ROTATION OF THE RETAINER RING ASSEMBLY, UNDER LOADING IN SHEAR, IS PREVENTED BY THE LIP AND BEARING SURFACE.
Inventors
- 👤 Ted C Evans
Bibliographic Details
Claims Analysis
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |