Top entry ball valve
Abstract
Abstract A BALL VALVE HAVING A PARTIALLY SPHERICAL BALL PROVIDED WITH AN OPENING THERETHROUGH, WHICH MAY BE ROTATED TO PERMIT OR TO PREVENT THE PASSAGE OF FLUID. A BODY HAS TWO LONGITUDINALLY ALIGNED FLUID PASSAGES AND A LATERAL OPENING COMMUNICATING WITH A CENTRAL SPACE. A ROTATABLE BALL, HAVING AN OPENING COMMUNICABLE WITH THE FLUID PASSAGES, IS POSITIONED WITHIN THE CENTRAL SPACE. A PAIR OF ANNULAR SEAT RINGS OF WEDGE SHAPE CROSS SECTION, FIT AGAINST AND CLAMPINGLY SECURE THE BALL THEREBETWEEN. A PAIR OF SEAT RING RETAINERS, HAVING SIDEWALLS INCLINED DOWNWARDLY AND INWARDLY, WEDGE THE BALL AND SEAT RINGS THEREBETWEEN. BONNET MEANS SELECTIVELY APPLIES PRESSURE TO THE SEAT RINGS AND THEREBY COMPRESSES THE SEAT RINGS TO THE BALL AND THE RETAINER SIDEWALLS.
Inventors
- 👤 John L Yopp
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |