Closure valve
Abstract
Abstract FOLDED OVER ON ITSELF DURING SUCH MOVEMENT SO AS TO PERMIT A CIRCUMFERENTIAL FLANGE PROVIDED ON THE SEALING PLATE TO BE SEALED WITH SAID FLANGED PORTION. A LOCKING ARRANGEMENT MADE OF FLEXIBLE MATERIAL WHICH IS INSERTABLE IN AN OPENING OF A PLATE MEMBER, INCLUDING A FLANGED PORTION WITH AN AXIAL BORE THEREIN, A CYLINDRICAL BELLOWS SECURED AT ONE END TO THE FLANGED PORTION ALONG THE PERIPHERY OF ITS AXIAL BORE. THE BELLOWS HAS OUTLET OPENINGS TO PERMIT A FLOW AXIALLY THROUGH THE ARRANGEMENT, AND A SEALING PLATE IS PROVIDED AT THE OTHER END OF THE BELLOWS WHICH SERVES TO LIMIT THE FLOW THROUGH THE ARRANGEMENT BY BEING MOVABLE TOWARD THE FLANGED PORTION INTO SEALING ENGAGEMENT THEREWITH. THE BELLOWS IS
Inventors
- 👤 W Milde
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |