Membrane valve for spray containers
Abstract
Abstract MEMBRANE VALVE FOR SPRAY CONTAINERS INCLUDES A SUBSTANTIALLY PLATE-SHAPED MEMBER HAVING A MARGINAL EDGE ADAPTED TO BE RETAINED UNDER STRESS SUBSTANTIALLY AT THE WALL OF A SPRAY CONTAINER, THE PLATE-SHAPED MEMBER HAVING AS FLEXIBLE ANNULAR ZONE BETWEEN THE MARGINAL EDGE AND A CENTER PORTION THEREOF, THE FLEXIBLE, ANNULAR ZONE BEING FORMED WITH AN OPENING THERETHROUGH, AN ANNULAR SEALING LIP FORMED ON ONE SIDE OF THE PLATE-SHAPED MEMBER AROUND THE CENTER PORTION THEREOF AND BEING PRESTRESSED INTO ENGAGEMENT WITH A VALVE SEAT AND DEFINING A CLOSED CHAMBER THEREWITH AND MEANS FOR DISENGAGING THE ANNULAR SEALING LIP FROM THE VALVE SO AS TO PROVIDE COMMUNICATION BETWEEN THE CHAMBER AND THE OTHER SIDE OF THE PLATE-SHAPED MEMBER THROUGH THE OPENING IN THE FLEXIBLE ANNULAR ZONE THEREOF.
Inventors
- 👤 Walter Baltzer
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |