Filter tank having replaceable filter cartridges
Abstract
Abstract APPARATUS ENABLING REMOTE REMOVAL OF A PLURALITY OF ANNULAR FILTER CARTRIDGES FROM A TANK INCLUDES A WRENCHING PORTION ON TOP OF EACH CARTRIDGE, ENABLING IT TO BE EASILY TURNED AND UNSEATED BY AN OPERATOR OUTSIDE THE TANK. A CARTRIDGE LOCATING PLATE HAVING A PLURALITY OF APERTURES IS POSITIONED TO FIT OVER THE WRENCHING PORTIONS, WHILE PERMITTING THEM TO BE TOTRATED. EACH WRENCHING PORTION INCLUDES RELEASE MEANS WHICH PREVENT THE CARTRIDGE FROM FROPPING FROM THE PLATE, SO THAT THE PLATE AND CARTRIDGES MAY BE LIFTED TOGETHER AND REMOVED FROM THE TANK. THE RELEASE MEANS PERMIT THE EASY REMOVAL OF THE CARTRIDGES FROM THE PLATE AFTER REMOVAL FROM THE TANK. THE FILTERS CARTRIDGES MAY BE SCREW-MOUNTED ON THE SEAT MEANS, OR NOVEL MOUNTING MEANS MAY BE EMPLOYED. THESE NOVEL MOUNTING MEANS INCLUDE A CARTRIDGE RECEIVER ON TOP OF THE SEAT MEANS, AND HAVING A CAM SLOT, TOGETHER WITH UPWARDLY BIASED CAM FOLLOWER MEANS ON THE BOTTOM OF THE FILTER CARTRIDGE.
Inventors
- 👤 Alfonse J Soriente
- 👤 Stanley H Wapner
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |