Patent US3239848A successfully refreshed from Google Patents.
US3239848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush control unit
Assignee: Radiator Specialty Co
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Filing: 1964-04-06
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Granted: 1966-03-15
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Expires: 1984-04-06
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Zrolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/304; E03D1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN A FLUSH CONTROL UNIT FOR INSTALLATION IN A TOILET FLUSH TANK TO CONTROL THE RELEASE OF FLUSH WATER THEREFROM BY PROVIDING A TANK BALL PIVOTALLY MOUNTED ON AN OVERFLOW STAND PIPE IN SAID TANK FOR SELECTIVE PIVOTING BETWEEN A FIRST POSITION SEATED ON AND SEALING THE CIRCUMFERENTIAL RIM OF A DRAIN OUTLET IN SAID TANK AND A SECOND DISPLACED POSITION CLEAR OF SAID DRAIN OUTLET AND THE RIM THEREOF, THE IMPROVEMENT WHICH COMPRISES THE FORMATION OF SAID TANK BALL WITH AN ANNULAR CUSHION STRUCTURE PRESENTING AN ANNULAR SURFACE PORTION FOR SEALING CONTACT WITH SAID DRAIN OUTLET RIM, SAID SURFACE PORTION BEING SUBSTANTIALLY WIDER THAN THE WIDTH OF SAID RIM, AND SAID ANNULAR CUSHION STRUCTURE ADDITIONALLY INCORPORATING MEANS FOR BEARING AT THE OPPOSITE ANNULAR EDGES OF SAID ANNULAR SURFACE PORTION TO CONCENTRATE THE GRAVITY HEAD OF WATER STORED IN SAID TANK SUBSTANTIALLY AT THE OPPOSITE EDGES OF SAID ANNULAR SURFACE PORTION AND THEREBY DEFORMING SAID SURFACE PORTION OVER SAID RIM FOR EFFECTIVE SEALING THEREAT.
Claim 2
Dependent Claim
164 words
IN A FLUSH CONTROL UNIT FOR INSTALLATION IN A TOILET FLUSH TANK TO CONTROL THE RELEASE OF FLUSH WATER THEREFROM BY PROVIDING A TANK BALL PIVOTALLY MOUNTED ON AN OVERFLOW STAND PIPE IN SAID TANK FOR SELECTIVE PIVOTING BETWEEN A FIRST POSITION SEATED ON AND SEALING THE CIRCUMFERENTIAL RIM OF A DRAIN OUTLET IN SAID TANK AND A SECOND DISPLACED POSITION CLEAR OF SAID DRAIN OUTLET AND THE RIM THEREOF, THE IMPROVEMENT WHICH COMPRISES THE FORMATION OF SAID TANK BALL WITH AN ANNULAR CUSHION STRUCTURE PRESENTING AN ANNULAR SURFACE PORTION FOR SEALING CONTACT WITH SAID DRAIN OUTLET RIM, SAID SURFACE PORTION BEING SUBSTANTIALLY WIDER THAN THE WIDTH OF SAID RIM, AND SAID ANNULAR CUSHION STRUCTURE ADDITIONALLY INCORPORATING MEANS FOR BEARING AT THE OPPOSITE ANNULAR EDGES OF SAID ANNULAR SURFACE PORTION TO CONCENTRATE THE GRAVITY HEAD OF WATER STORED IN SAID TANK SUBSTANTIALLY AT THE OPPOSITE EDGES OF SAID ANNULAR SURFACE PORTION AND THEREBY DEFORMING SAID SURFACE PORTION OVER SAID RIM FOR EFFECTIVE SEALING THEREAT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |