Patent US2716306A successfully refreshed from Google Patents.
US3076973A
Expired / Lapsed
US
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Delayed action drain valve
Assignee: Scovill Inc
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Filing: 1960-12-02
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Granted: 1963-02-12
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Expires: 1980-12-02
Abstract
No abstract record available.
Inventors
- 👤 John F Lengyel
- 👤 Edward H Barlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:42
CPC Classifications
E; E03; E03D; E03D1/00; E03D1/30; E03D1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN OUTLET VALVE MECHANISM FOR DRAIN OPENINGS OF FLUSH TANKS AND THE LIKE, HAVING IN COMBINATION A BALL FLOAT VALVE, A RESERVOIR BOWL HELD IN ELEVATED POSITION IN AXIAL ALIGNMENT WITH SAID DRAIN OPENING AND HAVING A SMALL DRAIN OPENING IN ITS BASE, A FLOAT OPERATING WITHIN SAID BOWL, A LIFT ROD ATTACHED TO SAID FLOAT VALVE AND HAVING A SLIDABLE CONNECTION WITH SAID FLOAT, A STOP ON SAID ROD AGAINST WHICH SAID FLOAT IN ITS UPWARD BUOYANT STATE NORMALLY ABUTS, AND A STOP ON SAID BOWL LIMITING THE UPWARD MOVEMENT OF SAID BALL FLOAT VALVE DURING THE FLUSHING OPERATION, THE BUOYANCY FACTOR OF BOTH THE FLOAT AND BALL VALVE SERVING TO HOLD THE LATTER IN ELEVATED POSITION AGAINST THE DOWNWARD DRAG FORCE OF THE WATER PASSING THROUGH THE TANK DRAIN OPENING DURING THE FLUSHING CYCLE.
Claim 2
Dependent Claim
136 words
AN OUTLET VALVE MECHANISM FOR DRAIN OPENINGS OF FLUSH TANKS AND THE LIKE, HAVING IN COMBINATION A BALL FLOAT VALVE, A RESERVOIR BOWL HELD IN ELEVATED POSITION IN AXIAL ALIGNMENT WITH SAID DRAIN OPENING AND HAVING A SMALL DRAIN OPENING IN ITS BASE, A FLOAT OPERATING WITHIN SAID BOWL, A LIFT ROD ATTACHED TO SAID FLOAT VALVE AND HAVING A SLIDABLE CONNECTION WITH SAID FLOAT, A STOP ON SAID ROD AGAINST WHICH SAID FLOAT IN ITS UPWARD BUOYANT STATE NORMALLY ABUTS, AND A STOP ON SAID BOWL LIMITING THE UPWARD MOVEMENT OF SAID BALL FLOAT VALVE DURING THE FLUSHING OPERATION, THE BUOYANCY FACTOR OF BOTH THE FLOAT AND BALL VALVE SERVING TO HOLD THE LATTER IN ELEVATED POSITION AGAINST THE DOWNWARD DRAG FORCE OF THE WATER PASSING THROUGH THE TANK DRAIN OPENING DURING THE FLUSHING CYCLE.
References Cited (Backward Citations)
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Cited
US1225278A
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US1895786A
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US2527909A
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US2740129A
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US2908018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |