US3555574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring loaded weir for pool skimmers
Assignee: Sta Rite Industries LLC
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Filing: 1969-08-07
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Granted: 1971-01-19
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Expires: 1989-08-07
Abstract
Abstract THE DISCLOSURE SHOWS A SPRING LOADED WEIR IN A SKIM TANK SYSTEM USED IN A SWIMMING POOL, THROUGH WHICH WATER IS CIRCULATED TO A FILTER. THE WEIR COMPRISES A SHEET OF SPRING MATERIAL SUCH AS LEAF SPRING FIXED AT ITS LOWER EDGE AT THE BOTTOM OF THE THROAT LEADING INTO THE SKIM TANK FROM THE POOL, AND IS PROVIDED AT ITS UPPER FREE EDGE WITH A LIP MEMBER WHICH IS OF A DENSITY AND DIMENSION TO CAUSE IT TO FLOAT AT THE SURFACE OF THE WATER WHEN THERE IS NO WATER FLOWING THROUGH THE TANK. WHEN WATER FLOWS FROM THE POOL TO THE TANK, AS WHEN A CIRCULATING PUMP IS TURNED ON, THE WEIR IS BENT DOWN SO THAT WATER CAN FLOW OVER THE LIP INTO THE TANK.
Inventors
- 👤 David A Stanwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:18
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; E04H4/1272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |