US3871033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool covers
Assignee: Individual
•
Filing: 1973-02-26
•
Granted: 1975-03-18
•
Expires: 1993-02-26
Abstract
Abstract A cover for the surface of the water in a swimming pool comprises a membrane the buoyancy of which can be varied from positive to negative and vice versa so that it either floats on the surface or lies on the bottom. The membrane may be flexible and formed with deflatable air pockets or may be rigid and the pockets arranged to be flooded.
Inventors
- 👤 Sidney Charles Leddra Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:16
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/06; E04H4/065; E04H4/10; E04H4/103
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
115 words
A cover for a swimming pool comprising: i. a flexible imperforate membrane weighted and shaped such that it will rest submerged on the bottom of the pool, ii. loading means on a single line joining opposite edges of the cover to define a weighted line across said membrane, iii. means defining air pockets carried by said membrane which when filled with air cause the membrane to float freely and evenly on the surface of the water in the pool and, iv. means for emptying said pockets of air to cause the membrane to sink firstly along said line weighted and the remainder of the membrane to bend upwards to allow water to by-pass the membrane.
Claim 2
Dependent Claim
115 words
A cover for a swimming pool comprising: i. a flexible imperforate membrane weighted and shaped such that it will rest submerged on the bottom of the pool, ii. loading means on a single line joining opposite edges of the cover to define a weighted line across said membrane, iii. means defining air pockets carried by said membrane which when filled with air cause the membrane to float freely and evenly on the surface of the water in the pool and, iv. means for emptying said pockets of air to cause the membrane to sink firstly along said line weighted and the remainder of the membrane to bend upwards to allow water to by-pass the membrane.
Claim 3
Dependent Claim
50 words
A cover as claimed in claim 1 wherein the cover is provided with hoses connecting points on its periphery with contiguous anchorage points on the edge of the pool, each line being of a length to just reach the bottom of the pool when hanging vertically from its anchorage point.
References Cited (Backward Citations)
US1918437A
Cited
US3000017A
Cited
US3184764A
Cited
US3313443A
Cited
US3423768A
Cited
US3366977A
Cited
US3579657A
Cited
US3734113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |