US3841487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter device
Assignee: Individual
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Filing: 1972-05-15
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Granted: 1974-10-15
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Expires: 1992-05-15
Abstract
Abstract Device for purifying the surface and subsurface water in swimming pools, providing an easy means of examining the filter basket for the water taken in by suction from the bottom plug of the pool, at the same time enabling the filter circuit for the surface water to be isolated if necessary. The device, called a skimmer, comprises a first filter basket associated with a float and effecting the filtration of the surface water, a second filter basket situated underneath the first filter basket and filtering the water already filtered by the first filter basket and also the water taken in by suction by the bottom plug.
Inventors
- 👤 G Villette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/12; E04H4/1209; E04H4/1272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
263 words
In combination, a swimming pool and a swimming pool skimmer comprising, a body having a side opening for freely allowing surface water of said pool to flow into said body, a first strainer basket below the level of said opening disposed for receiving the surface water flowing into said body through said side opening and straining it, a second strainer basket below the level of said first strainer for receiving strained surface water from the first strainer, a float check valve disposed for stopping flow of water from the first strainer basket to the second strainer basket when the level of the water within the body reaches a selected level corresponding to a level in the vicinity of a level at which said float check valve is disposed, means defining an inlet in the bottom of the pool for flow into the second strainer of a supply of water other than said strained surface water for straining thereof, means for discharging from said second strainer through a common discharge outlet all the strained surface and strained other water for return to the swimming pool, and said float check vale being disposed below the first strainer and above the second strainer, said second strainer having an inlet on an upper end thereof over which said float check valve seats, and said float check valve seating entirely covering the last mentioned inlet when said level of the water obtains thereby isolating the first strainer from the second strainer and said inlet and discharge outlet while continuing to strain said other water in said second strainer.
Claim 2
Dependent Claim
263 words
In combination, a swimming pool and a swimming pool skimmer comprising, a body having a side opening for freely allowing surface water of said pool to flow into said body, a first strainer basket below the level of said opening disposed for receiving the surface water flowing into said body through said side opening and straining it, a second strainer basket below the level of said first strainer for receiving strained surface water from the first strainer, a float check valve disposed for stopping flow of water from the first strainer basket to the second strainer basket when the level of the water within the body reaches a selected level corresponding to a level in the vicinity of a level at which said float check valve is disposed, means defining an inlet in the bottom of the pool for flow into the second strainer of a supply of water other than said strained surface water for straining thereof, means for discharging from said second strainer through a common discharge outlet all the strained surface and strained other water for return to the swimming pool, and said float check vale being disposed below the first strainer and above the second strainer, said second strainer having an inlet on an upper end thereof over which said float check valve seats, and said float check valve seating entirely covering the last mentioned inlet when said level of the water obtains thereby isolating the first strainer from the second strainer and said inlet and discharge outlet while continuing to strain said other water in said second strainer.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |