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US4166296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air supply system for therapeutic pool
Assignee: Individual
•
Filing: 1978-03-31
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Granted: 1979-09-04
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Expires: 1998-03-31
Abstract
Abstract An air supply system for a therapeutic pool which allows placement of the air blower at a level below the water surface without danger of damage by water backflow. A check valve prevents gross water backflow to the blower, and a float valve between the check valve and the blower automatically drains any leakage of water through the check valve. The float valve is placed between the check valve and the blower in a manner so as to receive all leakage.
Inventors
- 👤 John L. Darrah
- 👤 John C. Darrah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:09
CPC Classifications
A; A47; A47K; A47K3/00; A47K3/10; A61; A61H; A61H33/00; A61H33/02; A61H2033/023; A61H33/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
An air supply system for a therapeutic pool which comprises: an air blower; conduit means for conducting air from said blower to said pool, said air entering said pool through a plurality of orifices below the surface of said pool; a check valve in said conduit means for resisting the flow of water from said pool toward said blower; and a float valve coupled to said conduit means between said blower and said check valve whereby any leakage of water through said check valve will flow into said float valve, said float valve comprising: a horizontal valve seat, and a closure for said valve seat having a density less than water whereby said valve will open when water flows thereto.
Claim 2
Dependent Claim
120 words
An air supply system for a therapeutic pool which comprises: an air blower; conduit means for conducting air from said blower to said pool, said air entering said pool through a plurality of orifices below the surface of said pool; a check valve in said conduit means for resisting the flow of water from said pool toward said blower; and a float valve coupled to said conduit means between said blower and said check valve whereby any leakage of water through said check valve will flow into said float valve, said float valve comprising: a horizontal valve seat, and a closure for said valve seat having a density less than water whereby said valve will open when water flows thereto.
Claim 3
Dependent Claim
24 words
An air supply system as recited in claim 1 wherein said horizontal valve seat is a tapered seat and said closure is substantially spherical.
Claim 4
Dependent Claim
20 words
An air supply system as recited in claims 1 or 2 wherein said closure is a ball made of elastomer.
Claim 5
Dependent Claim
90 words
In an air supply system for a therapeutic pool which includes means for inhibiting water from said pool from reaching the source of air, means for draining water from the normally dry portion of the piping of said air supply system which comprises a float valve at a low point of said nominally dry piping comprising a horizontal valve seat and a ball closure therefor, said ball having a density less than water whereby said ball closure will float and allow any water accumulating on said valve seat to drain.
Claim 6
Dependent Claim
90 words
In an air supply system for a therapeutic pool which includes means for inhibiting water from said pool from reaching the source of air, means for draining water from the normally dry portion of the piping of said air supply system which comprises a float valve at a low point of said nominally dry piping comprising a horizontal valve seat and a ball closure therefor, said ball having a density less than water whereby said ball closure will float and allow any water accumulating on said valve seat to drain.
Claim 7
Dependent Claim
42 words
The improvement as recited in claim 4 and further including a check valve in said piping between said float valve and said pool whereby said check valve will prevent flow of substantial amounts of water from said pool to said float valve.
References Cited (Backward Citations)
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Cited
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US3286712A
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US3417747A
Cited
US3736922A
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US3805772A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |