Patent US4665572A successfully refreshed from Google Patents.
US4665572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool therapy apparatus
Assignee: SWIM GYM Inc
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Filing: 1986-10-30
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Granted: 1987-05-19
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Expires: 2006-10-30
Abstract
Abstract A therapy apparatus to be mounted in a pool of water for generating a laminar flow of water at a rate sufficient for exercising and therapy purposes. A housing is secured externally to a swimming pool, the water inlet and outlet being disposed within the pool of water and being supported by the external housing. The water inlet is located below the surface of the swimming pool, water being forced through the inlet and upwardly by a rotating impeller to the outlet. The water outlet is below the water surface and directs the flow of water substantially parallel to the surface of the swimming pool and at an angle of approximately 90 degrees of arc with respect to the flow at the impeller. Sets of radial, elbow and outlet diffusers are mounted within the water flow chamber to create a laminar flow of water at the output and substantially eliminate all unwanted turbulance.
Inventors
- 👤 Peter Davidson
- 👤 Gretchen Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:09
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/12; A63B69/125; A61; A61H; A61H33/00; A61H33/0087; A61H33/0091; F; F04; F04D; F04D3/00; F04D3/005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
273 words
Apparatus for generating a laminar flow in a reservoir containing water, said apparatus comprising: drive motor means disposed outside said reservoir; flow generating means disposed within said reservoir and submerged in the water therein; said flow generating means including an upper section nearest the surface of the water, a lower section submerged the farthest beneath the surface of the water, and an intermediate section between said upper and lower sections; said lower section having a water inlet therein to permit water to be drawn into said flow directing means and said upper section having a water outlet therein to permit water to be discharged from said flow directing means in a laminar flow pattern; impeller means disposed within said flow generating means above said water inlet; said flow generating means including three separate stages of flow diffusing means disposed between said impeller means and said water outlet, defining a first, second and third stage; each of said separate stages of flow diffusing means including a plurality of spaced vane members across which water passes as it traverses through said flow generating means from said water inlet to said water outlet; and means operatively connecting said impeller means to said drive motor means whereby operation of said drive motor means rotates said impeller means and thereby draws water from said reservoir into said water inlet; said operation of said impeller means further causing the water drawn in through said water inlet to pass across said three separate stages of flow diffusing means, which serve to laminarize the flow characteristics of the water, and then to discharge through said water outlet as non-turbulent laminar flow.
Claim 2
Dependent Claim
273 words
Apparatus for generating a laminar flow in a reservoir containing water, said apparatus comprising: drive motor means disposed outside said reservoir; flow generating means disposed within said reservoir and submerged in the water therein; said flow generating means including an upper section nearest the surface of the water, a lower section submerged the farthest beneath the surface of the water, and an intermediate section between said upper and lower sections; said lower section having a water inlet therein to permit water to be drawn into said flow directing means and said upper section having a water outlet therein to permit water to be discharged from said flow directing means in a laminar flow pattern; impeller means disposed within said flow generating means above said water inlet; said flow generating means including three separate stages of flow diffusing means disposed between said impeller means and said water outlet, defining a first, second and third stage; each of said separate stages of flow diffusing means including a plurality of spaced vane members across which water passes as it traverses through said flow generating means from said water inlet to said water outlet; and means operatively connecting said impeller means to said drive motor means whereby operation of said drive motor means rotates said impeller means and thereby draws water from said reservoir into said water inlet; said operation of said impeller means further causing the water drawn in through said water inlet to pass across said three separate stages of flow diffusing means, which serve to laminarize the flow characteristics of the water, and then to discharge through said water outlet as non-turbulent laminar flow.
Claim 3
Dependent Claim
48 words
Apparatus as defined in claim 1 wherein said first stage of flow diffusing means is disposed within said intermediate section above said impeller means to counteract cavitational effects caused by operation of said impeller means and to initialize the laminarization of water flow through said flow generating means.
Claim 4
Dependent Claim
27 words
Apparatus as defined in claim 2 wherein said second stage of said flow diffusing means is located substantially at the intersection of said intermediate and upper sections.
Claim 5
Dependent Claim
25 words
Apparatus as defined in claim 3 wherein said third stage of said flow diffusing means is disposed in said upper section adjacent the water outlet.
Claim 6
Dependent Claim
23 words
Apparatus as defined in claim 3 wherein the vane members forming said second stage consist of a plurality of spaced arcuately curved members.
Claim 7
Dependent Claim
36 words
Apparatus as defined in claim 4 wherein the vane members forming said third stage consist of a plurality of spaced vane members disposed in substantially parallel relation to the surface of the water in said reservoir.
Claim 8
Dependent Claim
43 words
Apparatus as defined in claim 1 wherein said upper section expands in size as it extends from its intersection with said intermediate section to the water outlet to cause a reduction in the rate of water flow between said second and third stages.
Claim 9
Dependent Claim
29 words
Apparatus as defined in claim 1 wherein the end of said upper section forming said water outlet slopes angularly downward from the surface of the water in said reservoir.
Claim 10
Dependent Claim
42 words
Apparatus as defined in claim 1 wherein said means operatively connecting said impeller means to said drive motor means includes a substantially vertically extending shaft projecting upwardly through said flow generating means and above the surface of the water in said reservoir.
Claim 11
Dependent Claim
37 words
Apparatus as defined in claim 9 wherein said means operatively connecting said impeller means to said drive motor means further includes a substantially horizontal drive belt mechanism operatively connected between said drive motor means and said shaft.
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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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |