US3780385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool cover
Assignee: Individual
•
Filing: 1972-11-01
•
Granted: 1973-12-25
•
Expires: 1992-11-01
Abstract
Abstract A swimming pool unitary liner and cover comprising a first swimming pool liner and a second swimming pool liner attached circumferentially to the first liner''s interior vertical surface, the second liner defining the pool bottom in a lowered position and forming with said first liner a watertight compartment which compartment, when filled with water, displaces the second liner upward whereby the second liner acts as a swimming pool cover. Water is introduced into the compartment through a hose fitting in one of the liners, and preferably the second liner. The water which is introduced into the compartment may optionally be the swimming pool water which is located upward of the second liner.
Inventors
- 👤 R Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/06; E04H4/065
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A swimming pool unitary liner and cover comprising a first swimming pool liner of flexible material having a vertical portion and a bottom portion, a second liner of flexible material attached circumferentially to the interior vertical surface of the first swimming pool liner, said first and second liners being adapted to form a watertight compartment between said liners, a means for introducing and withdrawing water from said compartmnent located in one of said liners, the size and disposition of said second liner being such that when water is introduced into the compartment between said liners the second liner extends upward of its locus of attachment whereby it acts as a pool cover.
Claim 2
Dependent Claim
112 words
A swimming pool unitary liner and cover comprising a first swimming pool liner of flexible material having a vertical portion and a bottom portion, a second liner of flexible material attached circumferentially to the interior vertical surface of the first swimming pool liner, said first and second liners being adapted to form a watertight compartment between said liners, a means for introducing and withdrawing water from said compartmnent located in one of said liners, the size and disposition of said second liner being such that when water is introduced into the compartment between said liners the second liner extends upward of its locus of attachment whereby it acts as a pool cover.
Claim 3
Dependent Claim
21 words
A swimming pool unitary liner and cover of claim 1 further characterized in that the flexible material is a vinyl plastic.
Claim 4
Dependent Claim
105 words
The swimming pool unitary liner and cover of claim 1 further characterized in that the means of introducing and withdrawing water from the compartment is a hose fitting which is connected to a water pump means by a first water hose said pump means in turn being connected to the interior of said swimming pool unit located upward of said second liner by a second water hose, whereby when said unit is filled for swimming and the second liner is in the lowered position the second liner can be raised to cover the unit by pumping water located upward of said pool into said compartment.
Claim 5
Dependent Claim
125 words
In combination with a swimming pool unit including side vertical walls and a bottom wall an improved safety pool cover comprising a flexible material attached circumferentially to the interior side vertical walls, said pool cover extending downwardly from the locus of attachment and having a vertical portion and a bottom portion when in lowered position, said pool cover being adapted to form a compartment with the vertical and bottom walls of the swimming pool unit when in an upward position, a means for introducing and withdrawing water from said compartment, the size and locus of attachment of said cover being such that when water is introduced into the compartment the cover extends upward of its locus of attachment whereby it acts as a pool cover.
Claim 6
Dependent Claim
125 words
In combination with a swimming pool unit including side vertical walls and a bottom wall an improved safety pool cover comprising a flexible material attached circumferentially to the interior side vertical walls, said pool cover extending downwardly from the locus of attachment and having a vertical portion and a bottom portion when in lowered position, said pool cover being adapted to form a compartment with the vertical and bottom walls of the swimming pool unit when in an upward position, a means for introducing and withdrawing water from said compartment, the size and locus of attachment of said cover being such that when water is introduced into the compartment the cover extends upward of its locus of attachment whereby it acts as a pool cover.
Claim 7
Dependent Claim
44 words
The combination of claim 4 further characterized in that the means of introducing and withdrawing fluid from said compartment is connected with a means for withdrawing water from the swimming pool unit located upwards of the cover and introducing the water into said compartment.
Claim 8
Dependent Claim
42 words
The combination of claim 4 further characterized in that the means for introducing and withdrawing fluid from said compartment is connected to a means for withdrawing water from said compartment and introducing the water into the pool unit upwards of the cover.
Claim 9
Dependent Claim
95 words
The combination of claim 4 further characterized in that the means of introducing and withdrawing fluid from the compartment is a hose fitting connected to a water pump by a first water hose, said pump means in turn being connected to the interior of said swimming pool unit located upward of said pool cover by a second water hose, whereby when said unit is filled for swimming and the cover is in the lowered position the cover can be raised to cover the unit by pumping water located upward of said cover into said compartment.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |