US3724008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterbed bedstead
Assignee: Individual
•
Filing: 1971-08-26
•
Granted: 1973-04-03
•
Expires: 1991-08-26
Abstract
Abstract The waterbed bedstead in its preferred form is essentially a containment tank to hold a plastic bag containing water, or water and other materials, to produce a water mattress. The containment tank section is formed of a thermoplastic material which is leak proof, should the water mattress be punctured, cut or for any other reason fail to contain the liquid. It also supplies a dead air space for thermal insulation. The containment tank section preferably rests on a base section containing a polystyrene foam member which not only supports the weight of the water mattress but distributes the weight over a large area. The base section also gives full peripheral support to the tank section.
Inventors
- 👤 W Golden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:16
CPC Classifications
A; A47; A47C; A47C19/00; A47C19/02; A47C19/021; A47C19/025; A47C27/00; A47C27/08; A47C27/085; Y; Y10; Y10S; Y10S5/00; Y10S5/915
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
102 words
A water bedstead comprising a containment tank for receiving the inflated waterbed envelope and capable of holding the volume of water used in the inflation in case of leak or puncture, said containment tank being formed with a spaced double wall at the perimeter thereof, a polystyrene foam base of substantial thickness for supporting the bottom of said containment tank and a frame for said base having an inturned peripheral ledge adjacent the top thereof for supporting the wall of the outer perimeter of said containment tank, and with the portion of the frame above said ledge confining the perimeter said tank.
Claim 2
Dependent Claim
102 words
A water bedstead comprising a containment tank for receiving the inflated waterbed envelope and capable of holding the volume of water used in the inflation in case of leak or puncture, said containment tank being formed with a spaced double wall at the perimeter thereof, a polystyrene foam base of substantial thickness for supporting the bottom of said containment tank and a frame for said base having an inturned peripheral ledge adjacent the top thereof for supporting the wall of the outer perimeter of said containment tank, and with the portion of the frame above said ledge confining the perimeter said tank.
Claim 3
Dependent Claim
43 words
The water bedstead of claim 1 wherein the containment tank is formed from a single sheet of waterproof plastic and the polystyrene base is confined within a peripheral frame between the inturned ledge at the top and the inturned ledge at the bottom.
Claim 4
Dependent Claim
28 words
The water bedstead of claim 2 wherein the containment tank, the polystyrene base and the peripheral frame are of uniform shape for ready assembly into a unitary structure.
References Cited (Backward Citations)
US3585356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |