Patent US4330893A successfully refreshed from Google Patents.
US4330893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water bed
Assignee: Individual
•
Filing: 1979-10-22
•
Granted: 1982-05-25
•
Expires: 1999-10-22
Abstract
Abstract A water bed employing a mattress in the form of a water-tight bag of flexible sheet material and having means for restricting swelling deformations in the peripheral portion of the top sheet of the bag.
Inventors
- 👤 Ichinosuke Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:50
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/087; A47C27/085
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
A water bed comprising a mattress in the form of a water-tight bag having at least the top side thereof formed of a flexible sheet material, said top side being composed of a flexible center portion sufficient to be occupied by a sleeper so as to facilitate supporting every part of the sleeper's body uniformly and a less flexible peripheral portion formed by providing means for restricting swelling deformation of the peripheral portion to prevent oppression against the sleeper caused by the swelling of the peripheral portion adjacent the sleeper's body due to the weight of the sleeper on said flexible portion, said restricting means being constituted by an increased thickness in said peripheral portion as compared with the center portion of said top sheet of said bag.
Claim 2
Dependent Claim
128 words
A water bed comprising a mattress in the form of a water-tight bag having at least the top side thereof formed of a flexible sheet material, said top side being composed of a flexible center portion sufficient to be occupied by a sleeper so as to facilitate supporting every part of the sleeper's body uniformly and a less flexible peripheral portion formed by providing means for restricting swelling deformation of the peripheral portion to prevent oppression against the sleeper caused by the swelling of the peripheral portion adjacent the sleeper's body due to the weight of the sleeper on said flexible portion, said restricting means being constituted by an increased thickness in said peripheral portion as compared with the center portion of said top sheet of said bag.
Claim 3
Dependent Claim
29 words
A water bed as defined in claim 1, wherein said top sheet of said bag has a raised area in the center portion thereof which receives a sleeper's body.
References Cited (Backward Citations)
US1306787A
Cited
US1382831A
Cited
US3206776A
Cited
US3736604A
Cited
US3722012A
Cited
US3848282A
Cited
US4167795A
Cited
US4193151A
Cited
US4245364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |