US3879598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sofa bed construction
Assignee: Individual
•
Filing: 1974-02-11
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Granted: 1975-04-22
•
Expires: 1994-02-11
Abstract
Abstract A sofa bed construction wherein a sofa frame is provided which includes a liquid tank fixedly attached within the frame. A liquid fillable mattress, which is stored in a collapsed position within a storage compartment within the sofa frame, is to be fillable with liquid from the tank. When filled, the mattress is located on a supporting surface adjacent the sofa frame. The liquid filled mattress is to include a peripheral air frame for providing lateral support for the liquid filled mattress.
Inventors
- 👤 Michael E Darling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:25
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/081; A47C17/00; A47C17/04; A47C17/22; A47C27/085; H; H05; H05B; H05B3/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
114 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress connected to said sofa frame having a valve for supplying liquid into said mattress, said mattress being spaced from said tank, a conduit interconnecting said tank and said mattress, said conduit to conduct liquid between said tank and said mattress; and pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress through said conduit, said pump means also to effect return of said liquid from said mattress into said tank.
Claim 2
Dependent Claim
114 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress connected to said sofa frame having a valve for supplying liquid into said mattress, said mattress being spaced from said tank, a conduit interconnecting said tank and said mattress, said conduit to conduct liquid between said tank and said mattress; and pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress through said conduit, said pump means also to effect return of said liquid from said mattress into said tank.
Claim 3
Dependent Claim
114 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress connected to said sofa frame having a valve for supplying liquid into said mattress, said mattress being spaced from said tank, a conduit interconnecting said tank and said mattress, said conduit to conduct liquid between said tank and said mattress; and pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress through said conduit, said pump means also to effect return of said liquid from said mattress into said tank.
Claim 4
Dependent Claim
114 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress connected to said sofa frame having a valve for supplying liquid into said mattress, said mattress being spaced from said tank, a conduit interconnecting said tank and said mattress, said conduit to conduct liquid between said tank and said mattress; and pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress through said conduit, said pump means also to effect return of said liquid from said mattress into said tank.
Claim 5
Dependent Claim
35 words
The sofa bed construction as defined in claim 1 wherein: said tank being positioned adjacent the bottom of said sofa frame between the bottom of said sofa frame and the seating area of said sofa.
Claim 6
Dependent Claim
43 words
The sofa bed construction as defined in claim 1 wherein: electrical heating means connected to said tank, whereby the temperature of the liquid contained within said tank can be raised to a desirable temperature prior to being supplied into said liquid fillable mattress.
Claim 7
Dependent Claim
131 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and a storage compartment located interiorly of said sofa frame and located adjacent the lower front of said sofa frame, an access cover provided into said storage compartment, when said liquid fillable mattress does not contain any liquid said mattress is capable of being folded and compactly stored in said storage compartment.
Claim 8
Dependent Claim
131 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and a storage compartment located interiorly of said sofa frame and located adjacent the lower front of said sofa frame, an access cover provided into said storage compartment, when said liquid fillable mattress does not contain any liquid said mattress is capable of being folded and compactly stored in said storage compartment.
Claim 9
Dependent Claim
109 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and an air ventilation tube extending within said tank at a high point of said tank, said air ventilation tube also providing access of water purification tablets into said tank.
Claim 10
Dependent Claim
109 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and an air ventilation tube extending within said tank at a high point of said tank, said air ventilation tube also providing access of water purification tablets into said tank.
Claim 11
Dependent Claim
127 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and said tank being inclined with respect to said sofa, whereby when said sofa frame is supported upon a horizontal surface the back end Of said tank is displaced higher than the front end of said tank to facilitate substantially complete removal of the liquid from said tank.
Claim 12
Dependent Claim
127 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and said tank being inclined with respect to said sofa, whereby when said sofa frame is supported upon a horizontal surface the back end Of said tank is displaced higher than the front end of said tank to facilitate substantially complete removal of the liquid from said tank.
Claim 13
Dependent Claim
110 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and a gas chamber laterally surrounding said mattress, blower means communicating with said gas chamber for inflating said gas chamber, said gas chamber providing lateral support for said liquid fillable mattress.
Claim 14
Dependent Claim
110 words
A sofa bed construction comprising: a sofa frame; a liquid tank included within said sofa frame, said tank adapted to retain a quantity of liquid; a liquid fillable mattress having a valve for supplying liquid into said mattress; pump means connectable between said tank and said mattress, said pump means to remove the liquid from said tank and supply such into said mattress, said pump means also to effect return of said liquid from said mattress into said tank; and a gas chamber laterally surrounding said mattress, blower means communicating with said gas chamber for inflating said gas chamber, said gas chamber providing lateral support for said liquid fillable mattress.
Claim 15
Dependent Claim
23 words
The sofa bed construction as defined in claim 6 wherein: said blower means and said pump means being mounted within said sofa frame.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |