US3761130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible chair
Assignee: Tenryu Industries Co Ltd
•
Filing: 1972-05-15
•
Granted: 1973-09-25
•
Expires: 1992-05-15
Abstract
Abstract A convertible chair is provided with a core body formed from assembled upper and lower shells that are produced by a rotary injection molding process. The shells are bonded together, and the upper shell may have molded foam material applied as a cushion over which a detachable cover is provided. Armrests may be provided as part of the upper shell, and chair legs may be formed as part of the lower shell.
Inventors
- 👤 S Suzuki
- 👤 S Koike
- 👤 F Aiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:11
CPC Classifications
A; A47; A47C; A47C4/00; A47C4/02; A47C4/028; A47C13/00; A47C3/00; A47C5/00; A47C5/12; Y; Y10; Y10S; Y10S297/00; Y10S297/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
95 words
A convertible chair comprising a core body having an upper hollow open bottomed shell and a lower hollow open topped shell, said upper shell comprising a closed seat portion and being rigidly supported on said lower shell, whereby a hollow space is defined between said seat portion and said lower shell; said upper shell being upwardly tapered with the hollow space therewithin being upwardly tapered; said lower shell being downwardly tapered with the hollow space therewithin being downwardly tapered; and a cover member covering at least a portion of said core body and detachable therefrom.
Claim 2
Dependent Claim
95 words
A convertible chair comprising a core body having an upper hollow open bottomed shell and a lower hollow open topped shell, said upper shell comprising a closed seat portion and being rigidly supported on said lower shell, whereby a hollow space is defined between said seat portion and said lower shell; said upper shell being upwardly tapered with the hollow space therewithin being upwardly tapered; said lower shell being downwardly tapered with the hollow space therewithin being downwardly tapered; and a cover member covering at least a portion of said core body and detachable therefrom.
Claim 3
Dependent Claim
21 words
A convertible chair according to claim 1 wherein molded foam material is disposed between said upper shell and said cover member.
Claim 4
Dependent Claim
14 words
A convertible chair according to claim 2 wherein said foam material is polyurethane resin.
Claim 5
Dependent Claim
24 words
A convertible chair according to claim 2 wherein said foam material is formed with a configuration corresponding to the configuration of said core body.
Claim 6
Dependent Claim
32 words
A convertible chair according to claim 1 wherein said upper shell comprises a back portion, and said hollow space defined by said seat portion and lower shell extends within said back portion.
Claim 7
Dependent Claim
41 words
A convertible chair according to claim 1 wherein said upper shell is provided with a back portion and armrest projections, and said hollow space defined by said seat portion and lower shell extends within said back section and said armrest projections.
Claim 8
Dependent Claim
14 words
A convertible chair according to claim 6 wherein said armrest projections are upwardly tapering.
Claim 9
Dependent Claim
18 words
A convertible chair according to claim 1 wherein said core body is formed of a rigid synthetic resin.
Claim 10
Dependent Claim
12 words
A convertible chair according to claim 8 wherein said resin is polyethylene.
Claim 11
Dependent Claim
22 words
A convertible chair according to claim 1 wherein a bonding material is provided to fasten said upper shell to said lower shell.
Claim 12
Dependent Claim
23 words
A convertible chair according to claim 1 wherein a plurality of legs are spacedly secured to a bottom surface of said lower shell.
Claim 13
Dependent Claim
33 words
A convertible chair according to claim 1 wherein a plurality of legs are formed as an integral bottom part of said lower shell, and said lower shell hollow space extends within said legs.
Claim 14
Dependent Claim
53 words
A convertible chair according to claim 1 wherein said upper shell has a downwardly extending lower edge portion, said lower shell has an upwardly extending upper edge portion, comprising means for joining said lower edge portion and said upper edge portion, said joining means comprising substantially the sole support of said upper shell.
Claim 15
Dependent Claim
16 words
The convertible chair of claim 1 wherein said upper and lower shells are unitary molded components.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |