US3851914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible chair
Assignee: Individual
•
Filing: 1972-10-30
•
Granted: 1974-12-03
•
Expires: 1992-10-30
Abstract
Abstract A collapsible chair having a pair of frameworks pivotally coupled together so as to be able to fold inwardly along the center line of the chair and a flexible membrane carried by a pair of rods which are fixed to the inside of the frameworks for holding the membrane in proper position for supporting a person when the chair is erected, or unfolded, for use.
Inventors
- 👤 T Nii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:45
CPC Classifications
A; A47; A47C; A47C4/00; A47C4/28; A47C4/30; A47C4/283; A47C5/00; A47C5/04; A47C5/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A collapsible chair comprising: a pair of frameworks each having legs and an arm pivotally mounted on the upper end of said legs, said frameworks being coupled together by a connecting means so as to permit folding of the frameworks inwardly along the center line of said chair; a thin flexible membrane having folds at each of its sides defining elongated tubular formations; and a pair of rods inserted into said elongated tubular formations to carry said flexible membrane therebetween, said rods being curved at an angle to form integral seat and backrest portions with said flexible membrane stretched therebetween and being fixed to the inside of said arms of said frameworks in at least two places.
Claim 2
Dependent Claim
117 words
A collapsible chair comprising: a pair of frameworks each having legs and an arm pivotally mounted on the upper end of said legs, said frameworks being coupled together by a connecting means so as to permit folding of the frameworks inwardly along the center line of said chair; a thin flexible membrane having folds at each of its sides defining elongated tubular formations; and a pair of rods inserted into said elongated tubular formations to carry said flexible membrane therebetween, said rods being curved at an angle to form integral seat and backrest portions with said flexible membrane stretched therebetween and being fixed to the inside of said arms of said frameworks in at least two places.
Claim 3
Dependent Claim
48 words
A collapsible chair according to claim 1, wherein the legs of each of said frameworks are substantially U-shaped in configuration and said frameworks are pivotally coupled together by pivot pins near the middle of the respective longitudinal side portions of said framework legs in a generally X-shaped coupling.
Claim 4
Dependent Claim
57 words
A collapsible chair according to claim 1, wherein said arms of said frameowrks include arcuate channels formed on the underside thereof which register with longitudinal slots provided in both end surfaces of each of said arms and extending into the inside of said arms, and said arms are pivotally mounted on said upper ends of said legs.
Claim 5
Dependent Claim
44 words
A collapsible chair according to claim 1, wherein said seat and backrest portions of the chair are inclined backward, and the rear most portion of said seat is positioned below said places where said flexible membrane is fixed on said arms through said rods.
Claim 6
Dependent Claim
14 words
A collapsible chair according to claim 2, wherein said arms are cylindrical in configuration.
Claim 7
Dependent Claim
15 words
A collapsible chair according to claim 2, wherein said arms have an inverted U-shaped configuration.
References Cited (Backward Citations)
US598698A
Cited
US1110162A
Cited
US3019051A
Cited
US3071409A
Cited
US3310343A
Cited
US3331629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |