Patent US3863698A successfully refreshed from Google Patents.
US3863698A
Expired / Lapsed
US
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Chair with a detachable seat
Assignee: Uchida Sharyo Co Ltd
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Filing: 1974-01-04
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Granted: 1975-02-04
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Expires: 1994-01-04
Abstract
Abstract A chair made of a tubular steel comprises a frame assembly including a pair of lateral bars having a plurality of engaging holes; a flexible seat detachably fixed to the lateral bars and having at each side thereof a bag-like portion formed by being folded back upon itself; and wire-like bars each having two groups of projections and adapted to be inserted into the baglike portion to permit the projections of one group to be engaged with the associated holes of the lateral bar and the projections of the other group different in a relative angle from those of one group to be forcibly engaged with the associated holes of the lateral bar, in a direction that the relative angle to the projections of one group is decreased, whereby the seat is detachably fixed to the lateral bar.
Inventors
- 👤 Suekichi Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:48
CPC Classifications
A; A47; A47C; A47C5/00; A47C5/04; A47C5/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
209 words
A chair having a detachable seat comprising in combination a. a frame assembly including a pair of side frames and a pair of lateral bars rigidly connected to the respective side frames, said respective lateral bars having a plurality of engaging holes longitudinally arranged in a line and spaced apart at predetermined intervals; b. a seat having both sides doubled back to provide bag-like portions adapted to be wrapped around the respective lateral bars; and c. a pair of fixing bars inserted into the respective bag-like portions of the seat and having two groups of engaging projections projecting normal to the axis of the fixing bar and engaged in said engaging holes of the lateral bar; d. said fixing bars, prior to assembly, having one group of the engaging projections differing in a relative angle from the other group of engaging projections so that, when the engaging projections of said one group are engaged with the respective holes of said lateral bars, the engaging projections of said other group are forced into the corresponding holes of said lateral bars, in a direction that the relative angle to the projections of said one group is decreased, whereby the seat is removably fixed to the lAteral bar through the fixing bar.
Claim 2
Dependent Claim
209 words
A chair having a detachable seat comprising in combination a. a frame assembly including a pair of side frames and a pair of lateral bars rigidly connected to the respective side frames, said respective lateral bars having a plurality of engaging holes longitudinally arranged in a line and spaced apart at predetermined intervals; b. a seat having both sides doubled back to provide bag-like portions adapted to be wrapped around the respective lateral bars; and c. a pair of fixing bars inserted into the respective bag-like portions of the seat and having two groups of engaging projections projecting normal to the axis of the fixing bar and engaged in said engaging holes of the lateral bar; d. said fixing bars, prior to assembly, having one group of the engaging projections differing in a relative angle from the other group of engaging projections so that, when the engaging projections of said one group are engaged with the respective holes of said lateral bars, the engaging projections of said other group are forced into the corresponding holes of said lateral bars, in a direction that the relative angle to the projections of said one group is decreased, whereby the seat is removably fixed to the lAteral bar through the fixing bar.
Claim 3
Dependent Claim
21 words
The chair according to claim 1 in which said respective members constituting said frame assembly are made of a tubular steel.
Claim 4
Dependent Claim
46 words
The chair according to claim 1 in which said engaging holes of the lateral bar are four in number, the outer two of which correspond to the projections of said one group, and the intermediate two of which correspond to the projections of said other group.
Claim 5
Dependent Claim
30 words
The chair according to claim 3 in which said bag-like portion of the seat has two cutouts through which the two intermediate projections on the fixing bar are respectively exposed.
Claim 6
Dependent Claim
36 words
The chair according to claim 3 wherein the projections of said one group are at respective ends of the fixing bar and the projections of said other group are intermediate said ends of the fixing bar.
Claim 7
Dependent Claim
31 words
The chair according to claim 5 wherein said end projections comprise bent over ends of the fixing bar and said intermediate projections are welded to intermediate portions of the fixing bar.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |