US3655239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair having identical and interchangeable seat and backrest
Assignee: Individual
•
Filing: 1969-09-05
•
Granted: 1972-04-11
•
Expires: 1989-09-05
Abstract
Abstract There is disclosed a backrest chair for use in providing seating arrangements in rooms, particularly conference rooms, cinemas, theaters, concert halls and similar rooms and which chair includes a support base adapted to be secured to the floor of such a room, such support base including a pedestal portion and two side portions, and a backrest and a folding seat of practically identical construction so secured to said side portions of said support base as to be adjustable into different positions of use relative to said support base.
Inventors
- 👤 Ettore Agosti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/12; Y; Y10; Y10S; Y10S297/00; Y10S297/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
199 words
A backrest chair for providing seating arrangements in rooms, especially school rooms, conference rooms, cinemas, theaters and concert halls, comprising a support base means intended to be secured to the floor, said support base means including two side portions, a backrest and a folding seat shiftable between a nonuse and use position each displaceably mounted at said support base means, said backrest and said folding seat possessing the same construction so as to be readily interchangeable, both said backrest and said folding seat each being equipped with pivot pin means for pivotably mounting said backrest and folding seat at said side portions of said support base means, fixing means for selectively fixing the position of said backrest so as to assume different relative positions with respect to said support base means and cooperating stop means on said backrest and folding seat and bearing against one another when said folding seat assumes its position of use, said cooperating stop means including means for adjustment of the position of said folding seat in response to adjustment of the position of said backrest causing a simultaneous adjustment of the inclination of the folding seat with adjustment of the inclination of said backrest.
Claim 2
Dependent Claim
199 words
A backrest chair for providing seating arrangements in rooms, especially school rooms, conference rooms, cinemas, theaters and concert halls, comprising a support base means intended to be secured to the floor, said support base means including two side portions, a backrest and a folding seat shiftable between a nonuse and use position each displaceably mounted at said support base means, said backrest and said folding seat possessing the same construction so as to be readily interchangeable, both said backrest and said folding seat each being equipped with pivot pin means for pivotably mounting said backrest and folding seat at said side portions of said support base means, fixing means for selectively fixing the position of said backrest so as to assume different relative positions with respect to said support base means and cooperating stop means on said backrest and folding seat and bearing against one another when said folding seat assumes its position of use, said cooperating stop means including means for adjustment of the position of said folding seat in response to adjustment of the position of said backrest causing a simultaneous adjustment of the inclination of the folding seat with adjustment of the inclination of said backrest.
Claim 3
Dependent Claim
22 words
A backrest chair as defined in claim 1, wherein said support base means is formed of plastic and possesses a one-piece construction.
Claim 4
Dependent Claim
21 words
A backrest chair as defined in claim 2, wherein said backrest and said folding seat are also each formed of plastic.
Claim 5
Dependent Claim
90 words
A backrest chair as defined in claim 1, wherein said pivot pin means of said backrest and said folding seat are received in respective recess means provided at said side portions of said support base means, said recess means for receiving said pivot pin means of said backrest being located at an upper region of said side portions and said recess means for said pivot pin means of said folding seat being located at a central region of the front side of said side portions of said support base means.
Claim 6
Dependent Claim
113 words
A backrest chair as defined in claim 4, further including protuberance means provided for said recess means receiving said pivot pin means of said folding seat at the region of the side of said last-mentioned recess means receiving said pivot pin means of said folding seat to narrow such recess means, said last-mentioned pivot pin means having flattened portions cooperating with said narrowed recess means such that said folding seat is only capable of being mounted at said support base means when said backrest is dismantled from said support base means and with said folding seat assuming an inserted position which is disposed outside of the normal folding range of said folding seat.
Claim 7
Dependent Claim
111 words
A backrest chair as defined in claim 1, wherein said stop means of said backrest and said stop means of said folding seat are each defined by cooperating stop surfaces located at respective neighboring ends thereof, said stop surfaces of said folding seat bearing against said stop surfaces of said backrest and said means for adjustment being formed by said cooperating stop surfaces extending and coacting with one another such that upon pivoting of said backrest the inclination of said folding seat in its position of use is automatically changed so that with a more inclined position of the backrest said folding seat is more pronouncedly downwardly inclined towards the rear.
Claim 8
Dependent Claim
164 words
A backrest chair as defined in claim 6, wherein said backrest comprises a first stop surface portion located along lengthwise extending regions of said backrest facing the user and at the region of said end thereof neighboring said folding seat and a second stop surface portion extending along a narrower portion of said backrest directed away from the user and likewise located at said end of said backrest neighboring said folding seat, said similarly constructed folding seat likewise being provided with a first stop surface portion located along lengthwise regions of said folding seat confronting said user and at said end thereof neighboring said backrest and a second stop surface portion located extending along a narrower portion of said folding seat directed away from the user and likewise located at said end of said folding seat neighboring the backrest, said first stop surface portion of said folding seat cooperating with said second stop surface portion of said backrest to define said cooperating stop surfaces.
Claim 9
Dependent Claim
51 words
A backrest chair as defined in claim 7, wherein the spacing of said respective second stop surface portion of each said backrest and said folding seat varies over the length of said respective narrower portion thereof from the axis of said pivot pin means of the associated backrest and folding seat.
Claim 10
Dependent Claim
29 words
A backrest chair as defined in claim 7, wherein such spacing preferably becomes smaller towards the respective side of the backrest and folding seat facing away from the user.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |