Patent US3851920A successfully refreshed from Google Patents.
US3851920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shell chair construction
Assignee: All Steel Equipment Inc
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Filing: 1973-07-23
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Granted: 1974-12-03
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Expires: 1993-07-23
Abstract
Abstract A shell chair construction comprising a shell of molded rigid polyurethane shaped to define seat and back portions in which the seat portion has applied to same a seat assembly comprising a contoured seat pan of plate like construction, to the upper side of which is applied seat padding covered by fabric material that is brought around the rim of the pan and stapled thereto on the underside of the pan. The pan carries spaced fastener elements made fast thereto for reception in correspondingly located holes in the shell seat portion to receive fastener screws that secure the seat subassembly and the chair iron in place on the chair shell. The shell includes compression inserts embedded in the shell portion through which the said shell seat portion holes are formed, and against which the seat pan is clamped by the fastener screws that make the seat assembly and chair iron fast to the chair shell. The seat pan defines a downturned marginal rim which is clamped against the shell seat portion by the action of the fastener screws, to clamp the seat padding covering fabric in place.
Inventors
- 👤 J Lannert
- 👤 E Harris
- 👤 W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:55
CPC Classifications
A; A47; A47C; A47C5/00; A47C5/12; A47C5/125; A47C3/00; A47C3/12; A47C7/00; A47C7/02; A47C7/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
220 words
A shell chair comprising: a molded shell defining seat and back portions, said seat portion having molded in same a generally planar reinforcing seat board that is exposed on the underside of said seat portion and underlies the upper side of said seat portion, said seat portion including said seat board being formed with a plurality of fastener receiving openings extending therethrough, a seat pan seated on the upper surface of said seat portion and having cushion padding applied thereto, on the upwardly facing side thereof, a headed tubular fastener element disposed in each of said openings and carried by said pan, with the respective fastener elements having their headed ends disposed in engagement with said surface of said seat pan, said fastener elements being made fast to said seat pan, a chair base including a seat attachment member defining a plurality of screw receiving openings aligned with said seat portion openings, and a screw received in each of said screw receiving openings, said seat board and said seat pan at each of said seat portion openings having a compression resisting insert interposed therebetween through which the respective seat portion openings extend, said screws being turned to clamp tHe respective inserts between said seat pan and said seat attachment member to make said seat pan fast to said seat portion.
Claim 2
Dependent Claim
220 words
A shell chair comprising: a molded shell defining seat and back portions, said seat portion having molded in same a generally planar reinforcing seat board that is exposed on the underside of said seat portion and underlies the upper side of said seat portion, said seat portion including said seat board being formed with a plurality of fastener receiving openings extending therethrough, a seat pan seated on the upper surface of said seat portion and having cushion padding applied thereto, on the upwardly facing side thereof, a headed tubular fastener element disposed in each of said openings and carried by said pan, with the respective fastener elements having their headed ends disposed in engagement with said surface of said seat pan, said fastener elements being made fast to said seat pan, a chair base including a seat attachment member defining a plurality of screw receiving openings aligned with said seat portion openings, and a screw received in each of said screw receiving openings, said seat board and said seat pan at each of said seat portion openings having a compression resisting insert interposed therebetween through which the respective seat portion openings extend, said screws being turned to clamp tHe respective inserts between said seat pan and said seat attachment member to make said seat pan fast to said seat portion.
Claim 3
Dependent Claim
262 words
A shell chair comprising: a molded shell defining seat and back portions, said seat portion having molded in same a generally planar reinforcing seat board that is exposed on the underside of said seat portion and underlies the upper side of said seat portion, said seat portion including said seat board being formed with a plurality of fastener receiving openings extending therethrough, a seat pan seated on the upper surface of said seat portion and having cushion padding applied thereto, on the upwardly facing side thereof, a headed tubular fastener element disposed in each of said openings, with the respective fastener elements defining an internally threaded shank at one end of same and flanged head at their other ends, said fastener elements having their ends disposed in engagement with said surface of said seat pan, means for making said fastener elements fast to said seat pan with said headed ends thereof engaging said pan surface, said fastener shanks projecting into said openings, respectively, a chair base including a seat attachment member defining a plurality of screw receiving openings aligned with said seat portion openings, and a screw received in each of said screw receiving openings and into threaded relation with the fastener shank disposed therein, said seat board and said seat pan at each of said seat portion openings having a compression resisting insert interposed therebetween through which the respective seat portion openings extend, said screws being turned to clamp the respective inserts between said seat pan and said seat attachment member to make said seat pan fast to said seat portion.
Claim 4
Dependent Claim
262 words
A shell chair comprising: a molded shell defining seat and back portions, said seat portion having molded in same a generally planar reinforcing seat board that is exposed on the underside of said seat portion and underlies the upper side of said seat portion, said seat portion including said seat board being formed with a plurality of fastener receiving openings extending therethrough, a seat pan seated on the upper surface of said seat portion and having cushion padding applied thereto, on the upwardly facing side thereof, a headed tubular fastener element disposed in each of said openings, with the respective fastener elements defining an internally threaded shank at one end of same and flanged head at their other ends, said fastener elements having their ends disposed in engagement with said surface of said seat pan, means for making said fastener elements fast to said seat pan with said headed ends thereof engaging said pan surface, said fastener shanks projecting into said openings, respectively, a chair base including a seat attachment member defining a plurality of screw receiving openings aligned with said seat portion openings, and a screw received in each of said screw receiving openings and into threaded relation with the fastener shank disposed therein, said seat board and said seat pan at each of said seat portion openings having a compression resisting insert interposed therebetween through which the respective seat portion openings extend, said screws being turned to clamp the respective inserts between said seat pan and said seat attachment member to make said seat pan fast to said seat portion.
Claim 5
Dependent Claim
88 words
The shell chair set forth in claim 2, wherein: said pan defines a downwardly angled marginal flange, said cushion padding being covered by fabric material extending over said padding and under said pan thereabout, said fabric material being stapled to said pan on the underside of same about said marginal flange thereof, said screws clamping said pan marginal flange against said seat portion to clamp said fabric material therebetween, said marginal flange defining with said seat portion a recess to receive bunched edge portions of said fabric material.
Claim 6
Dependent Claim
64 words
The shell chair set forth in claim 2, wherein: said means for making said fastener elements fast to said pan comprises a push nut for each fastener shank and pressed against the underside of said pan about the respective fastener shanks, with said fastener element heads each defining a polygonal shoulder thereabout that is received in a complementary polygonal recess formed in said pan.
Claim 7
Dependent Claim
82 words
The shell chair set forth in claim 2, wherein: said seat portion has a tack strip embedded therein about the sides and back thereof, with the exposed surfaces of said shell being covered with padding and fabric material stapled to said tack strip and said seat board, and a cover panel overlying said seat board and interposed between same and said seat attachment member, said cover panel overlying the marginal edges of the fabric material that are stapled to said seat board.
Claim 8
Dependent Claim
18 words
The shell chair set forth in claim 2, wherein: said fastener shanks are free of indenting axially thereof.
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) | 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 |