Patent US4354709A successfully refreshed from Google Patents.
US4354709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible elastic support
Assignee: Individual
•
Filing: 1979-06-22
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Granted: 1982-10-19
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Expires: 1999-06-22
Abstract
Abstract An adjustable-curvature structure, e.g. for seat backs, comprises a pair of support belts which are flexible but substantially inextensible, and a pair of tension belts juxtaposed with the support belts. A grid of transverse bars can span the support belts and a tension device is provided between the two pairs of belts so that the support belts can be bowed when the other belts are placed under tension. The curvature character is controlled by spacers which interconnect the support and tension belts to limit the distance between them at various locations along their lengths.
Inventors
- 👤 Wilhelm Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:37
CPC Classifications
A; A47; A47C; A47C23/00; A43; A43D; A43D3/00; A43D3/14; A43D3/1433; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/462; A47C7/465; E; E04; E04G; E04G11/00; E04G11/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A flexible elastic supporting structure comprising: an elongate flexible and longitudinally substantially inextensible and incompressible band forming a support belt; an elongate flexible and generally flat element forming a tension belt secured at one end thereof to a corresponding end of said band, said support and tension belts having mutually confronting broad sides and being generally parallel to and coextensive with each other; adjustment means engaging the other ends of said belts for relatively shifting same longitudinally while maintaining said tension belt under stress whereby a convex curvature away from said tension belt is imparted to said support belt; a plurality of distance-maintaining pieces engaging said belts at longitudinally separated intermediate locations for keeping said belts spaced apart transversely to said confronting sides by predetermined distances at said intermediate locations, several of said pieces being slidable along said belts; a substantially inextensible and incompressible link interconnecting said slidable pieces; and an operating member mechanically connected with said link for jointly displacing said slidable pieces longitudinally of said belts to shift said convex curvature.
Claim 2
Dependent Claim
173 words
A flexible elastic supporting structure comprising: an elongate flexible and longitudinally substantially inextensible and incompressible band forming a support belt; an elongate flexible and generally flat element forming a tension belt secured at one end thereof to a corresponding end of said band, said support and tension belts having mutually confronting broad sides and being generally parallel to and coextensive with each other; adjustment means engaging the other ends of said belts for relatively shifting same longitudinally while maintaining said tension belt under stress whereby a convex curvature away from said tension belt is imparted to said support belt; a plurality of distance-maintaining pieces engaging said belts at longitudinally separated intermediate locations for keeping said belts spaced apart transversely to said confronting sides by predetermined distances at said intermediate locations, several of said pieces being slidable along said belts; a substantially inextensible and incompressible link interconnecting said slidable pieces; and an operating member mechanically connected with said link for jointly displacing said slidable pieces longitudinally of said belts to shift said convex curvature.
Claim 3
Dependent Claim
23 words
A supporting structure as defined in claim 1 wherein said several of said pieces are generally C-shaped members with extremities overlying said belts.
Claim 4
Dependent Claim
23 words
A supporting structure as defined in claim 1 or 2 wherein said several of said pieces are provided with rollers contacting said belts.
Claim 5
Dependent Claim
61 words
A supporting structure as defined in claim 1 or 2 wherein said support and tension belts are part of a pair of parallel support belts and a pair of parallel tension belts in mutually confronting relationship and with ends engaged by said adjustment means, said distance-maintaining pieces forming two sets each engaging a respective tension belt and a respective support belt.
Claim 6
Dependent Claim
20 words
A supporting structure as defined in claim 4 wherein said support belts are interconnected by a multiplicity of transverse bars.
Claim 7
Dependent Claim
21 words
A supporting structure as defined in claim 4 wherein said link comprises a plate connected with distance-maintaining pieces of both sets.
Claim 8
Dependent Claim
26 words
A supporting structure as defined in claim 6 wherein said operating member comprises a handle pivoted to said plate and to one of said tension belts.
Claim 9
Dependent Claim
25 words
A supporting structure as defined in claim 6 wherein said plate is disposed on a side of said tension belts remote from said support belts.
Claim 10
Dependent Claim
21 words
A supporting structure as defined in claim 6 wherein said plate is inserted between said tension belts and said support belts.
Claim 11
Dependent Claim
16 words
A supporting structure as defined in claim 3 wherein said link is a stiff further belt.
References Cited (Backward Citations)
US154454A
Cited
US334556A
Cited
US614153A
Cited
US795223A
Cited
US825577A
Cited
US981966A
Cited
US1182854A
Cited
US2000624A
Cited
US2756809A
Cited
US2843195A
Cited
US3158400A
Cited
US3241879A
Cited
US3490084A
Cited
US3724144A
Cited
US4153293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |