US7320503B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backrest for seats and chairs having pressure and tensile elements
Assignee: Provenda Marketing AG
•
Filing: 2005-07-06
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Granted: 2008-01-22
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Expires: 2025-07-06
Abstract
Abstract The invention relates to a backrest with a support area ( 71 ), at least one structure connected to the support area ( 71 ) or forming the support area ( 71 ), which structure ( 10 ) extends towards the top of the backrest from a first end region of the support area ( 71 ) to a second end region of the support area ( 71 ) and at the front has a tension element ( 49 ) and at the rear a pressure element ( 47 ). The tension element ( 49 ) connects the first end region ( 37 ) of the support area ( 71 ) to the second end region ( 38 ) of the support area ( 71 ) transmitting tensile forces. The pressure element ( 47 ) connects the first end region ( 37 ) of the support area ( 71 ) to the second end region ( 38 ) of the support area ( 71 ) transmitting thrust forces. Pressure element ( 47 ) and tension element ( 49 ) are in the extension direction non-displaceably connected to one another in the first and in the second end region of the support area ( 71 ). The tension element ( 49 ) and the pressure element ( 47 ) between the end regions ( 37, 38 ) are connected to one another in the extension direction displaceably against each other by means of the spacers ( 14 ) keeping the distance. The backrest has at least one bearing axis ( 43 ), with which it can be joined or is joined to a seat-back bracket at a distance from the first and from the second end region of the support area ( 71 ) between these end regions ( 37, 38 ).
Inventors
- 👤 Volker Wilhelm Eysing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:05
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/448; A47C7/46; A47C7/467; B; B60; B60N; B60N2/00; B60N2/64; B60N2/643; B60N2/66; B60N2/665; B60N2/667; B60N2/90; B60N2/914
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
304 words
A backrest with a support area extending from a first and lower end region to a second and top end region for supporting the back of a user, said backrest comprising: at least one mounting element for mounting the backrest to a backrest bracket, said at least one mounting element being arranged between the end regions at a distance from the first end region and at a distance from the second end region of the support area, and at least one extended structure with a tension element at the front side of the structure and a pressure element at its rear side, both the tension element and the pressure element extending from the first end region of the support area to the second end region of the support area, whereby the tension element connects the first end region of the support area to the second end region of the support area thereby transmitting tensile forces, and the pressure element is in the extension direction non-displaceably connected to the tension element as well in the first end region of the support area as in the second end region of the support area, the pressure element between the first end region and the second end region is arranged at a distance from the tension element and can take thrust forces, between the end regions the tension element and the pressure element are connected to one another by means of spacers, which spacers keep the distance between the pressure element and the tension element and allow a relative movement between the tension element and the pressure element in the extension direction of the structure, and the spacers together with the tension element and the pressure element in a cross section in the extension direction form a polygon structure, said structure having angles that are deformed by loading.
Claim 2
Dependent Claim
304 words
A backrest with a support area extending from a first and lower end region to a second and top end region for supporting the back of a user, said backrest comprising: at least one mounting element for mounting the backrest to a backrest bracket, said at least one mounting element being arranged between the end regions at a distance from the first end region and at a distance from the second end region of the support area, and at least one extended structure with a tension element at the front side of the structure and a pressure element at its rear side, both the tension element and the pressure element extending from the first end region of the support area to the second end region of the support area, whereby the tension element connects the first end region of the support area to the second end region of the support area thereby transmitting tensile forces, and the pressure element is in the extension direction non-displaceably connected to the tension element as well in the first end region of the support area as in the second end region of the support area, the pressure element between the first end region and the second end region is arranged at a distance from the tension element and can take thrust forces, between the end regions the tension element and the pressure element are connected to one another by means of spacers, which spacers keep the distance between the pressure element and the tension element and allow a relative movement between the tension element and the pressure element in the extension direction of the structure, and the spacers together with the tension element and the pressure element in a cross section in the extension direction form a polygon structure, said structure having angles that are deformed by loading.
Claim 3
Dependent Claim
24 words
The backrest according to claim 1 , characterized in that the spacers can be tilted relative to the tension element and the pressure element.
Claim 4
Dependent Claim
52 words
The backrest according to claim 1 , characterized in that the mounting element is connected to at least one of the tension element and the pressure element in such a manner that this connection permits displacement of the tension element relative to the pressure element in the region of the mounting element.
Claim 5
Dependent Claim
37 words
The backrest according to claim 1 , characterized in that the tension element and the pressure element are kept at a greater distance from one another in a central region than bordering on the two end regions.
Claim 6
Dependent Claim
40 words
The backrest according to claim 1 , characterized in that the tension element and the pressure element—in the region of the mounting element are connected more stiffly and between the end regions and the mounting element are connected less stiffly.
Claim 7
Dependent Claim
59 words
The backrest according to claim 1 , characterized in that the tension element and the pressure element are part of a flexible plastic profile, which plastic profile has a plurality of channels horizontally arranged in the backrest, whose cross sections when loaded deform individually with simultaneous deformation of adjacent channels, while parallel elements of the cross section remain parallel.
Claim 8
Dependent Claim
30 words
The backrest according to claim 1 , characterized in that the support area is mounted around a horizontal axis below the vertical centre and above the lower, second end region.
Claim 9
Dependent Claim
30 words
The backrest according to claim 1 , characterized in that reinforcement strips are connected to the pressure element, the tension element and the spacers aligned perpendicularly to the extension direction.
Claim 10
Dependent Claim
30 words
The backrest according to claim 8 , characterized in that the reinforcement strips are flat plastic strips, which are inserted in guides, that are present in lamellas separating the chambers.
Claim 11
Dependent Claim
25 words
The backrest according to claim 8 , characterized in that the reinforcement strips form a rear lining of the seat-back movable around the neutral axes.
Claim 12
Dependent Claim
32 words
The backrest according to claim 10 , characterized in that the lining is attached to the pressure element by means of flexible tongues which engage into corresponding grooves in the pressure element.
Claim 13
Dependent Claim
44 words
The backrest according to claim 1 , characterized in that the structure is formed in a central region only, and regions of the support area lying laterally near this central region are supported by means of reinforcement strips running parallel to the neutral axes.
Claim 14
Dependent Claim
18 words
The backrest according to claim 12 , characterized in that several reinforcement strips are fixed to the spacers.
Claim 15
Dependent Claim
19 words
The backrest according to claim 12 , characterized in that several reinforcement strips are fixed to the pressure element.
Claim 16
Dependent Claim
34 words
The backrest according to claim 12 , characterized in that several reinforcement strips at their outside ends are connected to at least one of the support area and a frame around the support area.
Claim 17
Dependent Claim
18 words
The backrest according to claim 15 , characterized in that several reinforcement strips are embedded in upholstered padding.
Claim 18
Dependent Claim
47 words
The backrest according to claim 1 , characterized in that structures which are distinguishable from one another are present in at least two places of the backrest at a distance from one another, whereby each of these structures comprises a tension element, a pressure element and spacers.
Claim 19
Dependent Claim
21 words
The backrest according to claim 17 , characterized in that the spacers of these distinguishable structures are connected to one another.
Claim 20
Dependent Claim
29 words
The backrest according to claim 17 , characterized in that the neutral axes of the one structure deviate from a parallel to the neutral axes of the second structure.
Claim 21
Dependent Claim
35 words
The backrest according to claim 19 , characterized in that the neutral axes in a cross section crosswise to the extension direction stand at an angle other than 0 and 180 degrees to one another.
Claim 22
Dependent Claim
34 words
The backrest according to claim 19 , characterized in that the neutral axes in a line parallel to the support area stand at an angle other than 0 and 180 degrees to one another.
Claim 23
Dependent Claim
25 words
The backrest according to claim 19 , characterized in that the neutral axes stand at an angle other than 90 degrees to the extension direction.
Claim 24
Dependent Claim
30 words
The backrest according to claim 1 , characterized in that the tension element and the pressure element enclose a leak-proof space and are equipped with an inlet for a medium.
Claim 25
Dependent Claim
18 words
The backrest according to claim 1 , characterized in that the spacers only offer resistance to tensile force.
Claim 26
Dependent Claim
24 words
The backrest according claim 1 , characterized in that the spacers are formed by a honeycombed profile having channels with a honeycombed cross section.
Claim 27
Dependent Claim
26 words
The backrest according to claim 1 , characterized in that the spacers are formed by elongated lamellas joined to the tension element and the pressure element.
Claim 28
Dependent Claim
17 words
The backrest according to claim 26 , characterized in that the lamellas are arranged in staggered rows.
Claim 29
Dependent Claim
22 words
The backrest according to claim 1 , characterized in that the spacers are sidewalls of a profile with a quadrangular cross section.
Claim 30
Dependent Claim
38 words
The backrest according to claim 28 , characterized in that the tension element and the pressure element are constructed from a plurality of quadrangular profiles, which are lined up side by side and flexibly connected to one another.
Claim 31
Dependent Claim
14 words
The backrest according to claim 1 , characterized in that the spacers are pin-shaped.
Claim 32
Dependent Claim
27 words
The backrest according to claim 30 , characterized in that the spacers are connected with ball and socket joints to the tension element and the pressure element.
Claim 33
Dependent Claim
22 words
The backrest according to claim 1 , characterized in that the spacers are formed by elements, which extend along a plane curve.
Claim 34
Dependent Claim
23 words
The backrest according to claim 1 , characterized in that the spacers are formed by elements, which extend along a dimensionally inclined curve.
Claim 35
Dependent Claim
73 words
The backrest according to claim 1 , wherein a transverse structure expands crosswise to the extension direction into the width of the backrest which transverse structure can be deformed around neutral axes crosswise to the expansion direction, on the front has a tension element, on the rear a pressure element, which are non-displaceably connected at two places, and between them are in the expansion direction displaceably connected to one another with spacer means.
Claim 36
Dependent Claim
27 words
The backrest according to claim 34 , characterized in that the tension elements of the expanding transverse structures and the structures extending crosswise thereto form a unit.
Claim 37
Dependent Claim
27 words
The backrest according to claim 34 , characterized in that the pressure elements of the expanding structures and of the structures extending crosswise thereto form a unit.
Claim 38
Dependent Claim
27 words
The backrest according to claim 34 , characterized in that at least one of the tension elements, and pressure elements form a frame bordering the support area.
Claim 39
Dependent Claim
40 words
The backrest according to claim 37 , characterized in that the spacers, the pressure element and the tension element are in a first direction non-displaceably connected and are in a second direction lying crosswise thereto displaceably connected to one another.
Claim 40
Dependent Claim
16 words
Any one of a chair and vehicle seat with a backrest according to claim 1 .
Claim 41
Dependent Claim
69 words
Any one of a chair and vehicle seat according to claim 39 , characterized in that the backrest exhibits a plastic profile with a plurality of chambers, which are horizontally arranged extending into the backrest, whereby the backrest with the at least one mounting element is mounted around a horizontal axis below the vertical centre of the backrest, however at a distance from the lower end of the backrest.
Claim 42
Dependent Claim
37 words
Any one of a chair and Chair or vehicle seat according to claim 40 , characterized in that the reinforcement strips are flat plastic strips, which are arranged lying horizontally in corresponding guides provided in the chambers.
Claim 43
Dependent Claim
23 words
Any one of a chair and vehicle seat according to claim 39 , characterized in that substantially horizontally arranged reinforcement strips are provided.
Claim 44
Dependent Claim
50 words
Any one of a chair and vehicle seat according to claim 39 , characterized by a rear lining of the seat-back constructed from plastic lamellas, movable in itself around a plurality of horizontally tilting axes, which is attached to the structure by means of rubber tongues engaging into corresponding slots.
Claim 45
Dependent Claim
39 words
Any one of a chair and vehicle seat according to claim 39 , characterized in that the backrest or the structure extending towards the top of the backrest is made pivotable around the bearing axis against a bias action.
Claim 46
Dependent Claim
43 words
The backrest according to claim 1 , characterized in that the spacers together with the tension element and the pressure element in a cross section in the extension direction form a quadrangular structure with which the angles deform into a parallelogram by loading.
Claim 47
Dependent Claim
33 words
The backrest according to claim 1 , characterized in that the support area is mounted around two axes inclined to one another below their vertical centre and above the lower, second end region.
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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) | 2011-01-21 | 2011-07-23 | 2012-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2015-01-21 | 2015-07-23 | 2016-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2019-01-21 | 2019-07-23 | 2020-01-22 | $7700.00 | Window Closed / Lapsed |