US5609394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-way lumbar support
Assignee: Schukra USA Inc
•
Filing: 1996-02-23
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Granted: 1997-03-11
•
Expires: 2016-02-23
Abstract
Abstract An adjustable lumbar support mechanism includes a flexible support member, a device for longitudinally subtending the support member, an apex shift linkage, and a loading device engaging the apex shift linkage. The flexible support member has oppositely disposed first and second longitudinal ends. The device for longitudinally subtending the support member is disposed between the first longitudinal end and the second longitudinal end and causes the support member to arch outwardly to define an apex engaging a users back. The apex shift linkage includes a first shift link and a second shift link. The first shift link has a first end pivotably connected to the flexible support member proximate to the first longitudinal end. The second shift link is pivotably connected on a first end thereof to the flexible support at a point between the second longitudinal end and the first end of the apex shift link. The second shift link is also pivotably connected to the first shift link at a hinge point wherein the first shift link and the second shift link define an obtuse angle therebetween. The loading device engages one of the first shift link and the second shift link at a load point wherein applying a load at the load point in a direction toward the flexible support mechanism tends to shift the apex toward the second longitudinal end.
Inventors
- 👤 James T. Ligon, Sr.
- 👤 Stephen P. Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:22
CPC Classifications
B; B60; B60N; B60N2/00; B60N2/64; B60N2/66; B60N2/667; B60N2/6671; A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46; A47C7/462; A47C7/465
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
195 words
A lumbar support mechanism comprising: a flexible support member having oppositely disposed first and second longitudinal ends; means disposed between the first longitudinal end and the second longitudinal end for longitudinally subtending the support member, whereby the support member arches outwardly to define an apex engaging a user's back; and an apex shift linkage including a first shift link and a second shift link with the first shift link having a first end thereof pivotably connected to the flexible support member proximate to the first longitudinal end and the second shift link pivotably connected on a first end thereof to the flexible support at a point between the second longitudinal end and the first end of the first apex shift link and the second apex shift link also being pivotably connected to the first apex shift link at a hinge point wherein the first apex shift link and the second apex shift link define an angle therebetween; and a loading means engaging one of the first shift link and the second shift link at a load point wherein applying a load at the load point tends to shift the apex toward the second longitudinal end.
Claim 2
Dependent Claim
195 words
A lumbar support mechanism comprising: a flexible support member having oppositely disposed first and second longitudinal ends; means disposed between the first longitudinal end and the second longitudinal end for longitudinally subtending the support member, whereby the support member arches outwardly to define an apex engaging a user's back; and an apex shift linkage including a first shift link and a second shift link with the first shift link having a first end thereof pivotably connected to the flexible support member proximate to the first longitudinal end and the second shift link pivotably connected on a first end thereof to the flexible support at a point between the second longitudinal end and the first end of the first apex shift link and the second apex shift link also being pivotably connected to the first apex shift link at a hinge point wherein the first apex shift link and the second apex shift link define an angle therebetween; and a loading means engaging one of the first shift link and the second shift link at a load point wherein applying a load at the load point tends to shift the apex toward the second longitudinal end.
Claim 3
Dependent Claim
22 words
A combination as claimed in claim 1 wherein the loading means is a cable assembly engaging the linkage at the load point.
Claim 4
Dependent Claim
39 words
A combination as claimed in claim 2 wherein the cable assembly has a housing engaging the linkage at the load point and an end of a cable extends from the cable housing and is fixed to a reaction element.
Claim 5
Dependent Claim
16 words
A combination as claimed in claim 3 wherein the reaction element is the flexible support member.
Claim 6
Dependent Claim
25 words
A combination as claimed in claim 1 wherein the flexible member has a preformed bend therein disposed between the points of engagement with the linkage.
Claim 7
Dependent Claim
21 words
A combination as claimed in claim 1 wherein the load point is opposite the hinge point from the flexible support member.
Claim 8
Dependent Claim
255 words
A combination of a lumbar support mechanism and a frame for a seatback comprising: a first horizontally disposed bar fixed to the frame; second horizontally disposed bar fixed to the frame and spaced from the first horizontally disposed bar; a flexible support member having oppositely disposed first and second longitudinal ends, the first longitudinal end being rotatably attached to the first horizontally disposed bar and the second longitudinal end slidably connected to the second horizontally disposed bar; means disposed between the first longitudinal end and the second longitudinal end for longitudinally subtending the support member, whereby the support member arches outwardly to define an apex engaging a user's back; and an apex shift linkage including a first shift link and a second shift link with the first shift link having a first end thereof pivotably connected to the flexible support member proximate to the first longitudinal end and the second shift link pivotably connected on a first end thereof to the flexible support at a point between the second longitudinal end and the first end of the first apex shift link and the second apex shift link also being pivotably connected to the first apex shift link at a hinge point wherein the first apex shift link and the second apex shift link define an angle therebetween; and a loading means engaging one of the first shift link and the second shift link at a load point wherein applying a load at the load point tends to shift the apex toward the second longitudinal end.
Claim 9
Dependent Claim
255 words
A combination of a lumbar support mechanism and a frame for a seatback comprising: a first horizontally disposed bar fixed to the frame; second horizontally disposed bar fixed to the frame and spaced from the first horizontally disposed bar; a flexible support member having oppositely disposed first and second longitudinal ends, the first longitudinal end being rotatably attached to the first horizontally disposed bar and the second longitudinal end slidably connected to the second horizontally disposed bar; means disposed between the first longitudinal end and the second longitudinal end for longitudinally subtending the support member, whereby the support member arches outwardly to define an apex engaging a user's back; and an apex shift linkage including a first shift link and a second shift link with the first shift link having a first end thereof pivotably connected to the flexible support member proximate to the first longitudinal end and the second shift link pivotably connected on a first end thereof to the flexible support at a point between the second longitudinal end and the first end of the first apex shift link and the second apex shift link also being pivotably connected to the first apex shift link at a hinge point wherein the first apex shift link and the second apex shift link define an angle therebetween; and a loading means engaging one of the first shift link and the second shift link at a load point wherein applying a load at the load point tends to shift the apex toward the second longitudinal end.
Claim 10
Dependent Claim
22 words
A combination as claimed in claim 7 wherein the loading means is a cable assembly engaging the linkage at the load point.
Claim 11
Dependent Claim
36 words
A combination as claimed in claim 8 wherein the cable assembly has a housing engaging the linkage at the load point and an end of a cable extending from the cable housing engages a reaction element.
Claim 12
Dependent Claim
16 words
A combination as claimed in claim 9 wherein the reaction element is the flexible support member.
Claim 13
Dependent Claim
25 words
A combination as claimed in claim 7 wherein the flexible member has a preformed bend therein disposed between the points of engagement with the linkage.
Claim 14
Dependent Claim
21 words
A combination as claimed in claim 7 wherein the load point is opposite the hinge point from the flexible support member.
References Cited (Backward Citations)
US1182854A
Cited
US2756809A
Cited
US2843195A
Cited
US2942651A
Cited
US3378299A
Cited
US3724144A
Cited
DE2064419A1
Cited
US3762769A
Cited
US4014422A
Cited
DE2541559A1
Cited
US4153293A
Cited
US4156544A
Cited
US4354709A
Cited
US4452485A
Cited
US4182533A
Cited
US4316631A
Cited
US4449751A
Cited
US4576410A
Cited
US4494709A
Cited
US4561606A
Cited
US4601514A
Cited
US4556251A
Cited
US4632454A
Cited
US4565406A
Cited
US4564235A
Cited
US4679848A
Cited
US4880271A
Cited
US5005904A
Cited
US4915448A
Cited
US5186412A
Cited
US5050930A
Cited
US5088790A
Cited
US5076643A
Cited
US5197780A
Cited
US5217278A
Cited
US5137329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-03-10 | 2000-09-09 | 2001-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-10 | 2004-09-09 | 2005-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-10 | 2008-09-09 | 2009-03-11 | $7700.00 | Window Closed / Lapsed |