Patent US4264378A successfully refreshed from Google Patents.
Patent US4747640A successfully refreshed from Google Patents.
US4747640A
Expired / Lapsed
US
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Chair support
Assignee: Giroflex Entwicklungs AG
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Filing: 1987-09-14
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Granted: 1988-05-31
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Expires: 2007-09-14
Abstract
Abstract The chair support comprises a supporting structure, a seat holder and a backrest holder. The seat holder is pivotably or swivelably connected by means of a first swivel joint with the supporting structure and by means of a second swivel joint with the backrest holder. The backrest holder possesses an arm or arm structure and a substantially flat-surfaced hollow tube which is fitted and fastened in a holding support of the arm. The arm or arm structure projecting into about the middle of the chair support between the first and the second swivel joint is connected with a third swivel joint by means of guide rods or links which are supported at the supporting structure by means of a fourth swivel joint. A first spring element engages at the third swivel joint and a second spring element engages at the supporting structure. Both spring elements are releasable and blockable by means of operating or actuating rods. In spite of the space-saving and simple construction of the chair support, the usual seating comfort of such chairs is offered.
Inventors
- 👤 Hermann Locher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:10
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032; A47C1/03261; A47C1/03283; A47C1/03272; A47C1/03277
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
219 words
A chair support, comprising: a seat holder having a front end and a backrest end; a backrest holder; a first swivel joint possessing a substantial horizontal axis of rotation; a supporting structure inclinably connected with the front end of said seat holder by means of said first swivel joint; a second swivel joint possessing a substantially horizontal axis of rotation inclinably connecting the backrest end of said seat holder with said backrest holder; said backrest holder possessing.arm means having a free end; said arm means extending from said second swivel joint towards the supporting structure; a third swivel joint possessing a substantially horizontal axis of rotation for pivotably connecting said arm means at said supporting structure; a first spring element supported at said supporting structure acting at said backrest holder; a foot support; a second spring element for supporting said supporting structure at said foot support; said first spring element being positioned between the free end of said arm means of said backrest holder and the front end of said support structure; said seat holder comprising two partial seat holders arranged adjacent and in spaced relationship from one another; said supporting structure being disposed between said partial seat holders; and said second swivel joint being constructed as a torsion spring and connecting said seat holder to said backrest holder.
Claim 2
Dependent Claim
219 words
A chair support, comprising: a seat holder having a front end and a backrest end; a backrest holder; a first swivel joint possessing a substantial horizontal axis of rotation; a supporting structure inclinably connected with the front end of said seat holder by means of said first swivel joint; a second swivel joint possessing a substantially horizontal axis of rotation inclinably connecting the backrest end of said seat holder with said backrest holder; said backrest holder possessing.arm means having a free end; said arm means extending from said second swivel joint towards the supporting structure; a third swivel joint possessing a substantially horizontal axis of rotation for pivotably connecting said arm means at said supporting structure; a first spring element supported at said supporting structure acting at said backrest holder; a foot support; a second spring element for supporting said supporting structure at said foot support; said first spring element being positioned between the free end of said arm means of said backrest holder and the front end of said support structure; said seat holder comprising two partial seat holders arranged adjacent and in spaced relationship from one another; said supporting structure being disposed between said partial seat holders; and said second swivel joint being constructed as a torsion spring and connecting said seat holder to said backrest holder.
Claim 3
Dependent Claim
59 words
The chair support as defined in claim 1, wherein: said first swivel joint interconnects said two partial seat holders of said seat holder with one another at the front end of said seat holder; and said second swivel joint interconnecting said two partial seat holders with one another at the region of said backrest end of said seat holder.
Claim 4
Dependent Claim
29 words
The chair support as defined in claim 1, wherein: the arm means of said backrest holder comprises two partial arms located adjacent and in spaced relationship from one another.
Claim 5
Dependent Claim
27 words
The chair support as defined in claim 3, further including: a single hollow tube; and said backrest holder comprising said arm means and said single hollow tube.
Claim 6
Dependent Claim
41 words
The chair support as defined in claim 4, wherein: said single hollow tube defines a substantially flat-surfaced hollow tube; and said two partial arms defining a holding support located underneath said second swivel joint for receiving said substantially flat-surfaced hollow tube.
Claim 7
Dependent Claim
49 words
The chair support as defined in claim 5, wherein: said single hollow tube having an end extending towards the seat holder; and the end of said single hollow tube extending towards the seat holder fitting into and being fixedly connected with said holding support of said two partial arms.
Claim 8
Dependent Claim
30 words
The chair support as defined in claim 6, wherein: said end of said single hollow tube being fixedly connected by welding with said holding support of said two partial arms.
Claim 9
Dependent Claim
70 words
The chair support as defined in claim 4, wherein: said single hollow tube has an end extending towards the seat holder; and said end of said single hollow tube extending towards said seat holder possesses an inclination of about 15° to 45° with respect to the seat holder; and said hollow tube having a backrest end which possesses an inclination of 80° to 100° with respect to the seat holder.
Claim 10
Dependent Claim
33 words
The chair support as defined in claim 8, wherein: said end of said hollow tube extending towards said seat holder possesses an inclination of 18° to 30° with respect to the seat holder.
Claim 11
Dependent Claim
60 words
The chair support as defined in claim 1, wherein: said first and second spring elements are each constructed as compression spring means; a respective slide tappet provided for each said compression spring means of said first and second spring elements; and a respective operating rod provided for each said slide tappet for blocking and releasing the related compression spring means.
References Cited (Backward Citations)
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US4629249A
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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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |