US6709056B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms
Assignee: Bock 1 GmbH and Co KG
•
Filing: 2002-05-20
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Granted: 2004-03-23
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Expires: 2022-05-20
Abstract
Abstract A preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms, comprises a pair of leg springs, which are coaxially positioned on a common axis, each having a supporting leg and a positioning leg; and a preferably manually operated adjusting unit of the type of an eccentric, which the two positioning legs are coupled with and by which they are displaceable for adjustment of the preload of the spring arrangement; wherein, for stepwise locked spring load adjustment, the adjusting unit of the type of an eccentric comprises a pair of eccentric cams sitting axially side by side, the cam surfaces of which, related to the direction of rotation of the eccentric arrangement, successively comprise plane locking sections, eccentric cam control sections and holding sections that are concentric of the axis of rotation of the eccentric arrangement; and wherein the respective locking, cam control and holding sections of the two eccentric cams are offset in the direction of rotation of the eccentric arrangement.
Inventors
- 👤 Hermann Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:09
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032; A47C1/03255; A47C1/03261; A47C1/03266; A47C1/03272; A47C1/03274; A47C1/03277; A47C1/03294
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
237 words
A preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms, comprising a pair of leg springs ( 28 ), which are coaxially positioned on a common axis ( 9 ), each having a supporting leg ( 29 ) and a positioning leg ( 31 ); and an adjusting unit ( 32 ) of a type of an eccentric, which the two positioning legs ( 31 ) are coupled with and by which they are displaceable for adjustment of a preload of the spring arrangement (F); wherein, for stepwise locked spring load adjustment, the eccentric adjusting unit ( 32 ) comprises an eccentric arrangement having a pair of eccentric cams ( 40 ; 41 ) sitting axially side by side, cam surfaces ( 42 ) of which, related to a direction of rotation of the eccentric arrangement, successively comprise plane locking sections ( 43 , 47 , 50 , 53 ), eccentric cam control sections ( 44 , 48 , 51 ) and holding sections ( 45 , 49 , 52 ) that are concentric of the axis of rotation of the eccentric arrangement; and the respective locking, cam control and holding sections ( 43 , 47 , 50 , 53 ; 44 , 48 , 51 ; 45 , 49 , 52 ) of the two eccentric cams ( 40 ; 41 ) are offset in the direction of rotation of the eccentric arrangement.
Claim 2
Dependent Claim
237 words
A preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms, comprising a pair of leg springs ( 28 ), which are coaxially positioned on a common axis ( 9 ), each having a supporting leg ( 29 ) and a positioning leg ( 31 ); and an adjusting unit ( 32 ) of a type of an eccentric, which the two positioning legs ( 31 ) are coupled with and by which they are displaceable for adjustment of a preload of the spring arrangement (F); wherein, for stepwise locked spring load adjustment, the eccentric adjusting unit ( 32 ) comprises an eccentric arrangement having a pair of eccentric cams ( 40 ; 41 ) sitting axially side by side, cam surfaces ( 42 ) of which, related to a direction of rotation of the eccentric arrangement, successively comprise plane locking sections ( 43 , 47 , 50 , 53 ), eccentric cam control sections ( 44 , 48 , 51 ) and holding sections ( 45 , 49 , 52 ) that are concentric of the axis of rotation of the eccentric arrangement; and the respective locking, cam control and holding sections ( 43 , 47 , 50 , 53 ; 44 , 48 , 51 ; 45 , 49 , 52 ) of the two eccentric cams ( 40 ; 41 ) are offset in the direction of rotation of the eccentric arrangement.
Claim 3
Dependent Claim
48 words
A spring arrangement according to claim 1 , wherein the cam control sections ( 44 , 48 , 51 ) are plane prolongations of the locking sections ( 43 , 47 , 50 ) which are coplanar thereof in an ascending direction of rotation of the eccentric arrangement.
Claim 4
Dependent Claim
58 words
A spring arrangement according to claim 1 , wherein a load (K) exercised on the eccentric cam ( 40 ; 41 ) by the respective positioning leg ( 31 ) along the locking sections ( 43 , 47 , 50 , 53 ) is directed radially towards the axis of rotation ( 9 ) of the eccentric arrangement.
Claim 5
Dependent Claim
55 words
A spring arrangement according to claim 1 , wherein the offset angle (V) between respective successive sections of identical function ( 43 , 47 , 50 , 53 ; 44 , 48 , 51 ; 45 49 , 52 ) of the two eccentric cams ( 41 , 41 ) ranges from 40° to 70°.
Claim 6
Dependent Claim
24 words
A spring arrangement according to claim 1 , wherein the two eccentric cams ( 41 ) consist of a single piece ( 40 ).
Claim 7
Dependent Claim
27 words
A spring arrangement according to claim 1 , wherein the two eccentric cams ( 40 ; 41 ) are mounted on manually operated shaft ( 46 ).
Claim 8
Dependent Claim
52 words
A seat synchronizing mechanism, comprising a base carrier ( 2 ), a seat carrier ( 6 ) and backrest carrier ( 7 ), which are adjustably mounted thereon, as well as a spring arrangement (F) according to claim 1 for actuation of the synchronizing mechanism counter to the rearward pivoting motion thereof.
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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) | 2007-03-23 | 2007-09-22 | 2008-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-03-23 | 2011-09-22 | 2012-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-03-23 | 2015-09-22 | 2016-03-23 | $7700.00 | Window Closed / Lapsed |