Preloaded spring arrangement, in particular for spring loading office chair synchronizing mechanisms
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 23, 2004
Grant Date -
Nov 21, 2002
app pub date -
May 20, 2002
filing date -
May 18, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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