Gas spring for adjusting height of office chair has casing containing piston which divides it into two gas-filled chambers connected by valve which has overflow channels with different throttle effects which operate together or separately

摘要

The gas spring for use in adjusting the height of an office chair has a casing (2) containing a piston (6) which divides it into two gas-filled chambers (4a, 4b) connected by a valve (20). This has overflow channels (30, 31) with different throttle effects which operate together or separately, depending on the position of the valve stem (22).