CONTROL SYSTEM FOR A TILTING CHAIR

A chair control employing an open top, generally rectangular, drawn cup (11) for housing an energy storage package (12). An axle (20) secured to and extending between stretchers (15, 16) which are secured to a tilting chair or member thereof, is journalled in the drawn cup and carries the energy storage package. Means (88) for adjusting the preload of the energy package and reducing the likelihood of an energy package failure are provided. First (21) and second (22) interlocking spindle support members are provided which form a cup reinforcing and stress distributing structure roughly box-shaped in cross section. The four outsids corners of the cup are strengthened by indented sidewall portions (60-63). A strengthening flange (56) is disposed about the periphery of the cup and the axle, journalled in the cup, has a relatively large diameter for distributing stress.