A vertical rack-type spline-forming machine based on a novel slide base arrangement comprising a pair of vertical slide bases structurally joined by a symmetrically arranged set of tie bars. The structurally-joined vertical slide bases can be rested in an upright position on a non-structural space frame...http://www.google.ca/patents/US6047581?utm_source=gb-gplus-sharePatent US6047581 - Drive system for vertical rack spline-forming machine
