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https://drivepatents.com/patents/982139 · 6 Nov 2013
The spring (1) has a rolled eye (2) formed at a parabola suspension arm spring end (3) and opposite to a parabola suspension arm spring end region (4). A bent intermediate region (6) is provided between the eye and the spring end region, where the intermed...
https://drivepatents.com/patents/1015646 · 16 Feb 2011
The method for producing parabolic- or leaf springs for vehicle chassis and vehicle bodies made of workpieces (3), which are subjected to a heating process, a subsequent rolling process, further processing steps, a hardening process and a final tempering p...