This is one of two patents covering SunTour's sealed parallelogram design, using a, fatally weak, wire element as one leg of the parallelogram. Unfortunately, it was the design that SunTour actually used in the SunTour Superbe Tech range.

• Publisher: Japan Patent Office
• Inventor: Nobuo Ozaki
• Country: Japan
• Date: Priority date September 1981
• Derailleur brands: SunTour
• Derailleurs: SunTour GranTech, SunTour Superbe Tech, SunTour Superbe Tech L (4800), SunTour Superbe Tech GTL (5400)