This shows a Huret Luxe with a weird hinged pulley cage design which may be a forerunner of the Duopar design. The SunTour SMS Max GT has a hinged pulley cage that is somewhat similar.

• Publisher: US Patent and Trademark Office
• Inventor: Jacques and Roger Huret
• Country: USA
• Date: US application filed December 1970, French application filed March 1970
• Derailleur brands: Huret
• Derailleurs: Huret parallelogram designs