Boot with casing for e.g. skiing, snowboarding or sledging includes pressurized bladder in sock which is automatically controlled in response to varying foot volume for optimum fit

摘要

A supportive sock (4) with an inflatable bladder (5) is carried in the inner shoe. Pressure of cushioning which fills the intermediate space is varied automatically, as the foot volume alters. A compression spring (8) in the casing (11) exerts a controlled force. Adjustments are made by the lever (7) used in conjunction with the filling cylinder (6) : An independent claim is included for the method of adjustment.