Buhler & Associates
Safety key that identifies improper insertion
A key with extending wings. The with at least one wing that open when the key is not properly installed and the at least one wing retract into the body of the key when the key has been properly inserted regardless of the viewing angle of the key. The key identifies improper insertion and include a spring-loaded pin and inner shaft that engages into aligned locating holes in an inversion bench. In addition to the visual appearance, a blind user can feel the sides to the key to determine if the key has been properly inserted into the inversion bench.
F A A F A A
F16B A61H A61H F16B A61H A61H
additional additional additional additional additional inventional
Jackson Bishop Cheng I
Hsieh Chou