Bouncing rod with adjustable pneumatic pressure

Abstract

A bouncing rod with an adjustable pneumatic pressure includes a bouncing device and a pressurizing device below the bouncing device. The air pressure of the bouncing device can be set by an adjusting valve and kept to a constant value by supplying air into the bouncing device through each bounce.

1 . A bouncing rod with an adjustable pneumatic pressure, comprising 
 a handle;    a bouncing device connected to the handle through a supportive rod, the bouncing device comprising a cylinder containing a piston, the bouncing device being connected to a slide-proof leg through an axial pipe,    the axial pipe having a link rod therein and a pressurizing piston atop the link rod;    the pressurizing piston being driven by a pressurizing device,    the link rod being connected to the slide-proof leg and having a movement stroke relative to the axial pipe;    a spring provided between the slide-proof leg and the axial pipe to provide restoring force;    an adjusting valve atop the cylinder to adjust air pressure in the cylinder.    
     
     
         2 . The bouncing rod as in  claim 1 , further comprising a knob atop the adjusting valve for adjusting a pressing force of a spring acting against a bead, the bead abutting against a passageway in the adjusting valve to adjust air drag in the passageway.  
     
     
         3 . The bouncing rod as in  claim 1 , further comprising a buffering washer at an inner face of the slide-proof leg.  
     
     
         4 . The bouncing rod as in  claim 1 , further comprising a hook portion atop the slide-proof leg and corresponding to an end opening of the axial hole.