Air pressure shock absorber

Claim 1

An air pressure shock absorber comprising: a cylinder defining a first opening at one end of said cylinder; a first chamber defined by said cylinder having a forward chamber portion and a rear chamber portion; a first piston slidably mounted in said first chamber; a first piston rod mounted on said first piston, said first piston rod extending fron the cylinder through said first opening; spring means located in the cylinder for moving the piston by a pressing force; a second chamber of smaller diameter than said first chamber defined by said cylinder located contiguous with the forward portion of said first chamber; a second piston rod mounted at one end to the first piston opposite to said first piston rod; a second piston slidably mounted in said second chamber of the cylinder, the other end of said second piston rod mounted on said second piston and said second piston being of said smaller diameter; and a bypass passage defined by an aperture in a wall of said cylinder communicating between said second chamber and the atmosphere, and said bypass passage rapidly releases compressed air in a forward portion of said first chamber of the cylinder to the atmosphere when the second piston moves a predetermined distance to position itself past the aperture to open said bypass passage to said first chamber due to a force pushing on an end of the outwardly extended first piston rod.