Patent ID: 6138773
Filing Date: 2000-10-31
Classification: B22D,B25D

Abstract:
An improved apparatus for decelerating a driven piston and impacting rod assembly slidably mounted within the power bore of a single stroke foundry impactor proximate the end portion of an impacting stroke wherein said improved deceleration apparatus comprises:a) a cylindrical deceleration chamber of greater diameter than said power bore having a first substantially open terminating end and a second substantially closed terminating end, said first terminating end being rigidly mounted to the head end of said power bore such that said power bore and said deceleration chamber share a common longitudinal axis; andb) a biased disk shaped deceleration piston having an engaging surface and a resistance surface, said deceleration piston being slidably mounted within said deceleration chamber for longitudinal movement therein, said deceleration piston having an axial bore formed therein for slidably receiving said impacting rod therethrough and a circular recess circumscribing said axial bore formed in said engagement surface for receiving said piston assembly.