Patent ID: 7594565
Filing Date: 2009-09-29
Classification: F16D

Abstract:
1. A rod brake for stopping a moveable rod, the rod brake comprising: a pressure vessel; a bearing tube having an axial length and positioned in the pressure vessel and having a bore size for receiving the rod therethrough, said bearing tube in surface-to-surface contact with the rod along the entire axial length; a pressure medium in direct contact with the bearing tube and the pressure vessel; a cavity formed between an inner wall of the pressure vessel and the bearing tube, said cavity filled with the pressure medium; a piston configured to apply a force to the pressure medium to provide a braking force to the bearing tube and rod; and means for increasing the force transmitted from the piston to the pressure medium, wherein the means for increasing the force from the piston on the pressure medium includes at least one dowel extending from a face of the piston, wherein the at least one dowel extends into the pressure vessel and has a free end in surface-to-surface contact with the pressure medium.