Patent ID: 7562750
Filing Date: 2009-07-21
Classification: B60G,F16F

Abstract:
1. An air pressure proportional damper comprising: a container having a first chamber and a second chamber; a piston rod slidingly disposed in the first chamber of the container; a piston attached to the piston rod, the piston being in sliding engagement with walls of the first chamber; a valve disposed between the first chamber and the second chamber, the valve regulating fluid flow between the first chamber and the second chamber through a first fluid passage and a second fluid passage separate from said first fluid passage; a membrane movable between a first position where the second fluid passage is open and a second position where the second fluid passage is closed to prevent fluid flow through the second fluid passage, the membrane defining the first fluid passage as an aperture extending through the membrane to allow a specified amount of fluid flow between the first chamber and the second chamber through the first passage when the membrane is in the second position; a pressure signal supplied from an air spring to the valve; wherein the valve regulates fluid flow from the first chamber to the second chamber proportional to the pressure signal.