Patent ID: 6089142
Filing Date: 2000-07-18
Classification: F16F

Abstract:
A piston for a hydraulic dashpot for motor vehicles, comprising: a piston rod, piston being mounted on one end of said piston rod; a cylinder divided into a two compartments by said piston, two groups of lines arranged paralleling said piston rod and conveying hydraulic fluid in opposite directions; disk-shaped check valves, substantially in form of stacks of cup springs, at each end blocking one group of lines in one direction at a time; one of said valves blocking inner ones of said lines comprising two separated springs one above the other or a stack of springs, a plurality of said springs at one end being nearer an outlet from said inner lines maintaining one cross-section open for fluid to flow through, when pressure of said fluid increases a plurality of said springs at the other end opening another cross-section for said fluid to flow through and one of said valves blocking outer ones of said lines and opening intakes into said inner lines; a resilient cap covering outlets of said outer lines accommodated by the valve blocking said outer lines; a resilient component at an end facing away from said outer lines, said resilient cap resting against said resilient component by way of seperated spring.