Patent ID: 8025135

Claim:
A hydraulic damping device for drawer comprising: a cylinder having a front opening in a front end thereof and a rear opening in a rear end thereof; a front cap sealed to the front opening of said cylinder; a rear cap sealed to the rear opening of said cylinder, said rear cap having a center axle hole; a hydraulic fluid filled in said cylinder; a piston rod having a rod body inserted through the center axle hole of said rear cap and extending out of said cylinder, a pin axially extending from one end of said rod body and suspending inside said cylinder, and a retainer connected to said pin remote from said rod body; a rigid valve block coupled to said pin and stopped against said rod body of said piston rod, said rigid valve block having a diameter smaller than the inner diameter of said cylinder and a plurality of through holes axially extending through front and rear sides thereof; and a piston connected to said pin and being axially movable along said pin between said retainer and said rigid valve block, said piston having an outer diameter smaller than the inner diameter of said cylinder, a plurality of through holes and slots axially extending through front and rear sides thereof, at least one spring strip extending into at least one of said slots, said at least one spring strip having a raised portion extending out of said piston toward said rigid valve block.