Patent ID: 6442796
Filing Date: 2002-09-03
Classification: F16F,Y10T

Abstract:
An air damper, comprising:a tubular cylinder with a first end and a second end; a piston having a hollow end movable in the cylinder in a longitudinal direction; a first coil spring for resiliently biasing the piston in the cylinder in the direction of the first end of the cylinder; a string having a first end affixed to the piston and a second end extending from the cylinder to be connected to an openable object so as to transfer a dampening effect produced by a motion of the piston to the openable object; a shaft having a flange, the shaft being slidably received into the hollow end of the piston in the cylinder; and a second coil spring interposed between the flange of the shaft and the piston and being inside the first coil spring, the second coil spring exerting a resilient biasing force on the piston in the direction of the first end of the tubular cylinder when the first coil spring is compressed.