Patent ID: 7770702
Filing Date: 2010-08-10
Classification: F16F

Abstract:
1. A durable oil buffer with automatic reset comprising: a cylinder with an open end and a closed end; a sleeve bearing mounted on the open end of the cylinder; a spring in the cylinder; a piston rod connected with a piston located inside in the cylinder, the piston being against the spring and the piston rod passing through the sleeve bearing; a plurality of oil orifices on the wall of the cylinder, an oil returning hole and a check valve provided on the piston; an elastic capsule enwrapping the cylinder, the elastic capsule together with an outer surface of the cylinder to define a closed elastic chamber, and oil being filled in the cylinder and the elastic chamber, the elastic capsule being bulged; when oil leaks, the bulged elastic capsule shrinks to compensate the oil leak, thereby no vacuum in the cylinder is created, and the service life of the oil buffer is increased.