Patent ID: 6612582
Filing Date: 2003-09-02
Classification: F16J

Abstract:
A dust lip structure of an oil seal for oscillation provided with a dust lip in which a first dust lip portion in a front end portion and a second dust lip portion in a base end portion are in slidable contact with a rodsaid first dust lip portion being in contact with said rod at a first contact position with a first interference, said second dust lip portion being in contact with said rod at a second contact position with a second interference, said oil seal has a metal core between said dust lip and an oil seal lip, a thickness of the front end portion of the dust lip is substantially {fraction (3/2)} of the first interference of the first dust lip portion with respect to the rod, and an outer diameter of a front end side of the dust lip is set to be parallel to each of an inner diameter of said front end portion and an inner diameter of the base end portion.