Abstract: A seal device that includes a seal portion protruding from a resilient body member in a common direction with a seal lip member. The seal portion being shorter in length and having a thickness that is thinner than the lip seal member. A gap is defined between an action diameter surface of the seal lip member and one of either a retainer portion or a ring member, wherein the seal portion contacts the other one of the retainer portion or ring member. A pressure receiving groove is defined between the seal lip member and the seal portion, and is in communication with the gap.

Abstract: The seal device is for providing seal capability of the seal faces of the seal rings from being damaged due to elastic deformation of the seal contact surfaces of the resilient body members acted on by fluid pressure. It is also for preventing wear of the seal contact surfaces of the resilient body members.