Patent ID: 8814175

Claim:
A metal seal, provided with only two parts, one of which is a metal thin seal, of which cross-sectional configuration is U-shaped or tulip-shaped and of which each end has a contact small protruding portion for sealing, and another of which is a reinforcing outer-fit member, having edge portions, in which cross-sectional configuration is U-shaped, the reinforcing outer-fit member having a concave groove for fitting, the concave groove for fitting is directly fit to a bottom wall portion and side wall portions of the thin seal, the side wall portions of the reinforcing outer-fit member have mutually parallel flat faces, a forth end of the side wall portion of the reinforcing outer-fit member forms the edge portion, the bottom wall portion and the side wall portions of the metal thin seal are prevented from being deformed when receiving fluid pressure, a protruding piece portion of the thin seal is extended from an R-shaped chamfer of the reinforcing outer-fit member and elastically deformed as to increase and decrease a mutual interval dimension of the contact small protruding portions of the thin seal independently from a thickness dimension of the reinforcing outer-fit member, and a thickness of a side wall portion of the reinforcing outer-fit member is larger than a thickness of the side wall portion of the thin seal.