Patent ID: 9683698
Date: 2017-06-20
CPC Classifications: F17C,Y02E

Claim:
1. A high pressure tank, comprising: a tank main body including a liner made of a resin, and a mouthpiece made of a non-resin material and mounted to an open end of the liner; and a reinforcement layer covering the entire tank main body and having pressure resistance, wherein the liner includes a first contact surface arranged approximately perpendicular to a central axis of the liner to come into contact with the mouthpiece, the central axis of the liner is the longitudinal axis extending between a first end of the liner and a second end of the liner, the mouthpiece includes a second contact surface arranged to come into contact with the first contact surface of the liner, one of the first contact surface and the second contact surface includes projections, and the other includes recesses in which the projections being fitted, the second contact surface is formed in an approximately circular shape, the first contact surface and the second contact surface respectively include a first engagement element and a second engagement element configured to be engaged with each other and suppress separation between the mouthpiece and the liner, and the first engagement element is formed at a location that is different from a location of the projections.