Patent ID: 8789456

Claim:
A piston cylinder-type high-pressure generating device for use in a squid flux meter comprising: a cylinder portion formed of a non-magnetic material, wherein: the cylinder portion is divided into a cylinder main body, and two side cylinders coupled to opposite ends of the cylinder main body; the cylinder main body is configured so that a sample-enclosing capsule in which a sample and a pressure medium are enclosed can be disposed inside the cylinder main body; and pistons for load transmission are respectively disposed at opposite ends of the interior of the cylinder portion, and locking nuts are provided on the outer sides of the pistons, one side of each of said two side cylinders being coupled to said cylinder main body, another side of each of said two side cylinders having a threaded groove, one of said locking nuts being set inside said threaded groove of one of said two side cylinders and another one of said locking nuts being set inside said threaded groove of another one of said two side cylinders; a plurality of ceramic balls are disposed along an outer circumferential surface of a bearing and a wall surface of a recess of each of the locking nuts; and the pistons are moved toward the center with respect to an axial direction by screwing the locking nuts, to thereby apply a pressure to a pressure space in which the sample-enclosing capsule is set, and the sample-enclosing capsule is moved in the axial direction by rotating the locking nuts so that said locking nuts move in the same direction.