Patent ID: 7798052

Claim:
A fluid pressure cylinder including a cylinder body having a cylinder chamber therein closed by a pair of cover members, a piston disposed inside said cylinder body and which is displaceable along an axial direction in said cylinder chamber, and ports through which a pressure fluid is supplied and discharged disposed respectively in said cover members, said fluid pressure cylinder comprising: a piston hole defined in said piston that penetrates in an axial direction through said piston, said piston hole having an annular fitting groove disposed on an end surface side of said piston, said fitting groove being expanded in diameter with respect to said piston hole, said fitting groove being defined between an outer circumferential surface of a piston rod that is inserted through said piston hole and an inner circumferential surface of said piston hole; a hollow cylindrical ring body installed on an end of said piston along the axial direction thereof, and which is displaceable together with said piston; and an accommodating hole formed in at least one of said cover members, for receiving and accommodating said ring body therein upon displacement of said piston, wherein said ring body is formed by press working from a metal material, and wherein one end of said ring body comprises a fitting projecting in an axial direction toward a side of said piston for fitting said ring body into said piston, said fitting being fitted into said fitting groove.