Patent ID: 9746006
Date: 2017-08-29
CPC Classifications: F15B

Claim:
1. A fluid pressure cylinder comprising: a cylinder main body having therein a cylinder chamber into which a pressure fluid may be introduced, the cylinder chamber having one open end in an axial direction of the cylinder main body and another open end opposite the one open end in the axial direction; a piston connected to a piston rod, the piston being displaceable in an interior of the cylinder chamber along the axial direction; a cap for blocking the one open end of the cylinder chamber, the cap comprising a planar main body portion, which an end surface of the displaceable piston can abut against or separate from, the planar main body portion being located at a first position in the axial direction of the cylinder main body, the cap further comprising an annular outer edge portion provided on an outer circumference of the main body portion, the annular outer edge portion being bent to extend in an oblique direction having a component in the axial direction extending toward the one open end of the cylinder chamber, away from the another open end of the cylinder chamber and away from the planar main body portion, the annular outer edge portion having a distal end that bites into an inner circumferential wall of the cylinder chamber, to be locked with the inner circumferential wall of the cylinder chamber, a position in the axial direction where a surface of the annular outer edge portion facing the another open end of the cylinder chamber bites into the inner circumferential wall of the cylinder chamber defining a second position wherein the second position is farther from the another open end, in the axial direction, than is the first position, and wherein a space which is delimited by the surface of the annular outer edge portion facing the another open end of the cylinder chamber, the inner circumferential wall of the cylinder chamber and the end surface of the piston is formed when the end surface of the piston comes into abutment against the main body portion; a rod end that blocks the another open end of the cylinder chamber; and a first pressure fluid inlet/outlet port that communicates with the cylinder chamber in the cylinder main body, wherein the first pressure fluid inlet/outlet port opens to the cylinder chamber at a location in the axial direction between the first position and the second position, such that the first pressure fluid inlet/outlet port communicates with said space, wherein the space is formed in an annular shape with a triangular shape in cross section, wherein the space is provided between the first position and the second position, and wherein the second position is at a position in the axial direction that corresponds to a position in the axial direction of a corner of said triangular shape that is the farthest of the corners from said another open end.