Patent ID: 7299739
Filing Date: 2007-11-27
Classification: F15B

Abstract:
1. A fluid pressure cylinder comprising: a cylinder body having a cylinder chamber in which a piston is reciprocably built, and which is partitioned by the piston into a forward fluid chamber and a backward fluid chamber; a piston rod secured to the piston and projecting from an end of the cylinder body to an outside of the cylinder body; an engagement member provided on the piston rod and having a lock surface formed to incline to a radial direction of the piston rod; a lock piston reciprocably built in a lock cylinder provided in the cylinder body in an approximately right-angle direction to the piston rod; and a lock rod provided in the lock piston and having a large-diameter section, which is engaged with a guide hole formed on the lock cylinder, and a slide contact section that is provided in the large-diameter section by forming a small-diameter constriction section and contacts with a radial-inner portion of the lock surface when the lock piston comes nearest to the piston rod.