Hydraulic cylinder
AssigneeKoganel Corporation
InventorsAkio Nakata, Masakazu Tetsuka
Life of this patent
Estimating the term…
Abstract
A fluid pressure cylinder has a piston rod 18 fixed to a piston 26 and projecting outside a cylinder body 23. A lock surface 43 inclining to a radial direction of the piston rod 18 is formed in an engagement member 31 provided in the piston rod 18. A lock rod 35 reciprocating in an about right-angle direction to the piston rod 18 is built into a lock cylinder 33 provided in the cylinder body 23. The lock rod 35 is provided with: a large-diameter section 35a fitted into a guide hole 36 formed in the lock cylinder 33; and a slide contact section 37 provided in the large-diameter section 35a via a constriction section 35b. The slide contact section 37 contacts with a radial-inner portion of the lock surface 43 when the lock rod 35 comes nearest to the piston rod 18.
Claims6
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.
Dependencies are inferred from the claim text.