| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piston-cylinder for heat resistance in which since a groove is formed on the outer wall surface of a cylinder with working with respect to the outside surface of the cylinder, the working operation is relatively simple compared to the conventional operation of boring a plurality of holes by means of drilling and of closing the openings, and as a result, the formation of coolant channel is facilitated and the improvement of operation efficiency of fabrication operation of the piston-cylinder apparatus is also facilitated. <P>SOLUTION: A heat-resistant piston-cylinder apparatus allows a piston provided with a piston rod to be internally fitted movably forwards and backwards into a cylinder, wherein cooling medium passage holes are disposed on the cylinder. The cooling medium passage holes are formed in such a way that the cooling medium passage grooves are formed on the outer wall surface of the cylinder and a cover cylinder body is externally fitted on the outer wall surface of the cylinder so as to cover the cooling medium passage grooves. <P>COPYRIGHT: (C)2013,JPO&INPIT |
