| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a piston which secures a width of contact which is brought into contact with a part to be extruded, and improves quality by making a U-shaped cross section part a separate type. <P>SOLUTION: The piston is provided with a piston body 12, a reinforcing ring 13, and an outer periphery seal lip 14a. The piston body has a clutch extruding part 12d which is provided so that it is brought into contact with a multiple disc clutch 4 on its surface. Then the reinforcing ring is engaged with the periphery of an outer periphery skirt part 12c of the piston body 12, and the outer periphery seal lip 14a, which is provided at a reinforcing ring 13, is brought into hermetic contact with an outer diameter surface of a piston-insertion hole 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
