| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent seizure or the like by enabling smooth reciprocation of a plunger without friction. <P>SOLUTION: A plunger 4 includes a plunger body 5 having a cylindrical hole 51 with a top opened on a base end face, and a rod 6 loosely fitted and inserted to the cylindrical hole 51 of the plunger body 5 while bringing a base end face 61 into tangent contact with a cam 1. The tip end of the rod 6 reciprocating by the cam 1 is abutted on the apex surface 52 of the cylindrical hole 51, to slide the plunger body 5 back and forth along a cylinder 3. <P>COPYRIGHT: (C)2013,JPO&INPIT |
