| 摘要 |
<p>A guide member is slidably mounted on a rod, and a resilient seal bag around the rod is secured to the guide member. The rod is inserted in a heat conductive cylinder secured to the guide member, and wax is provided in the heat conductive cylinder. The seal bag has a base portion having an opening, and a bag portion, and is engaged with the rod only at the opening to form a gap between the bag portion and the rod. The gap is charged with lubricating oil. The pressure of the lubricating oil is built up to a value equivalent to the pressure of the wax, thereby holding the bag portion in a floating state. The rod is lifted by the pressure of the lubricating oil. <IMAGE></p> |
