| 摘要 |
<p>PURPOSE:To improve radiating efficiency, by a method wherein plural annular grooves are provided in the outer peripheral surface of the shoe of a plunger, a shoe is formed by an iron series material, and a slide plate is secured to a surface positioned facing the oblique plate of the shoe. CONSTITUTION:A spherical end part 12a is formed to the tip of each plunger 12, and a shoe 16, brought into slide contact with the surface of an oblique plate, is joined with the spherical end part so that it can be oscillated. The shoe 16 is formed by an iron series material, plural annular grooves 26 are formed in the outer peripheral surface of the shoe, and a slide plate 27 is secured to a surface positioned facing the oblique plate. This enables improvement of radiating efficiency in addition to improvement of drape to the oblique plate, resistance to baking, and resistance to wear.</p> |
