METHOD OF MANUFACTURING THIN-TYPE JACK, AND THIN-TYPE JACK

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing a thin-type jack, and the thin-type jack capable of taking a large stroke depending on an expanding/contracting direction without causing a lowering of pressure. SOLUTION: Metal sheets are put over the upper and lower end parts of an expansion cylinder formed in bellows shape, and an oil feeding pipe is mounted for feeding pressure oil therein. The peripheries of the upper and lower end parts are welded in an oil-tight state. After putting metal frame plates to weld parts, these joining parts are welded. COPYRIGHT: (C)2005,JPO&NCIPI