Document Type and Number:
Japanese Patent JPS5543866
Kind Code:
B2
Abstract:
A striking apparatus has a body which carries a tool and which has a cylinder space, a piston structure within the space, and a sleeve-type distributor valve within the cylinder and around the piston. Flow of hydraulic fluid supplied to the body under pressure is controlled by the valve and piston to cause the piston to reciprocate, striking the tool. The sleeve valve has an extension portion which controls flow through a canal in the piston to a valve operating distributor space and limits flow of liquid under pressure to an outlet canal to a relatively short interval in the operating cycle, thereby reducing the amount of liquid wasted.
Application Number:
JP12543476A
Publication Date:
November 08, 1980
Filing Date:
October 19, 1976
Export Citation:
International Classes:
B25D9/12; B25D9/20; E21B1/26; F01L21/04; F01L25/06; F03C1/03