Title:
【発明の名称】さく岩機
Document Type and Number:
Japanese Patent JPH08511841
Kind Code:
A
Abstract:
PCT No. PCT/GB94/00837 Sec. 371 Date Oct. 20, 1995 Sec. 102(e) Date Oct. 20, 1995 PCT Filed Apr. 20, 1994 PCT Pub. No. WO94/23906 PCT Pub. Date Oct. 27, 1994A rock drill with a percussion mechanism which includes a piston, a body in which is formed a chamber, at least a first cylinder which is located in the chamber and which, on an inner side, forms at least part of a sleeve for the piston, and a valve, for controlling movement of the piston, which is located on an outer side of the first cylinder. A stop structure integrally attached to the first cylinder prevents the valve from being removed.
Inventors:
Briggs, roger roberts
Lepanen, Jarmo Wallevi
Lepanen, Jarmo Wallevi
Application Number:
JP52293594A
Publication Date:
December 10, 1996
Filing Date:
April 20, 1994
Export Citation:
Assignee:
Briggs, roger roberts
Lepanen, Jarmo Wallevi
Lepanen, Jarmo Wallevi
International Classes:
B25D9/12; B25D9/14; B25D9/20; B25D9/16; B28D1/26; E21B1/00; E21B1/26; (IPC1-7): E21C3/20; B25D9/16; B28D1/26
Attorney, Agent or Firm:
Shoichi Takezawa (1 person outside)