Title:
【考案の名称】空打防止機構を備えた油圧打撃装置
Document Type and Number:
Japanese Patent JPS59124077
Kind Code:
U
Inventors:
E Hiroyuki Hara
Application Number:
JP1677783U
Publication Date:
August 21, 1984
Filing Date:
February 09, 1983
Export Citation:
International Classes:
B25D9/26; B25D17/10; E21B1/00; E21B44/00; (IPC1-7): B25D9/26; B25D17/10; E21C3/32
Domestic Patent References:
| JPS5464002A | 1979-05-23 | |||
| JPS5517791B2 | 1980-05-14 |