Title:
【発明の名称】打撃装置を備える工具
Document Type and Number:
Japanese Patent JPS5916069
Kind Code:
B2
Abstract:
The invention relates to a tool which incorporates a device insuring the efficient control of a percussive hammer, regardless of the drilling depth. For this purpose, drive sludge arriving in an annular space reaches an inlet of a fluid switching element of single or double stability in which the flow of fluid alternates between two fluid circuits, causing the hammer to strike and return.
More Like This:
| WO/2013/187691 | HAMMER RAISING DEVICE |
| WO/1995/016848 | AN IN-HOLE ROCK DRILLING MACHINE |
| JPH089943 | [Title of the Invention] A reverse impact device for pulling out a rod of an impact tool |
Inventors:
MARIO KARUBONEERU
Application Number:
JP9468378A
Publication Date:
April 13, 1984
Filing Date:
August 04, 1978
Export Citation:
Assignee:
PETROLES CIE FRANCAISE
International Classes:
E21B1/26; E21B4/14; E21B6/00; E21B7/24; E21B10/00; (IPC1-7): E21B4/06
Attorney, Agent or Firm:
Yukio Maruyama
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