Title:
DRILLING DEVICE FOR BRANCH PIPE JOINT
Document Type and Number:
Japanese Patent JPH0658482
Kind Code:
A
Abstract:
PURPOSE: To provide a drilling device for a branch pipe joint capable of performing a drilling job so efficiently as well as to make a drilling piece not drop from a drilling bit.
CONSTITUTION: In a branch pipe joint-use drilling device 1 where an engaging recess 11 engageable with a hexagon wrench is installed in one end and a cylindrical drill bit 12 is installed in the other end, five-roll grooves 13 are formed successively on an inner surface of this drill bit 12.
Inventors:
MASUDA SHINSUKE
Application Number:
JP21407192A
Publication Date:
March 01, 1994
Filing Date:
August 11, 1992
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
F16L41/04; (IPC1-7): F16L41/04
Next Patent: HOSE CONNECTION STRUCTURE