KOICHI MASUBUCHI
Engineering in Arlington, MA
License number
Massachusetts 26031
Issued Date
Feb 18, 1972
Expiration Date
Jun 30, 2014
Type
Metallurgical Engineer
Address
Address
Arlington, MA 02474
Professional information
Method And Apparatus For Underwater Submerged Arc Welding
US Patent:
4069408, Jan 17, 1978
Filed:
Jun 7, 1976
Appl. No.:
5/693576
Inventors:
Koichi Masubuchi - Arlington MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
B23K 918
US Classification:
219 72
Abstract:
According to the method and apparatus of this invention, water is kept away from the arc in underwater arc welding by means of material contained in a water-tight enclosure. The water-tight enclosure is formed by pressing the seal at the bottom of the enclosure against the object to be welded and by closing the opening for the electrode on top of the enclosure by using the fluid nature of a viscous polymer. Gas generated in the enclosure during welding is expelled through check valves located along two longitudinal sides of the enclosure.
The enclosure is prepared above the water surface and then delivered to the welding site. No inert gas is needed.
Underwater Arc Stud Welding System
US Patent:
4475026, Oct 2, 1984
Filed:
Jul 26, 1982
Appl. No.:
6/401784
Inventors:
David Schloerb - Chicago IL
Koichi Masubuchi - Arlington MA
Koichi Masubuchi - Arlington MA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
B23K 920
US Classification:
219 98
Abstract:
An underwater arc stud welding system consists of a specially designed submersible stud welding gun which is connected, by means of an electrical umbilical to conventional stud welding equipment located out of the water. The stud gun employs a simple, corrosion resistant, stud lifting mechanism with only one moving part, which freely floods with water and thereby eliminates problems associated with increased ambient pressure and also employs a magnetic base and a grounded electrical safety shield.
Underwater Stud Welding Gun
US Patent:
3989920, Nov 2, 1976
Filed:
May 15, 1975
Appl. No.:
5/577582
Inventors:
Koichi Masubuchi - Arlington MA
Muneharu Kutsuna - Takarazuka, JA
Muneharu Kutsuna - Takarazuka, JA
Assignee:
Massachusetts Institute of Technology - Cambridge MA
International Classification:
B23K 920, B23K 1104
US Classification:
219 98
Abstract:
A conventional stud-welding gun has been modified to allow it to be used for welding under water. The stud is contained within a water-tight enclosure formed at the end of the gun by pressing the seal at the end against the object to which the stud is to be welded. A water pump evacuates the enclosure and a stream of inert gas is provided to expel water and dry the region where the weld is to occur.