Patent · US Expired

Welding apparatus

US4049943A · kind A · utility

39Cited by

4References

7Claims

0Family size

Assignee

K.A.L. Manufacturing Corporation · US

Inventor

Wayne Pratt · Plymouth, US

Key dates

Filing date	Oct 6, 1975
Grant date	Sep 20, 1977
Priority date	—
Expiry date	Oct 6, 1995

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K9/323
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

Welding apparatus comprising a power and gas transmission cable having coupling means including normally closed valve means for controlling passage of gas from said cable, a first welding torch including a gas passage and having first torch coupling means adapted for connection to said cable coupling means, said torch coupling means including means for opening said valve means with said first torch and cable coupling means connected, and a second welding torch having second torch coupling means adapted for connection to said cable coupling means, said second torch coupling means adapted to maintain said valve means closed with said second torch and cable coupling means connected.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.