US 4,055,741 AGranted

Plasma arc torch

OwnerDavid Grigorievich Bykhovsky, Alexandr Yakovlevich Medvedev +3inventors

InventorsDavid Grigorievich Bykhovsky, Alexandr Yakovlevich Medvedev, Jury Alexandrovich Bogorodsky, Vladimir Nikolaevich Firsov, Yakov Vulfovich Rossomakho

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Abstract

A plasma arc torch is of a two-part design and comprises two detachable and tightly joined parts mating with each other of which one part contains an electrode holder with an electrode, a nozzle disposed coaxially of said electrode and having means for supplying an electric current thereto. An insulator is located between said electrode holder and said nozzle, wherein there are also provided passages for the supply of plasma-generating gas and coolant, these being brought out onto the mating surface of the first part. The second part of the torch accommodates means for supplying an electric current to the electrode holder and means for supplying coolant and plasma-generating gas through passages brought out onto the mating surface of the second part so that they match with the corresponding passages of the first part on the surface of the joint thereof.

Claims7

Dependent claims

A plasma arc torch of a two-part design and comprising two detachable and tightly joined first and second parts mating with each other;

the first part containing and rigidly interconnecting:
an electrode holder, an electrode mounted in said electrode holder, a nozzle with a cylindrical passage disposed coaxially of said electrode;
means for supplying an electric current to said nozzle;
an electrical insulator located between said electrode holder and said nozzle;
passages for a plasma-generating gas and coolant being brought out into the surface mating with said second part;
said second part accommodating:
means for supplying an electric current to said electrode holder;
means for supplying the coolant through passages to said electrode holder and said nozzle;
means for supplying the plasma-generating gas through said passages;
said passages of said second part being brought out into the mating surface in such a manner that they match with corresponding passages of said first part on the surface of the joint thereof, whereby said first part may be disconnected from said second part thereby simultaneously removing said electrode and said nozzle.

7 more elements

Dependencies are inferred from the claim text.