Apparatus for the treating of metal surfaces
AssigneeEl-Plasma Ltd.
InventorMoisei Esterlis
Life of this patent
Estimating the term…
Abstract
An apparatus for the surface treatment of a metal workpiece which involves-the generation between a major exposed portion of an anode and successive restricted areas of a first surface of the workpiece serving as a cathode, a vacuum arc discharge having an arc current which is not substantially less than 50 amp. and having a positive voltage-current gradient.
Claims15
Apparatus for the surface treatment of a metal workpiece comprising an enclosure;
- means for generating a vacuum in said enclosure;
- first means for controlled introduction of gas into said enclosure;
- at least one anode;
- second means for displaceably supporting said workpiece constituting a cathode in said enclosure;
- third means for applying an arc generating voltage between said anode and said cathode;
- fourth means for restricting said arc discharge to successive restricted areas of a first surface of said workpiece;
- fifth means for ensuring a substantially uniform arc distribution on said anode;
- and sixth means for effecting a relative displacement between said workpiece and said anode in a given direction.
Apparatus for the treatment of an inner surface of a cylindrical metal workpiece comprising means for establishing a vacuum in said workpiece;
- an anode displaceable within and along a length of said workpiece, electric contacts in contact with an external surface of said workpiece and displaceable with respect to said workpiece in synchronism with said anode;
- and means for passing gas through said workpiece in a direction of displacement of said anode so as to establish a gas pressure gradient in said direction.
Apparatus for the treatment of an inner surface of a cylindrical metal object comprising:
- means for establishing a vacuum in said object;
- means for displacing an anode through said object in a predetermined direction;
- means for displacing cathode contacts in contact with said object in synchronism with the displacement of said anode;
- and
- means for establishing a gas flow through said object in the direction of said displacement so as to establish a gas pressure gradient in said direction.
Dependencies are inferred from the claim text.