US Pat. No. 9,462,671

ELECTRODE STRUCTURE FOR PLASMA CUTTING TORCHES

KJELLBERG-STIFTUNG, Fins...

1. An electrode structure for plasma cutting torches, wherein a recess open at one side in the direction of a workpiece to
be processed is formed in an electrode holder or in a holding element connected with the electrode holder for receiving an
emission insert, in which recess the inserted emission insert can be fastened in one or more of a force transmitting manner,
a shape-matching manner or with material continuity, characterized in that,
a temporarily active pressure equalization passage is present between a hollow space formed in said recess and the emission
insert and the environment through the emission insert and/or between an outer jacket surface region of the emission insert
and the inner wall of the recess which is formed in the holding element or in the electrode holder; and/or

a temporarily active pressure equalization passage is present between a hollow space formed in a recess and the holding element
and the environment through the holding element and/or between an outer jacket surface region of the holding element and the
inner wall of the recess which is formed in the electrode holder or in the holding element wherein

a groove or flattened portion is conducted, starting from the hollow space, up to and into a region close to the end face
of the holding element and/or emission insert facing the workpiece such that in the region of the end face a radially peripheral
full-area contact occurs between the inner wall of the electrode holder and the outer jacket surface of the holding element
and/or the inner wall of the holding element and the outer jacket surface of the emission insert at least at a normal room
temperature.

US Pat. No. 9,073,141

ELECTRODE FOR PLASMA CUTTING TORCHES AND USE OF SAME

Kjellberg-Stiftung, (DE)...

1. An electrode, for plasma cutting torches, comprising:
an electrode holder; and
an emission insert, connected to the electrode holder in at least one of a force-fitted and/or shape-matched manner; and
wherein the emission insert includes at least one section, along its longitudinal axis, that is arranged between two other
sections or next to a section, and that has a reduced outer diameter in a rotationally symmetrical emission insert or a reduced
cross-sectional surface in a non-rotationally symmetrical emission insert with respect to the other one or more sections,
and

wherein the emission insert is formed with a section with reduced outer diameter or reduced cross-sectional surface projecting
out of the electrode holder.

US Pat. No. 9,743,505

PLASMA TORCH

KJELLBERG-STIFTUNG, Fins...

1. A plasma torch comprising
a housing (30) and a plasma torch head connected thereto, said plasma torch head including a nozzle (21) and nozzle opening (210),

at least one feed extending into the housing for guiding plasma gas into and through said housing (30) to said nozzle opening (210),

a hollow enclosed space (11) positioned within said housing (30) and connected to said at least one feed to receive the plasma gas, said hollow enclosed space including an exit opening
to lead plasma gas out of the hollow enclosed space,

a valve (33) which opens and closes said exit opening, said valve arranged at said exit opening, and

a gas exit (37) connected with said valve to guide plasma gas out of the hollow enclosed space and outside the housing (30) in an open state of said valve (33).

US Pat. No. 10,485,086

SINGLE OR MULTI-PART INSULATING COMPONENT FOR A PLASMA TORCH, PARTICULARLY A PLASMA CUTTING TORCH, AND ASSEMBLIES AND PLASMA TORCHES HAVING THE SAME

Kjellberg-Stiftung, Fins...

1. A plasma torch including:an electrode
a nozzle; and
a plasma gas conveying part arranged between the electrode and the nozzle, the plasma gas conveying part comprising:
a first part and a second part; and
an inner face adjacent a cavity located in the plasma gas conveying part;
wherein at least a portion of the first part and at least a portion of the second part are arranged concentrically to one another;
wherein the plasma gas conveying part additionally includes a third part;
wherein the first part is arranged between the second part and the third part;
wherein the third part has the same thermal and electrical properties as the second part;
wherein at least a portion of the first part and at least a portion of the third part are arranged concentrically to one another; and
wherein at least a portion of the second part and at least a portion of the third part are arranged concentrically to one another.

US Pat. No. 10,201,068

METHOD FOR THE PLASMA CUTTING OF WORKPIECES

KJELLBERG-STIFTUNG, Gies...

1. A method for plasma cutting a workpiece using a plasma cutting torch having at least a torch body, an electrode and a nozzle, the workpiece having an upper surface facing the plasma cutting torch and a lower surface with a thickness defined between the upper surface and the lower surface, and the workpiece having a free edge that extends from the upper surface to the lower surface,the plasma cutting torch emitting a plasma jet that provides a cut through the workpiece and is movable in a feed movement direction from a position of incidence of the plasma jet onto the upper surface of the workpiece to the free edge of the workpiece, said plasma jet exiting from the lower surface of the workpiece at an emission position, wherein as the plasma cutting torch is moved toward the workpiece free edge, the emission position lags from the position of incidence on the upper surface to the emission position on the lower surface, such that when the plasma jet is incident perpendicular to the upper surface of the workpiece, the lag from the position of incidence to the emission position defines a first distance, wherein the method comprises:
inclining or deflecting the plasma jet in the feed movement direction at an angle ? with respect to an axis aligned perpendicular to the upper surface of the workpiece, said angle ? being between at least 5° and a maximum of 45° from said axis aligned perpendicular to the upper surface of the workpiece as observed in the feed movement direction, such that the emission position of the plasma jet from the lower surface of the workpiece is spaced in the feed movement direction from the position of incidence, the spacing defining a second distance which is at most half the first distance, said inclining or deflecting of the plasma jet occurring no later than when the position of incidence of the plasma jet on the upper surface of the workpiece has reached a spacing from the free edge of the workpiece on the upper surface that corresponds to 25% of a dimension of the workpiece thickness.