Heater element as well as an insert for electrical furnaces
AssigneeSandvik Intellectual Property AB
InventorThomas Lewin
Life of this patent
Estimating the term…
Abstract
Insert for electrical furnaces comprising an insulating shell and a coiled heater element, the heater element comprising element wire that consists of at least two sections that are interconnected via a bend of element wire in such a way that the bend and the sections mutually form a loop of element wire. A fastening member is fixedly anchored in the insulating shell and arranged in the area of the bend in such a way that the element wire in a section directly connected to the bend is prevented from expanding past the fastening member.
Claims15
A coiled heater element comprising element wire of electrical resistance material, characterized in that the element wire consists of at least two sections, which are interconnected via a bend of element wire in such a way that the bend and the sections mutually form a loop of element wire, a centre axis of the element wire in at least a part of the bend forming an angle with a centre axis of the element wire in a section connected to the bend.
An insert for electrical furnaces comprising an insulating shell having an inside as well as an outside, the inside having a rotationally symmetrical shape around a centre axis, as well as a coiled heater element arranged in the insulating shell and comprising element wire of resistance material, wherein the element wire consists of at least two sections, which are interconnected via a bend of element wire in such a way that the bend and the sections mutually form a loop of element wire, a centre axis of the element wire in at least a part of the bend forming an angle with a centre axis of the element wire in a section connected to the bend, a fastening member being fixedly anchored in the insulating shell and arranged in the area of the bend in such a way that the element wire in a section directly connected to the bend is prevented from being displaced past the fastening member
Dependencies are inferred from the claim text.