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US 10,854,412 B2Granted
High current one-piece fuse element and split body
AssigneeLittelfuse, Inc.
InventorsEdwin C. Aberin, Redante R. Abad, Chito D. Sumalinog
Life of this patent
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Abstract
A compact, high breaking capacity fuse that includes a top and bottom insulative layer and a single piece fusible element disposed between the top and bottom insulative layer. The top and bottom insulative layers include cavities that are aligned at assembly to form a chamber in which a fusible element portion of the single piece fusible element is disposed. The single piece fusible element additionally includes terminal portions that extend along outer surfaces of the top and bottom insulative layers.
Claims16
A high breaking capacity fuse comprising:
- a first outer insulative layer, the first outer insulative layer comprising a first cavity;
- a second outer insulative layer disposed on the first outer insulative layer, the second outer insulative layer comprising a second cavity to align with the first cavity to define a chamber;
- a single piece fusible element disposed between the first outer insulative layer and the second outer insulative layer, the single piece fusible element comprising a first terminal portion, a second terminal portion, and a fusible element portion connecting the first and second terminal portions, wherein the fusible element portion is disposed at least partially within the chamber, the first terminal portion extends along at least one outer surface of the second outer insulative layer, and the second terminal portion extends along at least one outer surface of the second outer insulative layer;
- and
- a first ceramic insert formed to be disposed within and affixed into the first cavity and a second ceramic insert formed to be disposed within and affixed into the second cavity, wherein the first and second ceramic inserts fit together to define a chamber;
- wherein each of the first and second terminal portions has grooves formed in opposing sides thereof, and wherein the second outer insulative layer includes tongue portions formed in a top edge thereof, the tongue portions disposed within the grooves;
- wherein ends of the first and second terminal portions are disposed within respective cutouts formed in a bottom surface of the second outer insulative layer, wherein the bottom surface of the second outer insulative layer is disposed within a plane and wherein the cutouts are defined by surfaces that extend away from the plane at acute angles;
- and
- wherein the single piece fusible element includes bending impressions formed therein intermediate the first terminal portion and the fusible element portion and intermediate the second terminal portion and the fusible element portion.
6 more elements
A method comprising:
- providing a single piece fusible element, the single piece fusible element comprising a first terminal portion, a second terminal portion, and a fusible element portion connecting the first and second terminal portions, the single piece fusible element further including bending impressions formed therein intermediate the first terminal portion and the fusible element portion and intermediate the second terminal portion and the fusible element portion;
- providing a first outer insulative layer, the first outer insulative layer comprising a first cavity;
- providing a second outer insulative layer, the second outer insulative layer comprising a second cavity;
- placing the single piece fusible element between the first and the second outer insulative layer and aligning the first cavity with the second cavity to define a chamber;
- and
- bending the first and second terminal portions out of parallel with the fusible element portion;
- disposing ends of the first and second terminal portions within respective cutouts formed in a bottom surface of the second outer insulative layer, wherein the bottom surface of the second outer insulative layer is disposed within a plane and wherein the cutouts are defined by surfaces that extend away from the plane at acute angles;
- placing a first ceramic insert within the first cavity, the first ceramic insert formed to be disposed within and affixed into the first cavity;
- placing a second ceramic insert within the second cavity, the second ceramic insert formed to be disposed within and affixed into the second cavity, wherein the first and second ceramic inserts fit together to define a chamber;
- wherein each of the first and second terminal portions has grooves formed in opposing sides thereof, and wherein the second outer insulative layer includes tongue portions formed in a top edge thereof, the tongue portions disposed within the grooves.
7 more elements
Dependencies are inferred from the claim text.