US 6,806,806 B2 · Polymer fuse and filter apparatus

Abstract

A fuse and filter arrangement having a polymer fuse apparatus that provides bypass fuse protection. A polymer bypass fuse includes of an electrical conductor wherein a portion of the conductor is surrounded by an internal electrode, which is then surrounded by a layer of polymeric positive temperature coefficient (PTC) material, which is then surrounded by a conductive material similar to that of the internal electrode. The fuse and filter arrangement includes a plurality of in-line and bypass fuses combined with a differential and common mode filter, which itself consists of a plurality of common ground conductive plates maintaining first and second electrode plates between the various conductive plates, all of which are surrounded by a material having predetermined electrical characteristics to provide fail safe filter and circuit protection.

Claims20

Dependent claims

A device comprising;

a first electrode defining at least the following elements, (1) upper plate, (2) a center plate, and (3) a lower plate, and wherein said upper plate is above said center plate and said center plate is above said lower plate;
a second electrode defining at least a second electrode plate, and wherein said second electrode plate is below said upper plate and above said center plate;
a third electrode defining at least a third electrode plate, and wherein said third electrode plate is below said center plate and above said lower plate;
wherein said first electrode, said second electrode, and said third electrode, are each conducively isolated from one another;
a plurality of fuses including a first fuse and a second fuse;
wherein said first fuse is conducively coupled to said second electrode, and wherein said second fuse is conducively coupled to said third electrode;
and
wherein said second electrode, said third electrode, and said center plate are positioned such that a line passing through said second electrode and said third electrode contacts said center plate.

5 more elements

Dependencies are inferred from the claim text.

Polymer fuse and filter apparatus

Life of this patent

Polymer fuse and filter apparatus

Life of this patent

Abstract

Claims20