Patent ID: 8471671

Claim:
An overcurent protection fuse comprising: a nonconductive fuse body having opposed first and second ends; at least one fusible element located within the fuse body; a first conductive end cap coupled to the fuse body at the first end, the first end cap comprising a first end wall and a first cylindrical side wall, the first end wall being flat and the first conductive end cap being electrically connected to the at least one fusible element; a second conductive end cap secured to the first end cap, wherein the second end cap defines a fuse rejection feature on an exterior of the second conductive end cap and an unfilled space on an interior of the second conductive end cap; wherein the second end cap includes a second end wall and a second cylindrical side wall, the first and second cylindrical side walls in surface engagement with one another and the second end wall in fluid communication with the unfilled space; wherein the fuse rejection feature is formed in and projects from the second end wall of the second end cap, the fuse rejection feature comprising a projection extending away from the first end wall, and the unfilled space extending between the first end wall and the second end wall; and a washer extending adjacent the first end wall; wherein the washer is nonconductive and wherein the washer comprises an arc extinguishing composition, the washer being in fluid communication with the unfilled space, whereby when an electrical arc burns through the first conductive end cap as the at least one fuse element operates, arc extinguishing gas generated by the an arc extinguishing composition fills the unfilled space and prevents the arc from burning through the second conductive end cap.