Fuse with insulated plugs

Patent metadata

Field	Value
Publication number	US-2017040134-A1
Application number	US-201615331105-A
Country	US
Kind code	A1
Filing date	Oct 21, 2016
Priority date	Oct 27, 2011
Publication date	Feb 9, 2017
Grant date	—

Abstract

An improved fuse including a fuse body formed of an electrically insulative material. The fuse body defines a cavity which extends from a first end of the fuse body to a second end of the fuse body. A fusible element is disposed within the cavity and extends from a first end face of the first end of the fuse body to a second end face of the second end of the fuse body. Insulated plugs are disposed within the cavity at the first and second ends of the fuse body wherein the plugs adhere to an interior surface of the fuse body and form seals that close the internal cavity. The fuse may further include end terminations that are applied to the ends of the fuse body in electrical contact with the fusible element.

First claim

1 . A method for forming a fuse comprising:
threading a fusible element through a cavity of a fuse body with ends of the fusible element being disposed on end faces at respective ends of the fuse body; and depositing an insulative adhesive within the cavity proximate the ends of the fuse body, wherein the insulative adhesive adheres to an interior surface of the fuse body and seals the cavity.

2 . The method of claim 1 , further comprising applying conductive end terminations to the ends of the fuse body.

3 . The method of claim 2 , wherein the step of applying conductive end terminations to the ends of the fuse body comprises electrolessly plating the ends of the fuse body with a metallic material.

4 . The method of claim 1 , further comprising depositing metallized coatings on the end faces of the fuse body for facilitating electrical connections between the fusible element and the end terminations.

5 . The method of claim 1 , further comprising forming at least one kink in the fusible element.

6 . The method of claim 5 , further comprising forming at least one hole in the fusible element proximate the at least one kink.

7 . The method of claim 1 , further comprising forming the fusible element with a corrugated, wave-like shape to provide the fusible element with adjacent segments that are not coplanar.

8 . The method of claim 7 , further comprising forming at least one hole in the fusible element.

9 . The fuse of claim 1 , further comprising coining a portion of a conductor to form the fusible element.

10 . The fuse of claim 1 , further comprising fastening a fuse body cover portion to a fuse body base portion to assemble the fuse body, wherein a pair of bosses extending from the base portion are inserted through correspondingly positioned holes in the fusible element and the fuse body cover portion.

11 . The fuse of claim 10 , further comprising heat staking the bosses to secure the fuse body in an assembled configuration.

Assignees

• Littelfuse Inc

Inventors

• Arce Dennis
• Burgos Simon
• Daza Marlon
• Dumaran Restituto
• De Leon Conrado
• Marquinez Merjaycel
• Onken Dan
• Pagharion Janus
• Retardo Roel
• Salonga Bienvenido
• Zulueta Crispin

Classifications

• H01H85/38

  Means for extinguishing or suppressing arc (by powder filling H01H85/18; by mechanical tension applied to fusible member H01H85/36) · CPC title

• H01H69/02 Primary

  Manufacture of fuses · CPC title

• H01H2085/383

  with insulating stationary parts · CPC title

• H01H85/165

  Casings · CPC title

• Y10T29/49107

  Fuse making · CPC title