Hollow fuse body with trench

Patent metadata

Field	Value
Publication number	US-10276338-B2
Application number	US-201715700566-A
Country	US
Kind code	B2
Filing date	Sep 11, 2017
Priority date	Jun 1, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

Provided herein are protection devices, such as fuses, including a set of trenches or pockets for retention of solder therein. In some embodiments, a fuse includes a body including a center portion extending between a first and second end portions. The first end portion includes a first trench formed in a first end surface, and the second end portion includes a second trench formed in a second end surface. The fuse may further include a first and second endcaps surrounding respective first and second end portions. The fuse may include a fusible element disposed within a central cavity of the body, the fusible element extending between the first end surface and the second end surface. In some embodiments, solder may be disposed within the first trench and the second trench, wherein the solder is in contact with the fusible element, the first endcap, or the second endcap.

First claim

We claim:

1. A fuse comprising:
a hollow body including a center portion extending between a first end portion and a second end portion, wherein the first end portion includes a plurality of first trenches disposed in a first end surface, wherein the second end portion includes a second plurality of trenches disposed in a second end surface, and wherein the first end surface includes a first plurality of corner sections each having a recessed ledge extending between a pair of first trenches of the plurality of first trenches;
a first endcap surrounding the first end portion and a second endcap surrounding the second end portion;
a fusible element disposed within a central cavity of the hollow body, the fusible element extending between the first end surface and the second end surface; and
solder disposed within the first trench and the second trench, the solder in contact with at least one of: the fusible element, the first endcap, and the second endcap.

2. The fuse according to claim 1 , the first plurality of trenches and the second plurality of trenches each comprising:
a set of sidewalls;
an interior wall extending between the set of sidewalls; and
a base surface extending from the interior wall.

3. The fuse according to claim 1 , wherein the solder is further disposed between the first end surface and the first endcap, and between the second end surface and the second endcap.

4. The fuse according to claim 1 , the hollow fuse body including an exterior surface, wherein the fusible element extends partially along the exterior surface.

5. The fuse according to claim 4 , wherein the exterior surface comprises a plurality of sides, and wherein the second end surface includes a second plurality of corner sections each having a recessed ledge extending between a pair of second trenches of the plurality of second trenches.

6. The fuse according to claim 4 , wherein the first trench and the second trench extend from the exterior surface towards the central cavity.

7. The fuse according to claim 1 , wherein the fusible element extends along a substantially diagonal path through a center of the central cavity.

8. The fuse according to claim 1 , wherein the fusible element wraps partially around the first end surface and the second end surface.

9. The fuse according to claim 1 , wherein the fusible element is in physical contact with an interior surface of the first endcap and an interior surface of the second endcap.

10. A protection device, comprising:
a hollow body including a center portion extending between a first end portion and a second end portion, wherein the first end portion includes a plurality of first trenches formed in a first end surface, wherein the second end portion includes a plurality of second trenches formed in a second end surface, and wherein the first end surface includes a first plurality of corner sections each having a recessed ledge extending between a pair of first trenches of the plurality of first trenches;
a first endcap surrounding the first end portion and a second endcap surrounding the second end portion;
a fusible element disposed within a central cavity of the hollow body, the fusible element extending between the first end surface and the second end surface; and
solder disposed within one or more of the first plurality of trenches and one or more of the second plurality of trenches, the solder in contact with the first endcap and the second endcap.

11. The protection device according to claim 10 , the first plurality of trenches and the second plurality of trenches each comprising:
a set of sloped sidewalls;
an interior wall extending between the set of sidewalls; and
a base surface extending from the interior wall.

12. The protection device according to claim 10 , wherein the solder is further disposed between the first end surface and the first endcap, and between the second end surface and the second endcap, and wherein the solder is in contact with the fusible element.

13. The protection device according to claim 10 , the hollow fuse body including an exterior surface, wherein the fusible element extends partially along the exterior surface.

14. The protection device according to claim 13 , wherein the first plurality of trenches and the second plurality of trenches extend inward from the exterior surface towards the central cavity.

15. The protection device according to claim 10 , wherein the fusible element partially wraps around the first end surface and the second end surface.

16. A protection device, comprising:
a fuse body including a center portion extending between a first end portion and a second end portion, wherein the first end portion includes a plurality of first trenches recessed into a first end surface, wherein the second end portion includes a plurality of second trenches recessed into a second end surface, and wherein the first end surface includes a first plurality of corner sections each having a recessed ledge extending between a pair of first trenches of the plurality of first trenches;
a first endcap surrounding the first end portion and a second endcap surrounding the second end portion;
a fusible element disposed within a central cavity of the fuse body, the fusible element extending between and wrapping around the first end surface and the second end surface; and
solder disposed within one or more of the first plurality of trenches and one or more of the second plurality of trenches, the solder in contact with the first endcap, the second endcap, and the fusible element.

17. The protection device according to claim 16 , wherein the first plurality of trenches each comprise:
a set of sidewalls extending away from the first end surface of the first end portion and towards the second end portion, the set of sidewalls sloping towards one another;
an interior wall extending between the set of sidewalls; and
a base surface extending from the interior wall, the base surface including a lip for retaining the solder.

18. The protection device according to claim 16 , wherein the solder is further disposed between the first end surface and the first endcap, and between the second end surface and the second endcap, and wherein the solder is in contact with the fusible element.

19. The protection device according to claim 16 , the hollow fuse body including an exterior surface, wherein the fusible element extends along the first end surface, the second end surface, and partially along the exterior surface.

Assignees

• Littelfuse Inc

Inventors

• Bruan Ped Peterson
• Miranda Grace
• De Leon Conrado

Classifications

• H01H85/143 Primary

  Electrical contacts; Fastening fusible members to such contacts · CPC title

• H01H85/157

  Ferrule-end contacts · CPC title

• H01H85/0458

  with ferrule type end contacts · CPC title

• H01H85/175 Primary

  characterised by the casing shape or form · CPC title