Ventilated fuse housing

Patent metadata

Field	Value
Publication number	US-10325746-B2
Application number	US-201615351872-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Nov 15, 2016
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A fuse including a first housing part and a second housing part that are joined together to define a cavity, a fuse element disposed within the cavity, a first terminal extending from a first end of the fuse element and out of the housing, and a second terminal extending from a second end of the fuse element and out of the housing, the housing having a vent channel extending from an outer surface of the housing to the cavity for allowing vapor to escape from the cavity.

First claim

What is claimed is:

1. A fuse, comprising:
a housing including a first housing part and a second housing part, the first housing part having a first cavity portion and the second housing part having a second cavity portion, wherein the first housing part and the second housing part being joined such that the first cavity portion and the second cavity portion form an internal hollow cavity in the housing;
a fuse element disposed within the cavity;
a first terminal extending from a first end of the fuse element and out of the housing;
a second terminal extending from a second end of the fuse element and out of the housing;
a first vent channel portion formed in a mating surface of the first housing part, the first vent channel portion extending from an outer surface of the first housing part to the first cavity portion; and
a second vent channel portion formed in a mating surface of the second housing part, the second vent channel portion extending from an outer surface of the second housing part to the second cavity portion;
wherein the first housing part and the second housing part are joined by sealing the first mating surface to the second mating surface such that the first vent channel portion and the second vent channel portion form a vent channel extending from an outer surface of the housing to the cavity.

2. The fuse of claim 1 , wherein the housing has two vent channels extending from opposing outer surfaces of the housing to the cavity.

3. The fuse of claim 1 , wherein the housing has four vent channels extending from adjacent outer surfaces of the housing to the cavity.

4. The fuse of claim 1 , wherein the vent channel defines a non-linear path between the outer surface of the housing and the cavity for mitigating ingress of external contaminants into the cavity.

5. The fuse of claim 1 , wherein the first housing part and the second housing part have complementary alignment portions that fit together in mating engagement to align the first housing part with the second housing part in a desired manner.

6. The fuse of claim 1 , wherein the fuse element includes at least one curved portion.

7. The fuse of claim 6 , wherein at least one of the first housing part and the second housing part has a protrusion that extends into the cavity and supports the at least one curved portion of the fuse element.

8. The fuse of claim 1 , further comprising an ultrasonic weld seam at a juncture of the first housing part and the second housing part.

9. The fuse of claim 1 , wherein the vent channel includes a wall portion disposed at the outer surface of the housing for preventing ingress of external contaminants into the cavity.

10. The fuse of claim 1 , further comprising an outer barrier attachable to the outer surface of the housing and configured to cover the vent channel for preventing ingress of external contaminants into the cavity.

Assignees

• Littelfuse Inc

Inventors

• Schlaak Michael

Classifications

• H01H85/0456

  with knife-blade end contacts · CPC title

• H01H69/02

  Manufacture of fuses · CPC title

• H01H85/165 Primary

  Casings · CPC title

• H01H85/0082 Primary

  preventing explosion of the cartridge · CPC title

• H01H85/175 Primary

  characterised by the casing shape or form · CPC title