Fuse end cap having displaceable alignment pin

Patent metadata

Field	Value
Publication number	US-11961691-B2
Application number	US-202217662385-A
Country	US
Kind code	B2
Filing date	May 6, 2022
Priority date	May 10, 2021
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A fuse assembly having a displaceable pin assembly secured within a cap bore of an end cap of the fuse assembly. The displaceable pin assembly can include a plunger that is selectively displaceable along an axis that is non-parallel to a central longitudinal axis of the first end cap. The plunger can be selectively displaceable between an extended position at which at least a first end of the plunger is outwardly positioned away from an outer surface of the first end cap, and a recessed position at which the first end of the plunger is recessed within, or generally aligned with the outer surface of, the first end cap. The displaceable pin assembly can also include a biasing element that can bias the plunger to the extended position, and a support body that can house at least a portion of the plunger and be securely coupled to the cap bore.

First claim

What is claimed is:

1. A fuse assembly comprising:
a first end cap;
a second end cap;
a casing,
wherein the casing is positioned between the first end cap and the second end cap of the fuse assembly, the first end cap and the second end cap each being an electrical contact that is electrically coupled to a fuse element,
wherein the fuse element being housed at least within an interior region of the casing; and

a displaceable pin assembly,
wherein at least a portion of the displaceable pin assembly being secured within a cap bore of the first end cap,
wherein the displaceable pin assembly comprises:
a plunger that is selectively displaceable along an axis that is non-parallel to a central longitudinal axis of the first end cap, the plunger being selectively displaceable between:
an extended position at which at least a first end of the plunger is outwardly positioned away from an outer surface of the first end cap, and
a recessed position at which the first end of the plunger is recessed within the first end cap or is generally aligned with the outer surface of the first end cap;

wherein the plunger is selectively displaceable in the extended position when the first end cap and the second end cap are in electrical contact to the fuse element.

2. The fuse assembly of claim 1 , wherein the cap bore is non-parallel to the central longitudinal axis of the first end cap,
the central longitudinal axis of the first end cap generally coinciding with a central longitudinal axis of the fuse assembly.

3. The fuse assembly of claim 1 , wherein the cap bore extends inwardly from the outer surface of the first end cap in a direction that is generally perpendicular to the central longitudinal axis of the first end cap.

4. The fuse assembly of claim 3 , wherein the cap bore extends through only one side of the first end cap.

5. The fuse assembly of claim 1 , wherein the cap bore is configured to retain at least a portion of the plunger within the cap bore at least when the plunger is at the extended position.

6. The fuse assembly of claim 1 , wherein the displaceable pin assembly further includes a support body securely positioned within the cap bore.

7. The fuse assembly of claim 6 , wherein at least a portion of the plunger is housed within an inner area of the support body.

8. The fuse assembly of claim 7 , wherein the support body is configured to retain at least a portion of the plunger within the inner area at least when the plunger is at the extended position.

9. The fuse assembly of claim 6 , wherein the support body threadlingly engages at least a portion of the cap bore.

10. The fuse assembly of claim 6 , wherein the cap bore extends between a first side and a second side of the first end cap, the plunger being positioned to pass through the first side of the first end cap as the plunger is displaced to the extended position.

11. The fuse assembly of claim 6 , wherein the displaceable pin assembly further includes a biasing element that biases the plunger toward one of the extended position and the recessed position.

12. The fuse assembly of claim 11 , wherein the plunger is biased to the extended position.

Assignees

• Abb Schweiz Ag

Inventors

• Cawood Matthew D

Classifications

• H01H31/127 Primary

  Drop-out fuses · CPC title

• H01H85/165 Primary

  Casings · CPC title

• H01H85/055

  Fusible members · CPC title

• H01H2300/044

  Application rejection 1: coded interacting surfaces, polarising, e.g. to avoid insertion of a circuit breaker or fuse or relay or rating plug of the wrong caliber or in the wrong direction · CPC title