Single bolt fuse assembly with an electrically isolated bolt

Patent metadata

Field	Value
Publication number	US-11842876-B2
Application number	US-202217894239-A
Country	US
Kind code	B2
Filing date	Aug 24, 2022
Priority date	Feb 11, 2021
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A single bolt fuse assembly and method to connect a single bolt fuse to a circuit or device are disclosed. The single bolt fuse assembly enables the single bolt fuse to be used on any electrical device having a hole suitable for receiving a threaded shaft and connectable to a circuit or device that electrically connects to a female battery or power cable. The apparatus includes a separate high-conductive metal terminal that mates with the stud that mechanically attaches the fuse between the electrical devices. The stud is insulated to avoid becoming part of the electrical circuit and to ensure proper operation of the fuse. By mechanically attaching the stud to the metal terminal, the stud is unlikely to get separated from the fuse.

First claim

The invention claimed is:

1. A fuse assembly, comprising:
an insulated steel bolt comprising a base coupled to a shaft; and
a metal terminal comprising a bolt base receptacle comprising a hollow interior with a side opening and an inset portion with a side opening, wherein the base is laterally presented into the side opening of the bolt base receptacle to fit the base into the hollow interior, and wherein the shaft of the insulated steel bolt is laterally presented into the side opening of the inset portion to fit the shaft of the insulated steel bolt into the inset portion;
wherein the base is a rectangular cube of a first dimension.

2. The fuse assembly of claim 1 , wherein the shaft of the insulated steel bolt is to be fed through a cylindrical opening of a fuse.

3. The fuse assembly of claim 1 , the metal terminal further comprising a shaft disposed on one side of the bolt base receptacle.

4. The fuse assembly of claim 1 , wherein the hollow interior is a second rectangular cube of a second dimension.

5. The fuse assembly of claim 4 , wherein the second dimension is greater than the first dimension.

6. The fuse assembly of claim 3 , wherein the side opening of the hollow interior of the bolt base receptacle is on a surface of the bolt base receptacle adjacent the shaft of the metal terminal.

7. The fuse assembly of claim 1 , the insulated steel bolt further comprising an insulated washer, wherein the insulated washer is disposed at a bottom portion of the shaft of the insulated steel bolt and is on top of the base.

8. The fuse assembly of claim 1 , wherein the base is insulated with an electrically insulating overmolding material.

9. The fuse assembly of claim 3 , wherein the bolt base receptacle and the shaft of the metal terminal are machined from a unitary, electrically conductive material.

10. The fuse assembly of claim 1 , further comprising a nut and a washer, wherein the washer is secured on the shaft of the insulated steel bolt.

11. The fuse assembly of claim 10 , wherein the shaft of the insulated steel bolt is of sufficient length to fit through a ring terminal of a female cable before the nut is secured on the shaft of the insulated steel bolt.

12. A fuse assembly, comprising:
an insulated steel bolt comprising a base coupled to a shaft; and
a metal terminal comprising a bolt base receptacle comprising a hollow interior with a side opening, wherein the base is laterally presented into the side opening of the bolt base receptacle to fit the base into the hollow interior, and wherein the shaft of the insulated steel bolt is laterally presented into the side opening of the inset portion to fit the shaft of the insulated steel bolt into the inset portion;
wherein the base is insulated with an electrically insulating overmolding material.

13. The fuse assembly of claim 12 , wherein the base is laterally presented into the side opening of the bolt base receptacle to fit the base into the hollow interior.

Assignees

• Littelfuse Inc

Inventors

• Bianchin Tiziano
• Tinto Massimiliano
• Jozwiak Andrew J
• Schwartz Geoffrey

Classifications

• H01H85/2045 Primary

  Mounting means or insulating parts of the base, e.g. covers, casings · CPC title

• H01H85/205

  Electric connections to contacts on the base · CPC title

• H01H85/2005

  for use with screw-in type fuse · CPC title

• H01H85/22

  Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse · CPC title

• H01R13/68

  with built-in fuse · CPC title