Universal dual stud modular fuse holder assembly for bussed and non-bussed power connections

• US 8,269,596 B2
• Filed: 12/23/2009
• Issued: 09/18/2012
• Est. Priority Date: 12/23/2009
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Cooper Technologies Company (Eaton Corporation PLC.)
• Inventors: Staylor, John Lawrence
• Primary Examiner(s): Vortman, Anatoly
• Application Number:
  US12/646,253
• Publication Number:
  US 20110148564A1
• Time in Patent Office: 1,000 Days
• Field of Search: 337/191, 337/235, 337/256, 337/161, 337/186, 337/187, 337/227, 337/229
• US Class Current: 337/229
• CPC Class Codes: H01H 2085/025 Structural association with a binding post of a storage battery
• CPC Class Codes: H01H 2085/2055 Connections to bus bars in an installation with screw in type fuses or knife blade fuses
• CPC Class Codes: H01H 2085/209 Modular assembly of fuses or holders, e.g. side by side; combination of a plurality of identical fuse units
• CPC Class Codes: H01H 85/203 for fuses with blade type terminals
• CPC Class Codes: H01H 85/2045 Mounting means or insulating parts of the base, e.g. covers, casings
• CPC Class Codes: H01H 85/205 Electric connections to contacts on the base

Abstract

Modular fuse holders include dual studs with stepped configuration allowing the fuse holders to be universally used with and without bus bars while ensuring proper connection of a fuse.

Claims

1. A modular fuse holder assembly comprising:

at least one insulative body; and

first and second terminal studs projecting from the at least one insulative body in a spaced apart and generally parallel relationship to one another;

wherein each of the first and second terminal studs comprises a threaded terminal portion having a first outer diameter, and a bus bar receiving portion having a second outer diameter larger than the first diameter, the bus bar receiving portion defining a generally planar fuse terminal receiving surface proximate one end of the terminal portion

wherein each of the first and second terminal studs further includes an anchor portion attached to the insulative body, the anchor portion having a third outer diameter larger than the second outer diameter; and

wherein the anchor portion defines a generally planar bus bar receiving surface spaced from and generally parallel to the fuse terminal receiving surface.

2. The modular fuse holder assembly of claim 1, further comprising a bus bar, the bus bar having a thickness, and the bus bar receiving surface and the fuse terminal receiving surface being spaced by an amount substantially equal to the thickness of the bus bar.

3. The modular fuse holder assembly of claim 1, wherein the third outer diameter is not constant along an axis of the anchor portion.

4. The modular fuse holder assembly of claim 1, wherein the at least one insulative body is further configured to receive a fuse between the first and second terminal studs, the fuse including a nonconductive housing and first and second conductive terminal elements extending from the nonconductive housing, each of the first and second conductive terminal elements including an aperture having an outer diameter substantially equal to the first outer diameter, and wherein the aperture in the first and second conductive element is fitted over the respective first and second terminal stud and the terminal elements being seated upon the fuse terminal receiving surface when the fuse is installed.

5. The modular fuse holder assembly of claim 4, wherein the first and second conductive terminals elements are each generally planar.

6. The modular fuse holder assembly of claim 5 wherein the first and second conductive terminal elements are generally coplanar.

7. The modular fuse holder assembly of claim 1, further comprising a bus bar having a plurality of spaced apart holes extending therethrough, each of the holes being substantially equally sized and having an outer diameter substantially equal to the second outer diameter.

8. The modular fuse holder assembly of claim 7, wherein the bus bar has a thickness, and the bus bar receiving portion in each of the first and second terminal studs extends for an axial distance approximately equal to the thickness of the bus bar.

9. The modular fuse holder assembly of claim 7, wherein the bus bar is a generally planar element.

10. The modular fuse holder assembly of claim 7, further comprising another insulative body having a power input stud attached thereto and ganged with the at least one insulative body, the power input stud having an outer diameter approximately equal to the second diameter.

11. The modular fuse holder assembly of claim 10, wherein the at least one insulative body comprise a plurality of insulative bodies ganged together, each of the plurality of insulative bodies including first and second terminal studs, and the first terminal studs in each respective one of the plurality of bodies being received in one of the holes in the bus bar.

12. The modular assembly of claim 11, wherein the insulative body having the power input stud is configured to be ganged with the plurality of insulative bodies in a plurality of different positions relative to the plurality of insulative bodies including first and second terminal studs, and wherein the bus bar is configured to receive the power input terminal in multiple ones of the spaced apart holes in the bus bar to accommodate the plurality of different positions.

13. The modular bus bar assembly of claim 11, wherein the second terminal stud in each respective one of the plurality of insulative bodies is not associated with a bus bar.

14. The modular assembly of claim 1, wherein the fuse terminal receiving surfaces of the first and second terminal studs are generally coplanar to one another.

15. A modular fuse holder assembly comprising:

a plurality of substantially identical insulative bodies configured to be ganged to one another in a side-by-side arrangement to form a fuse block, one of the substantially identical insulative bodies including a power input stud attached thereto and the other of the substantially identical insulative bodies each having a pair of terminal studs attached thereto, the power input stud in the one substantially identical insulative body having a first outer diameter and each of the pair of terminal studs in the other of the substantially identical insulative bodies having threaded portions with a second outer diameter smaller than the first outer diameter;

each of the pair of terminal studs in the other of the substantially identical insulative bodies further including a bus bar receiving portion having an outer diameter approximately equal to the first outer diameter of the power input stud, the bus bar receiving portions each defining a fuse terminal receiving surface spaced from the respective substantially identical insulative bodies;

whereby, when a fuse is connected between each pair of terminal studs in the other of the substantially identical insulative bodies with opposed terminal elements of the fuse maintained in contact with the fuse terminal receiving surface in spaced relation to the other of the substantially identical insulative bodies, an electrical connection is established from the power input stud to and through the fuse.

16. The fuse holder assembly of claim 15, further comprising a bus bar having a plurality of spaced apart holes, the spaced apart holes having an outer diameter approximately equal to the first diameter of the power input stud, and wherein the power input stud is received in one of the spaced apart holes and one of the terminal studs in each of the pairs of the terminal studs is received in the other ones of the spaced apart holes in the bus bar.

17. The fuse holder assembly of claim 16, wherein the bus bar has a thickness, and the bus bar receiving portions of each of the pairs of the terminal studs extend for an axial distance that is approximately equal to the thickness of the bus bar.

18. The fuse holder assembly of claim 16, wherein the bus bar is substantially planar.