Bent MIDI or safety fuse

• US 10,283,306 B2
• Filed: 05/22/2012
• Issued: 05/07/2019
• Est. Priority Date: 05/31/2011
• Status: Active Grant

• Current Assignee: LISA Draxlmaier GmbH
• Original Assignee: LISA Draxlmaier GmbH
• Inventors: Fussl, Peter
• Primary Examiner(s): Crum, Jacob R
• Application Number:
  US14/122,759
• Publication Number:
  US 20140097932A1
• Time in Patent Office: 2,541 Days
• Field of Search: 337191, 337254
• CPC Class Codes: H01H 2085/0555 Input terminal connected to a plurality of output terminals, e.g. multielectrode
• 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 85/044 General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified H01H85/046 - H01H85/048 take precedence
• CPC Class Codes: H01H 85/143 Electrical contacts; Fastening fusible members to such contacts
• CPC Class Codes: H01H 85/2045 Mounting means or insulating parts of the base, e.g. covers, casings
• CPC Class Codes: H01H 85/24 Means for preventing insertion of incorrect fuse

Abstract

A safety fuse includes a housing, a first contact blade having a protruding portion protruding from the housing along a first direction, a second contact blade having a protruding portion protruding from the housing, and a fusion section enclosed in the housing and connecting the first contact blade and the second contact blade. The protruding portion of the first contact blade includes two lateral edges extending in the first direction and a linear bend arranged on one of the lateral edges. The bend extends in a second direction perpendicular to the first direction.

Claims

1. A fuse arrangement for a bus bar having a plurality of bases, the fuse arrangement comprising:

the plurality of bases, each of the bases extending outward from a carrier surface, such that each respective base has first and second opposing sides that extend perpendicular from the carrier surface;

a plurality of fuses, each of the fuses configured to be arranged on a respective one of the plurality of bases and connected to the bus bar, each of the fuses including;

a housing;

a first contact blade arranged partially in the housing and coupled to a fusion section, the first contact blade including a first protruding portion protruding from the housing along a first direction, the first protruding portion including;

a first lateral edge extending in the first direction along the length of a first side of the first protruding portion;

a second lateral edge extending in the first direction along the length of a second side, opposing the first side, of the first protruding portion; and

first and second bend elements, the lengths of the first and second bend elements respectively arranged to extend continuously along the length of the first and second lateral edges, the bend elements extending in a second direction perpendicular to the first direction and extending linearly from the respective first and second lateral edge toward the carrier surface, the bend elements being engaged with the base and the bend elements enclosing the base between the bend elements such that the bend elements enclose the first and second opposing sides of the base along the length of the first and second lateral edges, wherein the bend elements are configured to absorb torque, and to protect the fusion section from absorbing torque, when mounting the first contact blade to the base; and

a second contact blade arranged partially in the housing and coupled to the fusion section, the second contact blade including a second protruding portion being substantially flat and protruding from the housing along a third direction opposite to the first direction, wherein the second substantially-flat protruding portion is connected directly to the bus bar by a non-detachable press joint and further includes;

a first lateral edge extending in the third direction along the length of a first side of the second protruding portion, the first lateral edge being free of bend elements; and

a second lateral edge extending in the third direction along the length of a second side, opposing the first side, of the second protruding portion, the second lateral edge being free of bend elements.

8. An arrangement according to claim 1, further comprising:

a plurality of screw connections each fastening the first contact blade of one of the fuses to one of the plurality of bases.

9. An arrangement according to claim 1, further comprising:

a plurality of threaded components each fixing the first protruding portion of one of the fuses to one of the plurality of bases, such that the first protruding portion is enclosed between the respective base and the threaded component.

10. An arrangement according to claim 9, wherein:

the plurality of bases are made of plastic and include a plurality of threaded inserts, and

each of the threaded components is mounted on one of the threaded inserts.

11. An arrangement according to claim 10, wherein:

the threaded inserts are screw bolts, and

the threaded components are screw nuts.

2. A fuse arrangement for a bus bar having a base, the fuse arrangement comprising:

the base extending outward from a carrier surface, such that the base has first and second opposing sides that extend perpendicular from the carrier surface; and

a fuse configured to be mounted on the base, the fuse including;

a housing;

a first contact blade arranged partially in the housing and coupled to a fusion section, the first contact blade including a first protruding portion protruding from the housing along a first direction, the first protruding portion including;

a first lateral edge extending in the first direction along the length of a first side of the first protruding portion;

a second lateral edge extending in the first direction along the length of a second side, opposing the first side, of the first protruding portion; and

first and second bend elements, the lengths of the first and second bend elements respectively arranged to extend continuously along the length of the first and second lateral edges, the bend elements extending in a second direction perpendicular to the first direction and extending linearly from the respective first and second lateral edge toward the carrier surface; and

a second contact blade arranged partially in the housing and coupled to the fusion section, the second contact blade including a second protruding portion being substantially flat and protruding from the housing along a third direction opposite to the first direction, wherein the second substantially-flat protruding portion is connected directly to the bus bar, and further includes;

a first lateral edge extending in the third direction along the length of a first side of the second protruding portion, the first lateral edge being free of bend elements; and

a second lateral edge extending in the third direction along the length of a second side, opposing the first side, of the second protruding portion, the second lateral edge being free of bend elements;

wherein the bend elements are engaged with the base, and the bend elements enclose the base between the bend elements such that the bend elements enclose the first and second opposing sides of the base along the length of the first and second lateral edges, wherein the bend elements are configured to absorb torque, and to protect the fusion section from absorbing torque, when mounting the first contact blade to the base.

3. An arrangement according to claim 2, further comprising:

a screw connection fastening the first contact blade to the base.

4. An arrangement according to claim 2, further comprising:

a threaded component for fixing the first protruding portion to the base, such that the first protruding portion is enclosed between the base and the threaded component.

5. An arrangement according to claim 4, wherein:

the base is made of plastic and includes a threaded insert; and

the threaded component is mounted on the threaded insert.

6. An arrangement according to claim 5, wherein:

the threaded insert is a screw bolt, and

the threaded component is a screw nut.

7. An arrangement according to claim 2, wherein a distance between the bend elements approximately equals a width of the base.