# US 12,112,870 B2 · Shunt resistor

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- Number: US 12,112,870 B2
- Document ID: US12112870B2
- Status: Granted
- Kind: B2
- Application number: 18/459,217
- Filed: 2023-08-31
- Published: 2023-12-21
- Granted: 2024-10-08
- Earliest claimed: 2019-04-17
- Assignees: Suncall Corporation
- Applicants: Suncall Corporation
- Inventors: Naoya Ashida; Kenji Murakami
- Web page: https://patentgrep.com/patent/US12112870B2

## CPC

- G01R 1/203: {Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts (resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R)}
- H01C 13/00: Resistors not provided for elsewhere
- H01C 1/144: the terminals or tapping points being welded or soldered
- H01C 3/12: lying in one plane
- H01C 7/06: including means to minimise changes in resistance with changes in temperature
- H01C 1/14: Terminals or tapping points specially adapted for resistors; Arrangements of terminals or tapping points on resistors
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H01C: RESISTORS

## Abstract

A shunt resistor the resistive value of which can be lowered simply and easily has: a first resistive body, two base materials that sandwich the first resistive body therebetween and are joined by a welding to the first resistive body, and a second resistive body joined by a welding to the two base materials at different positions from the first resistive body. In addition, the second resistive body can come into contact with the first resistive body.

## Claims

### Claim 1

A shunt resistor comprising:
a first resistive body;
two base materials sandwiching the first resistive body therebetween and joined to the first resistive body by welding;
the first resistive body being orthogonal to a longitudinal direction of the two base materials such that a height direction of the first resistive body is orthogonal to the longitudinal direction of the two base materials;
a second resistive body joined to the two base materials by welding at a position different from the first resistive body; and
the second resistive body being placed on an upper surface or a lower surface of the first resistive body so as to be orthogonal to the first resistive body, and being placed at a central position in the height direction of the first resistive body, and parts of the second resistive body in contact with the two base materials being joined to the two base materials by welding.

### Claim 2 (depends on 1)

The shunt resistor according to claim 1, wherein:
the second resistive body is provided with a first notch having a U shape in plan view on one side surface thereof, and is provided with a second notch having a U shape in plan view on an opposite side surface thereof; and
measurement terminals erected and fixed on each of the two base materials respectively are positioned in the first notch and the second notch.

### Claim 3

A shunt resistor comprising:
a first resistive body;
two base materials sandwiching the first resistive body therebetween and joined to the first resistive body by welding;
a second resistive body joined to the two base materials by welding at a position different from the first resistive body;
the second resistive body being placed on an upper surface or a lower surface of the first resistive body so as to be orthogonal to the first resistive body, and parts of the second resistive body in contact with the two base materials being joined to the two base materials by welding;
the second resistive body is provided with a first notch having a U shape in plan view on one side surface thereof, and is provided with a second notch having a U shape in plan view on an opposite side surface thereof; and
measurement terminals erected and fixed on each of the two base materials respectively are positioned in the first notch and the second notch.