# US 10,502,611 B2 · Calibration apparatus

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- Number: US 10,502,611 B2
- Document ID: US10502611B2
- Status: Granted
- Kind: B2
- Application number: 15/273,313
- Filed: 2016-09-22
- Published: 2017-03-30
- Granted: 2019-12-10
- Earliest claimed: 2015-09-28
- Assignees: Tatsuno Corporation
- Applicants: Tatsuno Corporation
- Inventors: Tsutomu Otaki; Norikazu Osawa
- Web page: https://patentgrep.com/patent/US10502611B2

## CPC

- G01F 25/14: {using a weighing apparatus}
- G01F 25/15: {specially adapted for gas meters (G01F25/11 - G01F25/14, G01F25/17 take precedence)}
- G01G 17/04: for weighing fluids, e.g. gases, pastes
- Y02E 60/32: Hydrogen storage
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01G: WEIGHING (sorting by weighing B07C5/16)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

To provide a calibration device for apparatus filling a gas such as hydrogen gas and capable of precisely measuring quantity of the gas such as hydrogen gas that are filled at high pressure. A calibration device 100 according to the present invention includes a measurement housing 10 accommodating a filling vessel 2 to which a high pressure fuel gas is fed from outside; a scale 3 for measuring a weight of a fuel gas fed to the filling vessel 2; and a main body housing 10 accommodating the measurement housing 1 and the scale 3.

## Claims

### Claim 1

A calibration device comprising:
a measurement housing accommodating a filling vessel to which a high pressure fuel gas is fed from outside;
a dew-point instrument coupled to the measurement housing for measuring a dew-point temperature in the measurement housing;
a dry gas pipe detachably mounted to the measurement housing, the dry gas pipe being sized and structured to carry dry gas to the measurement housing;
a scale positioned outside of the measurement housing and operative for measuring a weight of a fuel gas fed to the filling vessel;
a main body housing accommodating the measurement housing and the scale;
a fluid receiving port mounted on the measurement housing and engageable with a nozzle of a source of high pressure fuel gas from which the high pressure gas is fed; and
a filling gas supply line extending between the fluid receiving port and the filling vessel.

### Claim 2 (depends on 1)

The calibration device as claimed in claim 1, wherein equipment is accommodated in the measurement housing through a member with heat insulating property.

### Claim 3 (depends on 1)

The calibration device as claimed in claim 1, wherein at an upper portion of the measurement housing is formed a weight mounting portion for mounting a weight for performing a span adjustment of the scale when place or environment where the measurement is carried out is changed.

### Claim 4 (depends on 2)

The calibration device as claimed in claim 2, wherein at an upper portion of the measurement housing is formed a weight mounting portion for mounting a weight for performing a span adjustment of the scale when place or environment where the measurement is carried out is changed.

### Claim 5 (depends on 1)

The calibration device as claimed in claim 1, further comprising a check valve coupled to the filling gas supply line for preventing backflow of the high pressure fuel gas within the filling gas supply line.

### Claim 6 (depends on 1)

The calibration device as claimed in claim 1, further comprising a filling gas outlet on the measurement housing and fluidly connected to the filling vessel.

### Claim 7 (depends on 6)

The calibration device as claimed in claim 6, further comprising a filling gas release pipe extending between the filling vessel and the filling gas outlet.

### Claim 8 (depends on 1)

The calibration device as claimed in claim 1, further comprising a gas outlet on the measurement housing for venting dry gas from the measurement housing.

### Claim 9 (depends on 1)

The calibration device as claimed in claim 1, further comprising a locking mechanism coupled to the scale and the main body housing for releasably securing the scale to the main body housing.

### Claim 10 (depends on 1)

The calibration device as claimed in claim 1, further comprising a plurality of wheels coupled to the main body housing to facilitate movement of the main body housing and the scale accommodated by the main body housing.

### Claim 11 (depends on 1)

The calibration device as claimed in claim 1, wherein the dew-point instrument is configured to generating a signal including a measured dew-point temperature to facilitate control over flow of the high pressure fuel gas into the filling vessel based on the measured dew-point temperature.