# US 5,705,737 A · Pressure leakage detector

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- Number: US 5,705,737 A
- Document ID: US5705737A
- Status: Granted
- Kind: A
- Application number: 08/805,904
- Filed: 1997-03-04
- Granted: 1998-01-06
- Earliest claimed: 1997-03-04
- Inventors: Wen-Chin Liao
- Web page: https://patentgrep.com/patent/US5705737A

## CPC

- G01M 3/025: {Details with respect to the testing of engines or engine parts}
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR

## Abstract

A pressure leakage detector includes a primary gage and a secondary gage selectively connected to each other by means of a valve. The primary gage is connected to an air compressor via a pressure regulator for regulating the pressure supplied thereto and has an outlet port adapted to directly continuously supply the pressure to a large container to detect the leakage of container by means of visual inspection. The secondary gage has an outlet port adapted to connect to a closed system on which a leakage detection is to be carried out. By opening the valve between the two gages to have the closed system reaches a predetermined internal pressured set by the regulator and then closing the valve, a leakage of the closed system may be found by a drop of the pressure reading of the secondary gage. Thereafter, a visual inspection will indicate the exact location of leakage. Thus a precise and correct detection on either a small volume closed system or a large container may be preformed in an quite easy manner.

## Claims

### Claim 1

A pressure leakage detector comprising a primary four way connector having a first, second, third and fourth ports and a second primary four way connector having a first, second, third and fourth ports, a primary pressure gage being mounted to the first port of the primary four way connector and a secondary pressure gage being mounted to the first port of the secondary four way connector, a valve being connected between the second ports of the primary and secondary four way connectors; a pressure regulator being connected to the third port of the primary four way connector and having an inlet port adapted to connect to a pressurized air source, a manually operated pressure relief valve being mounted to the third port of the secondary four way connector, a valve for directly providing the pressurized air to an object to be detected being provided on the fourth port of the primary four way connector, a valve for providing the pressurized air from the secondary four way connector to an object to be detected being provided on the fourth port of the secondary four way connector.

### Claim 2 (depends on 1)

The pressure leakage detector as claimed in claim 1, wherein the pressurized air source comprises an air compressor.