Back to results
US 2014/0338427 A1Published application
Leak test method and leak test apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTetsuya Yamaguchi
Life of this patent
Estimating the term…
Abstract
A leak test method includes: reducing first pressure in an inspection space in a work and second pressure in a space in a master chamber; humidifying the inspection space in the work; and detecting a change in differential pressure between the inspection space in the work and the space in the master chamber, while the inspection space in the work is in a water-vapor saturated state. Also, in this leak test method, a leak in the inspection space in the work is detected from the change in the differential pressure.
Claims8
A leak test method comprising:
- reducing first pressure in an inspection space in a work and second pressure in a space in a master chamber;
- humidifying the inspection space in the work;
- and
- detecting a change in differential pressure between the inspection space in the work and the space in the master chamber, while the inspection space in the work is in a water-vapor saturated state,
- wherein a leak in the inspection space in the work is detected from the change in the differential pressure.
2 more elements
A leak test apparatus comprising:
- a master chamber;
- a pressure-reducing device that is configured to reduce first pressure in an inspection space in a work and a second pressure in a space in the master chamber;
- a humidifying device that is configured to humidify the inspection space in the work;
- and
- a detecting device that is configured to detect a change in differential pressure between the inspection space in the work and the space in the master chamber, while the inspection space in the work is in a water-vapor saturated state,
- wherein a leak in the inspection space in the work is detected from the change in the differential pressure.
3 more elements
Dependencies are inferred from the claim text.