Inspection apparatus and inspection method
US10156208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2016 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Jun 16, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2025/0845
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An inspection apparatus includes a pressure sensor, a reference orifice, a pump, and a switching valve. The reference orifice is disposed in a first communication passage communicating a pressure passage receiving the pressure sensor, with a tank passage communicating with a fuel tank. The pump depressurizing or pressurizing the pressure passage includes an intake port and a discharge port, and one of which communicates with an atmospheric passage communicating with the atmosphere and the other one communicates with the pressure passage. The switching valve and switches between a state shutting off a communication of a second communication passage that leads to the pressure passage and passages other than the pressure passage and communicating the atmospheric passage with the tank passage and a state shutting off a communication of the atmospheric passage and passages other than the pump and the atmosphere and communicating the second communication passage with the tank passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.