Leak detector calibrating device
US4794784A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Apr 23, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/207
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A leak detecting apparatus includes a detector arranged for sensing a gas emanating through a specimen to be tested for leaks; a leak simulator having an outlet emitting a gas of a known flow rate; and a valve for selectively connecting the outlet to the detector during a calibration thereof and disconnecting the outlet from the detector during a leak detecting operation thereof. The valve comprises a fast-switching 3/2-way valve including a movable valve member having first and second positions. In the first position the movable valve member allows communication through the valve solely between the outlet of the leak simulator and an input of the detector and in the second position allows communication through the valve solely between the outlet of the leak simulator and the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.