Leak detector calibrating device
AssigneeLeybold-Heraeus GmbH
InventorWerner G. Bley
Life of this patent
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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.
Claims6
In a leak detecting apparatus including 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 valve means for selectively connecting said outlet to said detector during a calibration thereof and disconnecting said outlet from said detector during a leak detecting operation thereof;
- the improvement wherein said valve means comprises a fast-switching 3/2-way valve including
- (a) a first valve port connected to the atmosphere;
- (b) a second valve port connected to said detector;
- (c) third valve port connected to said outlet of said leak simulator;
- (d) a movable valve member having first and second positions;
- in said first position said movable valve member allowing communication through the valve solely between said second and third valve ports to operatively connect the outlet of said leak simulator with said detector and in said second position allowing communication through said valve solely between said first and third valve ports to connect the outlet of said leak simulator with the atmosphere;
- and
- (e) means for moving said movable valve member into said first or second position.
In a leak detecting apparatus including 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 valve means for selectively connecting said outlet to said detector during a calibration thereof and disconnecting said outlet from said detector during a leak detecting operation thereof;
- the improvement wherein said valve means comprises a fast-switching 3/2-way valve including a movable valve member having first and second positions;
- in said first position said movable valve member allowing communication through the valve solely between the outlet of said leak simulator and an input of said detector and in said second position allowing communication through said valve solely between the outlet of said leak simulator and the atmosphere.
Dependencies are inferred from the claim text.