Measuring and testing – Probe or probe mounting
Patent
1986-03-06
1987-07-28
Rosenthal, Arnold
Measuring and testing
Probe or probe mounting
7386385, 137320, 137317, 25112914, 414217, F16K 3106
Patent
active
046825088
ABSTRACT:
A valve assembly for allowing entry of a sampling device or probe device from an ambient atmosphere to a vacuum chamber comprises an electromagnet means which controls a ball made of magnetic material. Upon entry of the device into an entry inlet of the apparatus, the ball is seated in response to activation of the electromagnet means so as to seal an aperture leading to the vacuum chamber. As the device is moved towards the vacuum chamber, the magnetic force is removed, which allows the ball to drop away from the aperture allowing entry of the device into the vacuum chamber. Upon withdrawal of the device from the vacuum chamber, the ball is actuated by the electromagnet to seal the aperture, thereby maintaining the integrity of the vacuum system.
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Hurst James
Schier J. Alan
Steiner Urs
Finnigan Corporation
Rosenthal Arnold
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