Inlet valve for probe apparatus

Measuring and testing – Probe or probe mounting

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Details

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.

REFERENCES:
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patent: 3498313 (1970-03-01), Belich
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patent: 4489863 (1984-12-01), Horchos et al.
patent: 4534314 (1985-08-01), Ackley
patent: 4542712 (1985-09-01), Sato et al.
patent: 4558587 (1985-12-01), Fruzzetti

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