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Vacuum Lock Valve

IP.com Disclosure Number: IPCOM000095482D
Original Publication Date: 1964-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Himes, W: AUTHOR

Abstract

A double shutter valve enables sealing each of two normally communicating chambers so that they can be separated without loss of vacuum in either. Such an arrangement is required, e.g., in vacuum equipment in which a large processing chamber has attached to it a product magazine chamber. This is to be removed while maintaining the product in the magazine in continuous vacuum condition.

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Vacuum Lock Valve

A double shutter valve enables sealing each of two normally communicating chambers so that they can be separated without loss of vacuum in either. Such an arrangement is required, e.g., in vacuum equipment in which a large processing chamber has attached to it a product magazine chamber. This is to be removed while maintaining the product in the magazine in continuous vacuum condition.

The valve has hollow body 10 which is carried by the entrance wall of main processing chamber 12. Crank arm 14 mounts one shutter plate 16 of the valve for sliding operation into and out of registration with entrance 18 of chamber 12. Entrance neck portion 20 of auxiliary chamber 22 is fastened by bolts 24 to the outer wall of valve body 10, in alignment with main chamber entrance 18. A second shutter plate 26is movable with 16 to cover the entrance neck 20. For this purpose, plate 26 carries boss 28 nesting in hollow boss 30 carried by plate
16.

Spring 32 urges plates 16 and 26 apart for sealing against the entrances of their respective chambers 12 and 22. This action is augmented by atmospheric pressure, when air is bled into body 10 through atmospheric inlet port 34. Then, bolts 24 can be unfastened and chamber 22 taken away, shutter plate 26 being carried with the latter by atmospheric pressure. Retainer ring structure 36 holds spring 24 on boss 30 after plate 26 has been removed.

To reassemble chamber 22 with main chamber 12 once again, the chamber 22 can be...