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Bonded PTFE radial shaft seals and their manufacture

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
235 KB
Volume
2004
Category
Article
ISSN
1350-4789

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✦ Synopsis

This patent is concerned with seals for a rotating table (2) used in vacuum applications. The rotating table is mounted with a predetermined gap (Db) to the stationary component (4). O-rings (20, 21) are fitted in seal grooves (15, 16). When vacuum is applied the seals are sucked into contact with the fixed (12) and rotating (11) surfaces. When a pos-itive pressure is applied the seals are rearranged in the grooves. The groove ( 15) has an inclined portion (15b), so that the seals are prevented from being caught between the rotating table and the fixed base. Vacuum is not fed into the communication passage while the table is being rotated.

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