No-Seal Positioning Means for Vacuum Systems
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
In vacuum systems, internal components have to be positioned from the outside. For that purpose, it is advantageous to introduce no-seal positioning means through the wall separating the vacuum region from the atmospheric region. Fig. 1 is a schematic of such a positioning means. A pivotable flexible positioning shaft 3 is led through an inlet 2 in wall 1 separating the vacuum region V from the atmospheric region A. Shaft 3 is bent twice so that its upper portion 4 is laterally staggered to the portion in inlet 2. Upper portion 4 of shaft 3 is pivotally mounted in an element 5. In vacuum region V, shaft 3 is surrounded by a corrugated hose 6. Trailing end 7 and leading end 8 of corrugated hose 6 are permanently fixed to inlet 2 and element 5, respectively. As a result, shaft 3 is sealed from the vacuum in region V.