Browse Prior Art Database

No-Seal Positioning Means for Vacuum Systems

IP.com Disclosure Number: IPCOM000040531D
Original Publication Date: 1987-Nov-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Bordt, H: AUTHOR [+3]

Abstract

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.

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No-Seal Positioning Means for Vacuum Systems

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. Inlet 2 in wall 1 must be statically sealed. Leading end 8 on the upper portion of element 5 is provided with an arm 9 and a shield 10. Shield 10 is pivoted on arm 9 as shaft 3 is pivoted about axis 12. Fig. 2 shows how two superimposed movements, such as the positioning movement of shaft 3 and the pivotal movement of corrugated hose 6, displace shield 10. The pivotal axis of shaft 3 is designated as 12. Point 11/0 defines the starting position of point 11 on leading end 8 of the arrangement shown in Fig. 1. Shield 10 may be circularly shaped, its center being designated as 13/0 corresponding to point 13 of the suspension of shield 10 on arm 9 (Fig. 1). Pivoting shaft 3 without corrugated hose 6 in the direction of arrow 14, for example, would lead to point 13 on circ...