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Mounting Aid for Vacuum Flanges

IP.com Disclosure Number: IPCOM000034586D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Ott, HP: AUTHOR

Abstract

Flanges used with vacuum chambers are usually very heavy, in particular when carrying additional equipment for insertion into the chamber. However, they are hard to grip, and the centering is difficult. This may lead to the danger of accidents and to malfunction. To facilitate the handling of these flanges, re-usable mounting bolts are provided such that a pair is placed, and releasably fixed, in diametrically opposite holes in the flange. Each mounting bolt consists of a cylindrical shaft 1 and a (plastic) handle 2. Shaft 1 has a first centering section 3 for insertion into a hole 4 in the collar 5 of the vacuum chamber. A second, recessed section 6 of shaft 1 carries a sleeve 7 and a pair of O-rings 8, 9 at both ends of sleeve 7, as well as a distance ring 10, a spring washer 11 and a washer 12.

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Mounting Aid for Vacuum Flanges

Flanges used with vacuum chambers are usually very heavy, in particular when carrying additional equipment for insertion into the chamber. However, they are hard to grip, and the centering is difficult. This may lead to the danger of accidents and to malfunction. To facilitate the handling of these flanges, re- usable mounting bolts are provided such that a pair is placed, and releasably fixed, in diametrically opposite holes in the flange. Each mounting bolt consists of a cylindrical shaft 1 and a (plastic) handle 2. Shaft 1 has a first centering section 3 for insertion into a hole 4 in the collar 5 of the vacuum chamber. A second, recessed section 6 of shaft 1 carries a sleeve 7 and a pair of O-rings 8, 9 at both ends of sleeve 7, as well as a distance ring 10, a spring washer 11 and a washer
12. A third section 14 of shaft 1 is threaded to receive the thread of a mounting nut 15 to which handle 2 is fixed. For mounting flange 16 on collar 5 of the vacuum chamber, two mounting bolts are inserted into holes 17 of flange 16, and handles 2 are screwed to cause O-rings 8 and 9 to be squeezed and thus fix shafts 1 within holes 17. A copper gasket ring 18 is placed in a recess 19 in flange 16 and retained in its position by a pair of pivotable clamps 20 appropriately bent around the shoulder of flange 16 so as to just grip gasket ring
18. After securing flange 16 to collar 5, handles 2 may be unscrewed, clamps 20 pivoted away from gask...