Mounting Aid for Vacuum Flanges
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
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.