Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Seal 12 is compressible between cover 14 and open-ended fixture 16 so as to ensure that air leakage does not occur between cover 14 and fixture 16. Seal 12 is endless and fits on the endless rim portion 16a of fixture 16. Seal 12 in its uncompressed free condition is shown in cross section in Fig. 1. It has upper rounded seal edge portions 12a and 12b and a downwardly extending center mounting lip 12c which is triangular in cross section in uncompressed condition. Cover 14 has a downwardly depending flange portion 14a, and spaced openings 18 are provided in the flange portion 14a.