Browse Prior Art Database

Acoustic Seal

IP.com Disclosure Number: IPCOM000051530D
Original Publication Date: 1981-Feb-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Wilcox, GR: AUTHOR

Abstract

This article describes a toroidal seal having a U-shaped cross section for insertion over the cut end of spiral bendable metal tubing which is to be connected to straight walled tubing.

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Acoustic Seal

This article describes a toroidal seal having a U-shaped cross section for insertion over the cut end of spiral bendable metal tubing which is to be connected to straight walled tubing.

Fig. 1 shows how spiral fabricated flexible tubing appears prior to welding. A strip of metal having corrugations A, B, C, D, E, and F and weld flanges 11 is formed into a spiral tube, as shown in Fig. 1 and the flanges 11 are welded to each other. After welding, the corrugations A, B, C, D, E, and F remain uniform, but the area between corrugation F and A has a slightly different profile because it contains the area of the weld.

The seal article of manufacture is shown in cross section in Figs. 2 and 3. The seal includes projections A prime, B prime, C prime, D prime, E prime, and F prime which engage corrugations A through F and provide a seal. Because the area between A and F contains the weld, the outside diameter of the tube is not as large at that point and the high point of the corrugation cannot make contact with the inside surface 13 of the seal. Accordingly, instead of placing the projection F prime at an angle of 300 degrees, it is placed at 0 degrees behind projection A prime, permitting the area between projection A prime and F prime to be molded to seal the weld area.

The seal will usually be made out of a material such as neoprene or rubber which permits the outer leg of the U to be inverted so that the projections A prime and F prime are easily visibl...