Reinforced gasket for segmented housing

In ventilating apparatus arranged in aligned housings, a reinforced gasket for sealing juxtaposed ends of first and second ones of the housings, said gasket comprising:

• a rigid closed perimeter frame having two oppositely directed faces and a radially inwardly directed edge that defines an open area;
• and
• toroidal elastomeric sealing rings extending around the opened area on and extending axially outward from said two faces and interlocked with the perimeter frame, each of said sealing rings having a hollow section, so as to be compressible toward the rigid perimeter frame means to permit the gasket to be inserted between the first and second ones of the housings and to be withdrawn therefrom without moving the first and second ones of the housings, whereby said gasket can be inserted between the two juxtaposed ends, with said ends spaced a distance less than the combined thickness of said frame and sealing rings causing said sealing rings to be compressed to seal against said ends and hold said gasket in place.