Seal element for sealing ducts of an air conditioner system

Claim 1

A seal element for providing a seal by being squeezed between opposed surfaces of a pair of joint members comprising: an elongate elastic body of an elastic material and having a pair of side surfaces sealingly engageable respectively with the surface of the joining members, one of said side surfaces having an outwardly bowed configuration, said elastic body having along its entire length an elongated sealing fin projecting integrally from said bowed one side surface; said sealing fin having less elasticity than said body; said body having a semi-elliptical cross-sectional shape defined by said one and other side surfaces, said other side surface including the minor axis of an ellipse containing said semi-elliptical crosssectional shape, said sealing fin extending perpendicular to said other surface; and whereby when said seal element is squeezed between the opposed surfaces of the joint members, said elastic body being elastically deformable in such a manner that said one bowed side surface is urged by said sealing fin to flex inwardly toward the other side surface and is held in sealing engagement with one of the opposed surfaces of the joint members.