Rubber seal for semi-dynamic applications

摘要

This invention is directed to a seal for installation into an annular groove of dovetail configuration that has a mouth, two side walls depending from the mouth that extend away from each other and a base wall that is connected to the two side walls thereby forming the dovetail configuration. The seal of this invention viewed in cross section comprisesan element having a multi-arcual surface and a substantially flat surface,the multi-arcual surface has distinct first, second and third convex arcual surfaces;the first convex arcual surface of the seal is sized and shaped for positioning in the mouth of the annular groove of the dovetail configuration and is directly connected to the substantially flat surface; the substantially flat surface is directly connected to the second arcual convex surface that is in turn directly connected to a first concave arcual surface that is directly connected to the third convex arcual surface; the second and third convex arcual surfaces being shaped and sized so as to be in contact with the base wall of the annular groove of the dovetail configuration when the seal is seated in the groove; the third convex arcual surface and the first arcual convex surface are directly connected by a second concave arcual surface and the region defined by this second concave arcual surface forms an insertion surface of approximate complementary shape to the mouth of the annular groove for mating engagement with the side walls of the annular groove during insertion of the seal into the groove.