| 摘要 |
<p>A seal (30) for use in fluid couplings, such as those utilized in compressed air braking systems for tractor trailers and the like, has a lower portion, an intermediate portion, and an upper portion. The outer diameter of the intermediate portion is less than the outer diameters of the lower and upper portions and the outer diameter of the upper portion is less than the outer diameter of the lower portion. A bore (52) extends through the lower (42) intermediate (44), and upper portions (46) for providing fluid communication through the seal. The outer diameter of the upper portion and the upper surface of the upper portion at the bore are formed to have bevels (62) such that the propensity for swagging or folding over of the upper surface (56) during the coupling process is reduced. The seal is molded of polyurethane and color coded to mitigate the potential for cross connecting of the normal and emergency compressed air lines of a truck's braking system.</p> |
