| 主权项 |
1. A coupling comprising:
a housing having:
a first housing lateral side for receiving a first pipe segment;a second housing lateral side for receiving a second pipe segment, the second housing lateral side being spaced from the first housing lateral side to define a medial axis therebetween; anda housing inner surface extending between the first and second housing lateral sides to define a cavity bisected by the medial axis, the cavity defining an increasing depth from each of the housing lateral sides to the medial axis, the housing inner surface further defining a profile between each of the housing lateral sides and the medial axis, the profile including:
a sidewall portion;a backwall portion; anda transition portion between the sidewall portion and the backwall portion, the transition portion defining a negative slope in the direction the respective housing lateral side to the medial axis, and defining a notch having a first radiused portion, a second radiused portion, and a straight line segment between the first and second radiused portions, the straight line segment defining the negative slope; and a gasket disposed in the housing for forming a seal about a pipe joint, the gasket including:
a first gasket lateral side;a second gasket lateral side spaced from the first lateral side about the medial axis;a gasket exterior surface; anda gasket inner surface, the exterior and inner gasket surfaces extending between first and second gasket lateral surfaces sides so as to be bisected by the medial axis, the gasket inner surface defining a central leg extending along the medial axis, the gasket inner surface further defining a first sealing lip and a second sealing lip, the first and second sealing lips being disposed about the central leg so as to define a first flex point and first transition portion of the gasket inner surface extending between the first sealing lip and the central leg and a second flex point and second transition portion between the second sealing lip and the central leg, the first and second transition portions extending in a direction from a respective one of the first and second sealing lips towards the medial axis and a peripheral wall so as to define a positive slope,wherein in an assembled configuration, the housing engages the gasket so as to locate the notches of the housing between the flex points and the medial axis and fold the gasket about the first and second flex points such that at least one of the first and second gasket lateral sides are directed laterally against the sidewall portion of the inner surface of the housing. |
