Pipe couplings

A pipe coupling comprising:

• a coupling segment having an inner surface defining a gasket groove;
• and
• a gasket disposed within the gasket groove, the gasket defining a body with a central rib, a plurality of tabs distributed circumferentially about and protruding radially inwardly from the central rib, a sealing rib extending axially from the central rib, a first sealing member extending radially inwardly from the central rib, and a second sealing member extending radially inwardly from the central rib, wherein each tab in the plurality of tabs is positioned axially between the first sealing member and the second sealing member;
• wherein each tab in the plurality of tabs defines a curved outer edge extending from the central rib, each curved outer edge tapering radially inward from the central rib to an apex of the tab;
• wherein the gasket defines a radially outer surface and wherein the sealing rib extends axially along the radially outer surface and axially terminates in an axially outer surface, the axially outer surface extending radially inwardly from the radially outer surface at a first angle relative to the radially outer surface, whereby a thickness of the sealing rib increases from the radially outer surface to a sealing ridge at which the sealing rib radially terminates;
• and
• wherein the gasket further defines an axially outer drafted surface extending at a second angle between the axially outer surface and the sealing ridge.