Patent ID: 7469939

Claim:
A muff coupling in a rail-mounted vehicle coupler, for interconnecting vehicles, comprising two vehicle coupler components having ends formed with ring-shaped flanges and being interconnectable end-to-end via a muff, the muff comprising: two arch parts tightenable against each other, each arch part having an inner flute formed between two inwardly turned bulges, which flute is delimited by a bottom and two opposite, force-transferring side surfaces, which side surfaces are obliquely inclined or conical in order to, upon radial tightening of the arch parts against each other, be pressed against analogously obliquely inclined or conical shoulder surfaces on said flanges and thereby, by wedge action, transfer axial component forces to the same with the purpose of pressing the ends of the vehicle coupler components in close contact against each other, wherein, at least one of said vehicle coupler components, in addition to a first flange having a first shoulder surface, includes a second flange axially spaced-apart from the first flange and having a second, obliquely inclined shoulder surface, and each arch part having, in the corresponding end, a first force-transferring side surface axially spaced-apart from a second force-transferring side surface, wherein forces that directly or indirectly are transferred from the two analogously obliquely inclined side surfaces on the arch parts are distributed to both the shoulder surfaces on the vehicle coupler component in an axial train of forces near the outside of the vehicle coupler component.