US Patent 11350939 Retaining mechanisms for trocar assemblies

Adapter assemblies for connecting loading units to handle assemblies include a trocar assembly releasably securable within an elongate body by a retaining mechanism. The retaining mechanism includes first and second retention members pivotable between a locked position in which the first and second retention members are positioned to be received within respective first and second openings in a trocar housing of the trocar assembly when the trocar assembly is received within a distal portion of the elongate body, and a release position in which the first and second retention members are positioned to be spaced from the respective first and second openings in the trocar housing when the trocar assembly is received within the distal portion of the elongate body, wherein engagement of the first and second retention members with the seal member when in the locked position frictionally retains the first and second retention members in the locked position.