A receiver assembly includes a housing having a fixed housing portion and
a shiftable housing portion cooperating to define a hollow cavity. A
flexible membrane secured between the fixed housing portion and the
shiftable housing portion and adapted to allow relative motion between
the fixed and shiftable housing portions. The receiver assembly further
includes a magnetic motor assembly including a displaceable drive rod;
and a link assembly having a first end fixedly attached to an inner
surface of the shiftable housing and a second end coupled to the drive
rod. The link assembly translates the shiftable housing portion relative
to the fixed housing portion in response to the displacement of the drive
rod.