The Collaborative International Dictionary of English v.0.48:

Recoverer \Re*cov"er*er\ (r?*k?v"?r*?r), n.
   One who recovers.
   [1913 Webster]

WordNet (r) 3.0 (2006):

recoverer
    n 1: someone who saves something from danger or violence [syn:
         rescuer, recoverer, saver]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

RECOVERER. The demandant in a common recovery, after judgment has been given
in his favor, assumes the name of recoverer.