adjuster

from The Century Dictionary.

• noun A person who adjusts; that which regulates.
• noun In hardware, any appliance used to regulate the movement of a blind, sash, hitching-strap, shaft, or other moving object in a wagon, house, etc.: as, a casement-adjuster, a pole-adjuster, a window-stop adjuster.
• noun In insurance, an officer of an insurance company whose duty is to determine the amount to be paid under a policy of insurance when a partial loss has been sustained.

from the GNU version of the Collaborative International Dictionary of English.

• noun One who, or that which, adjusts.
• noun an insurance agent who examines claims against personal or property damage insurance policies and makes estimates and recommendations regarding the amount which should be paid to the policyholder.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun One who adjusts, especially for the insurance industry's employment title "claims adjuster."

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun one who investigates insurance claims or claims for damages and recommends an effective settlement