Electromagnetic fuel injector comprising flexible element for positioning armature

An electromagnetic fuel injector (100) comprises a body (101) having a fuel inlet (102) and a fuel outlet (103) and a base (104) comprising a valve seat (105) connected to the body (101). A disk-shaped armature (106,301) disposed at the fuel outlet for controlling the flow of fuel has an upper surface (304) and a lower surface (108) that comprises a sealing interface with the valve seat (105). A ring-shaped flexible element (111,302) comprising a plurality of spaced flexible legs (303a,303b,303c) is in contact with the injector body (312) and the upper surface (304) of the armature (106,301) and provides a spring bias between the body (312) and armature upper surface (301). When the injector (100) is closed, spring bias between the body (106,312) and armature upper surface (304) maintains the armature in a sealing position with the valve seat (105), and when the injector (100) is open, increased spring bias between the body (312) and armature upper surface (304) impels the armature (301) to return to a sealing position with the valve seat (105).