Patent ID: 7237731

Claim:
A fuel injector comprising: a housing having a passageway extending between an inlet and an outlet along a longitudinal axis, the housing including a body proximate the outlet; an armature assembly disposed in the body, the armature assembly having a closure member; and a seat assembly disposed in the body, the seat assembly including: a unitary seat including: a flow portion, the flow portion extending along the longitudinal axis between a first surface and an orifice disk retention surface at a first length, the flow portion having a seat orifice extending therethrough; and a securement portion, the securement portion extending along the longitudinal axis away from the orifice disk retention surface at a second length greater than the first length; and an orifice disk coupled to the orifice disk retention surface so that the orifice disk is aligned in a fixed spatial axial orientation with respect to the flow portion; and at least one weld extending from an outer surface of the body to the surface of the securement portion at a location distal to the flow portion so that the seat and the orifice disk generally maintains its fixed spatial axial orientation with the flow portion.