Patent ID: 7360722

Claim:
A fluid injector, comprising: a nozzle body having at least one fluid injection orifice therein and being configured for transmitting fluid toward the injection orifice, the nozzle body having a generally curved internal wall at an end portion of the nozzle body; a check member movably arranged inside the nozzle body for affecting fluid flow through the injection orifice and having (i) a recessed region on the surface of the check member and (ii) a generally curved region at an end portion of the check member; wherein the check member is movable to a flow blocking position in which (i) the check member engages the nozzle body to prevent fluid flow through the injection orifice, (ii) the recessed region is disposed proximate the injection orifice, and (iii) a chamber volume exists between the end portion of the nozzle body and the end portion of the check member.