Patent ID: 9194348
Filing Date: 2015-11-24
Classification: F02M,Y10T

Abstract:
1. A fuel injector comprising: an injector body with an external thread about a centerline; a tappet with an internal thread that matches the external thread and being slidably mounted on the injector body, the tappet being movable with respect to the injector body along the centerline between a pre-installation position, a retracted operational position, and an advanced operational position, the internal thread being in contact with the external thread at the pre-installation position, but the internal thread being out of contact with the external thread at the retracted operational position and the advanced operational position; and a spring operably positioned to bias the tappet toward the pre-installation position, wherein the tappet is constrained to move between the retracted operational position and the advanced operational position when installed in an engine, and wherein a contact interaction between the internal thread and the external thread at the pre-installation position maintains the tappet assembled to the injector body during pre-installation handling.