Patent Number: 7,610,888

Title: Non-guided tappet and fuel injector using same

Abstract: A fuel injector includes an injector body having an internal surface and an external surface. A tappet assembly includes a non-guided tappet and a plunger assembly, and is mounted on the injector body. The tappet assembly is movable with respect to the injector body a displacement distance between an advanced position and an extended position. A portion of the plunger assembly is slidably guided along the internal surface of the injector body, while the non-guided tappet is free of contact with both the internal surface and the external surface of the injector body in the advanced and extended positions. The tappet assembly may be prevented from moving beyond the extended position using a snap ring positioned within a retention opening of the fuel injector body.

Inventors: Rogers; Eric L. (El Paso, IL), Lewis; Stephen R. (Chillicothe, IL), Coldren; Dana R. (Secor, IL)

Assignee: Caterpillar Inc.

International Classification: F02M 47/02 (20060101); F01L 1/14 (20060101)

Expiration Date: 1/03/02017