Patent ID: 9567960
Date: 2017-02-14
CPC Classifications: F01L,F01M,F02M,F04B,F16J

Claim:
1. A fuel pump assembly for an internal combustion engine comprising: a fuel pump housing; a cylindrical bore defined in the fuel pump housing, wherein an upper end of the cylindrical bore is closed by a lower surface of a cylinder head; and a tappet assembly slideably received in the cylindrical bore, wherein the tappet assembly includes a one-piece shoe having a recess defined in a bottom portion thereof, and a roller that is partially received within the recess and configured to engage a cam lobe and to rotate about a roller axis, wherein the shoe comprises a peripheral surface having a cylindrical shape that is configured to correspond to an inside surface of the cylindrical bore, wherein the shoe further comprises two opposed end portions, wherein each of the end portions comprises a flat surface that extends across a corresponding end of the recess beyond which a corresponding end of the roller extends, wherein along the roller axis each of the flat surfaces is an outermost portion of the shoe.