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US 8,474,427 B2Granted
Tappet
AssigneeSchaeffler Technologies AG & Co. KG
InventorsStefan Dorn, Norbert Geyer, Karsten Kucht
Life of this patent
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AssigneeSchaeffler Technologies AG & Co. KG
InventorsStefan Dorn, Norbert Geyer, Karsten Kucht
Estimating the term…
A tappet (1) for a high-pressure fuel pump having a housing (2), the drive input side (7), which serves as a cam run-on face. The housing (2) incorporates a roller (8), wherein the drive output side (3), which serves as a contact surface for a tappet follower part, of said housing (2) bears against an underside (4) of a bridge piece (6) which projects through an inner casing (5) of the housing (2), and a rotation prevention device (11) which projects beyond the outer casing (10) of the housing (2) extends in a window (9) of the housing (2). The rotation prevention device (11) is formed by a radial elongation of the bridge piece (6). A projection extends from the inner casing (5) of the tappet (1) only on a portion situated diametrically opposite the window (7), which projection is integrally connected and is produced by a punching and embossing process and rises in a wedge shape in a direction of the drive input side. The section (13) of the sheet-steel bridge piece (6) which is situated diametrically opposite the radial elongation (12) is snapped over the projection (15), and this section (13) rests with an edge region (14) of the underside (4) thereof on said projection (15).
A tappet, either for a high-pressure fuel pump or for a valve train of an internal combustion engine, comprising a housing, having a roller or sliding surface incorporated in a drive side thereof used for a cam or eccentric catch and wherein a driven side used for a contact of a tappet follower lies on a bottom side of a bridge part extending through an inner casing of the housing, an anti-rotation device projects past an outer casing and is formed from a radial extension of the bridge part and extends into a window of the housing a projection that is produced by a stamping-embossing process and attached integrally is located on the inner casing of the tappet only on a section thereof diametrically opposite the window, the projection rises with a wedge shape in a direction toward the drive side, and the bridge part is made from steel sheet metal and is snapped, with a section thereof diametrically opposite the radial extension, over the projection and lies on the projection with an edge region of a bottom side thereof.
Dependencies are inferred from the claim text.