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US 8,875,676 B2Granted
Roller tappet
AssigneeSchaeffler Technologies AG & Co. KG
InventorsNorbert Geyer, Stefan Dorn
Life of this patent
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AssigneeSchaeffler Technologies AG & Co. KG
InventorsNorbert Geyer, Stefan Dorn
Estimating the term…
A roller tappet (1) is proposed for a high-pressure fuel pump of an internal combustion engine, having a housing (2), in the case of the drive-side end (3) of which two surfaces (5) which lie diametrically opposite one another and are depressed by an outer shell (4) of the housing (2) are applied with in each case one receptacle (6), in which surfaces (5) a pin (8) is mounted which carries a cam roller (7), wherein an inner shell (9) of the housing (2), axially below the cam roller (7) as viewed in the direction remote from the drive, is penetrated by a bridge piece (10), the output-side end (11) of which has a rest (12) for a tappet following part, wherein the outer shell (4) of the housing (2) which is non-stepped as least as far as possible apart from the surfaces (5) is provided as a closed circumferential ring (14), as viewed in the drive direction immediately above upper sides (13) of the surfaces (5), which upper sides (13) run through the housing (2) in the manner of chords, which closed circumferential ring (14) is adjoined by the drive-side end (3), and wherein the receptacles (6) are present in the surfaces (5) as cut-outs which emanate from their upper sides (13) and nestle around the pin (8) in the manner of half-shells.
A roller tappet, comprising a housing having a drive side end on which are arranged two diametrically opposing flats that are pressed in from an outer peripheral surface of the housing, each of said flats comprising a receptacle, a pin carrying a cam roller being mounted in said flats, an inner peripheral surface of the housing, as viewed in a drive distal direction, being penetrated axially below the cam roller by a bridge member, and a driven side end of the bridge member comprising a support for a tappet follower, the outer peripheral surface of the housing, except for the flats, is configured without steps as a closed circumferential ring that, as viewed in a drive direction, extends directly above upper sides of the flats, said upper sides extend with a bowstring-like shape through the housing, said circumferential ring being adjoined by the drive side end, and the receptacles in the flats being configured in form of semi-shell-shaped recesses that start from said upper sides and are in osculating contact with the pin.
Dependencies are inferred from the claim text.