Claims
- 1. A valve tappet actuated by a cam of an internal combustion engine comprising a cup (1) made of a ferrous material and having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end, said skirt (2) comprising a peripheral groove (4) on an outer surface and two beads (5, 21) on an inner surface, there being arranged concentrically within the cup (1), a metal inner element (6) comprising a casing (9) which bears against at least one of the two beads (5, 21) while a hydraulic valve clearance compensation element (10) is guided for axial displacement in the inner element (6), the cup (1) is hardened in a heat treatment process, and the inner element (6) is unhardened wherein the first bead (5) is arranged on the side of the skirt (2) opposite to the peripheral groove (4) and the second bead (21) is arranged on the end of the skirt (2) adjacent the cup bottom (3).
- 2. A valve tappet of claim 1 wherein the peripheral groove (4) comprises an opening (12) which communicates with the annular chamber (11).
- 3. A valve tapper of claim 1 wherein the casing (9) and the skirt (2) define an annular chamber (11).
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 02 012 |
Jan 1996 |
DEX |
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PRIOR APPLICATIONS
This application is a division of U.S. patent application Ser. No. 364,948 filed Jul. 30, 1999, which is a division of Ser. No. 101,404 filed Jul. 7, 1998, now U.S. Pat. No. 5,979,385 which is a 371 of PCT application EP96/03260 filed Jul. 24, 1996.
US Referenced Citations (11)
Foreign Referenced Citations (4)
Number |
Date |
Country |
4005261 |
Aug 1991 |
DEX |
4325610 |
Feb 1995 |
DEX |
4343876 |
Jun 1995 |
DEX |
9506192 |
Mar 1995 |
WOX |
Divisions (2)
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Number |
Date |
Country |
Parent |
364948 |
Jul 1999 |
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Parent |
101404 |
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