Tappet assembly with a ceramic wear pad
US6349689B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Apr 18, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2107
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A tappet assembly for an internal combustion engine, the tappet assembly having a first end mechanically connected to a engine component and second end adapted to contact a cam lobe of a camshaft to displace the engine component, where the tappet assembly includes a tappet body having a recessed pocket positioned at one end thereof, the recessed pocket being defined by an extended peripheral lip of said tappet body, a ceramic wear pad at least partially received within the recessed pocket, and a mechanism for preventing the ceramic wear pad from rotating relative to the recessed pocket. The ceramic wear pad has a top surface for contacting the cam lobe, a bottom surface which is received in the recessed pocket, and a peripheral edge surface thereinbetween. In the preferred embodiment, the mechanism for preventing rotation of the ceramic wear pad includes at least one inwardly angled portion of the peripheral lip, the at least one inwardly angled portion being swaged radially inwardly toward an axial center of the ceramic wear pad to engage the peripheral edge surface of the ceramic wear pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.