Self-adjusting hydraulic valve tappet
US4782799A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Aug 11, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L1/25
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine and being contacted at one end face of the valve tappet by a cam and bearing with a second end face against the end of a valve stem, the tappet comprising a cup-shaped housing comprised of a hollow cylindrical wall closed at one end by an end member against the outside of which the cam abuts and a cylindrical guide sleeve concentric with the cylindrical wall and surrounded by an external oil reservoir and in which the play compensating element is guided for longitudinal movement and abuts at its end against the valve stem characterized in that the valve tappet is comprised of three main structural elements of PA1 (a) the outer metallic cup-shaped housing (1) PA1 (b) a polymeric inner element (4,31,32) accommodated therein defining the guide sleeve and forming the external oil reservoir (17) together with the cup-shaped housing (1) and PA1 (c) the self-adjusting play compensating element (7) guided for longitudinal movement in the guide sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.