Low mass valve lifters
US5070827A · kind A · utility
14Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1991 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Apr 1, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2107
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Low mass hydraulic and mechanical valve lifters are shown and described. The lifters are of oblong configuration for reduced mass, with straight or narrowed sides connecting longitudinally spaced ends having depending semi-cylindrical end walls that are received in similarly shaped end portions of lifter gallery openings to absorb all longitudinal and lateral side loads. The lifters are preferably made by investment casting of steel alloys. The investment casting permits the use of thin semi-cylindrical walls at each end of the valve lifters which also have internal reinforcing ribs extending on their undersides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.