Piston
US4704949A · kind A · utility
14Cited by
4References
8Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jul 15, 1983 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Jul 15, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/1447
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This application relates to a piston having two sets of three roller bearings mounted by means of milled grooves in a lightweight skirt of less diameter than the piston head. Each triangularly arranged set of roller bearings is symmetrically arranged to give a rolling three point stability and rolling anti-friction support to the piston as it reciprocates in the cylinder. Lubrication of the roller bearings is enhanced by openings through the piston skirt in the area of the oil rings above the roller bearings. The roller bearing axles are mounted in milled grooves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.