Expandable piston motor
US4342291A · kind A · utility
8Cited by
6References
13Claims
0Family size
Inventor
Key dates
| Filing date | Jan 16, 1980 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Jan 16, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B75/044
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine comprises a piston having first and second coaxial parts movable axially relative to each other in the direction of reciprocation of the piston and having a chamber therebetween which varies in volume with the relative movement. A conduit for fluid connects the chamber to a lubricant opening on a crank pin of a crankshaft. An inlet rotary valve between the lubricant opening and the chamber permits a flow of pressurized lubricant from the opening to the chamber at a first rotational position of the crankshaft and seals the chamber from the opening at other rotational positions of the crankshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.