Piston assembly
US4836093A · kind A · utility
5Cited by
17References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1986 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Jul 3, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05C2201/021
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A piston assembly is disclosed which reduces the consumption of a lubricating agent circulated to provide lubrication between the outer sidewall of the piston assembly and the interior sidewall of a bore. This is accomplished by providing at least one aperture in at least one compression ring groove. The aperture is disposed in fluid communication with the interior of a hollow skirt portion of the piston for communicating such lubricating agent gathered in the compression ring groove into the interior of the hollow skirt portion of the piston so that the lubricating agent can return to the crankcase of an operating mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.