Hermetic compressor
US8814539B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2009 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Oct 28, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J1/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hermetic compressor includes a closed vessel for storing lubricating oil, an electric-driving element, and a compressing element driven by the electric-driving element. The compressing element includes a cylinder block forming a compression chamber, a piton that reciprocates inside the compression chamber, and an oiling device for supplying the lubricating oil to an outer circumference of the piston. A first oil groove is concavely formed on the outer circumference of the piston, and a second oil groove is concavely formed on a side opposite to the compression chamber relative to the first oil groove. The second oil groove has a spatial volume same or greater than that of the first oil groove. An expanded clearance portion is provided such that a clearance between the piston and the cylindrical hole portion broadens from a top dead point to a bottom dead point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.