Fluid flow control method and apparatus for a positive displacement engine or compressor
US4889088A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1988 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Dec 15, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/027
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid control apparatus and method for a positive displacement engine or compressor which has a treatment chamber that communicates with a fluid admission duct and an exhaust duct via a port, and contains a piston within the treatment chamber which reciprocates between a top dead center and a bottom dead center position. The piston carries a poppet valve sealing member which is activated to provide substantially perfect sealing between the port and the treatment chamber when the piston is in the immediate vicinity of top dead center position, and is deactivated when the piston is in a position other than the immediate vicinity of the top dead center position in order to allow fluid to pass freely through the port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.