Membrane carburetor
US5542405A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1995 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Mar 20, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M17/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a membrane carburetor for an engine of a motor-driven chain saw. The membrane carburetor has a fuel-filled control chamber delimited by a control membrane. A throttle flap is mounted in an intake channel and a main nozzle opens into the intake channel upstream of the throttle flap. The main nozzle opening is connected to the control chamber via a fuel channel and a fixed nozzle limiting the inflowing fuel-mass flow. In order to make the mixture composition controllable, an air-supply channel opens into the fuel channel and a control valve is mounted in the air-supply channel. The control valve can be adjusted by a positioning device in dependence upon engine operating data. The positioning device is actuated by a control apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.