Carburetor arrangement of a portable handheld work apparatus
US6938884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Sep 10, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M7/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a carburetor arrangement of a portable handheld work apparatus and includes a carburetor (1), an accelerator pump (2) and a venting pump (3). The venting pump (3) acts on the accelerator pump (2) via a venting line (4). A check valve (5) is mounted in the venting line (4) in such a manner that its outlet end (6) is directed in the direction of the venting pump (3). A pretensioning device (7) is provided which holds a valve body (8) of the check valve (5) closed below a selected difference pressure between the outflow end (6) and an opposite-lying inflow end (9). A support device (10) which acts on the valve body (8) and is actuable, at one end, by pressure at the outflow end (6) without considering pressure at the other end (9) or by pressure on the inflow end (9) without considering the pressure on the other end (6).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.