Other

Jorg Harbeke

Klaus Schmitz

The invention is directed to a cutting filament for a vegetation cutter. The vegetation cutter includes a drive motor which sets the cutting filament in motion thereby producing noise. The cutting filament extends substantially radially outwardly because of the centrifugal force. The cutting filament reduces noise especially at high rotational speeds and thus also at high peripheral speeds. This is achieved in that the cutting filament is configured to have a cross section not having point symmetry. The cutting filament preferably has at least one slot and/or protrusion formed in the surface thereof to extend in the longitudinal direction. The slot and/or protrusion can, for example, be formed so as to follow a helical path with respect to the longitudinal axis of the filament or it can extend parallel to this axis.

Cutting filament for a vegetation cutter

The invention is directed to a membrane carburetor having an intake channel and a choke flap and throttle flap movably mounted in this channel one behind the other when viewed in the direction of flow through the channel. The choke flap is arranged in the intake channel for enriching the mixture for a cold start. The choke flap is pivoted into an out-of-service position so that the choke flap is fully opened after start and after the engine is running and has warmed. The membrane carburetor is as a rule tuned for the idle condition and for the full-load condition. However, relatively lean mixtures can form in the part-load region which can lead to a non-quiet running of the engine and possibly to engine damage. According to the invention, the throttle flap is coupled to the choke flap via a four-rod linkage for achieving a mixture enrichment in the part-load region of the engine. The choke flap is pivotable independently of the choke flap position predetermined by the linkage for the start position.

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Waiblingen-Beinstein, Germany

Jorg Harbeke