Other

Andreas Stihl Ag Co. Kg

Andreas Stihl Ag & Co.

Andreas Stihl

Roland Adam

Hans Nickel

Werner Geyer

Michael Wissmann

Roland Schierling

Klaus-Martin Uhl

Johannes Menzel

Günter Wolf

Jonas Lank

Reinhard Friedrich

Patrick Schlauch

Steffen Joos

Ralf Tuckermann

Stefan Kummermehr

Markus Keller

Thomas Sonnenkalb

Jens Kern

Manfred Thaiss

Heiko Stöcker

Jörg Bläsi

Heiko Pinkawa

Hans Bossler

Benjamin Wichtler

Harald Bühner

Oliver Ehnes

Martin Bürkle

Horst Brudermüller

A tank filling device for a liquid container has a base body with mounting end to secure the base body on a liquid container. An actuating section is disposed in the base body interior and slidable lengthwise relative to the base body. A liquid valve is connected to an outlet opening for liquid and controls the outlet opening by being coupled to the actuating section such that the liquid valve is manually opened or closed by moving the actuating section. An air channel with air inlet and air outlet supplies air into the liquid container for pressure compensation. The air channel extends from the liquid valve toward the mounting end and has an air valve at the air outlet. The air outlet is provided between the actuating section and the base body and is a slot control valve formed by actuating section and base body.

Tank filling device with vent for a liquid container

The invention relates to a handheld work apparatus having a handle. A throttle trigger and a throttle trigger lock are arranged on the handle. An operating-mode selector having an off position, an operating position and a starting position is provided. The selector, trigger lock and the trigger are pivotally mounted. A first latching element is provided on the selector and a second latching element is provided on the trigger element, which coact in the starting position of the selector and the starting position of the trigger and hold the trigger in its starting position. To ensure that the starting position of the selector can only be engaged when the trigger is actuated, the second latching element lies outside of the pivot path of the first latching element in the non-actuated position of the trigger.

Handheld work apparatus

A starter device () for an internal combustion engine has a starter drum () which acts upon a spring housing () when starting. An intermediate spring () is arranged in the spring housing (). One end of the intermediate spring () is fixed to the spring housing () and the other end of the intermediate spring () can be coupled to the crankshaft () of the engine via a first catch (). The spring housing () and the starter drum () are journalled on a shaft () held at one end. The center of gravity (S) of the spring housing () lies in the region of the support of the spring housing () in order to reduce the acting bearing forces and to increase the service life of the starter device.

Starter device for an internal combustion engine

The invention is directed to a carburetor arrangement in a housing ( ) and especially in the housing of a work apparatus such as a motor-driven chain saw or like portable handheld work apparatus. An engine ( ) is mounted in the housing ( ) and has an inlet channel ( ) which is connected via a connecting pipe ( ) to the intake channel section ( ) of a membrane carburetor ( ). An intake air filter ( ) is mounted on the carburetor ( ) on the end face ( ) facing away from the connecting pipe ( ). Combustion air is supplied through the intake air filter ( ). To avoid a damaging warming of the carburetor, a heat-draining component ( ) is mounted on the end face ( ) of the carburetor which faces away from the connecting pipe ( ). The component ( ) projects beyond the contour of the carburetor ( ).

Carburetor arrangement

A suction head is provided for the end of a fuel hose in a fuel tank of a portable implement. The suction head comprises a cup-shaped housing of polymeric material that is closed off by a cap. Provided on the cap is a connector for the end of the fuel hose. The outer surface of the housing is provided with window-like cutouts that are covered by a filter mesh. In order also with narrow, fragmented tank housings to ensure an immersion of the suction head into the fuel in every operating position, a rod-shaped weight member is disposed in the center of the housing. This weight member extends from the base of the housing to the cap, with a first end of the weight member being held on the base and a second end being held on the cap.

Weighted suction filter for a fuel hose

The invention is directed to a fuel pump for an internal combustion engine such as a two-stroke engine in a portable handheld work apparatus such as a motor-driven chain saw or the like. A pump chamber is connected via a suction valve to a fuel feed and via a pressure valve to a pressure line. A pump membrane delimits the pump chamber and is driven by the fluctuating crankcase pressure of the engine which is present in the work chamber. Pump operation free of disturbances over a wide rpm range is attained with the suction valve to the pump chamber being configured essentially as a valve having the shape of a part circle, The pressure valve is disposed approximately at the center of the suction valve and delimits the pump chamber in the stroke direction of the pump membrane.

Fuel pump for an internal combustion engine

The invention is directed to a fuel-injection arrangement for a two-stroke engine in a portable handheld work apparatus such as a motor-driven chain saw or the like. Fuel is drawn by suction from a fuel tank by a fuel-feed pump and is made available at the suction connection of an injection pump. The injection pump has a pressure connection which is connected to an injection line through which the engine is supplied with fuel. A rapid start of a two-stroke engine provided with this fuel-injection arrangement is achieved by providing a bypass line which conducts fuel and bypasses the injection pump. A switchable flow valve is mounted in the bypass line. The bypass line opens directly into the intake channel conducting combustion air to the engine so that even without the pump action of the injection pump, adequate fuel is made available to the engine for starting the same.

Fuel-injection arrangement for an internal combustion engine

The invention is directed to a fuel-injection arrangement for a two-stroke engine in a motor-driven chain saw. An injection pump is mounted in a base housing with the injection pump including a pump piston axially displaceable in a pump cylinder. The pump piston delimits a pump chamber. The pump chamber is connected via a suction valve to a fuel tank. The fuel drawn by suction is pumped by the pump piston via a pressure valve, an injection line and an injection valve to the engine. For driving the pump piston, the latter is connected at one end to a membrane via a membrane plate. The membrane delimits a work chamber charged with fluctuating crankcase pressure. A simple assembly is provided by arranging the pump chamber, the suction valve and the pressure valve in a common valve housing which, in turn, is seated in the base housing of the injection pump in a seal-tight manner. The injection line is connected directly to the valve housing. This permits a preassembly of the valve housing with the valves provided therein which facilitates the manufacture of the fuel-injection arrangement.

A fuel-injection arrangement and a two-stroke engine define a combination for a portable handheld work apparatus such as a motor-driven chain saw or the like. The combination includes a fuel-feed pump for pumping fuel from a fuel tank and a fuel-injection pump for supplying the fuel for injection into the engine. The fuel-feed pump and the fuel-injection pump are mounted in a con, non injection-pump block separate from the engine. The engine has an intake channel through which combustion air is drawn into the engine and the intake channel is configured so as to open directly into the engine. A throttle flap is pivotally mounted in the intake channel as to be completely separate from the common injection-pump block. The injection pump block is effectively thermally decoupled from the intake channel. The danger of vapor bubble formation because of a heating of the injection pump is thereby reliably avoided. A good decoupling of the injection pump from intensely vibrating engine components can also be provided in this manner.

Injection arrangement for a two-stroke engine

The invention relates to a portable handheld work apparatus having an internal combustion engine and an injection pump. The work apparatus includes an injection-pump block which is mounted on the housing of the work apparatus. The injection-pump block includes a feed pump for pumping fuel from a fuel tank mounted in the housing of the work apparatus and the injection pump for injecting fuel into the engine. An interface is provided between the block and the housing through which connecting lines are passed. Each line includes a connecting receptacle and a plug-in element at the interface. The plug-in elements jointly engage corresponding ones of the connecting receptacles when the injection-pump block is seated in the housing of the work apparatus. In this way, all connections of the connecting lines are made simultaneously when fixing the injection-pump block in position. A simplified installation of the injection-pump block in the housing of the work apparatus is achieved with the invention.

Portable handheld work apparatus having an internal combustion engine

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Besigheim, Germany

Roland Adam