Manually guided implement
AssigneeAndreas Stihl AG & Co. KG
InventorsHelmut Zimmermann, Ralf Tuckermann
Life of this patent
Estimating the term…
Abstract
A manually guided implement having an internal combustion engine and a carburetor for supplying a fuel/air mixture to the engine is provided. Disposed between the internal combustion engine and the carburetor is a housing wall in which is arranged a preheating window for guiding to the carburetor a preheating air stream that is heated-up by the internal combustion engine. A pivotably mounted switching element is provided for closing and opening the preheating window.
Claims17
A manually guided implement having an internal combustion engine that is disposed in a housing and to which a cooling air stream is guided via a cooling air fan, said implement also having a carburetor for supplying a fuel/air mixture to said internal combustion engine, said implement further comprising:
- a housing wall that is disposed between said internal combustion engine and said carburetor for guiding said cooling air stream;
- a preheating window disposed in said housing wall, wherein a partial stream of said cooling air stream, which has been heated-up by said internal combustion engine, is guided through said preheating window to outer surfaces of said carburetor as a preheating air stream and is not utilized as an air intake stream to the carburetor;
- and
- a switching element that is pivotably mounted on said housing wall, wherein said switching element serves for an opening and closing of said preheating window.
A manually guided implement having an internal combustion engine that is disposed in a housing and to which a cooling air stream is guided via a cooling air fan, said implement also having a carburetor for supplying a fuel/air mixture to said internal combustion engine, said implement further comprising:
- a housing wall that is disposed between said internal combustion engine and said carburetor for guiding said cooling air stream;
- a preheating window disposed in said housing wall, wherein a partial stream of said cooling air stream, which has been heated-up by said internal combustion engine, is guided through said preheating window to outer surfaces of said carburetor as a preheating air stream;
- and
- a switching element that is pivotably mounted on said housing wall, wherein said switching element serves for an opening and closing of said preheating window, and wherein said switching element is provided with at least one actuating recess.
A manually guided implement having an internal combustion engine that is disposed in a housing and to which a cooling air stream is guided via a cooling air fan, said implement also having a carburetor for supplying a fuel/air mixture to said internal combustion engine, said implement further comprising:
- a housing wall that is disposed between said internal combustion engine and said carburetor for guiding said cooling air stream, wherein said internal combustion engine is fixed in position on a main implement body of said implement in a vibration-damping manner, wherein a first housing portion is provided on a motor side, wherein a second housing portion is provided on the side of the main body of said implement, wherein a vibration gap is formed between said first and second housing portions;
- a preheating window disposed in said housing wall, wherein a partial stream of said cooling air stream, which has been heated-up by said internal combustion engine, is guided through said preheating window to outer surfaces of said carburetor as a preheating air stream;
- and
- a switching element that is pivotably mounted on said housing wall, wherein said switching element serves for an opening and closing of said preheating window, and wherein said switching element is actuatable through said vibration gap.
A manually guided implement having an internal combustion engine that is disposed in a housing and to which a cooling air stream is guided via a cooling air fan, said implement also having a carburetor for supplying a fuel/air mixture to said internal combustion engine, said implement further comprising:
- a housing wall that is disposed between said internal combustion engine and said carburetor for guiding said cooling air stream;
- a preheating window disposed in said housing wall, wherein a partial stream of said cooling air stream, which has been heated-up by said internal combustion engine, is guided through said preheating window to outer surfaces of said carburetor as a preheating air stream;
- and
- a switching element that is made of an elastic material and is pivotably mounted on said housing wall, wherein said switching element serves for an opening and closing of said preheating window.
Dependencies are inferred from the claim text.