Venting valve for a fuel tank
AssigneeAndreas Stihl AG & Co. KG
InventorsGunter Wolf, Reinhold Fink
Life of this patent
Estimating the term…
Abstract
The invention relates to a venting valve for a fuel tank and includes a valve seat and a valve body which lies in sealing contact engagement therewith. The sealing surface of the valve seat faces toward the interior space of the tank in order to ensure an operationally-reliable venting even after long periods of operation without the danger of an outflow of fuel. The opening movement of the valve body is directed toward the interior space of the tank. A fine-porous air filter made of sinter material is mounted forward of the valve seat when viewed in flow direction toward the interior of the tank.
Claims16
A venting valve for a fuel tank of a work apparatus such as a chain saw driven by an internal combustion engine, the fuel tank having a tank wall and defining an interior and the venting valve comprising:
- a valve seat mounted so as to face into said interior of said tank and defining a sealing surface;
- a valve body mounted so as to be movable between an open position wherein said interior communicates with the ambient so as to permit air to flow in a flow direction from the ambient into said interior and a closed position wherein said valve body is in seal-tight contact engagement with said sealing surface and said interior is sealed off from the ambient;
- a finely porous air filter mounted in said tank forward of said valve seat when viewed in said flow direction;
- said valve seat is mounted in said interior and said valve body is mounted so as to move in a direction toward said interior of said tank when moving from said closed position into said open position;
- said valve body being mounted in said interior of said tank;
- a pipe stub having first and second open ends;
- and, said pipe stub being mounted at said first end on said tank wall and said second end defining said sealing surface;
- and,
- said air filter being inserted into said first end of said pipe stub.
Dependencies are inferred from the claim text.