Filter element and method for producing it and tank breather filter with a filter element of this kind

1. Tank breather filter comprising:

a housing, which has a tank opening, which can be connected to a tank that is to be ventilated, and a through-opening, which is connected to a surrounding environment,

a filter element clamped in the housing, said filter element being disposed between the tank opening and the through-opening, the filter element being a one-piece filter element produced from a flat filter material and having an end wall, which is surrounded by a corrugated side wall aligned at an angle with respect to the end wall, wherein:

the housing has a lower housing part adapted to be connected to the tank that is to be ventilated, and an upper housing part, the end wall of the filter element lying against the upper housing part and the side wall of the filter element lying against the lower housing part,

the filter element is clamped between interacting clamping elements of the upper housing part and the lower housing part, and

the clamping elements clamp a region of the side wall of the filter element in a radial direction.

2. Tank breather filter according to claim 1 , wherein the end wall is supported by a support of the lower housing part.

3. Tank breather filter according to claim 1 , wherein the clamping elements are of annular configuration.

4. Tank breather filter according to claim 1 , wherein a first clamping element is integrally connected to the lower housing part.

5. Tank breather filter according to claim 1 , wherein a second clamping element is formed as a component which can be independently handled and is fixed to the upper housing part.

6. Tank breather filter comprising:

a housing, which has a tank opening, which can be connected to a tank that is to be ventilated, and a through-opening, which is connected to a surrounding environment,

a filter element clamped in the housing, said filter element being disposed between the tank opening and the through-opening, the filter element being a one-piece filter element produced from a flat filter material and having an end wall, which is surrounded by a corrugated side wall aligned at an angle with respect to the end wall, wherein:

the housing has a lower housing part adapted to be connected to the tank that is to be ventilated, and an upper housing part, the end wall of the filter element lying against the upper housing part and the side wall of the filter element lying against the lower housing part,

the filter element is clamped between interacting clamping elements of the upper housing part and the lower housing part, and

the clamping elements accommodate between them an outer border region of the side wall.

7. Tank breather filter comprising:

a housing, which has a tank opening, which can be connected to a tank that is to be ventilated, and a through-opening, which is connected to a surrounding environment,

a filter element clamped in the housing, said filter element being disposed between the tank opening and the through-opening, the filter element being a one-piece filter element produced from a flat filter material and having an end wall, which is surrounded by a corrugated side wall aligned at an angle with respect to the end wall, wherein:

the housing has a lower housing part adapted to be connected to the tank that is to be ventilated, and an upper housing part, the end wall of the filter element lying against the upper housing part and the side wall of the filter element lying against the lower housing part,

the filter element is clamped between interacting clamping elements of the upper housing part and the lower housing part, and

the clamping elements are fluted.

8. Tank breather filter comprising:

a housing, which has a tank opening, which can be connected to a tank that is to be ventilated, and a through-opening, which is connected to a surrounding environment,

a filter element clamped in the housing, said filter element being disposed between the tank opening and the through-opening, the filter element being a one-piece filter element produced from a flat filter material and having an end wall, which is surrounded by a corrugated side wall aligned at an angle with respect to the end wall, wherein:

the housing has a lower housing part adapted to be connected to the tank that is to be ventilated, and an upper housing part, the end wall of the filter element lying against the upper housing part and the side wall of the filter element lying against the lower housing part,

the filter element is clamped between interacting clamping elements of the upper housing part and the lower housing part, and

the second clamping element is latched to the upper housing part.

9. Tank breather filter comprising:

a housing, which has a tank opening, which can be connected to a tank that is to be ventilated, and a through-opening, which is connected to a surrounding environment,

a filter element clamped in the housing, said filter element being disposed between the tank opening and the through-opening, the filter element being a one-piece filter element produced from a flat filter material and having an end wall, which is surrounded by a corrugated side wall aligned at an angle with respect to the end wall, wherein:

the housing has a lower housing part adapted to be connected to the tank that is to be ventilated, and an upper housing part, the end wall of the filter element lying against the upper housing part and the side wall of the filter element lying against the lower housing part,

the filter element is clamped between interacting clamping elements of the upper housing part and the lower housing part, and

the second clamping element forms a clamping ring, which is connected to the upper housing part by means of bars.