Filter element and compressed air filter for separating foreign matter from a compressed air stream

A compressed air filter which is for separating foreign bodies from a compressed air stream and which has:

• a filter element which is constructed according to at least one of the preceding claims;
• and a filter housing which receives the filter element in a sealing manner and which has a housing upper portion having a first sealing face, which is associated with the sealing element of the filter element and which is provided at least partially at the inner periphery, and a housing cap having a second sealing face which is associated with the sealing element of the filter element and which is provided at least partially at the front side;
• the housing cap being able to be connected to the housing upper portion by means of a closure movement of the filter housing in order to form a sealing closure position;
• and
• the filter element being able to be connected to the housing upper portion and the housing cap in such a manner that the closure movement of the filter housing brings about a relative movement which is directed substantially axially towards each other between the collar portion of the filter element and the housing cap, whereby the second sealing face of the housing cap radially expands the sealing element owing to a sealing advance movement along the abutment face of the collar portion of the filter element into sealing abutment with the first sealing face of the housing upper portion.

A filter element which is for separating foreign bodies from a compressed air stream and which has:

• an element lower portion;
• an element upper portion which has a neck portion which forms a first flow channel and a collar portion which is constructed so as to extend at least partially around the neck portion and which is connected to the neck portion so as to form a second flow channel;
• and
• a filter medium which is sealingly connected to the element lower portion and the element upper portion in order to form a gas flow path between the first flow channel and the second flow channel through the filter medium;
• the collar portion having a sealing element receiving portion, which is provided at least partially at the outer periphery, at least one connection channel between one of the two flow channels and the sealing element receiving portion and sealing element fixing portions, which axially delimit the sealing element receiving portion, for securely and sealingly receiving peripheral portions of an associated sealing element in such a manner that an excess pressure which is supplied by the at least one connection channel and which acts on the sealing element brings about expansion of the sealing element in the direction towards the outer side in the region of the sealing element receiving portion.

A filter element which is for separating foreign bodies from a compressed air stream and which has:

• an element lower portion;
• an element upper portion which has a neck portion which forms a first flow channel and a collar portion which is constructed so as to extend at least partially around the neck portion and which is connected to the neck portion so as to form a second flow channel;
• and
• a filter medium which is sealingly connected to the element lower portion and the element upper portion in order to form a gas flow path between the first flow channel and the second flow channel through the filter medium;
• the collar portion having an abutment face, which is provided at least partially at the outer periphery in order to receive an associated sealing element in such a manner that the sealing element has a predetermined radial extent without additional action of force and, when a force acts substantially axially on the sealing element from the direction of the element lower portion, is subjected to predetermined radial expansion owing to the abutment of the sealing element on the abutment face.