Patent ID: 7771502

Claim:
An air-filter device comprising: a casing defining a clean compartment receiving filtered gases and a dirty compartment receiving gases to be filtered, said casing including a side access cover for covering a side access opening communicating with the clean and dirty compartments; a filtering body separating the clean and dirty compartments, installed in an intermediate mounting area, and having a peripheral seal that is applied against a circumferential internal step of the casing, said internal step delimiting the intermediate mounting area in relation to the clean compartment; a supporting body for receiving the filtering body and having a side contact surface; a compression body having a side contact surface and mechanically cooperating with the side contact surface of the supporting body; a side access opening made in the casing for inserting and extracting the filtering body, supporting body, and compression body; said side contact surface of the supporting body having a first inclination, and said side contact surface of the compression body having a complementary second inclination; and wherein the filtering body, the supporting body and the compression body are placed within the casing by movement in a direction of insertion into the casing, and the seal of the filtering body is compressed against the internal step by displacement of the compression body in a direction of extraction that is opposite to the direction of insertion while keeping the filtering body and supporting body stationary, thereby placing the device in a forced stressed position; and a control device cooperating with the compression body and mounted to the casing for controlling displacement of the compression body to slide selectively between the direction of insertion and the direction of extraction to thereby selectively place the device between a release position in which the seal of the filtering body is not compressed, and the forced stress position.