Abstract: A flow rate meter which serves to measure a quantity of air aspirated by an internal combustion engine via an air intake tube. The flow rate meter includes a housing, in which a flow conduit having a measuring body is disposed, the measuring body being pivotable about a bearing shaft in accordance with the flow of the medium counter to a restoring force and being joined via at least one strut to a damping body, which in the form of a movable wall defines a damping chamber with respect to the flow conduit. A retaining groove is embodied in the damping chamber wall and is form-fittingly engaged by a retaining section of an elastic stop body. A stop section of the stop body protrudes into the damping chamber and limits the movement of the damping body.

Abstract: A damping device of an air flow rate meter disposed in the intake tube of an internal combustion engine, which air flow rate meter serves to damp the effect of intake-tube recoiling upon the air flow rate meter. The damping device includes a guide bushing, which is firmly connected with a bearing shaft of the air flow rate meter and has an outer Thread-like groove. A blocking body provided with a matching inner thread-like groove is rotatable on the guide bushing and is supported such that it is axially displaceable counter to a compression spring in the direction toward a detent body attached to the housing. The detent body and the blocking body have latch protrusions oriented toward one another, which upon an axial movement of the blocking body toward the detent body are capable of meshing with one another and stopping the movement of the air flow rate meter in the event of intake-tube recoiling.