Patent ID: 8820710

Claim:
A pushbutton mechanism for multi-measure controlling a feeder valve, the mechanism comprising: a lower part and a cover which are connected to each other and together to form a housing; a push bar being in contact with the cover and passing through an opening in the lower part and protruding out from the lower part, said opening being spaced from a center of the lower part; an activation surface being on the cover; and a biasing spring between the cover and the lower part providing mechanic bias at the initial position of the pushbutton mechanism, wherein the cover is able to move from its initial position when approaching relatively to the lower part in response to an external pressing force, wherein the cover is formed as a single piece and is attached to the lower part so that it is movable to angled positions compared to its initial position, wherein the push bar is in an asymmetric arrangement in relation to the biasing spring, and wherein the actual angled position of the cover and thus that part of the displaced push bar protruding out of the lower part depends on the point of exertion of the pressing force on the activation surface.