Patent ID: 7874172

Claim:
An air flow control mechanism for a refrigeration appliance comprising: at least one knob adjustable to regulate air flow in a compartment of the appliance, the knob including a first coupler component, and wherein said knob is configured to rotate in response to an adjustment by a user; a cam including a base, a groove and a second coupler component adapted to make a connection with the first coupler component, wherein the cam base includes the groove, wherein the groove has an arcuate shape and is positioned off-center with respect to a center of the cam base; a crank having a first end a second end, wherein the first end is disposed in the semi-circular groove of the cam base to travel along the groove when the user adjusts the knob; a rod having a front end and a back end, wherein the front end is connected to the second end of the crank; and an obturator connected with the rod back end; wherein the cam base has a common rotational displacement with the knob; and wherein the common rotational displacement of the knob and cam base is transformed to a different rotational displacement transmitted through the rod to the obturator to regulate air flow in response to the adjustment by the user.