Automatic pet door

A pet door device, comprising

• a casing, having a housing component,
• an identification component, and
• a door positioning component,
• wherein the casing contains a pet access aperture through which a pet may pass and a sliding door suitably adapted for covering and uncovering the pet access aperture;
• the identification component discerns between individual animals and permits access through the door only to designated pets under predetermined conditions;
• and
• the door positioning component is situated within the housing component, is electrically powered, is activated by the pet, and comprises
• an electric motor,
• a power supply, in connection with the electric motor and adapted to provide power to the electric motor,
• a mechanical positioning component, situated within the housing component, and
• a control component,
• whereby the electric motor, as controlled by the control component, causes the mechanical positioning component to laterally move the door between a closed position in which the pet access aperture is covered and an opened position in which the pet access aperture is uncovered, and
• the mechanical positioning component comprises
• a first disk, said first disk oriented in a plane parallel to the plane of travel of the door, said first disk being capable of rotation by the electric motor, said first disk comprising a pin extending substantially perpendicularly from said first disk and located proximate to an edge of said first disk, and
• a second disk, said second disk oriented in a plane parallel to the plane of travel of the door, said second disk being capable of rotation by the first disk, said second disk comprising a pin extending substantially perpendicularly from said second disk and located proximate to an edge of said second disk, with said second disk having substantially the same diameter as the first disk and being oriented next to the first disk in substantially the same plane as the first disk.