US Patent 7958597 Handheld vacuum cleaner

A handheld vacuum cleaner having a housing with an electric motor, a fan driven by the motor, a debris emptying hole for removal of debris from a debris collecting compartment inside the vacuum cleaner, a lid pivotally hinged about a pivot axis and adapted to allow closing and opening of the debris emptying hole, a nozzle defining a nozzle opening in a forward end of the vacuum cleaner through which an air stream may be drawn for collecting debris, and at least two wheels, which are positioned adjacent the nozzle opening and are rotatable about a common rotation axis. The pivot axis for the lid and the rotation axis for the wheels are located on a common axis.