Abstract: A method and apparatus for cleaning articles such as radiators, pizza pans, carburetors, engine parts. A suitable cleaning fluid is placed in a container, and the article to be cleaned is placed in this cleaning fluid. A vibrator is attached to the container such that the vibrations are transferred to the cleaning fluid to clean the articles. The induced waves in the cleaning fluid is a powerful scrubbing force.

Abstract: A radiator having a header is cleaned by at least partially immersing the radiator in a cleaning liquid and then applying ultrasonic energy to the liquid. The cleaning liquid is held in a container which has a sludge pit along the bottom thereof. An ultrasonic transducer is mounted on a carriage and is movable above the sludge pit. A rack is provided above the movable transducer for holding or supporting radiators. The movement of the ultrasonic transducer is controlled in accordance with the width of the radiator being cleaned.

Abstract: A radiator having a header is cleaned by at least partially immersing the radiator in a cleaning liquid so that the header is immersed in the cleaning liquid and then applying ultrasonic energy to the cleaning liquid at an energy sufficient to cause cavitation of the liquid. The header is oriented in a direction toward the source of the ultrasonic energy, whereby the header is in closer proximity to the energy source than the remainder of the radiator, so that the ultrasonic energy is initially directed onto the face of the header.