Abstract: A nozzle assembly particularly useful in conveyorized washing or rinsing apparatus. The nozzle assembly of this invention includes nozzles pivotally mounted in a manifold and a motor for producing oscillatory motion thereof. The motor is mechanically coupled to each of the nozzles to pivot the nozzles back and forth through a given angle, preferably in a direction transverse to the direction of movement of products being conveyed. Preferably, the motor is powered by the same fluid sprayed by the nozzles. The nozzles are arranged to produce 100% coverage of the product surface being sprayed as it passes thereunder.