Combined flapper and piston motion wave board module

Abstract From the Canadian patent

There is described a wet back device for generating waves in a liquid in a test tank or the like. Such devices are known and usually operate a wave generating board by a push-pull piston operation or a flapping wave generating board pivoted in the tank and rocked about a horizontal axis to move water in the tank and create waves therein. The device described is capable of producing the push-pull generated wave motion or the flapper type motion, or a combination of those motions and is provided with seals between the wave generating board and the tank walls or between individual wave generating boards (in a multiple board arrangement) and the walls of the tank. Closure plates are provided on …