Launching device for boat trailers

摘要: A launching device detachably mountable upon the stanchion of a boat trailer to exert force prow push rearwardly relative launch when rear portion is immersed in water. The comprises series pivotally joined pairs arms which are capable extension and retraction scissors fashion. crank means rotates screw threadedly engages with corresponding pivots forceably move said alternately closer farther effect contraction expansion device. Expansion exerts pressure thereby urging trailer.