Abstract: A towable, flexible, unsinkable water sled for accommodating single or multiple riders. The water sled is designed to be towed behind a motor boat or other similar water craft. A typical embodiment consists of a foam base (14) of flexible, unsinkable, polymer foam upon which the riders ride while being towed. It is very durable, easy to store and to prepare for use. It is easy to board, can be pulled by a motor boat (not shown) of only moderate horsepower, and can be ridden by several riders at once with very different levels of skill.

Abstract: This invention relates to the field of power transmission, and more specially, to a torque responsive belt tensioner for a friction belt. Because of recent concerns for the ecology of our planet there has been a resurgence of interest in human powered vehicles (HPV). This category incudes two, three and four-wheeled vehicles. The invention answers the need-for a power transmitting apparatus that will:a) provide forward motion,b) provide a coasting mode,c) provide a braking action,d) provide a reverse.The belt drive tensioner of this invention is lightweight and simple. It includes a rigid backing plate and idler carrier positioned on a drive shaft adjacent to a drive pulley. Two belt engaging members, rollers, or perpendicular columns or projections of sufficient height to contact the exterior surface of the drive belt are carried by the rigid backing plate.