Abstract: An inflatable plug adapted to be inserted into a pipe and inflated so as to plug the pipe and form a water tight seal. The inflatable plug is comprised of an inflatable bag of flexible sheet material forming an elongated cylinder having opposite ends. The material at the opposite ends of the cylinder is pleated or folded and wrapped around cylinders. Metal collars are placed over the folded material and swaged so as to clamp the material in fluid tight relation against the cylinders.

Abstract: A jack stand and a method for manufacturing a jack stand of the type used in supporting a vehicle. A rectangular sheet metal plate is stamped so as to form at least two elongated parallel slots in the sheet metal plate, the elongated parallel slots being spaced apart from one another and each being spaced from the lateral sides of the sheet metal plate. The slots define three parallel planar legs integrally joined to a transverse body portion of the rectangular sheet metal plate. The rectangular sheet metal plate is bent such that the transverse body portion of the rectangular sheet metal plate forms a cylindrical body. The legs are each bent about a longitudinal axis and the free ends of the legs are bent radially outwardly away from one another so as to define a tetrahedral structure supporting the cylindrical body.