Patent attributes
An improved tension rod having a first thin-wall metal tube, a plastic bushing inserted inside the first metal tube, a second thin-wall metal tube the second metal tube set partially inside the first metal tube, a helically-wound metal spring with an eyelet on one end and a two closed coils on the other end, the metal spring retained inside the first metal tube by a first diameter metal rivet and in the second metal tube by a second diameter metal rivet, the second metal tube having an end cap on the end opposite the first metal tube, a third metal tube being an extension tube connected to the first metal tube by an expansion clamp located between the first metal tube and the extension tube, the extension tube having an end cap located opposite the first metal tube.