Importance

Loading Importance Indicators...

Abstract

A jack extension tube preferably for vehicles is provided which comprises a tube having a first section with an open end and a second section spaced from the first section, the elongated tube made from a first material. A nut made from a second material less rigid than the first material is fixedly mounted in the first section, the nut having first and second opposed faces and a threaded bore therethrough. The threaded bore preferably terminates in the first and second faces of the nut. Extruded holes are provided in the second section adapted to receive a fastener, a jack screw is received in the first section open end and is threadably received in the threaded bore of the nut. The jack screw has at least one of an exposed end with a gear, an opposite end defining a stop which retains the nut on the jack screw when the nut is threaded to the opposite end of the jack screw, and a gear housing mounted adjacent to the screw. The jack screw is thereby threadingly mounted for movement between a fully extended and a fully retracted position with respect to the nut. The nut preferably has an extension extending outwardly from each of the first and second faces thereof, the extensions made from a third material less rigid than the first material. The extension on each face of the nut is configured so as to contact the at least one of the gear, the stop, and the gear housing to thereby prevent the screw both from damaging the nut by drawing the at least one of the gear, the stop, and the gear housing into the nut as well as drawing the at least one of the gear, the stop, and the gear housing into the elongated tube as the jack screw approaches the fully extended or fully retracted positions with respect to the nut.

Loading the Abstract Image...

First Claim