Hollow trunnions for scissor jacks

摘要

Hollow trunnions for a scissors type jack which allows a lighter jack to be produced. The hollow trunnion may be formed into a hollow tube and welded and formed with openings for the lead screw. The hollow trunnion may also be formed from solid tubing. A flatted portion may be formed on the trunnion to provide a bearing surface. A modification provides a U-shaped bracket which attaches to the hollow trunnion and which carries a nut through which the screw extends.