Patent ID: 7703747
Filing Date: 2010-04-27
Classification: B66F

Abstract:
1. A two-position lift bridge for use with a mobile commercial jack stand power unit, with the power unit including a generally rectangular frame having a forward end and a rearward end thereof, a pair of longitudinal side flanges extending upwardly therefrom, with the rearward end having a hydraulic cylinder attached along the longitudinal center thereof and having a rear cover plate extending generally horizontally from the side flanges at the rearward end of the frame and over the cylinder, with the rear cover plate including at least one vertical aperture for positioning the lift bridge thereon and having at least one threaded vertical aperture for securing the lift bridge thereon; a lifting means mounted on the frame including a pair of parallel lift arms having forward ends thereon, with the forward ends each having a leveling pad with an outwardly extended flange having a rectangular upper surface and pivotally attached to the outer side thereof; whereas the forward ends of the lift arms are extendable by the hydraulic cylinder; and whereas at least one of the leveling pads has a vertical aperture in the upper surface for positioning the lift bridge thereon and has a threaded vertical aperture in the upper surface for securing the lift bridge thereon, the lift bridge comprising: a rectangular plate having a forward end, a rearward end, an upper surface, a bottom surface, a left side and a right side, and having at least one pin extending downwardly from the bottom thereof for engaging the aperture in the leveling pad, and having a vertical aperture therein aligned with the threaded aperture of the leveling pad for receiving a threaded fastener there through; and a fastener having a thin flat head and a threaded shaft for engaging the threaded aperture of the leveling pad and the threaded aperture of the cover plate; said bridge for being positioned laterally and horizontally on the leveling pads and secured thereon by said fastener, whereby the power unit is operable for use as a load lifting jack; and said bridge is alternatively for being positioned on the rear cover plate of the power unit and secured with said fastener, whereby the power unit is operable for use with the jack stand.