Patent ID: 8083210
Filing Date: 2011-12-27
Classification: B66F

Abstract:
1. A mechanism for controlling and positioning a tubular handle of a power unit capable of being connected to a jack stand, and for controlling and positioning a tubular handle of a mobile hydraulic floor jack, wherein the power unit and floor jack includes a generally rectangular frame having a forward end and a rearward end thereof and longitudinal side flanges extending upward therefrom, having a pair of external wheels attached on axles to the side flanges near the rearward end thereof, and a hydraulic cylinder secured at the rearward end thereof, wherein the cylinder includes at least one actuator piston thereon; and the tubular handle having a T-bar hand grip at the proximal end thereof, wherein the mechanism comprises: a yoke capable of being attached to the distal end of the tubular handle, said yoke pivotally attached to a pair of vertical side brackets capable of being mounted to the rearward end of the frame, and said yoke further having a pair of flanges extending rearward therefrom supporting a lateral axle and a cylindrical cam thereon for engaging each actuator piston on successive down-strokes of the tubular handle; one of said vertical side brackets having a series of arcuate upper surfaces concentric with the pivotal attachment to said yoke, including a large radius forward portion, then a small radius arcuate notch portion, then an intermediate radius rearward portion; a barrel attached to said yoke, and aligned radially over the arcuate upper surfaces of said vertical side bracket, with the barrel having an upper surface thereon and a plunger therein with an upper end extending above the upper surface of barrel, and a lower end for extending below the barrel and into the arcuate notch portion of said side bracket; and the barrel including a means for biasing the plunger in the downward direction; a plunger control lever having an extended proximal portion for positioning the lever, and having a rectangular distal end that is pivotally attached to the upper end of the plunger so that as the shorter side of the rectangular end is positioned against the upper surface of the barrel, the lower end of the plunger is fully extended into the arcuate notch portion of said side bracket and retained between the forward edge of the notch portion and the rearward edge of the notch portion for fixing the movement of the tubular handle, for maneuvering the hydraulic jack and power unit.