Electrically operable vehicle jacks

A portable jack for a wheeled vehicle having jack locations interfitting with the jack for elevation of a selected portion of the vehicle by elevation of the jack, wherein said jack comprises:

• a low-profile casing dimensioned to fit on a support surface at a selected jack location of a vehicle, said casing being elongated and comprising side and end walls and a base, said side and end walls being vertically dimensioned to fit within the space underneath the vehicle;
• a high-torque electric motor recessed within said casing adjacent an end thereof, said motor having electrical connector means for connection to the electrical system of the vehicle and a remote control device for remotely controlling the motor at a position spaced away from the vehicle;
• and
• a jack mechanism within said casing, said jack mechanism comprising a first pair of toggle members each having first end portions pivotally supported on said base and second end portions, a second pair of toggle members having first end portions each having a pivotal connection to one of the second end portions of said first toggle members, said second pair of toggle members being disposed in crossing relationship at an intermediate position of each toggle of the pair having a pivotal interconnection at said intermediate position, and an elongated jacking platform for support of the vehicle at a selected one of said jacking locations, one of said second pair of toggle members having a second end portion having pivotal interconnection to said jacking platform, the second end portion of the other toggle member of the second pair slidably supporting the elongated jacking platform, said jack mechanism further comprising an elongated threaded shaft rotatably driven by said motor, a threaded drive nut having threads interfitting with the threads on said shaft, said drive nut being connected to a first one of said first pair of toggle members for affecting relative movement of said toggle members toward one another from a position in which the jack is recessed within the casing to an elevated position sufficient to effect clearance of a selected vehicle wheel above a support surface, said motor being reversibly operable by said remote control device to affect relative movement of said drive shaft and said toggle members away from one another to lower said support platform to the recessed position within said low-profile casing and a stabilizing member supporting said motor and supported by said base.