Patent ID: 6695289
Filing Date: 2004-02-24
Classification: B66F

Abstract:
A motor driven scissors jack assembly comprising:a scissors jack including a lower structure connected to an upper structure, a displacement screw connected to the upper structure, lower structure, and a drive system, the drive system including a motor for extending and retracting the jack, the jack being adapted for use with a vehicular electrical system; a lower limit switch positioned on the lower structure, the lower limit switch including a roller assembly configured for being in direct contact with the displacement screw as the jack approaches a lower limit of travel, the limit switch being configured such that the position of the displacement screw at the lower limit of travel engages the roller assembly and connects the lower limit switch, the lower limit switch being configured to limit the retracting of the jack; and an upper limit switch positioned on the members of the upper structure, the position of the members of the upper structure at an upper limit of travel position being configured to connect the upper limit switch, the connecting of the upper limit switch being configured to limit the extending of the jack.