Patent ID: 8640829
Filing Date: 2014-02-04
Classification: B66B,Y10T

Abstract:
1. A hydraulic elevator system, comprising: an elevator hoistway having an elevator pit and a well hole extending downwardly therefrom, the elevator hoistway further having an upper end opposite the elevator pit; an elevator car disposed within the elevator hoistway; an elevator sling disposed about the elevator car, the elevator sling having a bolster channel and a crosshead; a casing disposed within the well hole, the casing having an upper end and a lower end opposite the upper end; a hydraulic cylinder disposed concentrically within the casing, the hydraulic cylinder having an upper end and a lower end opposite the upper end; a hydraulic ram extensibly disposed concentrically within the hydraulic cylinder, the hydraulic ram having an upper end affixed to the bolster channel of the elevator sling and a lower end opposite the upper end; a hydraulic pump and electric motor assembly installed beneath the lower end of the hydraulic ram; and a gimbal assembly including a gimbal support having an upper end, a gimbal, and an outer ring, the gimbal support being installed between the upper end of the hydraulic cylinder and the gimbal support, the hydraulic ram being attached to the bolster channel, and the hydraulic cylinder being pivotally disposed within the casing by the gimbal assembly.