Synchronized double post fluid operated lift assembly

Abstract

A double post lift assembly is disclosed wherein each post contains a stationary hollow tube disposed around a hydraulic cylinder and a movable hollow tube disposed around and laterally spaced from the stationary tube. A hollow sleeve is disposed in the space between the stationary and movable tubes of each post and is attached to a lower end portion of the movable tube for movement therewith. A series of spacer blocks constructed of non-abrasive material is disposed in slots arranged in two rows around each sleeve, which blocks project inwardly of the sleeves into sliding engagement with a corresponding stationary tube. A carriage arm containing an adjustable article supporting pad is attached to the lower end of each of the movable tubes. The pads are pivotally attached to the arms so that they may rock through a vertical arc and the arms are adapted to swing through a horizontal arc as the arms lift a rear end portion of a vehicle partially supported thereon. L-shaped safety latches are pivotally attached to each of the movable tubes and contain inwardly projecting legs which extend through slots in the sides of the movable tubes into sliding contact with the stationary tubes. The latches swing inwardly across upper edges of the stationary tubes when the movable tubes rise to a predetermined height to lock the movable tubes in place to prohibit accidental descent thereof upon sudden loss of fluid from the cylinders.