Double-acting trolley to support one-cable installations and in particular chair lifts and cabin lifts

Double-acting trolley for a bearing and hauling cable of a one-cable installation support comprising, a bearing member (3) articulated in a swinging manner to the one-cable installation support and two equalizers each having thereon at least two cable guide rollers, and characterized in that above and below the bearing & hauling cable (2) are arranged the two equalizers (9, 14) and (19, 24), respectively, each of which equalizers is articulated centrally thereof (10, 15) and (20, 25), respectively, to a support element (8, 13) and (18, 23), respectively, articulated in an elastically damped manner at one end thereof to the bearing member (3), and to each of the upper and lower apices of the bearing member (3) is articulated (33, 39 respectively) a common equalizing member (32, 38 respectively) extending symmetrically to a symmetry plane (S—S partially above the support elements (8, 13 and 18, 23 respectively) and the ends of which (37, 37′ and 42, 23′ respectively) are loaded elastically with respect to the supports (8, 13 and 18, 23 respectively).