| 摘要 |
PCT No. PCT/HU85/00080 Sec. 371 Date Aug. 28, 1987 Sec. 102(e) Date Aug. 28, 1987 PCT Filed Dec. 29, 1985 PCT Pub. No. WO87/04224 PCT Pub. Date Jul. 16, 1987.An actuating device for pipe-chamber feeders of hydraulic transport equipments comprising valves or other closing appliances having a closing element that is movable reciprocally between an open and a closed position, the improvement being characterized in said closing element being associated with at least one speed control means, especially a speed reducing means acting at least at the end phase of the closing stroke of said closing element. The speed reducing effect of at least one of said speed control means may be adjustable. |
