Hydraulic brake controller

摘要: The invention includes a brake system for hydraulic ram (3) or another cylinder, that can be employed as an emergency lifting elevator. When actuated, the arms (27) contact circumferentially to slow and stop falling ram. are preferably lined with accretable material frictionally engages downward motion of may actuated by loss pressure, electronic signal from pressure detector, down overspeed sensor (40) uncontrolled detector. According aspect present invention, controller, which is programmed control system, compares actual elevator sensed detector desired motion. Under certain conditions, if differs motion, controller actuates brake.