Patent ID: 7617759
Filing Date: 2009-11-17
Classification: B66C

Abstract:
1. A precision load positioner apparatus for bidirectionally translating and positioning loads under tension, said apparatus comprising; a. a hydraulic force actuator including, b. an accumulator comprising an outer cylinder having a lower volume forming a hydraulic fluid reservoir and an upper compressible fluid storage volume, said upper and lower storage volumes being separated by a hermetically sealing separator ring longitudinally slidably located within said outer cylinder, c. an up-pump mechanism for pumping hydraulic fluid from said hydraulic fluid reservoir volume of said outer cylinder into a volume of said inner cylinder between said lower head and said piston, to thereby retract said piston rod inwardly into said inner cylinder, d. a down-valve mechanism for transferring hydraulic fluid from said inner cylinder to said reservoir to thereby enable extension of said piston rod outwardly from said cylinder in response to tensional load exerted on said load connector relative to said anchor connector, e. a load cell fixed between said upper cylinder head and said upper connector, said load cell providing an output voltage proportional to tensional force exerted between said upper and lower connectors, and f. a display device for converting said output voltage from said load cell to a visually readable number proportional to said tensional force.