| 摘要 |
This is a [relatively] simple load lifting apparatus, tongs-like in appearance, with a larger lower portion for grabbing loads of various sizes. It has two embracing halves, pivoted at a selected distance from the apparatus' top. [Its lower portions tend to be vertical to enable it to hold a containerized load in place, as in previous Gabriel's U.S. Pat. No. 5,209,538.] It is designed to safely and reliably hold a person between its lower portions without injuring one who may be wounded [on the battlefield or in the ocean]. Sensors are added to enable it to sense the distance of the apparatus' lower portions from the load. When in range of the load, its lower portions automatically separate to straddle the load [without making contact with it]. When the flexible fingers, extending inward from the bottom of each lower portion, touch a platform surface or terrain, then a motorized gearing may cause the lower portions to come together. In so doing, the fingers slide underneath the person or a light [containerized] load until the hammerheads above the pivot pin make contact. Then the load is safely inside the two lower portions and ready to be hoisted up[ward]. Strain gages at selected locations on the fingers produce signals, indicating that the fingers have made contact with the surface below. Another technique for causing upper and lower portions to separate from each other is to use electromagnets at apparatus' upper portions, polarized to repel, when needed. Bipolar magnets at hammerheads also can cause their repulsion or attraction, to either separate or engage apparatus' lower portions.
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