| 摘要 |
The invention relates to an advance in screws having a dual application in relation to shafts and threads and to the interaction between said screws and bolts and shafts. The advance comprises novel coupling threads and a precision connection system which are used to form shafts with a dual-application thread. The invention relates to the manner in which the inventive screw has been developed from a normal screw to a detachable screw and to the different types of dual-application screws which, owing to the variety thereof, are suitable for a large number of diverse industrial, commercial and domestic uses among others. The dual-application screw can be also be used for passenger transport and supply lines that are recommended for use in boats, ships, rigs and ferries in diverse locations, such as seas, deserts, the tundra and others. The aforementioned supply lines comprise appliances, such as robots, and the drilling screw, which, together with the connectors thereof, can be used for the construction of same. In addition, they can be used for the transport by train of materials and persons to hard-to-reach places. The invention also relates to implements that have been improved with the use of the dual application point, such as scissors-type jacks and micrometers among others.
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