| 摘要 |
PCT No. PCT/SE80/00203 Sec. 371 Date Apr. 9, 1981 Sec. 102(e) Date Apr. 9, 1981 PCT Filed Aug. 12, 1980 PCT Pub. No. WO81/00603 PCT Pub. Date Mar. 5, 1981.The invention is a screw and nut assembly having a particular thread configuration. The externally threaded spindle has both a spiral threaded portion and a spiral non-threaded portion which separates the convolutions of the threaded portion. The threaded portion includes a plurality of individual threads, each individual thread extending only over a part of the periphery of the spindle body. The nut member also includes a spiral threaded portion and a spiral non threaded portion which nut portions match the respective portions of the spindle. Because of this arrangement, the nut may be rapidly moved along the spindle body when their respective non-threaded portion are engaged. Thereafter, the nut may be turned so as to engage its threaded portion with the threaded portion of the spindle.
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