| 摘要 |
<p>Disclosed is a coupling for joining two elements with their central axes aligned so that turning one element around its central axis will turn the other element. The coupling comprises a raised portion on an end of one element and a mating recessed portion on an end of the other of the elements adapted to engage with the raised portion. The raised portion comprises a substantially circular disc-shaped base portion, an uneven number of portions integrally formed with and protuberant above the base portion and concentrically located within one surface thereof and a similar number of ribs integrally formed with the base portion and alternating with the protuberant portions and extending outwardly thereof. Each rib member extends substantially from a radius of the base portion to the outer periphery thereof in a substantially symmetrical configuration with the remaining ribs. The recessed portion of the other of the elements comprises a recessed, substantially circular recess portion of similar diameter to the base portion, an inwardly projecting protuberant recess substantially concentric with the circular recess and of similar dimensions to the protuberant portions of the raised portion of the one element, and a plurality of flutes projecting inwardly of the protuberant recess and positioned for mating engagement with the plurality of ribs on the raised portion of the one element.</p> |
