| 摘要 |
<p>Tubular telescoping members have interrupted circumferential lugs which engage through relative axial movement followed by relative turning movement of the members. A releasable locking device prevents reverse relative turning movement of the members and comprises a plurality of threaded lock elements engaging internally threaded openings in an outer tubular member near its terminal shoulder. Each lock element is accessible exteriorly of the outer member and has a circular flange which projects beyond the terminal shoulder and into a detent provided on an external annular shoulder on the inner member. The circular flange is interrupted at one location by a flat face which is flush with the terminal shoulder when the lock element is turned one-half revolution.</p> |
