TELESKOPISCHE ROHRANORDNUNG

摘要

PCT No. PCT/FR93/00322 Sec. 371 Date Sep. 30, 1994 Sec. 102(e) Date Sep. 30, 1994 PCT Filed Apr. 14, 1993 PCT Pub. No. WO93/21448 PCT Pub. Date Oct. 28, 1993A locking device for mutually locking two adjacent sections of a telescoping tubular assembly. An axial extension (7) on one of the tubular sections (2) supports an expandable ring (10) received in the other tubular section (1). A nut (17) is non-rotatably slidable in the ring (10) and screwed onto a threaded portion of the axial extension (7). The ring (10) is itself non-rotatable relative to the first tubular section (1). Relative rotation between the tubular sections (1, 2) moves the nut (17) towards the second tubular section (2) and causes the ring (10) to be expanded by tapered portions (15, 16). The ring is deformed in several places to spread the frictional load.