| 摘要 |
PCT No. PCT/FR95/01461 Sec. 371 Date May 5, 1997 Sec. 102(e) Date May 5, 1997 PCT Filed Nov. 7, 1995 PCT Pub. No. WO96/14516 PCT Pub. Date May 17, 1996An obturating device including a body (11) with a recess (8) at one end engageable by a spanner, and a screw thread (2) at the other end for engaging a complementary screw thread (7) in an opening (6) of a housing (3). A locking ring (31) biased by a spring in the obturating device (1) and a complementary locking ring (47) in the opening have asymmetrical teeth which interlock when screwing-in is complete and snap together to prevent loosening of the rings. The tooth flanks that engage one another on loosening are nevertheless sufficiently angled to enable forced unscrewing using a spanner. A skirt (14) protects the mechanism and acts as an abutment in the fully screwed-in position. The obturating device enables locking and unlocking, requires no direct manual operation and is particularly suitable for endoscope insertion openings in aircraft engines.
|
