| 摘要 |
<p>A safety retainer for threaded coupling elements of a valved bush includes a deformable friction locking ring for a threaded safety cap or tube coupling nut adapted to be secured to the bush; a flexible retainer for the cap connected to the locking ring; a special cap nipple insertable into the bore of the bush; a sealing ring in the bore of the bush for engaging the cap nipple; and a tapered tube connector sealing nipple arrangement that engages the sealing ring in the bush in a special manner to preserve the life of the seal. The cap or coupling nut is threaded on the bush and is forced over the locking ring which elastically deforms to hold the cap or nut against unintentional loosening. The cap is held captive by the retainer when it is loosened and removed, and the tube coupling sealing nipple cooperates with the valve in the bush in a desired manner while it does not damage the seal ring in the tube connector side of the bore of the bush. Specific forms of locking rings are disclosed. A special thread pattern with wide angled load carrying faces is used for the external bush threads and the internal cap and coupling nut thread.</p> |
