Quick-acting coupling

摘要

The quick connection comprises a tube (14) for an end of a pipe to be connected and a valve pre-loaded by a spring (48) controlled by the introduction and withdrawal of the pipe end into the tube. The valve comprises a first part (32) sliding in the tube on which the pipe end acts. It has a second part (34) which forms the valve itself mounted coaxially with the first part. A spring (42) is provided between the two valve parts. The pre-load spring has a stiffness less than that of the other spring.