Patent ID: 7699290

Claim:
A connecting device comprising: an inner tube having a plurality of elongate holes defined through a wall thereof, a plurality of oval-shaped beads movably engaged with the elongate holes, each of the elongate holes having a long axis which is perpendicular to a longitudinal axis of the inner tube, a short axis of each of the elongate holes being parallel to the longitudinal axis of the inner tube, a plurality of oval-shaped beads movably engaged with the elongate holes, each of the beads having a long axis and a short axis, a part of each of the beads in the direction of the short axis protruding beyond an inner surface of the inner tube; an outer tube movably mounted to an outer surface of the inner tube; an inlet member connected to a first end of the inner tube, and a valve unit movably located in the inner tube and having a collar which movably contacts the inner surface of the inner tube and closes the elongate holes.