| 摘要 |
A nozzle assembly includes an inner tubular member having a closed end and an opposed open end for receiving a fluid from a source, at least one outlet extending radially through the inner tubular member proximate the closed end, wherein the closed end is configured for insertion into a bore defined by a sidewall in a work piece. The nozzle assembly further includes a slidably movable outer sleeve, having a distal end, disposed around the inner tubular member, wherein the distal end is configured for contact with an exterior edge portion of the bore. The outer sleeve is normally biased to a first position sealing the at least one outlet from the exterior, and slidably movable to a second position unsealing the at least one outlet upon contact with the edge portion of the bore as the closed end of the inner tubular member is inserted into the bore. |
