| 摘要 |
<p>An intraluminal graft assembly is provided with a double ball check vavle which is normally urged to a closed position by a single compression spring (24) acting on a first ball (22) to urge it into sealing engagement with a valve seat (44). A spacer (70) between the first ball and the second ball (23) urges the second ball into sealing engagement with a second valve seat (54) when the first valve is in sealing engagement with the associated valve seat. A threaded coupler (80) engages and displaces the second valve axially out of engagement with its associated valve seat carrying with it the spacer and first ball, thereby displacing also the first ball out of engagement with its associated valve seat. The double ball check valve permits the introduction of fluid into, and removal of fluid from, the cavity defined by inner and outer wall members of an intraluminal graft member (14).</p> |
