| 摘要 |
<p>A fluid security coupling able to limit bidirectional flow to authorized use comprising, in combination, first and second interconnectable parts each having an axial passage and an end, releasable complementary connection means upon said parts adapted to interconnect upon said ends being aligned and interfitted, a first valve movably mounted with said first passage having a closed position preventing flow through said first passage in a first direction toward said first end, a check valve movably mounted within said first passage axially spaced inwardly from said first valve and said first end limiting flow through said first passage to said first direction, release means mounted within said first passage selectively rendering said check valve inoperative to permit flow therethrough in direction opposite to said first direction, and a release means operator defined on said second part whereby only a second part having an operator will permit bidirectional flow through said first part. The check valve may also be released by pressure between it and the first valve. <IMAGE></p> |
