| 摘要 |
1,266,904. Valves. INSTITUTUL PENTRU PLANURI DE AMENAJARE SI CONSTRUCTII HIDROTEHNICE. 18 March, 1969 [18 March, 1968], No. 14289/69. Heading F2V. When deflated, a pair of flow control bags A, A assume the shape shown in Fig. 3 and lie within annular cavity c. Upon inflation of the bags by directing upstream fluid thereto via one of valves (12) and pipe 11, the bags assume the shapes shown in Figs. 4 and 6 and their faces interfit to prevent flow. Premature closure of valve (12) will maintain the bags in a partiallyinflated state. Deflation is controlled by vent valve 16. Each bag can be of fabric-reinforced rubber and is designed to experience no stretching during inflation; the end panels 2a-2d are shaped to allow folding in the deflated condition. The bags can have apertured internal strengthening walls and are bonded to the casing 4. A pressure gauge is provided at 17. |
