| 摘要 |
1,116,561. Valves. SAUNDERS VALVE CO. Ltd. 17 Aug., 1965 [20 Aug., 1964], No. 34131/64. Heading F2V. A valve comprises a straight through bore 12, and a seating 15 formed by an opening in a casing 11 generally tapering into the bore, the mouth of the opening lying substantially in a plane, a diaphragm closure member 16 clamped at its outer margin to the casing and pressed against the seating by a compressor 19, and shaped so that there is substantially no stretching in the closed position, the seating being merged with the clamping surface by a rounded portion 24 which is of a radius of not less than half the radius of the base of a cone constituted by the tapering side of the seating, taken at the plane of the mouth of the opening. The diaphragm has a peripheral rib (29) on its upper face, Fig. 2, not shown, and is connected to the compressor by an embedded stud 18. The compressor 19 is connected to a rising spindle 36 by a pivot pin 38, and is formed by a central hose portion with radially extending fingers (32), Fig. 3, not shown. In a further embodiment, Fig. 4, not shown, a compressor 19a is hollowed out to lighten it, and is moved by a non-rising spindle (47), and the diaphragm is secured by a nut (44) which allows axial lost motion. |
