Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F16
ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
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F16K
VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
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F16K15/14
with flexible valve members
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F16K15/144
the closure elements being fixed along all or a part of their periphery
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F16K15/145
the closure elements being shaped as a solids of revolution, e.g. cylindrical or conical
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