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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17/00
Safety valves; Equalising valves,; e.g. pressure relief valves
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F16K17/22
actuated by the difference of pressure between two places in the flow line
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F16K17/24
acting directly on the cutting-off member
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F16K17/28
operating in one direction only
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