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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21/00
Fluid-delivery valves,; e.g. self-closing valves
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F16K21/04
Self-closing valves, i.e. closing automatically after operation
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F16K21/06
in which the closing movement, either retarded or not, starts immediately after opening
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F16K21/08
with ball-shaped closing members
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