Patent classifications
E
FIXED CONSTRUCTIONS
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E03
WATER SUPPLY; SEWERAGE
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E03D
WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
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1/00
Water flushing devices with cisterns; ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
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E03D1/30
Valves for high or low level cisterns; Their arrangement; ; Flushing mechanisms in the cistern, optionally with provisions for a pre-or a post- flushing and for cutting off the flushing mechanism in case of leakage
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E03D1/302
with valves kept in open position by means of air or water pressure or by vacuum
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